JPH1084455A - Solid-state electronic image-pickup device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain same optical image as an optical image, representing an object image to be read at a deviated position. SOLUTION: An incident ray Ir denoting an object image is made incident onto a separation prism 25. Red and blue optical components and a green optical component in the incident ray Ir are separated respectively by dichroic mirrors 30, 34. The green optical component is reflected in the separation prism 25 and made incident onto a 1st line sensor 23. The red and blue optical components are reflected in the separation prism 25 and made incident onto a 2nd line sensor 24. A G-signal denoting the green component of the object image is outputted from the 1st line sensor 23. R, B signals denoting the red and blue color components of the object image are outputted from the 2nd line sensor 24.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a solid-state electronic imaging device having a first line sensor and a second line sensor arranged in parallel with the first line sensor.

[0002]

2. Description of the Related Art A color line CCD is used in an image reading section of an image reading apparatus such as a color facsimile, a color scanner, and a color copier. In the color line CCD, for example, a filter that allows transmission of green light is disposed in parallel with the green line sensor formed on the light receiving surface and the green line sensor, and transmits red light. A filter that permits transmission of blue light and a filter that permits transmission of blue light are constituted by line sensors for red and blue which are alternately formed on the photoelectric conversion elements. A video signal representing a green component of a subject image can be obtained from a green line sensor, and a video signal representing a red component and a blue component of a subject image can be obtained from a red and blue line sensor. Can be. Color·
By moving the line CCD and the target image relatively, the target image is scanned by the color line CCD, and green, red and blue video signals representing the target image are obtained.

There is a small distance between the green line sensor and the red and blue line sensors. Therefore, the target image represented by the output video signal of the green line sensor does not match the target image represented by the output video signal of the red and blue line sensor. It is necessary to match these target images (synchronization).

Conventionally, image synthesizing using a delay line or using a computer has been performed for the purpose of synchronization.

However, when a delay line is used, S / N deteriorates. Performing image synthesis using a computer device requires software for image synthesis.

[0006]

DISCLOSURE OF THE INVENTION An object of the present invention is to eliminate the need for synchronization processing.

A solid-state electronic image pickup device according to a first aspect of the present invention receives a light image representing a target image through an image pickup optical system, enters an incident surface perpendicular to the optical axis of the image pickup optical system, and an incident light incident from the incident surface. A first beam splitter surface transmitting a part of the incident light and reflecting the other, a second beam splitter surface transmitting a part of the incident light and reflecting the other, and the first beam A first reflecting surface for reflecting light transmitted through the splitter surface, a reflected light reflected on the first reflecting surface and a reflected light reflected on the second beam splitter surface, and a first emission surface; Through the second beam splitter surface, a third reflecting surface reflecting the light transmitted through the second beam splitter surface, a reflected light reflected by the third reflecting surface, and a reflected light by the first beam splitter. A fourth reflecting surface that further reflects the reflected light and emits the light through the second emitting surface, and a first optical distance until the light incident from the incident surface exits through the first emitting surface. And a separation prism having the same second optical distance until the light emitted from the incident surface exits through the second emission surface. The separation prism is fixed to the separation prism, and reflects the reflected light from the second reflection surface. A plurality of photoelectric conversion elements are arranged in a row at an image forming position, and a filter allowing transmission of blue light and a filter allowing transmission of red light are alternately formed on the light receiving surface of the photoelectric conversion element. A first line sensor for both red and blue, and fixed to the separating prism in parallel with the first line sensor, arranged at an image forming position of reflected light from the fourth reflecting surface, and green Filter that allows light to pass through Motor is characterized in that it comprises a second line sensor for green which is formed on the light receiving surface.

According to the first aspect, the light images representing the same target image are formed on the light receiving surfaces of the first line sensor and the second line sensor. A blue and red video signal representing the target image is obtained from the first line sensor without synchronization, and a green image representing the same target image as the target image from the second line sensor. A signal is obtained. Synchronization eliminates the need for delay lines or image synthesis using a computer device.

The first beam splitter surface transmits the red and blue light components and reflects the green light component, and the second beam splitter surface transmits the green light component. , Red and blue light components. As a result, the first line sensor is provided with red and blue light components representing the target image, and the second line sensor is provided with green light components representing the target image. A filter allowing transmission of green light from the light receiving surface of the second line sensor may be removed.

The first beam splitter surface transmits a green light component and reflects red and blue light components, and transmits the red and blue light components through the second beam splitter surface. Alternatively, the light source may reflect a green light component.

In this case, the first line sensor is fixed to the separating prism, is arranged at an image forming position of the light emitted from the second reflecting surface, and allows transmission of green light. The filter is a green line sensor formed on the light receiving surface, and the second line sensor is the first line sensor.
A plurality of photoelectric conversion elements are arranged in a line at an image forming position of light emitted from the fourth reflection surface, and are fixed on the light receiving surface of the photoelectric conversion element. A line sensor for both red and blue, in which a filter allowing transmission of blue light and a filter allowing transmission of red light are formed alternately.

[0012] The first line
A green image signal representing the target image is obtained from the sensor,
Blue and red video signals representing the same target image as the target image are obtained from the second line sensor.
A filter allowing the transmission of green light from the first line sensor may be eliminated.

According to a second aspect of the present invention, there is provided a solid-state electronic image pickup device which receives a light image representing a target image through an image pickup optical system, and has an incident surface perpendicular to the optical axis of the image pickup optical system and an incident light incident from the incident surface. A beam splitter surface that transmits a part of the light and reflects the others, a first reflection surface that reflects light transmitted through the beam splitter surface, and further reflects light reflected by the first reflection surface. A second reflecting surface that exits through the first exit surface, a third reflecting surface that further reflects reflected light reflected by the beam splitter surface, and exits through the second exit surface; A first optical distance until the extracted light exits through the first exit surface and a second optical distance until the light exiting from the incident surface exits through the second exit surface. prism, A plurality of photoelectric conversion elements are arranged in a row at an image forming position of light emitted from the second reflection surface and fixed to the separation prism, and allow transmission of blue light on a light receiving surface of the photoelectric conversion element. A first line sensor for both red and blue in which a filter and a filter for transmitting red light are alternately formed, and fixed to the separation prism in parallel with the first line sensor; 3. A filter, which is disposed at an image forming position of light emitted from the reflecting surface of No. 3 and which allows transmission of green light, includes a second line sensor for green formed on the light receiving surface. I do.

In the second aspect of the invention, light images representing the same target image are formed on the light receiving surfaces of the first line sensor and the second line sensor. Without synchronization, blue and red video signals representing the target image are obtained from the first line sensor, and a green video representing the same target image as the target image from the second line sensor. A signal is obtained.

The beam splitter surface may transmit red and blue light components and reflect green light components. Thereby, the first line sensor is provided with blue and red light components representing the target image,
The second line sensor is provided with a green light component representing the target image. A filter allowing transmission of green light from the second line sensor can be eliminated.

The beam splitter surface may transmit a green light component and reflect red and blue light components.

In this case, the first line sensor is fixed to the separating prism, is arranged at an image forming position of the light emitted from the second reflecting surface, and allows transmission of green light. The filter is a green line sensor formed on the light receiving surface, and the second line sensor is the first line sensor.
A plurality of photoelectric conversion elements are arranged in a line at an image forming position of light emitted from the third reflection surface, and are fixed on the light receiving surface of the photoelectric conversion element. A line sensor for both red and blue, in which a filter allowing transmission of blue light and a filter allowing transmission of red light are formed alternately.

Without synchronization, a green video signal representing the target image is obtained from the first line sensor, and blue and blue signals representing the same target image as the target image are obtained from the second line sensor. A red video signal is obtained. It is also possible to eliminate a filter allowing the transmission of green light from the first line sensor.

In the above, the angle between the incident surface and the beam splitter surface is, for example, 45 degrees or 60 degrees.

A solid-state electronic image pickup device according to a third aspect of the present invention receives a light image representing a target image through an image pickup optical system, and has a first incident surface formed symmetrically with respect to an optical axis of the image pickup optical system and a first light incident surface. 2, a first beam splitter surface that transmits part of incident light incident from the first incident surface and reflects the other, and one of incident light incident from the second incident surface. A second beam splitter surface that transmits the portion and reflects the others, a first exit surface that guides the reflected light of the first beam splitter surface and the transmitted light of the second beam splitter surface to the outside, A second exit surface that guides the reflected light of the second beam splitter surface and the transmitted light of the first beam splitter surface to the outside, and receives light from the first incident surface and the second incident surface; Light exits through the first exit surface. And the second optical distance until light incident from the first incident surface and the second incident surface exits through the second exit surface is equal to the first optical distance. A first prism for green, which is fixed to the separating prism, is disposed at an image forming position of light emitted from the first emitting surface, and has a filter formed on the light receiving surface that allows transmission of green light. And a plurality of photoelectric conversion elements are arranged in a row at an image forming position of light emitted from the second emission surface, and are fixed to the separation prism in parallel with the line sensor and the first line sensor. A second line sensor for both red and blue in which a filter allowing transmission of blue light and a filter allowing transmission of red light are alternately formed on the light receiving surface of the photoelectric conversion element. It is characterized by.

In the third aspect of the invention, light images representing the same target image are formed on the light receiving surfaces of the first line sensor and the second line sensor. A green video signal representing the target image is obtained from the first line sensor without synchronization, and blue and red video signals representing the same target image as the target image are obtained from the second line sensor. can get.

The first line sensor is fixed to the separation prism, a plurality of photoelectric conversion elements are arranged in a line at an image forming position of light emitted from the second emission surface, and the photoelectric conversion element And a filter permitting transmission of blue light and a filter permitting transmission of red light are alternately formed on the light-receiving surface of the light-receiving device. A filter fixed to the separation prism in parallel with the first line sensor, disposed at an image forming position of the light emitted from the first light exit surface, and formed on the light receiving surface to allow transmission of green light. Alternatively, a green line sensor may be used.

Red and blue video signals representing the target image are obtained from the first line sensor without synchronization, and green and green video signals representing the same target image as the target image are obtained from the second line sensor. A video signal is obtained. A filter allowing transmission of green light from the second line sensor can be eliminated.

At least one of the angle between the first incident surface and the second exit surface and the angle between the first exit surface and the second incident surface is in the range of 1 to 3 degrees. Preferably, there is. This reduces astigmatism.

A solid-state electronic image pickup device according to a fourth aspect of the present invention receives a light image representing a target image through an image pickup optical system and reflects light incident from the light incident surface perpendicular to the optical axis of the image pickup optical system. A first reflecting surface, a first beam splitter surface that reflects a part of the light reflected on the first reflecting surface and transmits the other, and is parallel to the first reflecting and transmitting surface. A second reflecting surface for reflecting the transmitted light of the first beam splitter surface, transmitting the reflected light reflected on the first beam splitter surface, and further reflecting the reflected light reflected on the second reflecting surface; A second beam splitter surface, a third reflecting surface parallel to the second beam splitter surface, and reflecting light transmitted through the second beam splitter surface, and a second beam splitter surface Reflected at A fourth reflecting surface for further reflecting the reflected light and the reflected light reflected on the third reflecting surface, respectively, and emitting the first and second outgoing light through the outgoing surface; A separating prism having the same optical distance of the first outgoing light and the same optical distance of the second outgoing light, and fixed to the separating prism and arranged at an image forming position of the first outgoing light. A first line sensor for green formed on a light receiving surface, and a filter for allowing transmission of green light, fixed to the separation prism in parallel with the first line sensor, and A plurality of photoelectric conversion elements are arranged in a line at an image forming position of the outgoing light, and a filter allowing blue transmission and a filter allowing red transmission are alternately formed on the light receiving surface of the photoelectric conversion element. Red and Blue combined second
Is provided.

In the fourth aspect of the present invention, light images representing the same target image are formed on the light receiving surfaces of the first line sensor and the second line sensor. A green video signal representing the target image is obtained from the first line sensor without synchronization, and blue and red video signals representing the same target image as the target image are obtained from the second line sensor. can get.

The first beam splitter surface reflects the red and blue light components and transmits the green light component, and the second beam splitter surface reflects the green light component. , Red and blue light components.

In this case, it is possible to eliminate the filter that permits the transmission of green light from the first line sensor.

Further, the first beam splitter surface is
The second beam splitter surface may reflect the green light component and transmit the red and blue light components, and may reflect the red and blue light components and transmit the green light component. .

In this case, the first line sensor is
A filter fixed to the separation prism, a plurality of photoelectric conversion elements are arranged in a line at an image forming position of the first outgoing light, and a filter that allows transmission of blue light on a light receiving surface of the photoelectric conversion element and a filter for red light. A red and blue line sensor alternately formed with filters that allow light to pass therethrough, wherein the second line sensor is fixed to the separation prism in parallel with the first line sensor; A green line sensor is disposed at the image forming position of the second outgoing light and has a filter that allows transmission of green light formed on the light receiving surface.

Red and blue video signals representing the target image can be obtained from the first line sensor without synchronization, and green and green video signals representing the same target image as the target image can be obtained from the second line sensor. A video signal is obtained. A filter allowing transmission of green light from the second line sensor can be eliminated.

The solid-state electronic image pickup device according to the fifth aspect of the present invention receives a light image representing a target image through an image pickup optical system, and includes an incident surface perpendicular to an optical axis of the image pickup optical system and a light incident from the incident surface. A first beam splitter surface that transmits part and reflects the other, a first reflecting surface that is parallel to the first beam splitter surface and reflects light transmitted through the first beam splitter surface A second beam splitter surface that transmits light reflected on the first beam splitter surface, further reflects light reflected on the first reflection surface, and emits the same as first emission light through an emission surface. , Parallel to the second beam splitter plane,
A second reflecting surface that reflects light that is refracted on the first beam splitter surface and transmitted through the second beam splitter surface, and exits through the exit surface as second exit light; Among the light incident from the incident surface, the optical distance of the first outgoing light and the optical distance of the second outgoing light are equal to each other. A plurality of photoelectric conversion elements are arranged in a line at an image forming position, and a filter that allows transmission of red light and a filter that allows transmission of blue light are alternately formed on the light receiving surface of the photoelectric conversion element. A first line sensor for both red and blue, and fixed to the separation prism in parallel with the first line sensor, arranged at an image forming position of the second outgoing light, and transmitting green light Filter that allows Second for green formed on the light plane
Is provided.

Also in the fifth invention, light images representing the same target image are formed on the light receiving surfaces of the first line sensor and the second line sensor. Red and blue video signals representing the target image are obtained from the first line sensor without synchronization, and the second line
A green video signal representing the same target image as the target image is obtained from the sensor.

The first beam splitter surface transmits the red and blue light components and reflects the green light component, and the second beam splitter surface transmits the green light component. , Red and blue light components.

In this case, it is possible to eliminate a filter that allows transmission of green light from the second line sensor.

Further, the first beam splitter surface is
The second beam splitter surface transmits the green light component, reflects the red and blue light components, and transmits the red and blue light components and reflects the green light component. Can also.

In this case, the first line sensor is fixed to the separating prism, and is disposed at the image forming position of the first outgoing light, and a filter that allows transmission of green light is provided on the light receiving surface. The second line sensor is a green line sensor formed on the first line sensor.
The second prism is fixed to the separation prism in parallel with the sensor.
A plurality of photoelectric conversion elements are arranged in a line at an image forming position of the outgoing light, and a filter allowing transmission of blue light and a filter allowing transmission of red light are alternately arranged on the light receiving surface of the photoelectric conversion element. The formed red and blue line sensors are used.

A green image signal representing the target image is obtained from the first line sensor without synchronization, and red and blue color signals representing the same target image as the target image are obtained from the second line sensor. A video signal is obtained. A filter allowing transmission of green light from the first line sensor can be eliminated.

A solid-state electronic image pickup device according to a sixth aspect of the present invention receives a light image representing a target image through an image pickup optical system, and includes an incident surface perpendicular to an optical axis of the image pickup optical system and a light incident from the incident surface. A beam that transmits part and reflects others
A first reflecting surface that reflects light transmitted through the splitter surface and the beam splitter surface and emits as first outgoing light through a first outgoing surface, and a second reflecting surface that reflects light reflected on the beam splitter surface. And a second reflection surface that emits as a second outgoing light through the outgoing surface of the first light outgoing surface. The optical distance of the first outgoing light and the optical A separating prism having the same distance, fixed to the separating prism, arranged at the image forming position of the first outgoing light, and formed on a light receiving surface with a filter for allowing transmission of a green light component; A plurality of photoelectric conversion elements are arranged in a line at an imaging position of the second emitted light, and a blue light is transmitted on a light receiving surface of the photoelectric conversion element. Filter and red Wherein the filter which allows the transmission is provided with a second line sensor for red and blue combined are alternately formed.

In the sixth aspect of the present invention, light images representing the same target image are formed on the light receiving surfaces of the first line sensor and the second line sensor. A green video signal representing the target image is obtained from the first line sensor without synchronization, and blue and red video signals representing the same target image as the target image are obtained from the second line sensor. can get.

The beam splitter surface can reflect red and blue light components and transmit green light components. In this case, it is possible to eliminate the filter that allows the transmission of green light from the first line sensor.

Further, the beam splitter surface reflects green light components and transmits red and blue light components, and the first line sensor is parallel to the first line sensor. A filter fixed to the separation prism, a plurality of photoelectric conversion elements are arranged in a line at an image forming position of the first outgoing light, and a filter that allows transmission of blue light on a light receiving surface of the photoelectric conversion element and a filter for red light. A line sensor for red and blue is formed alternately with a filter allowing light transmission, and the second line sensor is replaced with the first line sensor.
A green line, which is fixed to the separation prism in parallel with the line sensor and is disposed at the image forming position of the second emitted light, and has a filter formed on a light receiving surface, which permits transmission of green light. Sensor.

Red and blue video signals representing the target image can be obtained from the first line sensor without synchronization, and green and green video signals representing the same target image as the target image can be obtained from the second line sensor. A video signal is obtained. A filter allowing transmission of green light from the second line sensor can be eliminated.

In the solid-state electronic imaging device according to the seventh aspect of the present invention, a light image representing a target image is incident through an imaging optical system, and the incident light beam is divided into a first light beam and a second light beam each representing the target image. A birefringent plate, a first line sensor disposed at an image forming position of an image represented by the first light beam, and a filter for transmitting green light formed on a light receiving surface;
A plurality of photoelectric conversion elements are arranged in a row at an image forming position of an image which is parallel to the first line sensor and represented by the second light beam, and a blue light It is characterized by comprising a second line sensor for both red and blue in which a filter allowing light transmission and a filter allowing red light transmission are alternately formed.

The birefringent plate separates a light image representing the same target image into two. The two separated light images are formed on the light receiving surfaces of the first line sensor and the second line sensor. The above first without synchronization
A green video signal representing the target image is obtained from the line sensor, and red and blue video signals representing the target image are obtained from the second line sensor.

[0046]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a block diagram showing the electrical configuration of a film scanner.

A photographic film 13 on which a target image to be read is recorded is disposed between the light source 10 and the imaging lens 14. The photo film 13 is transported by the transport mechanism 12 to the drum 11
It is wound up. In the process of winding the photo film 13 around the drum 11, the target image recorded on the photo film 13 is read. The light image representing the target image is captured by the imaging lens 14.
The chromatic aberration is thereby removed, and the light is guided to the image pickup device 15 with a light separation function.

The image pickup device 15 with a light separating function has a separating prism.
25 are included. In this separating prism 25, the incident light is split into two light beams representing the same light source.
One of the rays passes through the cover glass 26 and is transparent
The light enters a first line sensor 23 provided at 27. The other light beam passes through the cover glass 26 and enters the second line sensor 24 provided on the transparent base 27.

As shown in FIG. 2, the first line sensor 23
Both the photo film and the second line sensor 24
13 are arranged in a direction orthogonal to the transport direction. On the light receiving surface of the first line sensor 23, a filter that transmits a green light component is provided. Second line sensor 24
On the light receiving surface, filters that transmit red light components and filters that transmit blue light components are provided alternately.

When the photographic film 13 is transported by the transport mechanism 12 as described above, the target image recorded in the image recording area 13A of the photographic film 13 is transferred to the first line sensor 23 and the second line sensor. Read from 24.
The first line sensor 23 outputs a green (G) signal representing a green component of the target image. Second line sensor 24
, A red (R) signal and a blue (B) signal representing the red and blue components of the target image are output alternately.

G output from the first line sensor 23
The signal is provided to the preamplifier circuit 16 and amplified. The amplified G signal is supplied to an analog / digital (A / D) conversion circuit 17.
Is converted into digital image data and output (G data).

R output from the second line sensor 24
And B are supplied to a preamplifier circuit 18 and amplified. The amplified alternating signal of R and B is converted into digital image data in an A / D conversion circuit 19. The alternate digital image data of R and B is applied to a color separation circuit 20.

In the color separation circuit 20, the digital image data of R and B alternate between the digital image data of R (R data) and the digital image data of B (B data).
Respectively. The R data is supplied to a first interpolation circuit 21, where interpolation processing is performed so that the data amount becomes the same as the data amount of the G data, and is output. The B data is supplied to a second interpolation circuit 22, where an interpolation process is performed so that the data amount becomes the same as the data amount of the B data, and is output.

When the G data, R data and B data are supplied to the monitor display device, the target image recorded on the photo film 13 is displayed. G data,
The target image is printed by supplying the R data and the B data to the printer.

FIG. 3 shows a specific configuration of the image pickup device 15 with a light separating function.

In the base 27, a first line sensor 23 and a second line sensor 24 are embedded perpendicularly and parallel to the paper surface. A cover glass 26 is fixed to the base 27. A separating prism 25 is arranged on the cover glass 26.

The separation prism 25 includes a first prism 31, a second prism 32, and a third prism 33.

The first prism 31 has a first surface 31A and a second surface 31A.
And has a shape of an isosceles triangle when viewed from a plane. The first surface 31A is an incident surface of the incident light beam Ir and is perpendicular to the optical axis Oa. Second
A dichroic mirror 30 that transmits a green light component and reflects red and blue light components is attached to the surface 31B. A dichroic mirror that transmits red and blue light components and reflects green light components is provided on the third surface 31C.
34 is affixed.

The second prism 32 has a first surface 32A, a second surface 32B, a third surface 32C, and a fourth surface 32D. The first surface 32A is a light incident surface, and the first prism 32A
31 is adhered to the back surface of the second surface 31B. Each of the second surface 32B and the third surface 32C is a total reflection surface.
The fourth surface 32D is an emission surface and is in contact with the cover glass 26.

The third prism 33 has a shape in which the second prism 32 is axisymmetric, and has a first surface 33A, a second surface 33B,
It has a third surface 33C and a fourth surface 33D. The first surface 33A is a light incident surface, and is bonded to the back surface of the third surface 31C of the first prism 31. The second surface 33B and the third surface 33C are total reflection surfaces. The fourth surface 33D is an emission surface and is in contact with the cover glass 26.

The incident light Ir representing the target image enters from the incident surface 31A of the first prism 31. The incident light beam Ir is refracted on the incident surface 31A and is incident on the second surface 31B or the third surface 31C of the first prism 31. The red and blue components of the incident light Ir incident on the second surface 31B are reflected and transmitted through the third surface 31C of the first prism 31. Third
The light of the red and blue components transmitted through the surface 31C enters the third prism 33 and is totally reflected on the third surface 33C. The light of the red and blue components totally reflected on the third surface 33C is transmitted through the cover glass 26 and the second line sensor 24
It is led to. The red and blue components of the incident light Ir incident on the third surface 31C of the first prism 31 are reflected on the third surface 31C.
Transmits 31C. The light of the red and blue components transmitted through the third surface 31C enters the third prism 33 and is totally reflected on the second surface 33B. The red and blue component lights totally reflected on the second surface 33B are guided to the third surface 33C. The light is totally reflected again on the third surface 33C and guided to the second line sensor 24. The red and blue components of the incident light Ir are incident on the second line sensor 24.

The green component of the incident light Ir incident on the third surface 31C of the first prism 31 is reflected, and the first prism
The light is transmitted through the second surface 31B of the base 31. The light of the green component transmitted through the second surface 31B enters the second prism 32 and the third surface 32C
Is totally reflected. The green component light totally reflected on the third surface 32C passes through the cover glass 26 and is guided to the first line sensor 23. The second surface of the first prism 31
The green component of the incident light Ir incident on 31B passes through the second surface 31B. The light of the green component transmitted through the second surface 31B enters the second prism 32 and is totally reflected on the second surface 32B. The green component light totally reflected on the second surface 32B is guided to the third surface 32C. The light is totally reflected again on the third surface 32C and guided to the first line sensor 23.
The green component of the incident light Ir enters the first line sensor 23.

The first line sensor 23 outputs a G signal representing the target image, and the second line sensor 24 outputs an R signal and a B signal representing the same target image as the target image. Synchronization processing for matching target images is not required.

In the above, the second surface of the first prism 31
A dichroic mirror that reflects green component light and transmits red and blue component light is attached to 31B.
A dichroic mirror that transmits green component light and reflects red and blue component light may be attached to 31C.
In this case, a filter that transmits red light and a filter that transmits blue light are alternately formed on the first line sensor 23, and transmits green light on the second line sensor 24. Form a filter. Also, the G signal is supplied to the preamplifier 16
, And the R signal and the B signal are supplied to the preamplifier circuit 18.

FIG. 4 shows another example of an image pickup apparatus with a light separating function. In this figure, the same components as those shown in FIG.

The separation prism 35 includes a first prism 36 and a second prism 37.

The first prism 36 has a first surface 36A,
Surface 36B, a third surface 36C, and a fourth surface 36D. The first surface 36A is an incident surface of the incident light Ir, and the optical axis O
perpendicular to a. The second surface 36B forms an angle of 45 degrees with the first surface 36A. A dichroic mirror 38 that transmits red and blue light components and reflects green light components is attached to the second surface 36B. The third surface 36C is a total reflection surface. The fourth surface 36D is an emission surface and is in contact with the cover glass 26.

The second prism 37 has a first surface 37A and a second prism 37.
37B, a third surface 37C, and a fourth surface 37D. The first surface 37A is a light incident surface, and the first prism
36 is attached to the back surface of the second surface 36B. Second side
37B and the third surface 37C are total reflection surfaces, respectively. The fourth surface 37D is an emission surface and is in contact with the cover glass 26.

The incident light Ir representing the target image enters from the incident surface 36A of the first prism 36. The incident light beam Ir is refracted at the incident surface 36A and enters the second surface 36B. Of the incident light Ir incident on the second surface 36B, the green component is reflected by the dichroic mirror 38, and the red and blue components are transmitted. The green component light reflected on the second surface 36B is totally reflected on the third surface 36C, and is reflected on the fourth surface 36D.
And first line sensor through cover glass 26
Guided to 23. An incident light Ir is applied to the first line sensor 23.
Of these, the green component is incident.

The light of the red and blue components transmitted through the second surface 36B of the first prism 36 is incident on the second prism 37 and is totally reflected on the second surface 37B. The light totally reflected on the second surface 37B is guided to the third surface 37C, and this third surface 37C
Total reflection occurs even at 37C. Light totally reflected on the third surface 37C is guided to the second line sensor 24 through the fourth surface 37D and the cover glass 26. The second line
The blue component and the red component of the incident light Ir enter the sensor 24.

In the above, the second surface of the first prism 36
The dichroic mirror affixed to 36B reflects green component light and transmits red and blue component light, but transmits green component light and reflects red and blue component light. It may be. In this case, a filter transmitting red light and a filter transmitting blue light are alternately formed on the first line sensor 23,
A filter that transmits green light is formed on the line sensor 24. Further, the G signal is given to the preamplifier circuit 16,
The signal and the B signal are provided to the preamplifier circuit 18.

FIG. 5 shows another example of an image pickup apparatus with a light separating function. In this figure, the same components as those shown in FIG.

The separation prism 40 includes the first prism 36 and the second prism 36.
Prism 37. The angle between the incident surface 36A of the first prism 36 and the second surface 36B of the first prism 36 is
60 degrees.

In the example shown in FIG.
Of the incident light Ir, the light of the green component enters the first line sensor 23, and the light of the red and blue components enters the second line sensor 24.

FIG. 6 shows another example of an image pickup apparatus with a light separating function. In this figure, the same components as those shown in FIG.

The separation prism 45 includes a first prism 46 and a second prism 47. The first prism 46 and the second prism 47 have line-symmetric shapes.

The first prism 46 has a first surface 46A and a second surface 46A.
Surface 46B and a third surface 46C. First side 46
A is the entrance surface, and the third surface 46C is the exit surface. Second
Prism 47 has a first surface 47A, a second surface 47B, and a third surface 47C. First surface of first prism 46
The angle between 46A and the third surface 47C of the second prism 47 and the first surface 47A of the second prism 47 and the first prism 46
Third minute angle Δθ from parallel to both the angle between the surface 46C illustrated in FIG. 7 of (is Δθ is the difference between the theta ₁ and theta _2, for example, 1 degree to 3 degrees) are shifted in. This reduces astigmatism.

A half mirror 48 is provided between the second surface 46B of the first prism 46 and the second surface 47B of the second prism 47.
Is provided.

The incident light Ir representing the target image enters from the incident surface 46A of the first prism 46 or the incident surface 47A of the second prism 47. The incident light beam Ir is refracted at the incident surface 46A and guided to the second surface 46B. The incident light Ir is partially transmitted by the half mirror 48 and partially reflected. The light transmitted through the half mirror 48 exits from the third exit surface 47C of the second prism 47 and enters the second line sensor 24. The reflected light from the half mirror 48 exits from the third surface 46C of the first prism 46 and enters the first line sensor 23. The incident light Ir is refracted on the incident surface 47A of the second prism 47 and guided to the second surface 47B. The incident light Ir is partially transmitted by the half mirror 48 and partially reflected.
The light transmitted through the half mirror 48 exits from the third exit surface 46C of the first prism 46 and enters the first line sensor 23. The reflected light from the half mirror 48 exits from the third surface 47C of the second prism 47 and enters the second line sensor 24.

As described above, the filter for transmitting the green light component is formed on the light receiving surface of the first line sensor 23, and the red light component is formed on the light receiving surface of the second line sensor 24. And a filter that transmits blue light components. Therefore, the first line
A G signal representing the target image is output from the sensor 23,
An R signal and a B signal representing the same target image as the target image are output from the line sensor 24.

FIG. 8 shows another example of an image pickup apparatus with a light separating function. In this figure, the same components as those shown in FIG.

The separation prism 50 includes a prism 51, a first glass plate 52, and a second glass plate 53.

The prism 51 has a first surface 51A and a second surface 51A.
B, a third surface 51C, a fourth surface 51D, a fifth surface 51E, and a sixth surface 51F. The first surface 51A is incident light I
r is perpendicular to the optical axis Oa. Second surface 51B
Is a total reflection surface. The third surface 51C is substantially parallel to the second surface 51B, and has a dichroic mirror 54A that reflects red and blue light components and transmits a green light component. One surface of the first glass plate 52 is provided on the back surface of the third surface 51C. Other surface 52 of first glass plate 52
A is a total reflection surface. A dichroic mirror 54B that reflects a green light component and transmits red and blue light components is attached to the fourth surface 51D of the prism 51. One surface of the second glass plate 53 is provided on the back surface of the fourth surface 51D. The other surface 53A of the second glass plate 53 is a total reflection surface. The fifth reflecting surface 51E of the prism 51 is the fourth reflecting surface 51.
It is almost parallel to D and is a total reflection surface. The fifth surface 51F of the prism 51 is in contact with the cover glass 26.

The incident light Ir representing the target image is a prism
The light is incident from the 51 incident surface 51A. The incident light Ir
The light is refracted at A and enters the second surface 51B. Incident light I
r is totally reflected on the second surface 51B and guided to the third surface 51C. The red and blue components of the incident light Ir are reflected on the third surface 51C. The red and blue components are transmitted through the fourth surface 51D and reflected on the other surface 53A of the second glass plate 53. Reflected light of red and blue components is prism
The light is totally reflected on the fifth surface 51E of the first sensor 51, and enters the second line sensor 24 through the sixth surface 51F and the cover glass 26.

The green component of the incident light Ir totally reflected on the second surface 51B of the prism 51 passes through the dichroic mirror attached to the third surface 51C, and the other surface 52A of the first glass plate 52. Is totally reflected. The green component light totally reflected on the surface 52A is incident on the fourth surface 51D of the prism 51.
Again totally reflected. This green component light is prism
The light 51 is totally reflected on the fifth surface 51E of the first sensor 51, passes through the sixth surface 51F and the cover glass 26, and enters the first line sensor 23.

In the above description, a dichroic mirror that reflects green component light and transmits red and blue component light is attached to the third surface 51C of the prism 51, and transmits green component light to the fourth surface 51D. , A dichroic mirror that reflects light of red and blue components may be attached. In this case, a filter that transmits red light and a filter that transmits blue light are alternately formed on the first line sensor 23, and transmits green light on the second line sensor 24. Form a filter. The G signal is supplied to the preamplifier circuit 16, and the R signal and the B signal are supplied to the preamplifier circuit 18.

FIG. 9 shows another example of an image pickup apparatus with a light separating function. In this figure, the same components as those shown in FIG.

The separation prism 55 includes a prism 56, a first glass plate 57, and a second glass plate 58.

The prism 56 has a first surface 56A and a second surface 56A.
B, a third surface 56C and a fourth surface 56D. The first surface 56A is an incident surface of the incident light Ir and is perpendicular to the optical axis Oa. A dichroic mirror 59A that reflects the green light component and transmits the red and blue light components is attached to the second surface 56B. The first on the back of the second surface 56B
One surface of the glass plate 57 is provided. The other surface 57A of the first glass plate 57 is a total reflection surface. Third of prism 56
A dichroic mirror 59B that reflects red and blue light components and transmits green light components is attached to the surface 56C. One surface of the second glass plate 58 is provided on the back surface of the third surface 56C. Another surface 58A of the second glass plate 58
Is a total reflection surface. The fourth surface 56D of the prism 56 is in contact with the cover glass 26.

The incident light Ir representing the target image is a prism
The light enters from the 56 incident surface 56A. The incident light Ir
A is refracted at A and guided to the second surface 56B. Incident light I
The green component of r is reflected on the second surface 56B. The green component transmits through the third surface 56C and is reflected on the other surface 58A of the second glass plate 58. The reflected light of the green component is the fourth
Incident on the first line sensor 23 through the surface 56D and the cover glass 26.

The red and blue components of the incident light Ir are reflected by the dichroic mirror 59A attached to the second surface 56B.
And is totally reflected on the other surface 57A of the first glass plate 57. The red and blue component lights totally reflected on the surface 57A are reflected on a dichroic mirror 59B attached to the third surface 56C of the prism 56. The light of the red and blue components is incident on the second line sensor 24 through the fourth surface 56D of the prism 56 and the cover glass 26.

In the above description, a dichroic mirror that transmits green component light and reflects red and blue component light is attached to the second surface 56B of the prism 56, and reflects green component light to the third surface 56C. , A dichroic mirror that transmits light of red and blue components may be attached. In this case, a filter that transmits red light and a filter that transmits blue light are alternately formed on the first line sensor 23, and transmits green light on the second line sensor 24. Form a filter. The G signal is supplied to the preamplifier circuit 16, and the R signal and the B signal are supplied to the preamplifier circuit 18.

FIG. 10 shows another example of an image pickup apparatus with a light separating function. In this figure, the same components as those shown in FIG.

In the example shown in FIG. 10, a reflection mirror 64 for guiding the incident light Ir to the separation prism 60 is provided.

The separation prism 60 includes the first prism 62 and the second prism 62.
Prism 63. First prism 62 and second prism
Each of the prisms 63 has a right-angled triangle shape when viewed from a plane, and is arranged line-symmetrically.

The first prism 62 has a first surface 62A, a second surface 62B, and a third surface 62C. First surface 62A
Is the entrance surface, and the third surface 62C is the exit surface. The second prism 63 has a first surface 63A, a second surface 63B, and a third surface 63C. The second surface 63B is a total reflection surface,
The third surface 63C is an emission surface.

A dichroic mirror 61 that reflects red and blue components and transmits a green component is attached to a second surface 62B of the first prism 62.

The light path Ir of the incident light beam Ir representing the target image is changed by the reflecting mirror 64 and the incident surface 62 of the first prism 62 is changed.
It is led to A. The red and blue components of the incident light Ir are reflected by a dichroic mirror 61 attached to the second surface 62B of the first prism 62. The red and blue light components are totally reflected on the back surface of the first surface 62A and enter the second line sensor 24.

The green component of the incident light Ir passes through the dichroic mirror 61 and the second surface of the second prism 63
The light is totally reflected at 63B and enters the first line sensor 23.

In the above description, the second surface of the first prism 62
The dichroic mirror affixed to 62B transmits green component light and reflects red and blue component light, but reflects green component light and transmits red and blue component light. There may be. In this case the first
A filter that transmits red light and a filter that transmits blue light are alternately formed on the line sensor 23, and a filter that transmits green light is formed on the second line sensor 24. The G signal is supplied to the preamplifier circuit 16, and the R signal and the B signal are supplied to the preamplifier circuit 18.

FIG. 11 shows another example of an image pickup apparatus with a light separating function. In this figure, the same components as those shown in FIG.

A birefringent plate (calcite, quartz, tourmaline, etc.) 70 is disposed on the upper surface of the cover glass 26. Birefringent plate
The entrance surface 70A of the projection 70 is perpendicular to the optical axis Oa. The incident surface 70A is formed such that the angle between the birefringent plate 70 and the optical axis is 45 degrees.

The incident light Ir representing the target image is a birefringent plate.
When entering the 70 separated into an ordinary ray R _O and the extraordinary ray R _E. Incident surface 70A of the birefringent plate 70 so perpendicular to the optical axis ordinary ray R _O is incident on the first line sensor 23 without being refracted. Extraordinary ray R _E refracted in the birefringent plate 70 is incident on the second line sensor 24.

As described above, the filter for transmitting the green light component is formed on the light receiving surface of the first line sensor 23, and the red light component is formed on the light receiving surface of the second line sensor 24. And a filter that transmits blue light components. Therefore, the first line
A G signal representing the target image is output from the sensor 23,
An R signal and a B signal representing the same target image as the target image are output from the line sensor 24.

[0105] The distance Δx nearly 6.2 and the thickness of the birefringent plate 70 and t [mm] of an ordinary ray R _O and the extraordinary ray R _E is emitted
t [μm]. Therefore, depending on the thickness of the birefringent plate 70, the first line sensor 23 to the second line sensor 24
Just let go.

Since the green light component is extracted by the dichroic mirror in the above embodiment, FIG.
It is not always necessary to provide a filter for transmitting a green light component on the first line sensor 23 included in the imaging device with a light separation function shown in FIGS. 4, 5, 8, 9, and 10. Absent. In the above embodiment, a half mirror may be used instead of using a dichroic mirror. In this case, one of the two line sensors is provided with a filter that allows transmission of the green light component, and the other line sensor is provided with a filter that allows transmission of the red light component and a blue light component. Filters that allow transmission of components are provided alternately.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an electrical configuration of a film scanner.

FIG. 2 shows the relationship between a line sensor and a photographic film.

FIG. 3 illustrates an example of an imaging device with a light separation function.

FIG. 4 illustrates an example of an imaging device with a light separation function.

FIG. 5 illustrates an example of an imaging device with a light separation function.

FIG. 6 illustrates an example of an imaging device with a light separation function.

FIG. 7 illustrates a relationship between surfaces of prisms included in the imaging device with a light separation function in FIG. 6;

FIG. 8 illustrates an example of an imaging device with a light separation function.

FIG. 9 illustrates an example of an imaging device with a light separation function.

FIG. 10 illustrates an example of an imaging device with a light separation function.

FIG. 11 illustrates an example of an imaging device with a light separation function.

[Explanation of symbols]

 13 Photo film 15 Imaging device with light separation function 23, 24 Line sensor 25 Separation prism

Claims (30)

[Claims] 1. An optical image representing a target image is incident through an imaging optical system, and an incident surface perpendicular to an optical axis of the imaging optical system, a part of incident light incident from the incident surface is transmitted, and A first beam splitter surface that reflects light, transmits a portion of the incident light, and reflects a second beam splitter surface that reflects the other light, and reflects light transmitted through the first beam splitter surface. A first reflecting surface, a second reflecting surface that further reflects the reflected light reflected on the first reflecting surface and the reflected light reflected on the second beam splitter surface, and emits the light through the first emitting surface; A third reflecting surface for reflecting light transmitted through the second beam splitter surface, a reflected light reflected on the third reflecting surface, and the first reflecting surface;
And a fourth reflecting surface which further reflects the reflected light reflected by the beam splitter and emits the light through the second light emitting surface, from which the light incident from the light incident surface is emitted through the first light emitting surface. A separating prism having a first optical distance equal to a second optical distance until the light emitted from the incident surface exits through the second emitting surface, is fixed to the separating prism, and the second reflection is performed. A plurality of photoelectric conversion elements are arranged in a line at an image forming position of light reflected from the surface, and a filter that allows transmission of blue light and a filter that allows transmission of red light are provided on the light receiving surface of the photoelectric conversion element. First and second line sensors alternately formed for red and blue, and an image forming position of reflected light from the fourth reflecting surface fixed to the separating prism in parallel with the first line sensor. Placed in And green solid-state electronic image sensing device in which the filter which allows the transmission of light having a second line sensor, for green which is formed on the light receiving surface. 2. The first beam splitter surface transmits a red and blue light component and reflects a green light component, and the second beam splitter surface transmits a green light component. The solid-state electronic imaging device according to claim 1, wherein the solid-state electronic imaging device transmits light and reflects red and blue light components. 3. The solid-state electronic imaging device according to claim 2, wherein a filter that allows transmission of green light from the second line sensor is removed. 4. The first beam splitter surface transmits a green light component and reflects red and blue light components, and the second beam splitter surface has a red and blue light component. The first line sensor is fixed to the separation prism, and is disposed at an image forming position of the light emitted from the second reflection surface. And a filter that allows transmission of green light is a green line sensor formed on a light receiving surface, and the second line sensor is a first line sensor.
The fourth prism is fixed to the separation prism in parallel with the sensor.
A plurality of photoelectric conversion elements are arranged in a row at an image forming position of light emitted from the reflection surface of the light-emitting element, and a filter allowing transmission of blue light and a filter allowing transmission of red light on a light-receiving surface of the photoelectric conversion element 2. The solid-state electronic imaging device according to claim 1, wherein the red and blue line sensors are alternately formed. 5. The solid-state electronic imaging device according to claim 4, wherein a filter that allows transmission of green light is removed from the first line sensor. 6. An optical image representing a target image is incident through an imaging optical system, and an incident surface perpendicular to an optical axis of the imaging optical system, a part of incident light incident from the incident surface is transmitted, and others are transmitted. A beam splitter surface for reflection, a first reflection surface for reflecting light transmitted through the beam splitter surface, and a second light for further reflecting the light reflected on the first reflection surface and exiting through the first emission surface. And a third reflecting surface for further reflecting the light reflected on the beam splitter surface and emitting the light through a second emitting surface. The light incident from the incident surface is reflected on the first emitting surface. A first optical distance until the light exits through the incident surface and a second optical distance until the light exiting from the incident surface exits through the second exit surface, and is fixed to the separating prism; The second A plurality of photoelectric conversion elements are arranged in a row at an image forming position of light emitted from the reflection surface of the light-emitting element, and a filter allowing transmission of blue light and a filter allowing transmission of red light on a light-receiving surface of the photoelectric conversion element Are alternately formed on the first line sensor for both red and blue, and fixed to the separating prism in parallel with the first line sensor, and coupled to the light emitted from the third reflecting surface. A solid-state electronic imaging device, comprising: a second line sensor for green having a filter disposed on an image position and formed on a light receiving surface and allowing transmission of green light. 7. The solid-state electronic imaging device according to claim 6, wherein the beam splitter surface transmits red and blue light components and reflects a green light component. 8. The solid-state electronic imaging device according to claim 6, wherein a filter that allows transmission of green light is removed from the second line sensor. 9. The beam splitter surface transmits a green light component and reflects red and blue light components, and the first line sensor is fixed to the separation prism, A green line sensor formed on a light receiving surface and having a filter disposed at an image forming position of light emitted from the second reflecting surface and allowing transmission of green light; Are fixed to the separation prism in parallel with the first line sensor, a plurality of photoelectric conversion elements are arranged in a line at an image forming position of light emitted from the third reflection surface, and the photoelectric conversion elements 7. The solid-state electronic imaging device according to claim 6, wherein a filter that allows transmission of blue light and a filter that allows transmission of red light are alternately formed on a light receiving surface of the solid-state electronic device. apparatus. 10. The solid-state electronic imaging device according to claim 9, wherein a filter that allows transmission of green light from the first line sensor is removed. 11. The solid-state electronic imaging device according to claim 6, wherein an angle between the incident surface and the beam splitter surface is 45 degrees or 60 degrees. 12. An optical image representing a target image is incident through an imaging optical system, and a first incident surface and a second incident surface formed symmetrically with respect to an optical axis of the imaging optical system; A first beam splitter surface that transmits a part of incident light incident from the incident surface and reflects the other, and transmits a part of the incident light incident from the second incident surface and reflects the other. A first exit surface for guiding reflected light from the second beam splitter surface, the first beam splitter surface, and transmitted light from the second beam splitter surface to the outside;
The reflected light from the beam splitter surface of the
A second exit surface for guiding the transmitted light of the splitter surface to the outside, and a second exit surface until the light incident from the first entrance surface and the second entrance surface exits through the first exit surface. 1
A separation prism having an optical distance equal to a second optical distance until light incident from the first incidence surface and the second incidence surface exits through the second emission surface. A first green line formed on a light receiving surface and having a filter fixed to a prism, arranged at an image forming position of light emitted from the first light emitting surface, and formed on the light receiving surface;
A plurality of photoelectric conversion elements arranged in a line at an imaging position of light emitted from the second emission surface, the plurality of photoelectric conversion elements being fixed to the separation prism in parallel with the sensor and the first line sensor; A solid-state electronic imaging device comprising a second line sensor for both red and blue in which a filter allowing transmission of blue light and a filter allowing transmission of red light are alternately formed on the light receiving surface of the element. . 13. The photoelectric conversion device according to claim 1, wherein the first line sensor is fixed to the separation prism, a plurality of photoelectric conversion elements are arranged in a line at an imaging position of light emitted from the second emission surface, and A second line sensor for red and blue, wherein a filter allowing transmission of blue light and a filter allowing transmission of red light are alternately formed on a light receiving surface of the conversion element; Is the first line
The first prism is fixed to the separation prism in parallel with the sensor.
13. The solid-state electronic imaging device according to claim 12, wherein a filter is disposed at an image forming position of light emitted from the light exit surface of the light emitting device, and a filter for allowing transmission of green light is a line sensor for green formed on a light receiving surface. apparatus. 14. An angle between the first entrance surface and the second exit surface and at least one of an angle between the first exit surface and the second entrance surface is 1 degree to 3 degrees. 13. The solid-state electronic imaging device according to claim 12, which is in a range. 15. A light image representing a target image is incident through an imaging optical system, and an incident surface perpendicular to an optical axis of the imaging optical system is provided.
A first reflecting surface for reflecting light incident from the incident surface, and reflecting a part of light reflected on the first reflecting surface;
A first beam splitter surface transmitting the others, a second reflection surface parallel to the first reflection / transmission surface, and reflecting light transmitted through the first beam splitter surface; The second beam splitter surface, which transmits the reflected light reflected on the splitter surface and further reflects the reflected light reflected on the second reflecting surface, is parallel to the second beam splitter surface, and is parallel to the second beam splitter surface. A third reflecting surface for reflecting the transmitted light of the beam splitter surface of
The reflected light reflected on the beam splitter surface and the reflected light reflected on the third reflecting surface are further reflected respectively, and the first emitted light and the second
A separating prism having a fourth reflecting surface for emitting as the outgoing light of the light source, wherein the optical distance of the first outgoing light is equal to the optical distance of the second outgoing light of the light incident from the incident surface. A first line sensor for green, which is fixed to the separating prism, is disposed at the image forming position of the first emitted light, and has a filter formed on a light receiving surface, the filter allowing transmission of green light; A plurality of photoelectric conversion elements are arranged in a row at an image forming position of the second outgoing light, and are fixed to the separation prism in parallel with the first line sensor. A solid-state electronic imaging device, comprising: a second line sensor for both red and blue in which filters allowing transmission of red and blue are alternately formed. 16. The first beam splitter surface,
The second beam splitter surface reflects the red and blue light components and transmits the green light component, and reflects the green light component and transmits the red and blue light components. 16. The solid-state electronic imaging device according to claim 15, wherein: 17. The solid-state electronic imaging device according to claim 16, wherein a filter that allows transmission of green light from the first line sensor is removed. 18. The method according to claim 18, wherein the first beam splitter surface is
The second beam splitter surface reflects the green light component and transmits the red and blue light components, and reflects the red and blue light components and transmits the green light component. The first line sensor is fixed to the separation prism, a plurality of photoelectric conversion elements are arranged in a line at an image forming position of the first outgoing light, and a blue light-receiving surface of the photoelectric conversion element A red and blue line sensor in which filters permitting the transmission of red light and filters permitting the transmission of red light are alternately formed, and the second line sensor is used for the first line sensor. A green line sensor fixed to the separation prism in parallel with the sensor, arranged at the image forming position of the second emitted light, and formed on a light receiving surface with a filter allowing transmission of green light. Claim 15 Solid-state electronic image sensing device. 19. The solid-state electronic imaging device according to claim 18, wherein a filter that allows transmission of green light from the second line sensor is removed. 20. A light image representing a target image is incident through an imaging optical system, and an incident surface perpendicular to the optical axis of the imaging optical system;
A first beam splitter surface that transmits a part of the light incident from the incident surface and reflects the other, and is parallel to the first beam splitter surface and transmitted through the first beam splitter surface. A first reflection surface for reflecting light, a light reflected on the first beam splitter surface is transmitted, and a light reflected on the first reflection surface is further reflected as first emission light through an emission surface. Second to emit
The beam splitter surface is parallel to the second beam splitter surface, reflects the light refracted on the first beam splitter surface, and transmitted through the second beam splitter surface, and emits the light. A second reflecting surface that emits as the second outgoing light through the surface; and of the light incident from the incident surface, the optical distance of the first outgoing light and the optical distance of the second outgoing light. Are fixed to the separation prism, and a plurality of photoelectric conversion elements are arranged in a line at an image forming position of the first outgoing light. A first line sensor for red and blue alternately formed with a filter permitting the transmission of blue light and a filter permitting the transmission of blue light, and fixed to the separation prism in parallel with the first line sensor; Disposed at an imaging position of the second outgoing light,
And a second line sensor for green in which a filter allowing transmission of green light is formed on a light receiving surface. 21. The first beam splitter surface,
The second beam splitter surface transmits the red and blue light components and reflects the green light component, and transmits the green light component and reflects the red and blue light components. 21. The solid-state electronic imaging device according to claim 20. 22. The solid-state electronic imaging device according to claim 21, wherein a filter that allows transmission of green light from the second line sensor is removed. 23. The first beam splitter surface,
The second beam splitter surface transmits the green light component and reflects the red and blue light components, and transmits the red and blue light components and reflects the green light component. The first line sensor is fixed to the separation prism, is disposed at an image forming position of the first outgoing light, and has a filter for allowing transmission of green light formed on a light receiving surface. Line sensor, the second
Are fixed to the separation prism in parallel with the first line sensor, a plurality of photoelectric conversion elements are arranged in a line at an imaging position of the second emitted light, and the photoelectric conversion element A red and blue line sensor in which a filter allowing transmission of blue light and a filter allowing transmission of red light are alternately formed on the light receiving surface of
21. The solid-state electronic imaging device according to claim 20. 24. The solid-state electronic imaging device according to claim 23, wherein a filter that allows transmission of green light from the first line sensor is removed. 25. A light image representing a target image is incident through an imaging optical system, and an incident surface perpendicular to an optical axis of the imaging optical system;
A beam splitter surface that transmits a part of the light incident from the incident surface and reflects the other light, reflects light transmitted through the beam splitter surface, and emits as a first emission light through a first emission surface. The first reflecting surface, the beam
A second reflecting surface that reflects the light reflected on the splitter surface and emits as the second outgoing light through the second outgoing surface, and optically converts the first outgoing light out of the light incident from the incident surface. A separation prism having a distance equal to the optical distance of the second emission light, fixed to the separation prism, disposed at an image forming position of the first emission light, and transmitting a green light component on a light receiving surface; A first line sensor for green on which an allowable filter is formed, and a plurality of photoelectric conversion elements which are fixed to the separation prism, are arranged in a row at an image forming position of the second outgoing light, and A solid-state electronic imaging device comprising: a second line sensor for both red and blue in which a filter allowing transmission of blue light and a filter allowing transmission of red light are alternately formed on the light receiving surface of the element. . 26. The solid-state electronic imaging device according to claim 25, wherein the beam splitter surface reflects red and blue light components and transmits a green light component. 27. The solid-state electronic imaging device according to claim 26, wherein a filter that allows transmission of green light is removed from the first line sensor. 28. The beam splitter according to claim 26, wherein said beam splitter surface reflects a green light component and transmits red and blue light components, and said first line sensor is connected to said first line sensor. A filter fixed in parallel to the separation prism, a plurality of photoelectric conversion elements arranged in a line at an image forming position of the first emission light, and a filter allowing transmission of blue light on a light receiving surface of the photoelectric conversion element; A line sensor for red and blue alternately formed with a filter allowing transmission of red light, wherein the second line sensor is connected to the separation prism in parallel with the first line sensor. 26. The solid-state image sensor according to claim 25, wherein the filter is fixed, is disposed at the image forming position of the second emitted light, and is a green line sensor formed on a light receiving surface, the filter being configured to allow transmission of green light. Electronic imaging device. 29. The solid-state electronic imaging device according to claim 28, wherein a filter that allows transmission of green light from the second line sensor is removed. 30. A birefringent plate which receives a light image representing a target image through an imaging optical system and splits the incident light beam into a first light beam and a second light beam each representing a target image, and the first light beam A filter which is disposed at the image forming position of the image represented by the symbol and which transmits green light on the light receiving surface.
A plurality of photoelectric conversion elements are arranged in a line at an image forming position of an image which is parallel to the first line sensor and the second light ray, and the light receiving elements of the photoelectric conversion elements A solid-state electronic imaging device comprising: a second line sensor for both red and blue in which a filter allowing transmission of blue light and a filter allowing transmission of red light are alternately formed on a surface.