JPH10136176A - Image input device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To use the same lighting optical system for both of a reflection original and a transparent original with no adjustment by using a 1st reflection mirror that reflects a luminous flux along a light source optical axis backward and a 2nd reflection mirror that reflects the luminous flux forward. SOLUTION: A 1st concave mirror 10 placed with a tilt on an optical axis 8 of a light source system consisting of a rear concave reflecting mirror 2, a light source lamp 4 and a 1st condenser lens 6 reflects a luminous flux from the light source backward. A 2nd concave mirror 14 placed with a tilt on an optical axis of the reflected luminous flux reflects the luminous flux forward in front of an image pickup optical axis. An R holding frame 30 is placed just before the 2nd concave mirror 14 placed with a tilt and an image pickup lens 20 and a P support frame 32 are placed in front of an image pickup element 22. A reflection original R supported by an R holding frame 30 is lighted with the 1st concave mirror 10 placed with a tilt from the front side obliquely and no flair due to the light is caused. When no reflection original R is placed, the luminous flux reflected in the 2nd concave mirror 14 placed with a tilt passes through a transparent original P loaded to the P support frame 32.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image input device using a solid-state image pickup device such as a CCD for imaging a transmission type original such as a photographic film and a reflection type original such as a photographic print.
In particular, the present invention relates to an image input device which can improve the illumination optical system so as to image a transmission original and a reflection original without moving the illumination optical system. The video signal obtained by the imaging by the image input device is input to the electronic viewer of the display device to view and check the photographic image,
Input to the printer. In this specification, the term “rear” indicates a direction opposite to the image sensor when the image pickup lens is used as a reference, and the term “forward” indicates a direction on the same side as the image sensor when the image pickup lens is used as a reference.

[0002]

2. Description of the Related Art JP-A-4-320168 and JP-A-6-350913 disclose a transmission type original of a photographic negative film positive film or a reflection type original such as a printed photograph by a light source, and an image picked up by the light source. There is disclosed an image input device in which an image is formed on a solid-state image sensor by a lens, converted into a video signal, and output. In this image input device, a light source lamp is supported by a rotating arm. Rotating the rotating arm rotates the rotating arm to position the light source lamp on the film stage, and rotating the rotating arm rotates the rotating arm to move the light source lamp diagonally forward of the reflective document table. Place and do. JP-A-6-3
743 also discloses an image input device, which has a fixed light source, and arranges a transmissive original and a reflective original at an angle of less than 90 degrees with respect to each other,
The transmissive original or the reflective original is illuminated by attaching and detaching the reflection member at a predetermined position.

[0003]

In the above three prior arts, a single light source is used to simplify the structure and reduce the manufacturing cost. But,
In order to switch between a transmissive original and a reflective original, in the image input apparatus disclosed in JP-A-4-320168 and JP-A-6-350913, the rotating arm must be rotated. In the image input device disclosed in JP-A-33743, the reflection member must be attached and detached. In order to be able to perform these operations, an increase in the size of the apparatus, an increase in manufacturing cost, and a complicated operation were inevitable.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art, and uses the same light source for both a transmissive original and a reflective original.
It is an object of the present invention to provide an image input apparatus capable of picking up an image of a illuminating optical system such as a reflecting member by simply loading a transmissive original or a reflective original without adjusting the movement of the optical system.

[0005]

According to a first aspect of the present invention, there is provided a light source provided on one side of an image pickup optical axis, and a light beam arranged along the other side of the image pickup optical axis and extending along the light source optical axis from the light source. A first reflecting mirror that receives light and reflects backward, and a second reflecting mirror that is arranged on the imaging optical axis and receives the light beam from the first reflecting mirror and reflects forward
A reflecting mirror, an imaging lens arranged in front of the second reflecting mirror on the imaging optical axis, and an imaging element arranged in front of the imaging lens; A reflection type document holding unit disposed between the light source optical axis and a transmission type document holding unit disposed between the light source optical axis and the imaging lens on the imaging optical axis; When a reflective original is loaded in the holding means, the reflected light from the first reflecting mirror is incident on the reflective original holding means, and when the reflective original is not loaded in the reflective original holding means, An image input apparatus characterized in that reflected light from the second reflecting mirror is incident on the transmission type document holding means.

According to a second aspect of the present invention, there is provided a light source provided on one side of an imaging optical axis, and a light source arranged on the other side of the imaging optical axis, receiving a light beam from the light source along the light source optical axis, and receiving the light beam on the rear side. A first reflecting mirror that reflects light, a second A reflecting mirror that is arranged on the same side as the light source with respect to the imaging optical axis, receives a light beam from the first reflecting mirror, and reflects the light in a direction orthogonal to the imaging optical axis; A second B reflecting mirror arranged on the optical axis to reflect the light beam from the second A reflecting mirror along the imaging optical axis, an imaging lens arranged in front of the second reflecting mirror on the imaging optical axis, and the imaging A reflection type document holding means disposed between the light source optical axis and the second B reflecting mirror on an image pickup optical axis, comprising: an image pickup element disposed in front of a lens; A transmission type document holding means disposed between a shaft and the image pickup lens is provided, and a reflection type document holding means is provided opposite to the reflection type document holding means. When the original is loaded, the reflected light from the first reflecting mirror is incident on the reflective original holder, and when the reflective original is not loaded in the reflective original holder, the second B An image input apparatus characterized in that light reflected from a reflecting mirror is incident on the transmission type document holding means.

According to a third aspect of the present invention, there are provided a plurality of light sources provided on both sides of an imaging optical axis and illuminating rearward, a concave mirror disposed at a position behind the light source on the imaging optical axis and illuminated by the light source, and An imaging lens arranged in front of the concave mirror, having an imaging element arranged in front of the imaging lens, and a reflection type document holding means arranged between the light source and the concave mirror on an imaging optical axis; A transmission-type original holding unit disposed between the concave mirror and the imaging lens on the imaging optical axis; and when the reflection-type original is loaded in the reflection-type original holding unit, illumination from the light source is performed. Light is incident on the reflection type document holding means, and when the reflection type document is not loaded in the reflection type document holding means, reflected light from the concave mirror is incident on the transmission type document holding means. An image input device.

[0008]

According to the present invention configured as described above,
Since the same light source is used and it is mounted stationary, the whole image input device has the advantages of being compact, simple in structure and low in manufacturing cost. Further, there is no need to move and operate the illumination optical system only by loading a transmissive original and a reflective original, so that there is an advantage that the operation is excellent.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An image input apparatus according to an embodiment of the present invention will be described below with reference to the drawings. [First Embodiment] An optical system of an image input apparatus according to a first embodiment includes:
As shown in FIG. 1, a light source lamp 4 having a rear concave reflecting mirror 2, a first condenser lens 6 disposed in front of the light source lamp 4, and a light source light of the first condenser lens 6 opposed to the first condenser lens 6. The first oblique concave mirror 10 disposed on the axis 8, the second oblique concave mirror 14 disposed on the reflected optical axis 12 of the first oblique concave mirror 10, the reflected optical axis of the second oblique concave mirror 14, that is, the imaging light Imaging lens 20 arranged on axis 16
And an image sensor 22. On the imaging optical axis 16,
As shown in FIG. 2, an R holding frame 30 for a reflection type original R is disposed immediately before the second oblique concave mirror 14, and as shown in FIG. A P holding frame 32 for the transmissive original P is disposed between the lens and the lens 20. The reflection type document R is illuminated diagonally from the front by the first oblique concave mirror 10, and the first oblique concave mirror 1 of the illuminating light beam is used.
The specular reflection due to 0 does not enter the imaging lens 20, and no flare occurs due to the illumination light beam. The imaging lens 20 is controlled by a known automatic focusing unit (not shown) that detects whether the reflection type document R or the transmission type document P is inserted and focuses on each of them.

The image sensor 22 is a one-dimensional CCD or a two-dimensional CCD. In the case of a one-dimensional CCD image sensor 22,
An image is captured by scanning the image sensor 22 in a direction orthogonal to the optical axis. In the case of a two-dimensional CCD image sensor 22,
Images are captured while the imaging element 22 is fixed. The curvature of the first oblique concave mirror 10 is determined such that the light source image is formed in front of the reflective original. Second oblique concave mirror 1
4 is determined such that the light source image is formed in the publication of the transmission type original. By making such a determination, the original can be efficiently and uniformly illuminated.
In the image input apparatus of the first embodiment, as shown in FIG. 3, a liquid crystal display section 42 is mounted on a top surface of a housing 40 by a hinge 44, and a reflection type document R insertion port 50 and a transmission type A document P insertion port 48 is provided, and a print paper discharge port 54 is provided on the side surface 52 of the housing 40.
Is provided. The reflection type document R insertion slot 50 is configured to be compatible with the print 61. The transmissive original P insertion port 48 is configured to be compatible with the film 62 mounted on the film mount 60 and the APS film cartridge 64.

Next, the operation of the image input device according to the first embodiment having the above-described configuration will be described. When imaging the transmission original P, as shown in FIG. 1, the transmission original P mounted on the film mount 60 or contained in the APS film cartridge 64 is inserted into the P holding frame 32 through the transmission original P insertion port 48. Then, the light source lamp 4 is turned on. Light source lamp 4
Is condensed by the first condenser lens 6, is reflected by the first oblique concave mirror 10 and the second oblique concave mirror 14, and illuminates the transmissive original P from behind. The transmissive original P illuminated from behind is imaged on the imaging element 22 by the imaging lens 20 and is imaged. The captured image of the transmissive original P is displayed on the liquid crystal display unit 42, printed by a printer (not shown) if desired, and discharged from the print discharge port 54. When imaging the reflection type document R, the reflection type document R such as a print is inserted into the R holding frame 30 through the reflection type document R insertion slot 50 and the light source lamp 4 is turned on.
Lights up. As shown in FIG. 2, the light beam from the light source lamp 4 is condensed by the condenser lens 6, reflected by the first oblique concave mirror 10, and illuminates the reflection type document R from the front. The reflection type document R illuminated from the front is imaged on the image sensor 22 by the image pickup lens 20 and is imaged. The captured image of the reflection type original R is displayed on the liquid crystal display unit 42, printed by a printer (not shown) as required, and discharged from the print discharge port 54. The liquid crystal display section 42 may be provided independently of the housing 40.

Second Embodiment As shown in FIG. 4, the optical system of the image input apparatus of the second embodiment is almost the same as that of the first embodiment, and the same configuration as that of the first embodiment is the same. And the description is omitted. The illumination system according to the second embodiment includes:
As shown in FIG. 4, the second oblique concave mirror 14 of the first embodiment
With the second A plane mirror 100 and the second condenser lens 10
2 and the second B plane mirror 104. The second A plane mirror 100 is disposed on the same side as the light source lamp 4 with respect to the imaging optical axis 16, the reflection optical axis 110 of the second A plane mirror 100 is orthogonal to the imaging optical axis 16, and the second A plane mirror 100 and the imaging optical axis 16 The second condenser lens 102 is arranged between the first lens and the second lens. The second B plane mirror 104 is arranged on the imaging optical axis 16 and reflects the illumination light beam from the second condenser lens 102 along the imaging optical axis 16. An R holding frame 30 for a reflective original R is arranged at the intersection of the reflection optical axis 120 of the first concave mirror 10 and the imaging optical axis 16.

Third Embodiment As shown in FIG. 5, the optical system of the image input device according to the third embodiment has a rear concave reflecting mirror 200 disposed rearward on both sides of the imaging optical axis 16. A plurality of light source lamps 202, a concave mirror 210 disposed on the imaging optical axis 16 behind the light source lamp 202, an imaging lens 212 and an imaging element 214 disposed on the reflection optical axis of the concave mirror 210, that is, on the imaging optical axis 16. Having. An R holding frame 30 for a reflective original R is disposed on the imaging optical axis 16 immediately before the concave mirror 210, and a P-type original for the transmissive original P is located near the light source lamp 202 on the imaging optical axis 16.
The holding frame 32 is arranged. Since the reflection type document R is illuminated obliquely from the front by the plurality of light source lamps 202, the regular reflection of the illumination light flux from the light source lamps 202 by the reflection type document R does not enter the imaging lens 212.
No flare occurs due to the illumination light beam. Imaging lens 21
Reference numeral 2 is controlled by a known automatic focusing unit (not shown) that detects whether the reflection type document R or the transmission type document P is inserted and focuses on each of them.

[First Reference Configuration Example] As shown in FIG. 6, the optical system of the image input device of the first reference embodiment is almost the same as that of the first embodiment, and has the same configuration as that of the first embodiment. Are denoted by the same reference numerals and description thereof will be omitted. The illumination system of the second configuration example is configured by replacing the first oblique concave mirror 10 of the first embodiment with a plane mirror 300, as shown in FIG. The reflection direction of the plane mirror 300 is variable in order to change the reflection direction between the case where the reflection type document R is directly illuminated and the case where the transmission type document P is illuminated via the second oblique concave mirror 14. [Second Reference Embodiment] The image input device of the second reference configuration example is as follows.
The configuration is almost the same as that of the first embodiment, and the same components as those of the first embodiment are denoted by the same reference numerals and the description thereof is omitted. In the illumination system of the second reference configuration example, the second oblique concave mirror 14 is configured as shown in FIG.
As shown in the figure, the same position as in the first embodiment shown by a solid line,
It is movable to and from a position inside the R holding frame 30 for the reflective original R. Further, the second oblique concave mirror 14 can be moved between the same position as in the first embodiment shown by the solid line and the use position of the R holding frame 30.

As shown in FIG. 8, the second reference configuration example is accommodated in a housing 400 similar to the housing 40 of the first embodiment shown in FIG. The housing 400 has a drawer 402 on which the second oblique concave mirror 14 is disposed and which can be taken in and out rearward. By moving the drawer 402 in and out, the second oblique concave mirror 14 is moved between the same position as in the first embodiment and the position inside the R holding frame 30 for the reflective original R, and at the same time, the housing 400 The opening / closing of the reflection type document R insertion port 48 provided on the front surface 46 of the camera is opened and closed.

[Brief description of the drawings]

FIG. 1 is an optical diagram of an image input apparatus according to a first embodiment of the present invention in a state where a transparent original is being imaged.

FIG. 2 is an optical diagram of the image input apparatus according to the first embodiment of the present invention in a state where a reflective original is being imaged.

FIG. 3 is a perspective view of the image input device according to the first embodiment of the present invention.

FIG. 4 is an optical diagram of an image input device according to a second embodiment of the present invention.

FIG. 5 is an optical diagram of an image input device according to a third embodiment of the present invention.

FIG. 6 is an optical diagram of an image input device according to a first configuration example of the present invention.

FIG. 7 is an optical diagram of an image input device according to a second configuration example of the present invention.

FIG. 8 is a perspective view of an image input device according to a second configuration example of the present invention.

[Explanation of symbols]

 R Reflective original P Transmissive original 2 Back concave reflector 4 Light source lamp 6 First condenser lens 8 Light source optical axis 10 First oblique concave mirror 12 Reflective optical axis 14 Second oblique concave mirror 16 Imaging optical axis 20 Imaging lens 22 Imaging Element 22 30 R holding frame 32 P holding frame 40 Housing 42 Liquid crystal display 48 Reflective document R insertion port 50 Transmission type document P insertion port 54 Print discharge port 61 Print

Claims (3)

[Claims] 1. A light source provided on one side of an imaging optical axis, and a first light source arranged on the other side of the imaging optical axis for receiving a light beam from the light source along the light source optical axis and reflecting the light beam backward. A reflecting mirror, a second reflecting mirror arranged on the imaging optical axis to receive the light beam from the first reflecting mirror and reflecting forward, and an imaging arranged in front of the second reflecting mirror on the imaging optical axis A lens; an image sensor disposed in front of the imaging lens; a reflection type document holding means arranged on the imaging optical axis between the second reflecting mirror and the light source optical axis; A transmission type document holding means disposed between the optical axis of the light source and the image pickup lens, and the first type of document when the reflection type document is loaded in the reflection type document holding means.
When the reflected light from the reflecting mirror is incident on the reflection type document holding means, and the reflection type document is not loaded in the reflection type document holding means, the reflection light from the second reflection mirror is reflected on the transmission type document holding means. An image input device, which is incident on the image input device. 2. A light source provided on one side of the imaging optical axis, and a light source arranged on the other side of the imaging optical axis for receiving a light beam from the light source along the light source optical axis and reflecting the light beam backward. 1 reflecting mirror, and the first mirror disposed on the same side as the light source with respect to the imaging optical axis.
A second A reflecting mirror that receives a light beam from the reflecting mirror and reflects the light beam in a direction orthogonal to the imaging optical axis; and a second A reflecting mirror that is arranged on the imaging optical axis and reflects the light beam from the second A reflecting mirror along the imaging optical axis. A 2B reflecting mirror, an imaging lens disposed in front of the second reflecting mirror on the imaging optical axis, and an imaging element disposed in front of the imaging lens. A reflection type document holding means disposed between the second B reflecting mirror and a transmission type document holding means disposed between the light source optical axis and the imaging lens on an imaging optical axis; When a reflective original is loaded in the original holding means, the first
When the reflected light from the reflecting mirror is incident on the reflection type document holding means and the reflection type document is not loaded in the reflection type document holding means, the reflection light from the second B reflecting mirror is reflected on the transmission type document holding means. An image input device, which is incident on the image input device. 3. A plurality of light sources provided on both sides of an imaging optical axis and illuminating backward, a concave mirror disposed at a position behind the light source on the imaging optical axis and illuminated by the light source, and a front of the concave mirror An imaging lens disposed in front of the imaging lens, a reflection type document holding unit disposed between the light source and the concave mirror on an imaging optical axis, and an imaging optical axis. A transmission type document holding means disposed between the concave mirror and the imaging lens, and when a reflection type document is loaded in the reflection type document holding means, illumination light from the light source is reflected. An image input device, wherein the reflected light from the concave mirror is incident on the transmission type document holding means when the reflection type document is not loaded on the reflection type document holding means. .