JPH0346875A - Electronic still camera - Google Patents

Abstract

PURPOSE:To obtain single-lens reflex constitution without using any quick-return mirror by moving an image pickup element into and out of the luminous flux of a lens. CONSTITUTION:A CCD 14 is arranged outside the image pickup luminous flux path of the lens 11 when not used. Subject light which is made incident from the lens 11 therefore passes through a field lens 16, a mirror 17, a relay lens 19, and a mirror 20 to form its image on an image re-formation plane 21. Consequently, this image can be monitored through a magnifying lens 22. When a release switch 35 is turned on, a system controller 33 drives a stop 12 through a driving mechanism 13 and sets a calculated stop value As, moves the CCD 14 into the luminous flux path, and drives a spindle motor 30 through a spindle servo circuit 32 to rotates a magnetic disk 29.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an electronic still camera that records an image of a subject on a recording medium such as a magnetic disk.

[Conventional technology]

FIG. 2 is a block diagram showing the configuration of an example of a conventional electronic still camera of a so-called single-lens reflex type.

In the same figure, 1 is a lens, and a subject (not shown)
The light from the image sensor 2 is incident on the image sensor 2. A quick return mirror 3 reflects the light from the lens 1 and makes it enter the finder 5. 4 is a shift mechanism 1, which drives the quick return mirror 3; Reference numeral 6 denotes a mirror rotatably attached to the rear of the mirror 3, and allows a portion of the imaging light beam to enter the optical element 7.

When the release switch (not shown) is not turned on, the quick return mirror 3 is located at the position indicated by the solid line in the figure.゛Thus, the light incident from the lens 1 is reflected by the quick return mirror 3, and the light enters the finder 5.
Since the light is incident on the object, the object can be monitored through the finder 5, quick return mirror 3, and lens 1.

Also, at this time, the light transmitted through the quick return mirror 3 composed of a half mirror is reflected by the mirror 6,
The light is incident on the photometric element 7. Thereby, the aperture value of the aperture, the shutter speed, etc. can be calculated from the output of the photometric element 7.

When the release switch is turned on, the shift mechanism 4 moves the quick return mirror 3 and the mirror 6 upward (
(to the position indicated by the broken line in the figure).

Thereby, light from the lens 1 is incident on the image sensor 2, and its output can be recorded on a recording medium such as a magnetic disk.

After the imaging is completed, the quick return mirror 3 is returned to its original position.

[Problem to be solved by the invention]

In this way, in the conventional single-lens reflex electronic still camera, the quick return mirror 3 is arranged between the lens 1 and the +i image element 2, so that the rear surface of the lens 1 and the imaging position (imaging element The distance from the position where 2 is placed! (
The amount of back focus had to be increased, and as a result, it was necessary to use a large lens 1.

Furthermore, by reducing the shape of the quick return mirror 3, the amount of back focus can be reduced to some extent, but this will reduce the amount of light incident on the finder 5 and reduce the brightness. cannot be made too small.

For this reason, Tanabe decided to downsize single-lens reflex electronic still cameras.

This invention was made in view of this situation,
The present invention provides an electronic still camera that can be miniaturized.

[Means to solve the problem]

The electronic still camera of this invention has a lens that transmits light for photographing a subject, and a camera that receives light transmitted through the lens.
The image sensor includes an image sensor, a recording means for recording the output of the image sensor on a recording medium, and a moving means for moving the image sensor between a position where light transmitted through the lens is incident and a position where light is not incident.

[Effect]

In the electronic still camera configured as described above, an image sensor such as a CCD is placed in the path of the light beam incident through the lens during photographing, and is placed outside the path of the light beam when not photographing. This makes it possible to directly guide the light incident from the lens to the finder or the like when not photographing.

Therefore, a quick return mirror becomes unnecessary, and a compact electronic still camera can be realized.

〔Example〕

FIG. 1 is a block diagram showing the configuration of an embodiment of an electronic still camera of the present invention.

In the figure, 11 is a lens, which focuses light from a subject (not shown). Reference numeral 12 denotes an aperture, which is driven to a predetermined aperture value by an aperture driver MIt13. 14 is a CCD as an image sensor, into which light from the lens 11 is incident. 15 is a shift mechanism as a means of movement;
Move the shooting aS child 14.

16 is a field lens, 17 is a mirror, 19 is a relay lens, 20 is a mirror, 21 is a re-imaging surface, and 22 is a magnifying lens, and these constitute an optical finder 38.

Reference numeral 18 denotes a photometric element into which the light transmitted through the mirror (half mirror in this embodiment) 17 is incident, and its output is input to the photometric circuit 23 .

A drive circuit 24 drives the CCD 14 and supplies its output to the processing circuit 25. A recording circuit 26 supplies the output of the processing circuit 25 to the magnetic head 27.

A head moving mechanism 28 moves the magnetic head 27 to a predetermined track on the magnetic disk 29. A spindle motor 30 rotates the magnetic disk 29. 31 is a detection coil, which connects the magnetic disk 29 to the PG
Detects and outputs pulses. A spindle servo circuit 32 controls the spindle motor 30.

A system controller 33 includes, for example, a microcomputer, and controls each circuit, means, and the like. 34
is the power switch, which is operated to turn on and off the sub-source. 35 is a release switch, which is turned on when taking an image. In addition, 36 is a switch that is operated when performing a predetermined operation. A display element 37 displays information necessary for imaging.

Next, its operation will be explained with reference to the timing chart of FIG.

When the power switch 34 is turned on, necessary power is supplied to each circuit 5 means, etc. Also, at this time, the system controller 33 drives the drive mechanism 13 to fully open the diaphragm 12, which had been closed until then (see FIG. 3(a)).
, (C)).

Of course, conversely, it is also possible to leave the diaphragm 12 fully open when not in use (when the power is off), and leave it fully open when in use (when the power is on).6 However, it is also possible to leave the aperture 12 fully open when not in use. Since a mechanical shutter is not provided, strong light may be inadvertently incident on the CCD 14, which may cause deterioration. Therefore, as in the embodiment, it is preferable to leave it fully open when not in use.

Further, at this time, the CCD 14 is placed at a position shown by a solid line in FIG. 1, that is, outside the imaging light beam path of the lens 11. Therefore, the light of the object that enters from the lens 11 is imaged on the re-imaging surface 21 via the field lens 16, mirror 17, relay lens 19, and mirror 20. As a result, this image can be monitored through the magnifying glass 22.

Further, a part of the light emitted from the field lens 16 passes through the mirror 17 and enters the photometric element 18 .

The photometric circuit 23 subjects the output of the photometric element 18 to the processing necessary to calculate the exposure amount, and then outputs the output to the system controller 33 . The system controller 33 calculates an appropriate aperture value As of the diaphragm 12 and an operating time Ts of the electronic shutter of the CCD 14 from the input data (see FIG. 3(e)).
).

Next, when the release switch 35 is turned on, the system controller 33 drives the aperture 12 via the drive mechanism 13 to set the calculated aperture value As (Fig. 3(b)
), (c)) Furthermore, the system controller 33 controls the shift mechanism 15 to move the CCD 14, which had been placed outside the light beam path of the lens 11, into the light beam path, and also moves the CCD 14 through the spindle servo circuit 32. The spindle motor 30 is driven to rotate the magnetic disk 29 (FIGS. 3(d) and 3(f)). At this time, the spindle servo circuit 32 receives the F input from the spindle motor 30.
Using the G pulse and the PG pulse input from the detection coil 31, the spindle motor 30 is controlled so that the number of rotations of the magnetic disk 29 is constant.

Further, when the aperture 12 is set to an appropriate value, the system controller 33 controls the CCD 14 via the drive circuit 24.
is controlled, and charges corresponding to the light from the lens 11 are accumulated for a time Ts. In other words, the electronic shutter is activated for a time T
s is operated (Fig. 3 (g)).

When time Ts has elapsed, the charges accumulated in the CCD 14 are read out and input to the processing circuit 25 (Fig. 3 (h
)). The video signal that has undergone the necessary processing in the processing circuit 25 is input to the recording circuit 26, where it is FM modulated. At this time, since the gate pulse (FIG. 3(i)) is input to the recording circuit 26, the FM modulation signal is output to the magnetic head 27 and recorded on one track of the magnetic disk 29.

After the recording is completed, the system controller 33 controls the head moving mechanism 28 to move the magnetic head 27 to one inner track. Further, the aperture 12 is fully opened, the CCD 14 is retracted out of the optical path, and the rotation of the magnetic disk 29 is stopped (FIGS. 3(c) and 3(d),
(f)).

Thereafter, in preparation for the first photographing, the aperture As and time Ts are calculated (FIG. 3(e)).

When the power switch 34 is turned off, the aperture 12 is closed and photometry is also stopped (Fig. 3 (a), (c), (e)).
).

Note that since the CCD 14 is shifted at the imaging position I by the lens 11, the amount of shift is smaller than that in the case of a quick return mirror.

FIGS. 4 and 5 show the configuration of an embodiment of an electronic still camera according to the present invention in which an optical low-pass filter is used.

In the embodiment of FIG. 4, an optical low pass filter (
A crystal optical filter 41 is fixed in the light beam path of the lens 11, and in the embodiment shown in FIG. It is designed to be moved both up and down within the plane.

In the embodiment shown in FIG. 4, since the optical low-pass filter 41 is fixed, there is an advantage that the load on the shift mechanism 15 is lighter than in the case shown in FIG.

In addition, in the embodiment shown in FIG. 4, the light that has passed through the optical low-pass filter 41 enters the optical finder 38 as it is, so the image is viewed through the optical low-pass filter 41, and theoretically the image is Although it will appear multiple,
Since this is a case in the microscopic range, there is almost no problem in practical terms.

On the other hand, in the embodiment shown in FIG. 5, the optical low-pass filter 41 can be placed close to the CCD 14.
It can be made smaller than the case shown in FIG. Furthermore, since the optical low-pass filter 41 is placed outside the light beam path when not photographing, the object can be monitored using the optical finder 38 without using the optical low-pass filter 41.

Furthermore, in both embodiments, an optical low-pass filter 41 is placed in front of the CCD 14, so that
The occurrence of moire can be prevented.

Note that the moving direction of the CCD 14, the optical low-pass filter 41, etc. does not necessarily have to be perpendicular to the optical axis of the light from the lens 11. In addition, CC014 etc. have lens 11
It is also possible to reflect the light from the mirror in a predetermined direction with a mirror and move it forward and backward along the reflected optical path.

6 and 7 show other embodiments of the optical finder 38. FIG.

In the embodiment shown in FIG. 6, a pentaprism 4 is used instead of the relay lens 19 and mirror 20 in the embodiment shown in FIG.
2 is used.

On the other hand, in the embodiment of FIG.
The mirror 20 is omitted, and the optical finder 38 is formed linearly so as to be coaxial with the optical axis of the lens 11.

FIG. 8 shows the configuration of an interline type COD.

In the figure, 51 is a photodiode constituting each pixel, 52 is a vertical transfer COD, and 53 is a horizontal transfer COD. Further, 54 is a drain drain.

When the charge accumulated in the photodiode 51 constituting each pixel is an unnecessary charge, the charge is transferred to the adjacent vertical transfer CCD 52 and then sent to the drain drain 54.
transferred to and thrown away.

On the other hand, the necessary charge is transferred to the horizontal transfer CCD 53 and further read out from there.

As the CCD 14, such an interline type CCD
When using the processing circuit 2, as shown by the broken line in FIG.
5 and the system controller 33, the A/D converter 5
8 and the image memory 59 can be connected to perform the operation shown in the timing chart of FIG.
transitions from the fully open state to the fully open state (Fig. 9(a), (
C)).

After that, when the release switch 35 is turned on (91st
ffl(b)), the magnetic disk 29 is rotated (FIG. 9(f)), and the aperture As and electronic shutter time Ts are calculated from the output of the optical circuit 23 (FIG. 9(f)). e)).When this calculation is completed, the CCD 14
is entered from outside the beam path of the lens 11 into the beam path, and the aperture 12 is driven in accordance with this calculation result (
Figure 9(c),(d)).

Further, in synchronization with the vertical synchronization signal (FIG. 9(g)).

A high-speed sweep pulse P0 is input to the CCD 14, and unnecessary charges are swept out from the vertical transfer CCD 52 and sent to the drain 54.
will be forwarded to. Immediately thereafter, the pulse TG0 generated every field causes the charge accumulated in the photodiode 51 of each pixel to be transferred to the vertical transfer CCD.
52.

Subsequently, a pulse TO□ is generated a time Ts before the next pulse TO6 after one field, and the charge of the photodiode 51 is transferred to the vertical transfer CC'D52.

These charges are transferred to the sweep drain 54 as unnecessary charges by the next high-speed sweep pulse P2 (FIG. 9(h)). In this way, during the calculated time Ts,
Each ii! The charges accumulated in the photodiode 51 of the second element are vertically transferred C by the last pulse TO at time Ts.
The signal is transferred to the CD 52, and further transferred to the horizontal transfer CCD 53 by the read pulse Q1, where it is converted into a voltage.
The signal is input to the processing circuit 25 (FIGS. 9(h) and (i)).

After this video signal is processed by the processing circuit 25.

The image is A/D converted by an A/D converter 58 and stored in an image memory 59.

The system controller 33 calculates the operating time Tsi of the electronic shutter again from the data stored in the image memory 59. Then, the high-speed sweep pulses P3 and P4 output unnecessary charges to the sweep train 54, and the electronic shutter is operated again for this time Ts (FIG. 9(h)).

When this time Ts has elapsed, the diaphragm 12 is temporarily closed (FIG. 9(c))'. As a result, charge is transferred while the CCD 14 is irradiated with light, and so-called smear phenomenon, in which light leaks, is prevented from occurring.

When the aperture 12 is closed and sufficient time has elapsed to prevent smear generation, the readout pulse Q2 causes the CC
A video signal is read out from D14. This image was obtained by operating the electronic shutter for the time Ts□ calculated from the image data actually accumulated for one hour Ts, so it is an image with more accurate exposure settings. Therefore, this video signal is recorded on the magnetic disk 29 (FIG. 9(j)).

When this recording is completed, the rotation of the magnetic disk 29 is stopped (FIG. 9(f)), and the aperture 12 is fully opened (FIG. 9(C)).

Further, when the power switch 34 is turned off, the aperture 12
is closed (Fig. 9(a), (C)).

FIG. 10 is a block diagram showing the configuration of another embodiment of the electronic still camera of the present invention, and parts corresponding to those in FIG. 1 are given the same reference numerals.

In FIG. 10, 61 is a beam splitter, and C
It is attached to the board 62 together with the CD 14. The beam splitter 61 splits the light incident from the lens 11, and outputs the transmitted light to the optical finder 38 and the reflected light to the optical block 63 for focus detection.

66.67 are teleswitch and wide switch,
A zoom lens included in lens 11.

It moves through the zooming mechanism 69 and is operated when zooming. 68 is an autofocus drive mechanism that drives the lens 11 and performs focus adjustment.

The other configurations are the same as in FIG. 1.

FIGS. 11 and 12 show an optical block 6 for focus detection.
3 shows a more detailed configuration.

As shown in the figure, the optical block 63 includes field lenses 71. A mirror 72, a mask 73, and a separator lens 74 are housed therein.

When the substrate 62 is located downward in FIG.
A beam splitter 61 is placed in the beam path of the light incident from the lens 11, and the light transmitted therethrough is incident on the finder 38. Further, the light reflected by the beam splitter 61 is transmitted to a field lens 71, a mirror 72 . The light is incident on the CCD 14 via a mask 73 and a separator lens 74.

FIG. 13 shows an embodiment of a mechanism for moving the substrate 62 up and down.

In the figure, 81 is a shaft, which is fixed to a chassis (not shown) or the like. 82 is a rack fixed to the substrate 62; 83 is a pinion that meshes with the rack 82; and is rotated by a pulse motor 84.

These constitute a shift mechanism 15.

When the pulse motor 84 is supplied with a pulse and rotated, the pinion 83 rotates. This causes the rack 82 and therefore the board 62 to which the rack 82 is attached to be attached to the shaft 8.
1 and move up and down.

Although it is possible to move the beam splitter 61 independently of the CCD 14, the shift mechanism 15 is simplified by attaching both to the same substrate 62 and moving the substrate 62 as in this embodiment. This is advantageous for small size.

FIG. 14 is a developed plan view illustrating the principle of focus detection of the optical block 63 for phase difference focus detection.

Light from the subject is imaged on the imaging plane 91 by the lens 11. The light from the imaging plane 91 passes through the field lens 71 and enters the mask 73, where the lens 11 in FIG.
The light is divided into the light that passes through the upper half and the light that passes through the lower half. Each light is further incident on a different position of the CCD 14 via a separator lens 74.

Images on the CCD 14 created by these two lights move in opposite directions, depending on the amount and direction of defocus. Therefore, defocus can be detected from the difference in distance between these two images.

Since the CCD 14 has a two-dimensional (planar) imaging area, by using this for focus detection, the range of focus detection can be expanded two-dimensionally. Of course, at this time, it is necessary to add an optical system for detecting phase differences in other directions.

FIG. 15 shows the appearance of an electronic still camera having such a configuration.

In the figure, 100 is a housing, and 101 is a housing 10.
It is a door that opens and closes with respect to 0. The magnetic disk 29 can be inserted into and removed from the housing 100 by opening and closing the door 101.

Next, the operation will be explained with reference to the timing chart of FIG.

When the power switch 34 is turned on, the diaphragm 12 shifts from a fully closed state to a fully open state (FIGS. 16(a) and 16(d)).

The release switch 35 has two stages of switches 35P and 35R.
When the switch is pressed halfway, the switch 3
When 5P is on and fully pressed, switch 3
5R is also turned on.

When the switch 35P is turned on, the system controller 33 obtains the aperture value As of the aperture, the operating time T s of the electronic shutter, and the operating time TF (T Fl, T F
2) is calculated (FIGS. 16(b) and (f)).

First, for focus detection calculation, the vertical synchronization signal (Fig. 16 (h
)), unnecessary charges are swept out by high-speed sweep pulses P0 and F2, and the charges are accumulated for the calculated time TF (the time during which proper exposure can be obtained with the aperture 12 in the open state). The charges shown in FIG. 16(i) are read out by the read pulse Q and written into the image memory 59 (FIGS. 16(i) and (j)).

When writing to the image memory 59 is completed, in the next field, the system controller 33 reads data from the image memory 59 and performs focus detection calculations. Then, in accordance with the calculation result, in the next field, the lens 11 is moved via the autofocus drive mechanism 68 to perform focus adjustment (FIGS. 16(k) and (1)).

Similar operations are repeated multiple times (FIGS. 16(i) to (1)).

At this time, the operating times TF□ and TF2 of the electronic shutter are as follows.
It may be constant, or it may be changed sequentially in the same way as in the case described above.

Next, when the switch 35R is turned on, the aperture 12 is set to the aperture value As, and the pulse motor 84 is driven.
The CCD 14 is moved and placed in the light beam path of the lens 11, and the spindle motor 30 is rotated (16th
Figures (c) to (g)).

As in the case described above, first, the electronic shutter is operated for a time of 1 m T s, and is further operated for a time Ts calculated based on the video signal at that time.

The video signal at that time is read out with the aperture 12 closed and recorded on the magnetic disk 29 (FIG. 16(d),
(i), (j), (m)).

In this way, since the charge accumulation time of the CCD 14 is appropriately controlled in accordance with focus detection and imaging (aperture value and electronic shutter speed), the dynamic range of light intensity is widened.

When the power switch 34 is turned off, the diaphragm 12 is closed (FIGS. 16(a) and 16(d)).

FIG. 17 shows another embodiment in which the insertion position of the beam splitter 61 is different.

In this embodiment, a beam splitter 61 is arranged between the field lens 16 and the relay lens 19,
Fixed. Only the CCD 14 moves independently.

In this embodiment, the load on the shift mechanism 15 can be reduced compared to the embodiment shown in FIG.

FIG. 18 shows an embodiment of another driving mechanism for the CCD 14.

In this embodiment, the CCD 14 is rotated about the fulcrum 111 between a position within the light flux path of the lens 11 and a position within the light flux path of the separator lens 74 (outside the light flux path of the lens 11). It has become.

19 to 22 show examples in which the photometric elements 18 are arranged differently.

In the embodiment shown in FIG. 19, a photometric element ]-8 is arranged behind the mirror 20. In the embodiment shown in FIG. in this case.

It is necessary to configure the mirror 17 with a total reflection mirror and the mirror 20 with a half mirror.

In the embodiment of FIG. 20, the photometric element 18 is.

It is arranged behind the mirror 72. Therefore, in this case, it is necessary to configure the mirror 72 with a half mirror.

In the embodiment shown in FIG. 21, the photometric element 18 is arranged below the separator lens 74.

In the embodiment shown in FIG. 22, a photometric element 18 is attached to a package 14A of the CCD 14.

FIGS. 23(a) and 23(b) show the optical block 63.

This figure shows the configuration of an embodiment in which a diffusing optical element for embellishing colors (for detecting color temperature) is added.

In this embodiment, a diffusing optical element 131 is arranged below the separator lens 74 so that a portion of the light reflected from the mirror 72 is incident thereon. For this reason,
In addition to the separator lens 74, the mask 73 is also formed with holes for allowing light to pass through the diffusing optical element 131.

In this case, as shown in FIGS. 24(a) and (b), CC
D14 is a separator lens 74 during photometry (during color flooding)
A region 141 into which light is incident, and a diffusing optical element 13
1 and a region 142 into which light from 1 is incident.

It is preferable that the diffusing optical element 13 diffuses light sufficiently within a range that does not affect the incident area 141 of the separator lens 74. For this reason, the separator lens 74
and at least one direction of the diffusing optical element 131 (for example, the second
In FIG. 4(a), the radius R in a plane parallel to the paper surface can be set as the path distance.

In addition, the diffusing optical element 131 is shaped like a lens, and as shown in FIG. 25, a large number of particles that scatter light are mixed inside the diffusing optical element 131, or as shown in FIG. scattering surface).

When the light from the diffusing optical element 131 is detected and measured, the colorimetric calculation can be performed at the same timing as the focus detection calculation, as shown in FIG. 16(n).

At this time, the color components of the region 142 (for example, the ratio of the R signal and the B signal) are determined, the Why 1 to balance values are calculated, and the gain of the color signal in the processing circuit 25 is controlled.

In this way, by integrating the optical systems for focus detection and color temperature detection and detecting with one CCD 14, the configuration is simplified.

In the above embodiment, the video signal is recorded on the magnetic disk 29 using the magnetic head 27 as a recording means, but as shown in FIG. It is also possible to record the video signal on the memory card 151. At this time,
A/D conversion 8: Stores the output of ÷58 and writes it to the write circuit 152.
The image memory 153 for outputting the data needs to have a capacity capable of storing at least one field or one frame of data.

〔Effect of the invention〕

As described above, according to the electronic still camera of the present invention,
Since the image sensor is moved between the inside of the light beam path and the outside of the light beam path of the lens, a single-lens reflex camera configuration can be achieved without using a quick return mirror. Furthermore, a lens with a small amount of back focus can be used, and its diameter can be made small to ensure a desired F number. Therefore, it is possible to downsize the entire electronic still camera.

Furthermore, since the imaging light flux can be effectively utilized in the finder, a bright finder image can be obtained.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the configuration of an embodiment of an electronic still camera of the present invention. FIG. 2 is a block diagram showing the configuration of an example of a conventional single-lens reflex electronic still camera, FIG. 3 is a timing chart explaining the operation of the embodiment shown in FIG. 1, and FIGS. 4 and 5 are optical A block diagram of an embodiment in which a low-pass filter is inserted, FIGS. 6 and 7 are block diagrams of other embodiments of the optical finder, FIG. 8 is a front view of an interline CCD, and FIG. 9 is a block diagram of another embodiment of the optical finder. 5 is a timing chart illustrating the operation of the first embodiment when interline type COD is used. FIG. 10 is a block diagram showing the configuration of another embodiment of the electronic still camera of the present invention. FIG. 11 is a side view showing the configuration of the focus detection optical block. Fig. 12 is a perspective view showing the structure of the optical block for focus detection, Fig. 13 is a perspective view showing the structure of an embodiment of the substrate shift mechanism, and Fig. 14 is a development explaining the principle of phase difference focus detection. A plan view, FIG. 15 is a perspective view showing the external appearance of the electronic still camera of the embodiment shown in FIG. 10, FIG. 16 is a timing chart explaining the operation of the embodiment shown in FIG. 10, and FIG. 17 is insertion of a beam splitter. FIG. 18 is a block diagram showing the structure of another embodiment of the CCD drive mechanism; FIGS. 19 to 22 are block diagrams showing the arrangement of the photometric element. FIG. 2 is a block diagram showing the configuration of an embodiment. Figures 23 (,) and (b) are a side view and a front view when a diffusing optical element is added to the optical block; Figure 24 is a side view and a front view illustrating the operation of the diffusing optical element and COD; 25 and 26 are side views showing the configuration of other embodiments of the diffusing optical element. FIG. 27 is a block diagram showing the configuration of still another embodiment of the electronic still camera of the present invention. 1... Lens 2... C0D 3... Quick return mirror 4... Shift mechanism 5... Optical finder 11... Lens 12... Aperture 13 ・ 14 ・ 15 ・ 16 ・ 17 ・18 ・ 19 ・ 20 ・ 21 ・ 22 ・ 23 ・ 24 ・ 25 ・ 26 ・ 27 ・ 28 ・ 29 ・ 30 ・ 31 ・ 32 ・・Aperture drive mechanism・CCD・Shift mechanism °Field lens 15 ・Photometering element・Relay lens 6ζ foo, reimaging surface, magnifying glass, photometric circuit, drive circuit, processing circuit, recording circuit, magnetic head, head moving mechanism, magnetic disk, spindle motor, detection coil, spindle servo circuit 33 ・ 34 ・ 35 ・ 36 ・37 ・ 38 ・ ・System controller・Power switch・Release switch・Switch・Display element・Optical viewfinder

Claims (1)

[Scope of Claims] A lens that transmits light for photographing a subject; an image sensor that receives light that has passed through the lens; a recording device that records the output of the image sensor on a recording medium; An electronic still camera comprising a moving means for moving between a position where light transmitted through the lens is incident and a position where light is not incident.