JP2017118214A - Imaging apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an imaging apparatus that has a plurality of imaging parts and is capable of performing an optimum focusing operation when simultaneously carrying out still-image photographing and moving-image photographing.SOLUTION: An imaging apparatus is capable of simultaneously performing a still-image photographing operation by first photographing means (4) and moving-image photographing operation by second imaging means (5). Control is exerted such that as the semi-transmission mirror (3) is moved, a photographing area of the second imaging means (5) is varied.SELECTED DRAWING: Figure 2

Description

  The present invention relates to an imaging apparatus that can capture still images and moving images.

  In an imaging device such as a digital camera that captures a subject image by converting it into an electrical signal, the imaging light beam is received by the imaging device, a photoelectric conversion signal output from the imaging device is converted into image data, and a memory card, etc. Record on a recording medium. As the image sensor, a CCD (Charge Coupled Device), a CMOS sensor (Complementary Metal Oxide Semiconductor), or the like is used.

  Although it is possible to shoot still images and moving images using one image sensor, if you want to obtain both images at the same time, the difference in pixel readout processing and the optimal shooting conditions differ, so still image shooting During that time, it was necessary to temporarily interrupt the video.

  In order to solve the problem, as proposed in Patent Document 1, the first imaging unit and the second imaging unit are provided, and the first imaging unit captures a still image, and the second imaging unit captures a moving image. There is a technique to do. Patent Document 2 has a first image sensor disposed behind the mirror on the optical axis and a second image sensor disposed above the mirror, and the optical path length is increased by moving the mirror in the optical axis direction. It is described that the focus position of the image sensor disposed above the mirror is changed by changing the focus position.

JP 2012-231197 A JP 2005-99608 A

  As shown in FIG. 11, the first imaging unit 4 is disposed above the semi-transmissive mirror 3 that is driven in the optical axis direction, and the second imaging unit 5 is disposed behind the semi-transmissive mirror 3. It is possible to consider an imaging device that can be arranged and moved the semi-transparent mirror 3 in the optical axis direction to perform a focusing operation at different positions for moving images and still images.

  However, in the above-described imaging device, the focusing operation by the focus lens affects the focusing operation of both the moving image and the still image, and the distance measuring operation of each image sensor cannot be performed independently. Optimal ranging operation cannot be performed. Further, when the focusing operation is performed by moving the semi-transmissive mirror in the optical axis direction, there is a problem that the position of the subject photographed by the image sensor disposed above the semi-transmissive mirror moves.

  SUMMARY OF THE INVENTION An object of the present invention is to provide an imaging apparatus capable of performing an optimum focusing operation at the time of simultaneous shooting of still images and moving images.

In order to achieve the above object, an imaging apparatus according to the present invention includes:
A photographic lens unit (2) and a lens driving means 31 included in the photographic lens unit (2) for driving a focus lens (30) for focusing in the optical axis direction;
A semi-transmission mirror (3) and a semi-transmission mirror (3) are split in the direction of the optical axis. Mirror driving means (17) for driving
An imaging apparatus having a first imaging means (4) for receiving a light beam transmitted through the semi-transmissive mirror (3) and a second imaging means (5) for receiving a light beam reflected by the semi-transmissive mirror (3). In
The imaging apparatus further includes lens position information acquisition means (32) for acquiring the position of the focus lens (30), mirror position information acquisition means (33) for acquiring the position of the semi-transmissive mirror (3),
A lens position control means 15 for controlling the position of the focus lens (30); and a mirror position control means 15 for controlling the position of the semi-transmissive mirror (3).
The imaging device can simultaneously perform still image shooting by the first imaging means (4) and moving image shooting by the second imaging means (5), and with the movement of the semi-transmissive mirror (3) Control for changing the imaging region of the second imaging means (5) is performed.

  According to the present invention, it is possible to provide an image pickup apparatus that has a plurality of image pickup units and can perform an optimum focusing operation at the time of simultaneous shooting of still images and moving images.

It is a front and back perspective view of an example of camera 1 in this embodiment. It is a block diagram which shows the main electrical circuit structure of an example of the camera 1 in this embodiment. FIG. 6 is a central cross-sectional view along the photographic optical axis showing a correspondence relationship between a mirror position of an imaging apparatus as an example of the camera 1 in the present embodiment and an imaging area of the second imaging means 5. 5 is a flowchart showing an example of the operation of the camera 1 in the present embodiment. 5 is a flowchart showing an example of the operation of the camera 1 in the present embodiment. 5 is a flowchart showing an example of the operation of the camera 1 in the present embodiment. 5 is a flowchart showing an example of the operation of the camera 1 in the present embodiment. It is a figure which shows the screen display on the display apparatus in the still image shooting mode of one example of the camera 1 in this embodiment, and a moving image shooting mode. It is a figure which shows the motion of the focus lens 30 and the semi-transmission mirror 3 at the time of the still image ranging of an example of the camera 1 in this embodiment. It is a figure which shows the motion of the focus lens 30 and the semi-transmission mirror 3 at the time of the moving image ranging of an example of the camera 1 in this embodiment. It is a figure which shows the screen display on a display apparatus in the still image / moving image simultaneous imaging | photography mode of an example of the camera 1 in this embodiment. FIG. 4 is a central cross-sectional view along the photographing optical axis showing the operations of the focus lens 30 and the semi-transmissive mirror 3 during the simultaneous photographing of still images / moving pictures of an example of the camera 1 in the present embodiment. It is a center sectional view in the photographing optical axis which shows the relation between the 1st image pick-up means 4 and the 2nd image pick-up means 5 of an example of camera 1 in this embodiment. It is a center sectional view in the photographing optical axis showing an example of an imaging device considered by combination of the conventional examples.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Moreover, the same code | symbol is attached | subjected to the common part in each drawing.

[First Embodiment]
First, the main configuration of the first embodiment of the present invention will be described with reference to FIGS.

  FIG. 1 is a front / rear perspective view of a camera 1 according to the present embodiment. FIG. 2 is a block diagram showing a main electric circuit configuration of the camera 1 in the present embodiment. FIG. 3 is a central cross-sectional view along the photographing optical axis showing the correspondence between the mirror position of the camera 1 and the photographing region of the second imaging means 5 in the present embodiment.

  A detachable photographic lens unit 2 is attached to the camera 1. The photographic lens unit includes a focus lens 30 and a lens driving unit 31 for driving the focus lens 30. The light beam incident from the photographic lens unit 2 is incident on the semi-transmissive mirror 3 that is inclined with respect to the photographic optical axis AA. The semi-transmissive mirror 3 is configured to be movable in parallel with the photographing optical axis AA direction by the mirror driving means 17. The mirror driving means 17 uses a mechanism such as a lead screw or a rack gear. Further, the position of the transmission mirror 3 is detected by a mirror position detection sensor 33. The mirror position detection sensor 33 is composed of a rotary encoder or the like.

  A part of the light beam incident on the semi-transmission mirror 3 is configured to pass through the semi-transmission mirror 3 and form an image on the first imaging means 4 inside the camera 1. The remaining light beam incident on the semi-transmissive mirror 3 is reflected by the semi-transmissive mirror 3 and forms an image on the second imaging means 5. Here, the first image pickup means 4 and the second image pickup means 5 are constituted by, for example, a CCD, a CMOS, or the like.

  The first imaging unit 4 includes a first focus detection sensor 22, and the second imaging unit 5 includes a second focus detection sensor 24. Specifically, an imaging element is composed of a plurality of shooting pixels for photoelectrically converting a subject image and a plurality of focus detection pixels for phase difference detection, and a light beam that has passed through different regions of the shooting lens unit 2 is focused on each focus. It has pupil division means for leading to detection pixels. The first focus detection sensor 22 and the second focus detection sensor 24 perform phase difference type focus detection. Signals output from the first focus detection sensor 22 and the second focus detection sensor 24 are respectively supplied to the first focus drive circuit 23 and the second focus drive circuit 25, converted into subject image signals, and then controlled by the camera circuit. It is transmitted to the microcomputer 15. Then, the camera circuit control microcomputer 15 performs focus detection calculation by the phase difference detection method based on the subject image signal. Specifically, the camera circuit control microcomputer 15 calculates the defocus amount and direction using the subject image signal, and takes an image via the lens control circuit 19 and the lens driving unit 31 according to the calculated defocus amount and direction. The focus lens 30 in the lens unit 2 is driven to the in-focus position.

  In the present embodiment, the phase difference detection type focus detection sensors arranged in the first imaging unit 4 and the second imaging unit 5 are described, but other arrangements and other types may be used. For example, a known phase difference type focus detection unit may be arranged independently, or a known contrast type focus detection by the first imaging means 4 and the second imaging means 5 may be used.

  The position of the focus lens 30 is fed back to the camera circuit control microcomputer 15 by the lens position detection sensor 32. The lens position detection sensor 32 is composed of a rotary encoder or the like.

  Then, by moving the semi-transmissive mirror 3 in the direction of the photographing optical axis AA, the optical path length of the second imaging unit 5 can be changed to perform focus adjustment. The transflective mirror 3 is driven by the camera circuit control microcomputer 15 via the mirror driving means 17. Further, the position of the semi-transmissive mirror 3 is fed back to the camera circuit control microcomputer 15 by the mirror position detection sensor 33. The mirror position detection sensor 33 is composed of a rotary encoder or the like. Further, when the semi-transmissive mirror 3 moves in the order of a1, a2, and a3 in parallel with the photographing optical axis AA direction, the imaging area of the second imaging means 5 is moved (crop) to the corresponding positions b1, b2, and b3.

  The first image pickup means 4 is driven / controlled by the first image pickup means drive / control circuit 6, and the analog signal output from the first image pickup means 4 is converted into a digital signal by the first A / D conversion circuit 7. The second imaging means 5 is driven / controlled by the second imaging means drive / control circuit 8, and the analog signal output from the second imaging means 5 is converted to a digital signal by the second A / D conversion circuit 9. The digital signals output from the first A / D conversion circuit 7 and the second A / D conversion circuit 9 are processed by the image processing circuit 10 and are generated as image data. The image data is stored in the buffer memory 11 or displayed on the display device 13 and the in-finder display device 50 which are configured by liquid crystal or the like by the display member driving circuit 12. The display device 13 and the in-finder display device 50 can display various information such as a shooting mode, a lens aperture value, a shutter speed value, and ISO sensitivity. The eyepiece 51 can enlarge and observe image data and various information displayed on the in-viewfinder display device 50.

  Next, the camera 1 of this embodiment includes a digital circuit control microcomputer 14 and a camera circuit control microcomputer 15. The digital circuit control microcomputer 14 communicates and exchanges data with the image processing circuit 10 and the display member drive circuit 12 via the CPU bus, and performs overall control thereof. The camera circuit control microcomputer 15 detects the state of various operation members 16 such as a release button 71, a moving picture distance measuring button 72, a moving picture start button 73, and various other switches and buttons, and mirror driving means for driving the semi-transmissive mirror 3. The 17 arithmetic operations are performed in an integrated manner. In addition, the camera circuit control microcomputer 15 has an in-camera setting storage unit composed of an EEPROM 18, and various setting values of the camera 1 are recorded therein. The camera circuit control microcomputer 15 communicates with the lens control circuit 19 in the photographic lens unit 2 via the mount contact 20. The mount contact 20 also has a function of transmitting a signal to the camera circuit control microcomputer 15 when the photographing lens unit 2 is connected. In-lens memory 21 in the photographic lens unit 2 stores lens specific information, and includes information on the focal length, angle of view, and aperture of the lens. The digital circuit control microcomputer 14 and the camera circuit control microcomputer 15 communicate with each other and control the entire camera 1 in cooperation.

  The switch sense circuit 16 transmits an input signal to the camera circuit control microcomputer 15 in accordance with the operation state of each switch. A release button 71 is disposed on the camera 1. The release button 71 is a two-step switch that is half-pressed and fully pressed, and can perform a distance measuring operation, a photographing operation, and the like of the camera 1. In addition, a moving image distance measuring button 72, a moving image start button 73, a shooting mode setting dial 74, a main switch 75, and various operation members 16 are connected to the switch sense circuit 76. A distance measuring operation in a moving image can be performed with the moving image ranging button 72, and moving image shooting can be started with a moving image start button 73. The shooting mode setting dial 74 is a dial that can set various shooting modes of the camera 1.

  The above is the outline of the main electric circuit configuration of the camera 1 in the present embodiment.

  Next, the operation of the camera 1 in this embodiment will be described with reference to FIGS.

  FIG. 4A, FIG. 4B, FIG. 4C, and FIG. 4D are flowcharts showing the operation in each shooting mode of the camera 1 in this embodiment. FIG. 5 is a diagram showing screen display on the display device in the still image shooting mode and the moving image shooting mode, and FIG. 6 is a diagram showing screen display on the display device in the still image / moving image simultaneous shooting mode. FIG. 7 is a diagram showing the operation of the focus lens 30 and the semi-transmissive mirror 3 at the time of simultaneous shooting of still images / moving images.

  First, the operation of the camera 1 will be described with reference to FIG.

  In S200, the user selects a mode by operating the shooting mode setting dial 74.

  Next, in S201, the camera 1 determines whether or not the “still image shooting mode” is selected. If it is determined as “still image shooting mode”, the process proceeds to the “still image shooting mode” subroutine S204. Otherwise, the process proceeds to S202. Details of the operation of the “still image shooting mode” subroutine S204 will be described later in the description of each mode.

  Next, in S202, the camera 1 determines whether or not “moving image shooting mode” is selected. If it is determined as “moving image shooting mode”, the process proceeds to the “moving image shooting mode” subroutine S205. Advances to S203. Details of the operation of the “moving image shooting mode” subroutine S205 will be described later in the description of each mode.

  Next, in S203, the camera 1 determines whether or not the “still image / moving image simultaneous shooting mode” is selected. If it is determined that the “still image / moving image simultaneous shooting mode” is selected, the “still image / moving image simultaneous shooting mode” is determined. The process proceeds to "shooting mode" subroutine S206. Details of the operation of the “still image / moving image simultaneous shooting mode” subroutine S206 will be described later in the description of each mode.

[Still image shooting mode]
Next, details of the operation when the subroutine “still image shooting mode” is selected in FIG. 4A will be described with reference to FIG.

  When the still image mode is selected in S201, the process proceeds to S101 to enter a still image shooting standby state, and the display on the display device 13 is switched to a display as shown in FIG. As shown in FIG. 5A, the display device 13 displays a first imaging unit imaging region 40 that is an imaging range of the first imaging unit 4 as a through image. At this time, the subject whose distance is to be measured can be arbitrarily selected by the user.

  Next, when a distance measurement instruction for the first image pickup unit 4 is given by half-pressing the release button 71 in S102, a display as shown in FIG. 5B is displayed in S103, and the in-focus position of the first image pickup unit 4 is set. The first imaging means focusing point 40a shown is displayed. Further, the first imaging unit 4 performs a still image ranging operation by driving the focus lens 30 with respect to the subject selected at the first imaging unit focusing point 40a. In the still image distance measuring operation, the distance is continuously measured while the release button 71 is half-pressed, the amount of focus shift is detected for each distance measurement, and the subject moving direction is detected by detecting the focus moving direction of the object. Predict. Further, focus lens control is performed in consideration of the release time lag of the camera 1 so that the subject is in focus when shooting.

  Here, an example of the distance measuring operation at the time of the still image distance measuring operation is shown in FIG. The horizontal axis represents time t, the vertical axis represents the image plane position x, and the operation is shown for the focus lens 30 assuming that the image plane position x can be approximated to two. At this time, as shown in FIG. 6, the still image ranging operation is driven in consideration of the moving distance of the subject with the release time lag. Therefore, the focus lens moves toward the ideal image plane position considering the release time lag shown in FIG.

  Then, when the release button 71 is fully pressed in S104, still image shooting is performed by the first imaging unit 4 in S105. In step S207, the camera circuit control microcomputer 15 determines whether the power is on or off. If the power is on, the process returns to S201, and if the power is off, the process ends.

[Movie shooting mode]
Next, details of the operation when the subroutine “moving image shooting mode” is selected in FIG. 4A will be described with reference to FIG.

  When the moving image mode is selected in S202, the process proceeds to S106 to enter a moving image shooting standby state, and the display on the display device 13 is switched to a display as shown in FIG. As shown in FIG. 5A, the display device 13 displays the first imaging unit imaging region 40 of the first imaging unit 4 as a through image. At this time, the subject whose distance is to be measured can be arbitrarily selected by the user.

  Next, when a distance measurement instruction operation is performed on the subject selected in S107, a display as shown in FIG. 5B is obtained in S108, and the first imaging means focusing point indicating the focusing position of the first imaging means 4 is displayed. 40a is displayed. Further, the first image pickup means 4 performs a moving picture distance measuring operation that follows the subject selected at the first image pickup means focusing point 40a by the focus lens. In the moving picture distance measuring operation, a distance measuring operation is continuously performed on a subject selected using a known technique such as face recognition or color recognition. Then, the amount of focus shift is detected for each distance measurement, and focus lens control is performed. Here, FIG. 7 shows an example of the distance measuring operation during the moving image distance measuring operation. The x axis represents the distance to the object, and the y axis represents the amount of movement of the focus lens 30. Further, it is assumed that the in-focus distance to the subject at the time of release is L, and that the subject is always moving. The horizontal axis represents time t, the vertical axis represents the image plane position x, and the operation is shown for the focus lens 30 assuming that the image plane position x can be approximated to two. At this time, as shown in FIG. 7, the focus lens moves toward the actual image plane position in the moving picture distance measuring operation.

  In this way, while focusing on the subject at the moment of shooting in still image shooting, the focus is always on the subject in moving image shooting, and on smooth operation that does not give the video a sense of incongruity. Different focus lens controls.

  When the moving image start / end button 73 is operated in S109, moving image shooting is started in S110. When the moving image start / end button 73 is operated again in S111, moving image shooting is ended in S112. In step S208, the camera circuit control microcomputer 15 determines whether the power is on or off. If the power is on, the process returns to S202, and if the power is off, the process ends.

[Still image / video simultaneous shooting mode]
Next, details of the operation when the subroutine “still image / moving image simultaneous shooting mode” is selected in FIG. 4A will be described with reference to FIG.

  If the still image / moving image simultaneous shooting mode is selected in S203, the process proceeds to S113 to enter a moving image shooting standby state, and the display on the display device 13 is switched to a display as shown in FIG. As shown in FIG. 8A, the display device 13 displays the second imaging unit imaging region 41 of the second imaging unit 5 as a through image. At this time, the subject whose distance is to be measured can be arbitrarily selected by the user.

Next, when a distance measurement instruction operation is performed on the subject selected in S114, a display as shown in FIG. 41a is displayed. Further, the second image pickup means 5 performs a distance measuring operation of the moving image so as to follow the subject selected at the second image pickup means focal point 41a by the focus lens.
Next, when the moving image start button 73 is operated in S116, moving image shooting by the second imaging means 5 is started in S117.

  Next, when the release button 71 is half-pressed in S118, a still image / moving image simultaneous shooting screen is displayed in S119, and the display on the display device 13 is switched to a display as shown in FIG. At this time, the first imaging unit 4 performs imaging for still image shooting, and the second imaging unit 5 performs imaging for moving image shooting.

  As shown in FIG. 8C, the display device 13 displays the first imaging unit imaging region 40 of the first imaging unit 4 as a through image. Further, a second imaging unit imaging region frame 41b indicating the second imaging unit imaging region 41 of the second imaging unit 5 is displayed. In addition, a first imaging means focusing point 40a indicating the focusing position of the first imaging means 4 and a second imaging means focusing point 41a indicating the focusing position of the second imaging means 5 are displayed. The initial position of the first imaging means focusing point 40a is displayed at the same position as the second imaging means focusing point 41a. Here, as shown in FIG. 8 (d), the positions of the first imaging means focusing point 40a and the second imaging means focusing point 41a can be arbitrarily operated by the user, and are separately provided for different moving images and still images. It is also possible to measure the distance of the subject. At this time, only the display position of the second imaging means focusing point 41a is in focus, and the subject is not in focus on the through image display.

  In step S120, the first imaging unit 4 performs a still image ranging operation at the first imaging unit focal point 40a. The distance measuring operation of the first imaging means 4 at this time is performed by driving the focus lens 30 in the photographing lens unit 2.

  At the same time, the moving image ranging operation control of the second imaging unit 5 is switched from the focus lens driving to the semi-transparent mirror 3 driving in S121. The semi-transparent mirror 3 is used to cancel the change of the focal plane of the second imaging unit 5 by driving the focus lens 30 for the still image ranging operation and to the subject selected by the second imaging unit focusing point 41a. At the same time, the video ranging operation that keeps focusing is performed simultaneously.

  Here, the operation for canceling the change of the focal plane of the second imaging means 5 will be described with reference to FIGS. As shown in FIG. 9A, the initial position of the focus lens 30 in S121 is c1. At this time, the initial position of the semi-transmissive mirror 3 is set to the center a1 of the drivable range. At this time, as shown in FIG. 9B, the imaging area is cropped so that the imaging area of the second imaging means 5 is b1.

  Next, when the focusing surface of the first imaging unit 4 is moved in the infinity direction, the focus lens 30 is moved to c2. As the focus lens 30 moves, the focal plane of the second imaging means 5 also moves in the infinity direction. At the same time, the semi-transmissive mirror 3 is moved to a2, and the focusing surface of the second imaging unit is moved toward the closest end. The operation of the semi-transmissive mirror 3 can cancel the change of the focusing surface of the second imaging unit due to the movement of the focus lens 30. At the same time, the imaging area is cropped so that the imaging area of the second imaging means 5 becomes b2. In this way, the change in the composition of the image photographed by the second imaging means 5 can be canceled by moving the crop region in accordance with the movement of the semi-transmissive mirror 3.

  Similarly, when moving the focusing surface of the first imaging unit 4 in the close-up direction, the focus lens 30 moves to c3, and at the same time, the semi-transmissive mirror 3 moves to a3. Thereby, it is possible to cancel the focal plane change of the second imaging unit due to the movement of the focus lens 30. Furthermore, the change in the composition of the image photographed by the second imaging means 5 can be canceled by moving the crop area so that the imaging area of the second imaging means 5 becomes b3 at the same time.

  With the above-described operation, each distance measurement operation can be made independent even when still image distance measurement is performed during moving image shooting. That is, the first imaging unit 4 can perform an optimum distance measuring operation for still image shooting, and the second imaging unit 5 can perform an optimum distance measuring operation for moving image shooting. Furthermore, since each distance measuring operation can be made independent, it is possible to shoot a different subject for each of a still image and a moving image.

  Next, when the release button 71 is fully pressed in S122, the process proceeds to S123 and the first imaging unit 4 performs still image shooting. If the release button 71 is not operated for a certain period of time after still image shooting, the still image / moving image simultaneous shooting mode display ends in S124, and the display device 13 displays the image as shown in FIG. A through image of the second imaging means 5 for taking a moving image is displayed. At the same time, in S125, the semi-transmissive mirror 3 moves to the center a1 of the drivable range that is the initial position (see FIG. 3). At the same time, in accordance with the driving of the semi-transmissive mirror 3, the focus lens 30 cancels the change of the in-focus plane of the second image pickup means 5, and the moving picture distance measurement is performed on the subject selected at the second image pickup means focusing point 41a. Perform the action.

  Then, after the semi-transmissive mirror 3 returns to the initial position a1, the moving image ranging operation is continued by driving the focus lens 30 in S126.

  Accordingly, the semi-transparent mirror 3 can be returned to the initial position a1 without moving the focus of the moving image, so that the next still image / moving image can be simultaneously captured. When the moving image start / end button 73 is operated in S127, moving image shooting is ended in S128. In step S209, the camera circuit control microcomputer 15 determines whether the power is on or off. If the power is on, the process returns to S203, and if the power is off, the process ends.

  Next, with reference to FIG. 10, the preferable form regarding the arrangement layout of the 1st imaging means 4 and the 2nd imaging means 5 is demonstrated. FIG. 10 is a cross-sectional view along the photographing optical axis showing the relationship between the first imaging means 4 and the second imaging means 5.

  Further, when cropping the imaging area of the second imaging means 5, as shown in FIG. 8C, the first imaging means imaging area 40 and the second imaging means imaging area 41 do not give a sense of incongruity when reproducing image data. In addition, it is desirable that they have the same aspect ratio.

  Therefore, as shown in FIG. 10, the relationship between the first image pickup means 4 and the second image pickup means 5 is the second image pickup means rather than the value obtained by dividing the vertical side 4a of the first image pickup means 4 by the horizontal side 4b. It is preferable to increase the value obtained by dividing the side 5d parallel to the photographing optical axis direction 5 by the side 5c perpendicular to the photographing optical axis direction. As a result, when the imaging area of the second imaging means 5 is cropped at the same aspect ratio as the first imaging means imaging area 40, it is possible to provide larger non-imaging areas b4 and b5 in the imaging optical axis direction. . Therefore, the followability of the imaging region of the second imaging unit 5 with respect to the movement of the semi-transmissive mirror 3 is ensured while minimizing the length of the side 5c perpendicular to the imaging optical axis direction of the second imaging unit 5. It becomes possible.

  As mentioned above, although preferable embodiment of this invention was described, this invention is not limited to these embodiment, A various deformation | transformation and change are possible within the range of the summary.

1 camera, 2 photographic lens unit, 3 transflective mirror, 4 first imaging means,
5 second imaging means, 15 camera circuit control microcomputer, 17 mirror driving means,
19 lens control circuit, 30 focus lens, 31 lens driving means,
32 Lens position detection sensor, 33 Mirror position detection sensor

Claims (4)

A photographic lens unit (2) and a lens driving means 31 included in the photographic lens unit (2) for driving a focus lens (30) for focusing in the optical axis direction;
A semi-transmission mirror (3) and a semi-transmission mirror (3) are split in the direction of the optical axis. Mirror driving means (17) for driving
An imaging apparatus having a first imaging means (4) for receiving a light beam transmitted through the semi-transmissive mirror (3) and a second imaging means (5) for receiving a light beam reflected by the semi-transmissive mirror (3). In
The imaging apparatus further includes lens position information acquisition means (32) for acquiring the position of the focus lens (30), mirror position information acquisition means (33) for acquiring the position of the semi-transmissive mirror (3),
A lens position control means 15 for controlling the position of the focus lens (30); and a mirror position control means 15 for controlling the position of the semi-transmissive mirror (3).
The imaging device can simultaneously perform still image shooting by the first imaging means (4) and moving image shooting by the second imaging means (5), and with the movement of the semi-transmissive mirror (3) An imaging apparatus characterized by performing control to change the imaging area of the second imaging means (5).   During simultaneous distance measurement of the first image pickup means (4) and the second image pickup means (5), a change in focus plane due to the movement of the focus lens (30) is caused by the movement of the focus lens (30). While canceling, the semi-transmissive mirror (3) is moved so as to perform the distance measuring operation of the second imaging means (5), and as the semi-transmissive mirror (3) moves, the second imaging means (5) The imaging apparatus according to claim 1, wherein control for changing the imaging region is performed.   After the simultaneous driving of the first imaging means (4) and the second imaging means (5), the semi-transmissive mirror (3) is moved to the center (a1) of the drivable range, and the semi-transmissive mirror (3) The image pickup apparatus according to claim 1 or 2, wherein the focus lens (30) is moved so as to cancel the change of the focal plane of the second image pickup means (5) due to the movement of the second image pickup means (5).   The side (5d) parallel to the imaging optical axis direction of the second imaging means (5) is more horizontal than the value obtained by dividing the vertical side (4a) of the first imaging means (4) by the horizontal side (4b). The imaging device according to any one of claims 1 to 3, wherein a value divided by the side (5c) is larger.