WO2005109993A2

WO2005109993A2 - Photographing device and digital camera

Info

Publication number: WO2005109993A2
Application number: PCT/JP2005/007828
Authority: WO
Inventors: Tsuyoshi Togawa
Original assignee: Olympus Corporation
Priority date: 2004-04-30
Filing date: 2005-04-25
Publication date: 2005-11-24
Also published as: JP2005316309A; WO2005109993A3

Abstract

A photographing device and a digital camera. In the digital camera, a relative deflection between an object and a digital single-lens reflex camera (10) is detected by angular velocity sensors (38a, 38b) in a camera body (12) through a mirror frame module (14). Based on signals from the angular velocity sensors (38a, 38b), the deflection of an imaging system is corrected by an imaging part position drive unit (34). Also, based on the signals from the angular velocity sensors (38a, 38b), the deflection of a monitoring system is corrected by an optical finder unit (40). Then, a first moving operation for correcting the deflection of the imaging system and a second moving operation for correcting the deflection of the monitoring system are performed independently of each other.

Description

Specification

Photographing device and digital camera

Technical field

The present invention relates to a photographing device and a digital camera equipped with the photographing device, and more particularly to an image blur correction technology of the photographing device.

Background art

[0002] An image shake (camera shake) correction device in a photographing apparatus detects information related to the swing of the photographing apparatus using an angular velocity sensor, and moves a part of the optical system based on the information. 2. Description of the Related Art There is known a device that performs image blur correction by shifting an optical axis.

[0003] The most important purpose of the image blur correction function is to suppress image blur at the time of exposure, and at the start of exposure, the correction optical system should be located near the center of the correction area so that it can move sufficiently in each direction. Is desirable.

[0004] Therefore, Japanese Patent No. 2752073 discloses a centering process for moving the correction optical system to near the center of the region prior to the start of exposure as an initial setting according to a shooting start operation during the correction operation. A method for performing the correction operation stroke is disclosed.

[0005] Also, Japanese Patent No. 2820254 discloses a centering process that performs a centering process immediately before an exposure start operation, but avoids exposure in a state where image blurring has occurred in a subject that originally has no image blurring. The technology for prohibiting the parallel operation of exposure and exposure has been disclosed.

[0006] On the other hand, Japanese Patent Application Laid-Open Nos. 9-329820 and 2003-91027 disclose configurations for performing shake correction in a finder optical system.

Disclosure of the invention

[0007] Accordingly, it is an object of the present invention to provide a photographing apparatus and a digital camera in which a movement area in each direction of a shake correction system with a small time lag is secured.

[0008] That is, the features of the present invention are as follows:

A shake detection unit that detects a relative shake between the subject and the imaging device,

A first correction unit that corrects image shake based on a signal from the shake detection unit, A second correction unit that is separated from the first correction unit,

An imaging device having

A photographing device in which a first moving operation for driving the first correction unit to a predetermined position and a second moving operation for driving the second correction unit to a predetermined position are independently executed. is there.

[0009] The features of the present invention include:

A shake detection unit that detects a relative shake between the subject and the imaging system,

A first correction unit that performs shake correction of the imaging system based on the signal of the shake detection unit force, and a second correction unit that performs shake correction of the observation system based on the signal of the shake detection unit force. A photographing apparatus that also serves as at least a part of optical elements in the imaging system and the observation system,

An imaging device in which a parallel operation of a first movement operation for driving the first correction unit to a predetermined position and a second movement operation is prohibited.

[0010] Further, the features of the present invention are as follows:

An observation system having an optical element for observing a subject,

An imaging system that has an optical element, and forms an image of the subject by using at least a part of the optical element also as an optical element of the observation system;

A shake detection unit that detects a relative shake between the subject and the imaging system, a first correction unit that performs shake correction of the imaging system based on a signal of the shake detection unit force, and the shake detection A second correction unit that performs shake correction of the observation system based on a signal from the unit, a first movement operation that drives the first correction unit to a predetermined position, and moves the second correction unit to a predetermined position. And a control unit that controls not to perform the second movement operation that drives the control unit in parallel.

[0011] The features of the present invention include:

An image sensor that forms an image of a subject;

A shake detection unit that detects a relative shake between a subject and the image sensor, a first correction unit that corrects image shake of an imaging system based on a signal from the shake detection unit, A second correction unit that is provided separately from the first correction unit and corrects image shake of an observation system that observes the subject;

A control unit that controls the first movement unit to drive the first correction unit to a predetermined position and the second movement operation to drive the second correction unit to a predetermined position so as to be executed independently. When,

It is a digital camera provided with.

Brief Description of Drawings

[FIG. 1] FIG. 1 is a perspective view schematically showing an external configuration of a digital camera according to a first embodiment of the present invention, with a part thereof being seen through.

FIG. 2 is a block diagram showing a schematic configuration of the camera in FIG. 1.

FIG. 3 is a diagram showing a configuration of an optical finder unit 40.

FIG. 4 is a perspective view showing a configuration of an imaging section position drive unit 34.

[FIG. 5] FIG. 5 is a diagram for explaining processing that leads to imaging of a framing taka of a camera in a modification of the first embodiment.

[FIG. 6] FIG. 6 is a perspective view schematically showing the external configuration of a digital single-lens reflex camera according to a second embodiment of the present invention by partially seeing through.

FIG. 7 is a block diagram showing a schematic configuration of the camera in FIG. 6.

FIG. 8 is a cross-sectional view showing an example of the configuration of the variable mirror 160.

FIG. 9A shows an example of the electrode arrangement of the variable mirror 160, and is a diagram showing the electrode arrangement on the mirror 162 side.

[FIG. 9B] FIG. 9B shows an example of the electrode arrangement of the variable mirror 160, and is a diagram showing the electrode arrangement on the lower substrate 164 side.

[FIG. 10] FIG. 10 is a diagram for explaining processing leading to framing image capture by a camera according to the second embodiment.

FIG. 11 is a schematic view of an optical element of a digital single-lens reflex camera according to a third embodiment of the present invention.

BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, an embodiment of the present invention will be described with reference to the drawings. (First Embodiment)

FIG. 1 is a perspective view schematically showing an external configuration of a digital camera according to a first embodiment of the present invention, with a part thereof being seen through.

In FIG. 1, the digital camera 10 includes a camera body 12 and a lens frame module 14.

The lens frame module 14 is mounted on the front surface of the camera body 12, and has a first group lens 16, a second group lens 18, a third group lens 20, and a fourth group lens 2 having a zoom function described later. It is configured to have 2 etc. The mirror frame module 14 is for guiding a luminous flux from a not-shown subject to a CCD 36 which is an imaging device.

On the upper surface of the camera body 12, a shirt button 32 corresponding to the shirt release switch is provided.

A CCD 36 is arranged inside the camera body 12 on the extension of the optical axis of each lens of the lens frame module 14. Therefore, the object image transmitted through the lens frame module 14 is formed on the CCD 36.

The lens frame module 14 also has a force directed toward the center of the imaging surface of the CCD 36. The optical axis corresponds to the Y axis shown in FIG. Then, the Z axis is defined in a direction going vertically upward through the intersection of the optical axis center and the CCD 36, and the direction perpendicular to each of the Y axis and the Z axis passing through the intersection of the optical axis center and the CCD 36. The X axis is defined.

Further, in the camera body 12, an imaging unit position drive unit 34 for controlling the position of the CCD 36 in the X-axis direction and the Y direction, and a blur detection for detecting vibration generated in the camera body 12. Angular velocity sensors 38a and 38b as means, an optical finder unit 40 used to confirm a subject during framing, and a force are arranged. Further, a liquid crystal monitor 42 is provided on the back surface of the camera body 12.

The details of the optical finder unit 40 will be described later.

FIG. 2 is a block diagram showing a schematic configuration of the digital camera in FIG.

In FIG. 2, the above-described lens frame module 14 includes a first group lens 16, a second group lens 18, a third group lens 20, a fourth group lens 22, and an aperture 24. A shirt 28 is provided in the camera body 12 behind the lens frame module 14. The first group lens 1 The luminous flux transmitted through the sixth and second lens groups 18 passes through the stop 24, passes through the third and fourth lens groups 20 and 22, passes through a shutter 28, and is a CCD (Charge Coupled Device) as an imaging means. Led to 36).

[0024] The CCD 36 is fixed to an imaging unit position drive unit 34, which is a first correction unit. In accordance with an instruction from the controller 50, the imaging unit position control unit 62 controls the imaging unit position drive unit 34 to perform position control in the X and Z directions shown in FIG.

[0025] The controller 50 controls the overall control operation of the camera. The controller 50 includes the above-described angular velocity sensors 38a and 38b, a zoom control unit A52, a zoom control unit B54, an aperture control unit 56, a focus control unit 58, a shirt control unit 60, and an imaging position control unit 62. , A memory 64, a control circuit 90, a signal processing unit 92, a memory 94, and an external personal computer (PC) 112 via an iZF (Interface) unit 110.

The zoom control unit A52 controls the second group lens 18 based on an instruction from the controller 50, and the zoom control unit B54 controls the third group lens 20 and the fourth group based on an instruction from the controller 50. It controls the lens 22. The angle of view is adjusted by these controls.

The aperture control unit 56 controls the aperture 24 based on an instruction from the controller 50.

The focus control unit 58 drives the fourth group lens 22 based on an instruction from the controller 50 to perform focus adjustment.

Further, the shirt control unit 60 controls the timing of the shirt 28 based on an instruction from the controller 50. The imaging unit position control unit 62 shifts the position control of the CCD 36 based on the instruction from the controller 50, as described above. This shift amount is controlled based on the output signals from the angular velocity sensors 38a and 38b, information on the focal length, the distance to the subject, and the like. The current position force of the CCD 36 is also calculated as the movement target position. After determining whether the target position is within the movable area of the CCD 36 or outside the movable area, each control is performed.

Specifically, when the movement target position is within the movable region, the CCD 36 sets an upper limit of a current to be supplied to a voice coil motor (VCM) 128, 136 described later by a power supply unit (not shown). It is moved toward the movement target position by the normal drive with the current amount I determined by the capability of the motor.

On the other hand, when the movement target position is out of the movable range, the CCD 36 controls the movement target position by thrust limiting drive in which the upper limit of the current supplied to the VCMs 128 and 136 is limited to I ′ (= 1/2). Moved towards.

[0031] In the memory 64, a control program for controlling the entire digital camera is stored in advance in an internal ROM. The memory 64 also includes a RAM, which is used as a working storage area when the controller 50 executes the control program.

The control circuit 90 controls the CCD 36 and the imaging processing unit 92 in accordance with an instruction from the controller 50. Although not shown, the imaging processing unit 92 includes a CDS (Correlated Double Sampling), an AGC (Automatic Gain Control), an ADC (Analog to Digital Converter). ). Then, the imaging processing section 92 performs a predetermined process on the analog signal output from the CCD 36, and converts the processed analog signal into a digital signal.

The signal processing unit 94 performs processing such as white balance and γ correction on the captured image data output from the imaging processing unit 92 and the image data output from the compression / Z expansion processing unit 96. is there. The signal processing unit 94 also includes an AE (Automatic Exposure) detection circuit and an AF (Automatic Focus) detection circuit.

The compression Z decompression processing section 96 performs compression processing and decompression processing of image data, and performs compression processing on the image data output from the signal processing section 94 and decompression on the image data output from the card IZF98. Perform processing. For example, jPEG (joint Photographic Experts Group) method is used for compression and decompression of image data.

The card IZF 98 is for transmitting and receiving data between the digital camera 10 and the memory card 100, and writes and reads image data. The memory card 100 is a semiconductor recording medium for recording data, and is detachable from the digital single-lens reflex camera 10. [0036] The memory 104 records a digital signal (image data) output from the signal processing unit 94, and a DAC (Digital to Analog converter) 106 outputs the digital signal (image data) from the signal processing unit 74. Converts digital signals to analog signals.

The liquid crystal display monitor 28 performs image display based on the analog signal output from the DAC 106. The liquid crystal display monitor 42 is provided on the back side of the camera body 12 as described above, and the photographer can take a picture while looking at the liquid crystal display monitor 42.

[0038] The interface (IZF) unit 110 includes a controller 50 and a personal computer (PC) 1

12 to send and receive data, for example, USB (UniversalSerial

Bus (registered trademark)) interface circuit is used.

The personal computer 112 is used to write focus sensitivity correction data of the CCD 36 into the memory 64 in the manufacturing stage of the digital camera, and does not constitute the digital camera 10. ,.

FIG. 3 is a diagram showing a configuration of the optical finder unit 40 described above.

In FIG. 3, the incident light flux transmitted through the objective lens 72 is transmitted through the half mirror 74 and guided to the eyepiece 76. On the other hand, the light that has passed through the frame 78 is reflected by the mirror 80 and the half mirror 74 and reaches the eyepiece 76. As a result, a frame is added to the finder image.

A coil 84 is fixed to the objective lens 72, and together with the permanent magnet 86, constitutes a VCM (Voice Coil Motor). When the coil 84 is energized,

The objective lens 72 is moved in the X-axis direction and the Z-axis direction, so that the image blur of the finder can be corrected.

FIG. 4 is a perspective view showing a configuration of the above-described imaging unit position drive unit 34.

In FIG. 4, on a base 120, a shaft 122 and a Z slider 126 guided by the shaft 124 are slidably supported in the Z-axis direction shown in FIG. It is configured so that it can be driven by the generated thrust.

On the Z slider 126, an X slider 134 guided by the shaft 130 and the shaft 132 is provided.

1S Same as above, slidably supported in the X-axis direction, and driven by the thrust generated by VCM136. It is configured to be able to move.

A CCD 36 is mounted on the X slider 134, and the CCD 36 is configured to be movable in two directions, ie, an X-axis direction and a Z-axis direction.

Next, a process of capturing an image of a camera framing in the first embodiment will be described with reference to FIG.

[0048] Note that Dl, D2, D3, and D4 shown in Fig. 5 represent synchronization bars, and indicate that operations of a plurality of systems sandwiched between these synchronization bars are performed in parallel. .

When the image blur correction function of the camera is turned on (ON) (SI), the operation immediately between the synchronization bars Dl and D2 is started.

First, the flag B is set to “0” (Sal), and then the output signals from the angular velocity sensors 38a and 38b are sampled (Sa2). Then, a target moving amount is calculated based on the output signals from the angular velocity sensors 38a and 38b, the focal length, and information on the distance to the subject (Sa3). Further, the objective lens 72 of the optical finder unit 40 is moved by the calculated movement amount (Sa4).

Here, it is determined whether or not the first release (half-press of the shirt button 32) has been performed (Sa5). As a result, if not executed, the processing from Sa2 is repeated.

On the other hand, when the first release is being executed, the content set in the flag B is determined next (Sa6). If the flag B is set to "0", the AE and AF operations are performed (Sa7). Next, after the flag B is set to "1" (Sa8), the second release (full press of the shirt button 32) is determined (Sa9).

On the other hand, if the flag B is not set to “0” at Sa6, the process directly proceeds to the determination of the second release (full press of the shirt button 32) (Sa9). Here, if the second release has not been executed, the processing from Sa2 is repeated. On the other hand, when the second release is being executed, the operation sandwiched by the synchronization bars Dl and D2 is completed.

Next, an operation performed in parallel with a series of operations from Sal to Sa9 will be described. First, it is determined whether or not the CCD 36 mounted on the imaging unit position drive unit 34 is at the center initial position (Sbl). If it is determined that the CCD 36 is not located at the center initial position, the CCD 36 is centered (moves to the center initial position) (Sb2). Thereafter, the flow shifts to Sbl, and the position of the CCD 36 is determined again.

If it is determined that the CCD 36 is located at the center initial position, the synchronization bar

The operation sandwiched by Dl and D2 is completed.

[0057] On the other hand, if it is determined in Sbl that it is located at the center initial position, the CCDS

The operation sandwiched by the synchronization bars Dl and D2 is completed without the 36 being moved.

Next, when the shirt 28 is released (S2), the operation sandwiched between the synchronization bars D3 and D4 is started immediately.

First, output signals from the angular velocity sensors 38a and 38b are sampled (SblO).

Further, a target moving amount is calculated based on the output signals from the angular velocity sensors 38a and 38b, the focal length, and information on the distance to the subject (Sbl 1). Then, the CCD 36 is driven (shifted) by this movement amount (Sbl2).

Thereafter, it is determined whether or not a desired exposure time has been completed (Sbl 3). Here, if it is determined that the exposure time has not been completed, the processing from SblO is repeated. On the other hand, when it is determined in Sbl3 that the exposure time has been completed, the operation sandwiched by the synchronization bars D3 and D4 is completed.

Next, an operation performed in parallel with a series of operations from SblO to Sbl3 will be described.

First, it is determined whether or not the objective lens 72 of the optical finder unit 40 is at the center initial position (SalO). Here, if it is determined that the objective lens 72 does not exist at the center initial position, the centering operation of the objective lens 72 is performed (Sail), and then the process proceeds to SalO to determine the position of the objective lens 72 again. You.

On the other hand, if it is determined in SalO that the objective lens 72 is located at the center initial position, the operation sandwiched by the synchronization bars D3 and D4 is completed without moving the objective lens 72. . Then, the shirt 28 is immediately shielded (S3), and the photographing operation is completed.

As described above, according to the first embodiment, the correction start preparation of the imaging system is performed during the observation operation, and the correction start preparation of the observation system is performed during the imaging. It is possible to greatly reduce delays in starting operation and discomfort at the start of operation.

(Second Embodiment)

Next, a second embodiment of the present invention will be described.

Note that the configuration and operation of the single-lens reflex camera in the second embodiment are basically the same as those in the first embodiment shown in FIGS. The same reference numerals or step numbers are assigned and the illustration and description thereof are omitted, and only different parts will be described.

FIG. 6 is a perspective view schematically showing an external configuration of a digital single-lens reflex camera according to a second embodiment of the present invention, with a part thereof being seen through.

In FIG. 6, the digital single-lens reflex camera 140 includes a camera main body 142 and a lens frame module 144.

The lens frame module 144 is detachably mounted on the front surface of the camera body 142, and includes a first-group lens 16 to a fourth-group lens 22 having a zoom function described later, and the like. . The mirror frame module 144 is for guiding a luminous flux from a subject (not shown) to the CCD 36 which is an imaging device.

On the upper surface of the camera body 142, a shirt button 32 corresponding to a shirt release switch is provided.

A movable mirror 146 and a CCD 36 are arranged inside the camera body 142 so as to extend the optical axis of the lens frame module 144.

The lens frame module 144 also has a force directed toward the center of the imaging surface of the CCD 36. The optical axis corresponds to the Y axis shown in FIG. 6, and passes through the intersection between the optical axis center and the CCD 36 and extends vertically upward. A Z-axis is defined in the force direction, and an X-axis is defined in a direction perpendicular to each of the Y-axis and the Z-axis passing through the intersection of the optical axis center and the CCD 36.

Further, in the camera body 142, angular velocity sensors 38a and 38b as shake detecting means for detecting vibration generated in the camera body 142 are arranged. In addition, the camera body 142 A liquid crystal monitor 42 is provided on the back of the camera.

When the movable mirror 146 is descending into the photographing optical path as shown in FIG. 6, the light beam reflected by the movable mirror 146 forms an image on the focusing screen 148. Then, the subject image formed on the focusing screen 148 is reflected by the Dahmirror 150, further reflected by the variable mirror 160, and reaches the eyepiece 152. Thereby, the photographer can check the subject image.

The detailed configuration of the variable mirror 160 will be described later.

On the other hand, although not shown, when the movable mirror 160 is raised and retracted from the photographing optical path, the light beam transmitted through the lens frame module 144 forms an image on the CCD 36.

FIG. 7 is a block diagram showing a schematic configuration of the digital single-lens reflex camera of FIG.

In FIG. 7, the above-described lens frame module 144 includes a first-group lens 16, a second-group lens 18, a third-group lens 20, a fourth-group lens 22, and an aperture 24. The mirror angle controller 156 connected to the controller 50 controls the angle of the variable mirror 160, which will be described in detail later.

[0080] The configuration and operation of other parts of this single-lens reflex camera are basically the same as those of the digital camera of the first embodiment shown in FIG. 2, and the same parts are denoted by the same reference numerals. And their illustration and description are omitted.

Next, the configuration of the variable mirror 160 will be described with reference to FIG. 8 and FIG.

FIG. 8 is a cross-sectional view illustrating an example of the configuration of the variable mirror 160, and FIG. 9A is a view illustrating an example of the electrode arrangement of the variable mirror 160. FIG. FIG. 4 shows an example of the electrode arrangement of the variable mirror 160, and is a diagram showing the electrode arrangement on the lower substrate 164 side. The variable mirror 160 shown in FIGS. 8 and 9 is manufactured using a so-called MEMS (Micro Electro Mechanical System) technology.

As shown in FIG. 8 and FIG. 9, the variable mirror 160 as the second correction means includes a mirror 162, a lower substrate 164 disposed opposite to the mirror 162, and mirrors at both ends. The mirrors 162, 166, 168, 170, 172 connected to the base plate 162 and the lower substrate 164, and a pivot 174 for supporting a substantially center of the mirror 162 are provided. The mirror 162 has an upper electrode 178 and an external lead electrode 180. A reflecting portion (mirror surface) 1 is provided on the surface of the mirror 162. 82 are provided.

The upper electrode 178 is sandwiched between the thin films 184 and 184, and is provided in parallel with the reflection surface of the reflection section 182. The upper electrode 178 is formed in a substantially rectangular shape as shown in FIG. 9A. The external lead electrode 180 is used for electrical connection between the upper electrode 178 and the outside, and its surface is exposed.

The lower electrodes 190, 192, 194, and 196 provided on the lower substrate 164 are sandwiched between the thin films 208, and are provided at positions facing the upper electrode 178. That is, the lower substrate 164 is provided with four lower electrodes 190 to 196 and four external lead electrodes 198, 200, 202, 204 on the semiconductor substrate 206. The outer lead electrodes 198 to 204 are used for electrical connection between the lower electrodes 190 to 196 and the outside, and their surfaces are exposed.

[0086] The four panels 166 to 172 described above are arranged between the mirror 162 and the lower substrate 164. The mirror 162 and the lower substrate 164 are connected via these panels 166 to 172.

[0087] A pivot 174 is formed corresponding to the center position of the four panels 166 to 172, that is, the center position of the four lower electrodes 190 to 196. That is, the center of gravity of the mirror 162 is pressed by the tensile force of the panels 166 to 172. This makes it possible to tilt the mirror 162 about the pivot 174.

In the variable mirror 160 having the above-described configuration, the potential difference between the upper electrode 178 and the lower electrodes 190 to 196 is changed, so that the mirror 162 with respect to the lower substrate 164 is generated by electrostatic force. Can be changed.

As described above, the light beam reflected by the movable mirror 146 reaches the eyepiece 152 after being reflected by the variable mirror 160 via the focusing screen 148 and the roof mirror 150. Therefore, by changing the tilt of the mirror 162, the subject image viewed through the eyepiece 152 can be moved, and image blur correction in the finder can be realized.

Next, a description will be given, with reference to FIG. 10, of a process in which a camera framing image is captured by the camera according to the second embodiment. [0091] Note that Dll, D12, D13, and D14 shown in FIG. 10 represent synchronization bars, and indicate that operations of a plurality of systems sandwiched between these synchronization bars are performed in parallel. I have.

When the image blur correction function of the camera is turned on (ON) (S21), the operation immediately between the synchronization bars Dll and D12 is started.

First, “0” is set to the flag B (Sa31), and then the output signals from the angular velocity sensors 38a and 38b are sampled (Sa32). Then, a target moving amount is calculated based on the output signals from the angular velocity sensors 38a and 38b, the focal length, and information on the distance to the subject (Sa33). Further, the mirror 162 of the variable mirror 160 is tilted by the angle calculated in Sa33 (Sa34).

[0094] Here, it is determined whether or not the first release (half-press of the shirt button 32) has been performed (Sa35). As a result, if not executed, the processing from Sa32 is repeated.

[0095] On the other hand, when the first release is being executed, the content set in the flag B is determined next (Sa36). If "0" is set in the flag B, the AE and AF operations are executed (Sa37). Next, after the flag B is set to "1" (Sa38), the second release (full press of the shirt button 32) is determined (Sa39).

On the other hand, if “0” is not set to the flag B in Sa36, the flow directly proceeds to the determination of the second release (full press of the shirt button 32) (Sa39). Here, if the second release is not performed, the process from Sa32 is repeated.If the second release is performed, the operation sandwiched by the synchronization bars Dll and D12 is completed. You.

[0097] Next, an operation that is performed in parallel with a series of operations from Sa31 to Sa39 will be described.

First, it is determined whether or not the CCD 36 mounted on the imaging unit position drive unit 34 is at the center initial position (Sb31). If it is determined that the CCD 36 does not exist at the center initial position, the CCD 36 is centered (moves to the center initial position) (Sb32). Thereafter, the flow shifts to Sb31, where the position of the CCD 36 is determined again. If it is determined that the CCD 36 is at the center initial position, the operation sandwiched by the synchronization bars Dll and D12 is completed.

[0100] On the other hand, if it is determined that the Sbl l is located at the center initial position, the operation sandwiched by the synchronization bars Dl l and D12 is completed without moving the CCD 36. .

Next, the movable mirror 146 is moved up so as to be retracted from the photographing optical path (S22). Then, the operation immediately between the synchronization bars D13 and D14 is started.

[0102] First, the shirt 28 is released (Sb40). Next, output signals from the angular velocity sensors 38a and 38b are sampled (Sb41). Further, a target moving amount is calculated based on the output signals from the angular velocity sensors 38a and 38b, the focal length, and information on the distance to the subject (Sb42). Then, the CCD 36 is driven (shifted) by this movement amount (Sb43).

After that, it is determined whether or not the desired exposure time has been completed (Sb44). Here, if it is determined that the exposure time has not been completed, the processing from Sb41 is repeated. On the other hand, if it is determined in Sb44 that the exposure time has been completed, the shutter 28 is subsequently shielded (Sb45), and then the operation sandwiched by the synchronization bars D13 and D14 is completed.

Next, a series of operations from Sb40 to Sb45 and operations that are performed in parallel will be described.

First, it is determined whether or not the mirror 162 of the variable mirror 160 is located at the center initial position (Sa40). Here, if it is determined that the mirror is not located at the initial position at the center, the centering operation of the mirror 162 is performed (Sa41), and thereafter, the process proceeds to Sail, and the position of the mirror 162 is determined again. You.

[0106] On the other hand, if it is determined in Sa40 that the mirror exists at the center initial position, the operation sandwiched by the synchronization bars D13 and D14 is completed without driving the mirror 162.

[0107] Then, after the movable mirror 146 is lowered into the photographing optical path (S23), the photographing operation is completed.

In an actual shooting scene, a lot of time is spent in the waiting time for framing and shirt tasks, and the actual exposure time is insignificant. Therefore, as in the present embodiment, a power-saving actuator using electrostatic force is used in an observation system. By using it, a dramatic improvement in battery life can be expected.

Further, according to this configuration, the correction start preparation of the imaging system is performed during the observation operation, and the correction start preparation of the observation system is performed during the imaging operation. There is an advantage that discomfort at the start can be greatly reduced.

[0110] Further, in the present embodiment, the centering operation of the observation system is performed in a state where the optical path to the finder is blocked by the optical path switching by the movable mirror. Nothing ,.

In the configuration in which the optical path is switched by the movable mirror as in the present embodiment, the time required for switching between observation and imaging is inevitably generated. Therefore, the centering operation is performed within this time. Is also good.

[0112] In the second embodiment described above, the processing until the movable mirror raising force is also lowered is performed in parallel by the observation correction system and the imaging correction system. However, the observation is performed after the processing of the imaging correction system is performed. It is also possible to perform the processing of the observation correction system.

(Third Embodiment)

Next, a third embodiment of the present invention will be described.

FIG. 11 is a schematic diagram of an optical element of a digital single-lens reflex camera according to a third embodiment of the present invention. Hereinafter, the third embodiment will be described with reference to FIG.

The configuration of the camera according to the third embodiment is basically the same as that shown in FIGS. 1 to 10. Therefore, only different configurations will be described, and the other same parts will be described. Are given the same reference numerals, and their illustration and description are omitted.

[0116] In FIG. 11, the digital single-lens reflex camera 210 includes a camera body 212 and a camera body 2

The lens frame module 214 is detachably mounted on the front surface of the lens frame 12.

[0117] The mirror frame module 214 has a photographing lens 216. The light beam transmitted through the photographing lens 216 is guided to a movable mirror 220 in the camera body 212.

[0118] The movable mirror 220 in the camera body 212 is provided so as to be movable in and out of the imaging optical path. When the movable mirror 220 is lowered into the photographing optical path as shown in the figure, the photographing light beam from the photographing lens 216 is reflected by the movable mirror 220 and forms an image on the forcible screen 222. You. [0119] Then, the photographing light beam is a prism integrated with the first field lens 224.

After passing through 226, the light is reflected by the mirror A228 and then passes through the relay lens 230. Further, the light flux is transmitted through the second field lens 236 after being reflected by the mirror B1234, is reflected by the mirror C238, and reaches the eyepiece lens 240.

On the other hand, although not shown, when the movable mirror 220 is retracted outside the imaging optical path, the imaging light flux transmitted through the imaging lens 216 is captured by the CCD 242.

[0121] In order to perform camera shake correction, a method of decentering (shifting) the relay lens 230 in a plane perpendicular to the optical axis or a method of tilting the relay lens 230 with respect to the optical axis (tilt) may be used. Just do it. The shifting or tilting of the relay lens 230 can be realized by a general driving means, and thus the description is omitted here.

[0122] The flow of operation in the third embodiment is the same as that in the above-described second embodiment, and a description thereof will not be repeated.

[0123] Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and it goes without saying that various modifications can be made without departing from the spirit of the present invention. It is.

Industrial applicability

[0124] By using the present apparatus, it is possible to secure a movement area in each direction of the shake correction system with a small time lag.

Claims

The scope of the claims

[1] A shake detecting unit (38a, 38b) for detecting a relative shake between a subject and an imaging device, and a first for correcting image shake based on a signal from the shake detecting unit (38a, 38b). Correction section (3 4),

A second correction unit (40) that is separate from the first correction unit (34);

An imaging device having

A first movement operation for driving the first correction unit (34) to a predetermined position and a second movement operation for driving the second correction unit (40) to a predetermined position are independently performed. An imaging device characterized by being executed.

[2] The imaging device according to claim 1, wherein the predetermined position moved by the first movement operation is a substantially central part in a correction area of the first correction unit (34). apparatus.

[3] The imaging device according to claim 2, wherein the predetermined position moved by the second movement operation is a substantially central portion in a correction area of the second correction unit (40). apparatus.

4. The imaging device according to claim 3, wherein a parallel operation of the first moving operation and the second moving operation is prohibited.

[5] While one of the first correction unit (34) and the second correction unit (40) performs the correction operation, the other correction unit performs the movement operation. The photographing apparatus according to claim 4, wherein the photographing apparatus performs the operation.

[6] The method according to claim 5, wherein the first correction unit (34) performs a shake correction operation related to imaging, and the second correction unit (40) performs a shake correction operation related to observation. The imaging device as described.

[7] A shake detection unit (38a, 38b) for detecting a relative shake between the subject and the imaging system, and performs shake correction of the imaging system based on a signal from the shake detection unit (38a, 38b). A first amendment (34),

A second correction unit (160) for correcting a vibration of an observation system based on a signal from the shake detection unit (38a, 38b);

A photographing apparatus comprising at least a part of an optical element in the image pickup system and the observation system. An imaging device, wherein a parallel operation of a first movement operation for driving the first correction unit (34) to a predetermined position and the second movement operation is prohibited.

[8] The photographing apparatus according to claim 7, wherein the predetermined position related to the first movement operation is a substantially central part in a correction area of the first correction unit (34).

9. The photographing apparatus according to claim 8, wherein the predetermined position related to the second movement operation is a substantially central part in a correction area of the second correction unit (160).

[10] One of the first correction unit (34) and the second correction unit (160) performs a correction operation while the other performs a movement operation. The imaging device according to claim 9.

[11] The optical element according to claim 10, wherein the optical elements constituting the observation system and the imaging system include a movable mirror (146), and the optical path is selectively switched by the movable mirror (146). Shooting equipment.

12. The imaging device according to claim 11, wherein the second movement operation is performed in a state where a light beam is guided to the imaging system by switching an optical path by the movable mirror (146). apparatus.

13. The imaging apparatus according to claim 12, wherein the first movement operation is performed in a state where a light beam is guided to the observation system by switching an optical path by the movable mirror (146). .

14. The apparatus according to claim 13, wherein at least one of the first moving operation and the second moving operation is performed in parallel with switching of an optical path by the movable mirror (146). Shooting equipment.

15. The imaging device according to claim 10, wherein the optical elements constituting the observation system and the imaging system include a half mirror (74).

[16] A shake detection unit (38a, 38b) for detecting a relative shake between the subject and the imaging device, and correcting an image shake of the imaging system based on a signal from the shake detection unit (38a, 38b). A first correction unit (34)

A second correction unit (160) that is provided separately from the first correction unit (34) and corrects image blur of an observation system that observes the subject; A first movement operation for driving the first correction unit (34) to a predetermined position and a second movement operation for driving the second correction unit (160) to a predetermined position are executed independently of each other. A control unit (50) for controlling

An imaging device, comprising:

[17] An observation system (152) having an optical element for observing a subject,

An imaging system (36) having an optical element, wherein at least a part of the optical element is also used as an optical element of the observation system (152) to form an image of the subject;

A shake detector (38a, 38b) for detecting a relative shake between the subject and the imaging system (36),

A first correction unit (34) for performing shake correction of the imaging system based on signals from the shake detection units (38a, 38b);

A second correction unit (160) for correcting a shake of the observation system (40) based on a signal from the shake detection unit (38a, 38b);

The first movement operation for driving the first correction unit (34) to a predetermined position and the second movement operation for driving the second correction unit (160) to a predetermined position are not performed in parallel. Control unit (50) that controls

An imaging device, comprising:

[18] An image sensor (36) for forming an image of a subject,

A shake detector (38a, 38b) for detecting a relative shake between a subject and the image sensor (36),

A first correction unit (34) for correcting image blur of an imaging system based on a signal from the shake detection unit (38a, 38b);

A second correction unit (160) that is provided separately from the first correction unit (34) and corrects image blur of an observation system that observes the subject;

A first movement operation for driving the first correction unit (34) to a predetermined position and a second movement operation for driving the second correction unit (160) to a predetermined position are executed independently of each other. A control unit (50) for controlling

A digital camera, comprising: