JPH07295006A - Shake correction camera - Google Patents

Abstract

PURPOSE:To improve the detecting precision of a vibration-proof camera incorporating a vibration-proof mechanism by controlling so that a shake amount detecting device or a shake correcting device may not be driven in the midst of the power varying operation of a variable power lens. CONSTITUTION:Lens groups L1a and 5a constituting a lens group L1 and a lens group L2 are driven in an optical axis direction by a motor in a zoom driving device 12 so as to vary the power. A shutter 11 is arranged on the subject side of a shake correcting lens group 5a. A CPU circuit 2 controls the sequence of the camera and is provided with a timer circuit, a memory circuit and an arithmetic circuit executing various arithmetic processing. A camera shake amount outputted from the shake amount detecting device 1 is arithmetically processed by the CPU circuit 2 and outputted as a camera shake correcting signal. The camera shake correcting device 4 outputs a control signal for controlling the driving of a lens driving device 5 based on the camera shake correcting signal from the CPU circuit 2. In such constitution, the CPU circuit 2 controls so as not to drive the detecting device 1 or the correcting device 4 in the midst of the power varying operation of the variable power lens.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shake correction camera incorporating a shake correction mechanism.

[0002]

2. Description of the Related Art In a conventional shake correction camera incorporating this type of shake correction mechanism, a shake amount detection device for detecting a shake amount and a shake correction device for shake correction are provided while the power switch of the camera is turned on. , It was generally working all the time.

[0003]

However, during the zooming operation of the zooming lens, there is a problem that the shake detection accuracy deteriorates due to the vibration of the lens drive, the noise of the drive motor, or the drop of the power supply voltage due to the motor drive. there were. The present invention has been made in view of such a situation, and an object thereof is to improve the detection accuracy of an anti-vibration camera having a built-in anti-vibration mechanism.

[0004]

In order to achieve the above object, the invention as set forth in claim 1 provides a shake amount detecting device for detecting the shake amount of a camera, and shakes based on the output of the shake amount detecting device. A shake correction device for correction, a variable power lens capable of variable power operation, and a control device for controlling not to drive the shake amount detection device during the variable power operation of the variable power lens are provided.

According to a second aspect of the present invention, a shake amount detecting device for detecting the shake amount of the camera, a shake correcting device for correcting shake based on the output of the shake amount detecting device, and a variable magnification operation are possible. A variable power lens and a control device for controlling the shake correction device not to be driven during a variable power operation of the variable power lens. According to a third aspect of the invention, in the shake correction camera according to the first and second aspects, the variable magnification lens has a drive motor, and the variable power operation is performed using the drive motor.

[0006]

In the shake correction camera of the invention described in claims 1 to 3, the shake amount detection device and the shake correction device are controlled so as not to be driven during the zooming operation of the zoom lens.
The detection accuracy does not decrease.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block connection diagram showing an embodiment of a shake correction camera according to the present invention. In FIG. 1, the photographing optical system includes lenses L1 and L2. Lens L2
Is moved in the optical axis direction by the motor of the focusing drive device 9 to focus on the photographic film surface. Also,
The shake correction lens group 5a forming a part of the lens L1 can be moved in two directions orthogonal to the optical axis by the motor of the lens driving device 5. By moving the shake correction lens group 5a in the direction opposite to the direction in which the camera shakes during exposure,
It is possible to reduce the shake of the image projected on the film.

The lenses L1a and 5a constituting the lens unit L1 and the lens unit L2 are driven in the optical axis direction by a motor in the zoom drive unit 12 to be magnified. Shake correction lens group 5a
A shutter 11 is arranged in front of (on the side of the subject). The CPU circuit 2 controls the sequence of the camera of this embodiment. Further, the CPU circuit 2 includes a timer circuit, a counter circuit, a memory circuit, and an arithmetic circuit that performs various arithmetic processes.

The shake amount detecting device 1 is a device for detecting the shake amount of a camera. The shake amount output from the shake amount detection device 1 is arithmetically processed by the CPU circuit 2 and output as a shake correction signal. The shake correction device 4 includes the CPU circuit 2
A control signal for controlling the driving of the lens driving device 5 is output based on the shake correction signal from.

The lens driving device 5 moves the shake correction lens group 5a based on the control signal from the shake correction device 4.
The distance measuring device 6 measures the distance to the subject. The distance data output from the distance measuring device 6 is F by the CPU circuit 2.
The M calculation processing is performed and the distance correction signal is output.

The focusing control device 8 outputs a control signal for controlling the drive of the focusing drive device 9 based on the distance correction signal from the CPU circuit 2. The focusing drive device 9 moves the lens unit L2 based on a control signal from the focusing control device 8. Photometric device 7
Is a device for measuring the brightness of a subject. The photometric data output from the photometric device 7 is subjected to AE calculation processing by the CPU circuit 2 and output as an exposure signal.

The exposure control device 10 controls the shutter 11 based on the exposure signal from the CPU circuit 2. The display unit 3 is an LED or the like and displays the state of the camera. SW1
SW2 and SW2 are push button switches that constitute a release button. SW1 is turned on when half-pressed and SW1 is pressed fully.
And SW2 are both turned on.

SW3 and SW4 are push-button switches. When SW3 is turned on, the zoom control device is driven via the CPU 2 and the motor of the zoom drive device 12 drives the lens groups L1 and L2 to zoom up, that is, the focal length. To a long state. When SW4 is turned on, CPU2
The zoom control device is driven via the zoom drive device 12
The motors (1) and (2) drive the lens units L1 and L2 to zoom down, that is, to bring the focal length into a short state. As described above, these SW3 and SW4 form a zoom operation button. SW5 is a push button switch, and the constant magnification photographing mode is set and released each time the SW5 is turned on. SW
Reference numeral 6 denotes a push button switch, which sets and cancels the continuous zoom mode each time SW6 is turned on.

2 to 9 are flow charts for explaining the operation of the CPU circuit 2 in one embodiment of the anti-vibration camera according to the present invention. FIG. 2 is a main flowchart showing the entire operation of the camera. When the program starts, it is determined in step S1 whether an MSW (power switch) (not shown) is turned on, and the process waits until the MSW is turned on.
When the MSW is turned on, the lens barrel is driven to the WIDE end (short focal length position) in step S2.

In step S3, it is determined whether or not SW3 is turned on. When SW3 is turned on, zoom-up processing is performed in step S4, and the process proceeds to step S5. If SW3 is not turned on, the process proceeds to step S5. S in step S5
It is determined whether W4 is turned on, and if SW4 is turned on, the process proceeds to step S6. If SW4 is not turned on, the process proceeds to step S7.

Zoom-down processing is performed in step S6,
Go to step S7. In step S7, it is determined whether SW5 has changed, that is, whether it has been turned on. If SW5 has been turned on, the process proceeds to step S21. In step S21, it is determined whether or not it is in the constant magnification photographing mode state. If it is in the constant magnification photographing mode state, the setting of the constant magnification photographing mode is canceled in step S22, and the process proceeds to step S8.

If the constant magnification photographing mode is not set in step S21, the constant magnification photographing mode is set in step S23, and the process proceeds to step S8. In step S8, it is determined whether the SW6 has changed, that is, whether it has been turned on. If the SW6 has been turned on, zoom continuous shooting processing is performed in step S600, and then the process proceeds to step S9. If SW6 is not turned on, step S9
Proceed to. In step S9, it is determined whether or not the SW1 is turned on. When the SW1 is turned on, the photographing process of step S300 is performed, and then the process proceeds to step S10. If SW1 is not turned on, the process proceeds to step S10.

In step S10, it is determined whether or not the MSW is turned off. If the MSW is not turned off, the process returns to step S3. If the MSW is turned off, the lens barrel is retracted in step S11 and the program ends. Next, the subroutine program of the photographing process will be described with reference to FIGS.

In FIG. 3, when the subroutine program of the photographing process is started in step S300, it is determined in step S301 whether or not the constant magnification photographing mode is set. If it is the constant magnification photographing mode, the process proceeds to step S302. If it is not the constant magnification shooting mode, the process proceeds to step S306. In step S302, the distance measurement data is received from the distance measurement device 7 (distance measurement processing).

In step S303, the photographing magnification is read,
In step S304, the set focal length is calculated, and then step S
In 305, the taking lens is driven to the set focal length, and the process proceeds to step S306. In step S306, the shake amount detection device 1
To start. The timer A is started in the next step S307, and the flag A is set to 0 in step S308.

Next, in step S309, photometric data is received from the photometric device 7 (photometric processing). In step S310, the distance measurement data is received from the distance measurement device 7 (distance measurement processing). Then, in step S311, AE calculation is performed based on the photometric data received in step S309. In step S312, FM calculation is performed based on the distance measurement data received in step S310.

In the next step S313, the wait time T
After waiting for 1, the process proceeds to step S314. The wait time T1 is a time secured for stabilizing the shake amount detecting device 1. In step S314, step S310
AF calculation based on the distance measurement data received in
By outputting the calculated signal to the focusing control device 8, the focusing drive device 9 is driven, and the lens unit L2 is moved to a predetermined moving position.

In the next step S315, it is determined whether or not a shake correction control prohibiting switch (not shown) is turned on. If the shake correction control prohibition switch is turned on, the process proceeds to step S316, the flag B is set to 1, then the display of the display unit 3 is made to blink at 8 Hz in step S317, and the process proceeds to step S401 in FIG. Here, this 8H
The blinking display of z is a display for notifying that the shake correction control is not performed.

If it is confirmed in step S315 that the shake correction control prohibition switch is off, the next step S31
At 8, the flag B is set to 0. Then, in the next step S319, it is determined whether the output from the shake amount detecting device 1, that is, the shake amount is smaller than a predetermined value C or not. Here, the predetermined value C is a shake amount that can be shake-corrected by the shake correction mechanism mounted on the camera.

If it is determined in step S319 that the shake amount is smaller than the predetermined value C, in step S320 the display unit 3
Is lit up and the process proceeds to step S401 in FIG. The lit display of the display unit 3 indicates that the detected shake amount is within the correctable range. If it is determined in step S319 that the shake amount is larger than the predetermined value C, the display 3 is blinked at 2 Hz in step S321, and the process proceeds to step S401 in FIG. The 2 Hz blinking display on the display unit 3 indicates that the detected shake amount is outside the correctable range.

In step S401 of FIG. 4, the flag A is confirmed. If the flag A executed in step S308 is 0, the process proceeds to step S402. If it is determined in step S401 that the flag A is set to 1, the process proceeds to step S404. When it is confirmed in step S402 that the timer A is up (timer A is up when the time required to detect the reference value of the shake amount elapses), the flag A is set to 1 in step S403, and then the process proceeds to step S404. .

In step S404, it is confirmed whether or not the release button is fully pressed (SW2 is turned on).
To step S501. SW2 in step S404
If is turned off, it is confirmed in the next step S405 that the release button is half pressed (SW1 is turned on). S in step S405
When it is confirmed that W1 is off, the shake amount detecting device 1 is stopped in step S406.

Thereafter, the flag A is checked in step S407. If the flag A is 1, the process proceeds to step S409. If the flag A is 0, the timer A is stopped in step S408, and then the process proceeds to step S409. In step S409, the display on the display unit 3 is turned off, and then from step S410 to FIG.
Return to the flowchart. In this case, shooting is not performed.

When it is confirmed that the SW1 is turned on in step S405, it is confirmed in the next step S411 whether the shake correction control prohibiting switch is turned on.
At step 412, the flag B is reset to 1, and step S4
At 13 the display on the display unit 3 is changed to a blinking display of 8 Hz and the process returns to step S401. When it is confirmed in step S411 that the shake correction control prohibition switch is off, step S414
To reset the flag B to 0, and at the next step S41.
In step 5, it is judged whether the output from the shake amount detecting device 1, that is, the shake amount is larger than a predetermined amount C.

If it is determined in step S415 that the shake amount is smaller than the predetermined value C, in step S416 the display unit 3
Is turned on and the process returns to step S401. If it is determined in step S415 that the shake amount is larger than the predetermined value C, the display of the display unit 3 is changed to 2 Hz blinking display in step S417, and the process returns to step S401. Step S of FIG.
In 501, it is determined whether the mode is the self mode, and if YES, the process proceeds to step S506 after the self timer (for example, 10 seconds) has elapsed in step S505.

If NO in step S501, it is determined in the next step S502 whether the eye mode is red eye mode. If YES in step S503, after 1 second pre-irradiation in step S503, then step S5
Proceed to 06. If NO in step S502, the process waits for the wait time of T2 (shock avoidance time during release) in step S504, and then the process proceeds to step S506. In step S506, the display on the display unit 3 is turned off, and then in step S506.
Proceed to 507.

A step S507 confirms the state of the flag A, and if it is 1, the process proceeds to a step S509. If the result of the determination in step S507 is 0, the next step S508 waits until the timer A started in step S307 times out, and after the time elapses, the process proceeds to step S509. In step S509, the center of the shake correction lens 5a is moved from the initial reset position to the center position of the optical axis.

At the next step S510, the state of the flag B is confirmed. When the flag B is 1 in step S510, the shake correction control prohibit mode is recognized, and the process proceeds to step S513. When the flag B is 0 in step S510, it is recognized as a mode for performing shake correction control, and the shake correction process is started in next step S511. After the shake correction process is started, a wait time of T3 (running time for stabilizing the shake correction control) is waited in step S512, and then the process proceeds to step S513.

In step S513, the shutter starts to open. The shake correction process continues from step S511 before the shutter starts to open to step S515 immediately after the shutter has completely closed. A obtained in step S311
The EV value according to the E calculation value is opened at a predetermined time.

Thereafter, shutter closing processing is executed in step S514, and shake correction processing is stopped in step S515. Next, in step S516, the shake amount detection device 1 is stopped. Next, in step S517, the shake correction lens 5a
Is returned to the initial position, and the focus lens L2 is driven to a predetermined reset position in step S518.

Next, in step S519, film winding processing is performed. Then, the process returns from step S520 to the flowchart of FIG. Next, a subroutine program of the zoom continuous shooting process will be described with reference to FIGS. Step S
When the zoom continuous shooting subroutine program is started at 600, the zoom switch flag is reset at step S601. This zoom switch flag is for determining whether or not the zoom operation button is operated, and is set by operating the zoom operation button.

When the zoom switch flag is reset in step S601, S in step S602.
It is determined whether or not W3 is turned on, and if negative, the process proceeds to step S603. In step S603, it is determined whether SW4 is turned on. When the result in step S603 is negative, the process proceeds to step S604.

In step S604, it is determined whether SW1 is turned on, that is, whether the release button is half-pushed. If the result is affirmative, the process proceeds to step S605. Step S605
For, set focal length (fmm) for continuous zoom
The set number m of is read from a memory circuit (not shown).

Next, in step S606, the read value n of the counter of the counter circuit is set to zero. Further, step S6
07, the number of focal lengths set in step 605, m (m
Is preset in the CPU 2) and the read value n of the counter are compared to determine whether they are equal. If they are equal, the process proceeds to step S608 and returns to the flowchart of FIG. When the result in step S607 is negative, the process proceeds to step S609.

In step S609, the counter is incremented by 1. In step S610, the nth (the first number is n =
The set focal length (fmm) of 1) is read from the memory circuit. In step S611, this value is the current focal length fmm.
It is determined whether or not it is on the wide (W) side. In step S611, the nth set focal length (f
mm) value is on the wide-angle (W) side of the current focal length fmm, the process proceeds to step S612. If the nth set focal length (fmm) value is on the telephoto (T) side of the current focal length fmm, the process proceeds to step S613.

In step S612, the next shooting focal length fm
Zoom down to m, and then proceed to step S701 in FIG. In step S613, zoom up to the next shooting focal length fmm is performed, and then the process proceeds to step S701 in FIG.
On the other hand, if SW3 is turned on in step S602,
It proceeds to step S621.

In step S621, the zoom down flag is set. Next, in step S622, the lens barrel is zoomed up to the T end, and the flow advances to step S623. Further, if SW4 is turned on in step S603,
Proceed to 624.

In step S624, the zoom down flag is reset. Next, in step S625, the lens barrel is zoomed down to the W end, and the flow advances to step S623. In step S623, the zoom SW flag is set, and step S
Return to 602.

In step S701 of FIG. 7, the shake amount detecting device 1 is activated. The timer A is started in the next step S702, and the flag A is set to 0 in step S703. Next, in step S704, photometric data is received from the photometric device 7 (photometric processing). In step S705, the distance measurement data is received from the distance measurement device 7 (distance measurement processing).

Then, in step S706, step S7 is performed.
AE calculation is performed based on the photometric data received in 04. In step S707, FM calculation is performed based on the distance measurement data received in step S705. In the next step S708, after waiting for the wait time T1, the process proceeds to step S709. The wait time T1 is a time secured for stabilizing the shake amount detecting device 1.

In step S709, AF calculation is performed based on the distance measurement data received in step S705, and the calculated signal is output to the focusing control device 8, whereby the focusing drive device 9 is driven and the lens unit L2 is moved to a predetermined position. Move to the movement position. Next step S
At 710, it is determined whether or not a shake correction control prohibiting switch (not shown) is turned on. If the shake correction control prohibition switch is turned on, the flow advances to step S711 to set the flag B to 1
, And the display on the display unit 3 is made to blink at 8 Hz in step S712, and the process proceeds to step S801 in FIG. Here, the blinking display of 8 Hz is a display for notifying that the shake correction control is not performed.

If it is confirmed in step S710 that the shake correction control prohibition switch is off, the next step S71.
At 3, the flag B is set to 0. Then, in the next step S714, it is determined whether or not the output from the shake amount detection device 1, that is, the shake amount is smaller than a predetermined value C. Here, the predetermined value C is a shake amount that can be shake-corrected by the shake correction mechanism mounted on the camera.

If it is determined in step S714 that the shake amount is smaller than the predetermined value C, in step S715 the display unit 3
Is lit and displayed, and the process proceeds to step S801 in FIG. The lit display of the display unit 3 indicates that the detected shake amount is within the correctable range. If it is determined in step S714 that the shake amount is larger than the predetermined value C, the display 3 is blinked at 2 Hz in step S716, and the process proceeds to step S801 in FIG. The 2 Hz blinking display on the display unit 3 indicates that the detected shake amount is outside the correctable range.

In step S801 of FIG. 8, the flag A is confirmed. If the flag A executed in step S701 is 0, the process proceeds to step S802. If it is determined in step S801 that the flag A is set to 1, the process proceeds to step S804. When it is confirmed in step S802 that the timer A has timed up (timer A times out when the time required to detect the reference value of the shake amount elapses), the flag A is set to 1 in step S803, and then the process proceeds to step S404. .

In step S804, it is confirmed whether or not the release button is fully pressed (SW2 is turned on).
To step S901. SW2 in step S804
If is OFF, it is confirmed in the next step S805 that the release button is half pressed (SW1 is ON). S in step S805
When it is confirmed that W1 is off, the shake amount detecting device 1 is stopped in step S806.

Thereafter, the flag A is checked in step S807. If the flag A is 1, the process proceeds to step S809. If the flag A is 0, the timer A is stopped in step S808 and then the process proceeds to step S809. In step S809, the display on the display unit 3 is turned off, and the process returns to step S601 in FIG.
In this case, shooting is not performed.

When it is confirmed in step S805 that the SW1 is turned on, it is confirmed in next step S811 whether the shake correction control prohibiting switch is turned on.
In step 812, the flag B is reset to 1, and step S8
In 13 the display of the display unit 3 is changed to a blinking display of 8 Hz and the process returns to step S801. When it is confirmed in step S811 that the shake correction control prohibition switch is off, step S814
To reset the flag B to 0, and at the next step S81.
In step 5, it is judged whether the output from the shake amount detecting device 1, that is, the shake amount is larger than a predetermined amount C.

If it is determined in step S815 that the shake amount is smaller than the predetermined value C, in step S816 the display unit 3
Is turned on and the process returns to step S801. If it is determined in step S815 that the shake amount is larger than the predetermined value C, the display of the display unit 3 is changed to 2 Hz blinking display in step S817, and the process returns to step S801. Step S of FIG.
At 901, it is determined whether the mode is the self mode. If YES, the process proceeds to step S906 after the self timer (for example, 10 seconds) has elapsed in step S905.

If NO in step S901, it is determined in the next step S902 whether the eye mode is red eye mode. If YES in step S903, pre-irradiation for 1 second is performed in step S903, and then step S9.
Proceed to 06. If NO in step S902, the wait time of T2 (shock avoidance time during release) is waited in step S904, and then the process proceeds to step S906. In step S906, the display on the display unit 3 is turned off, and then in step S906.
Proceed to 907.

A step S907 confirms the state of the flag A, and if it is 1, the flow advances to a step S909. If the result of the determination in step S907 is 0, the next step S908 waits until the timer A started in step S702 has timed up, and after time has elapsed, the process proceeds to step S909. In step S909, the center of the shake correction lens 5a is moved from the initial reset position to the center position of the optical axis.

At the next step S910, the state of the flag B is confirmed. When the flag B is 1 in step S910, the shake correction control prohibit mode is recognized, and the process proceeds to step S913. If the flag B is 0 in step S910, it is recognized as the mode for performing the shake correction control, and the shake correction process is started in the next step S911. After the shake correction process is started, a wait time of T3 (running time for stabilizing the shake correction control) is waited in step S912, and then the process proceeds to step S913.

In step S913, the shutter starts to open. The shake correction process continues from step S911 before the shutter starts to open to step S915 immediately after the shutter has completely closed. A obtained in step S704
The EV value according to the E calculation value is opened at a predetermined time.

Thereafter, the shutter closing process is executed in step S914, and the shake correction process is stopped in step S915. Next, in step S916, the shake amount detecting device 1 is stopped. Next, in step S917, the shake correction lens 5a
Is returned to the initial position, and the focus lens L2 is driven to a predetermined reset position in step S918.

Next, in step S919, film winding processing is performed. Then, the process returns to step S602 in FIG.
Although the zoom lens is used as the photographing lens in the present embodiment, a multifocal lens such as a bifocal lens that varies the focal lengths of 35 mm and 70 mm may be used instead of the zoom lens.

[0060]

As described above, according to the first and second aspects of the present invention, since the shake amount detecting device or the shake correcting device is not operated during the zooming operation of the zoom lens, the shake is caused by the zooming operation. The detection accuracy does not decrease. Also,
According to the invention described in claim 3, noise of the drive motor,
Alternatively, the shake detection accuracy does not decrease due to the drop in the power supply voltage due to the motor drive.

[Brief description of drawings]

FIG. 1 is a block connection diagram showing an embodiment of a shake correction camera according to the present invention.

FIG. 2 is a flowchart showing an embodiment of a shake correction camera according to the present invention.

FIG. 3 is a flowchart showing an embodiment of the shake correction camera according to the present invention.

FIG. 4 is a flowchart showing an embodiment of a shake correction camera according to the present invention.

FIG. 5 is a flowchart showing an embodiment of the shake correction camera according to the present invention.

FIG. 6 is a flowchart showing an embodiment of the shake correction camera according to the present invention.

FIG. 7 is a flowchart showing an embodiment of the shake correction camera according to the present invention.

FIG. 8 is a flowchart showing an embodiment of the shake correction camera according to the present invention.

FIG. 9 is a flowchart showing an embodiment of the shake correction camera according to the present invention.

[Explanation of symbols]

 1 shake amount detection device 2 CPU circuit 3 display section 4 shake correction device 5 lens drive device 5a shake correction lens group 6 distance measuring device 7 photometric device 8 focusing control device 9 focusing drive device 10 exposure control device 11 shutter 12 zoom drive device 13 Zoom control device

Claims (3)

[Claims] 1. A shake amount detecting device for detecting a shake amount of a camera, a shake correcting device for correcting shake on the basis of an output of the shake amount detecting device, a zoom lens capable of zooming operation, and the zooming device. A shake correction camera, comprising: a control device that controls the shake amount detection device not to be driven during a zooming operation of a lens. 2. A shake amount detecting device for detecting a shake amount of a camera, a shake correcting device for correcting shake based on an output of the shake amount detecting device, a zoom lens capable of zooming operation, and the zooming device. A shake correction camera, comprising: a control device that controls the shake correction device not to be driven during a zooming operation of a lens. 3. The shake correction camera according to claim 1, further comprising a drive motor for driving the variable power lens, wherein the variable power operation is performed by using the drive motor.