JPH09105972A - Optical device with shake correcting function - Google Patents

Optical device with shake correcting function

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Publication number
JPH09105972A
JPH09105972A JP24342996A JP24342996A JPH09105972A JP H09105972 A JPH09105972 A JP H09105972A JP 24342996 A JP24342996 A JP 24342996A JP 24342996 A JP24342996 A JP 24342996A JP H09105972 A JPH09105972 A JP H09105972A
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JP
Japan
Prior art keywords
step
data
blur
lens
amount
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP24342996A
Other languages
Japanese (ja)
Other versions
JP2953398B2 (en
Inventor
Masataka Hamada
Hisayuki Masumoto
Naoshi Okada
Hiroshi Otsuka
久幸 升本
博司 大塚
尚士 岡田
正隆 浜田
Original Assignee
Minolta Co Ltd
ミノルタ株式会社
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Application filed by Minolta Co Ltd, ミノルタ株式会社 filed Critical Minolta Co Ltd
Priority to JP24342996A priority Critical patent/JP2953398B2/en
Publication of JPH09105972A publication Critical patent/JPH09105972A/en
Application granted granted Critical
Publication of JP2953398B2 publication Critical patent/JP2953398B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Abstract

PROBLEM TO BE SOLVED: To provide an optical device capable of preventing a follow-up delay in a shake correcting control and capable of appropriately correcting the shake. SOLUTION: As for a lens control, first of all, a lens correcting amount is calculated (#2090). Then, as for lens correcting amounts ΔLX and ΔLY, for example, a linear prediction control is executed so as to predict the next shake amount. Next, the shake correcting amounts ΔLX and ΔLY are outputted to a pulse motor control circuit (#2095). The correction is executed based on the outputted correcting amount, then, it is decided which switch is turned off among correction limit switches Sx1 to Sy2 , and then, shake limit data is set in the case the swtich is turned on (#2100 and #2105).

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical device such as a camera, and more particularly to an optical device with a blur correction function for correcting blur of an object image formed by an optical system.

[0002]

2. Description of the Related Art An optical device, particularly a camera, having a blur correction function for detecting the degree of blur and correcting the blur of a subject image based on the detection result has been conventionally proposed. As one example thereof, there is known one in which an angular velocity sensor or the like detects camera vibration, so-called camera shake, and displaces a part of optical elements of a photographing optical system to correct an image shake. In this type of camera, an optical element for calculating the blur amount of the subject image on the imaging surface from the output of the angular velocity sensor using the optical condition of the photographing optical system and the subject distance, and further correcting the blur from the image blur amount. The displacement amount of is calculated. Then, the image blur is corrected by driving the optical element based on the calculated displacement amount.

[0003]

By the way, in the camera with a blur correction function as described above, the blur correction is performed through operations such as camera shake detection, image blur amount calculation, displacement amount calculation, and optical element driving. When the blur correction optical element is actually driven, the subject image has already moved to a different position. As described above, the conventional camera with the blur correction function has a problem that the blur correction control does not properly follow the image blur of the subject image. In addition,
This problem is not limited to the detection method and correction method described above,
It occurs in everything that has a time lag from the detection of blurring to the correction. Moreover, similar problems occur not only in cameras but also in other optical devices having a shake correction function.

The present invention has been made in view of the above problems, and it is an object of the present invention to provide an optical device capable of preventing a follow-up delay in the blur correction control and performing a proper blur correction. And

[0005]

According to a first aspect of the present invention, an optical device for collecting light from an object and forming an image of the object by an optical system is a detection device for detecting the degree of blurring of the optical device. Means, a correction means for correcting the blurring of the object image based on the blurring amount data detected by the detecting means, and a plurality of blurring amount data obtained by repeatedly performing the blurring detecting operation. And a control means for controlling the correction means so as to correct the blur of the object amount based on the predicted blur amount data obtained by the predicting means.

In the optical device according to the first aspect of the present invention, the blurring amount data which will occur thereafter is predicted based on the plurality of blurring amount data obtained by repeatedly performing the blurring detecting operation, and the predicted blurring amount data is obtained. Image blur is corrected based on. Since the subsequent blur amount data is predicted in this way, it is possible to prevent a tracking delay in the blur correction control.

According to a second aspect of the present invention, in the optical device according to the first aspect, the correction means according to the first aspect is arranged in the optical system and is displaceable for correcting the blur of the object image, and the calculated blur amount data is used. Drive means for driving the optical element based on the above.

In the optical device according to the third aspect, the predicting means according to the first aspect predicts subsequent blur amount data from a plurality of blur amount data by linear prediction.

According to a fourth aspect of the present invention, in the optical device with a blur correction function, the optical device according to the first to third aspects forms a subject image by condensing light from the subject by the imaging optical system. Is a camera for capturing images.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. In the following description,
The entire system including not only the system of the present invention but also parts and other functions not directly related to the present invention will be described.

FIG. 1 is a schematic perspective view of a camera having a camera shake detection sensor according to the present invention. Referring to FIG.
The camera according to the present invention includes a camera body 1 and an interchangeable lens 2 provided on the camera body 1 in an exchangeable manner. The camera body 1 includes an X-direction camera shake sensor S x that detects a camera shake amount in the X direction and a Y sensor that detects a camera shake amount in the Y direction.
And direction with Dinner shake sensor S y, X, Y direction shake sensor S x, the display unit D for issuing a warning when S y is not in operation
ISP 1 and.

FIG. 2 is a circuit block diagram of the camera of this embodiment. Referring to FIG. 1, the camera according to the present invention is
It includes a microcomputer (hereinafter referred to as “microcomputer”) μC for controlling the entire camera and performing various calculations. A focus detection circuit AFct for performing focus detection is connected to the microcomputer μC. The focus detection circuit AFct includes a CCD, an integration control circuit, and an A / D conversion circuit. The focus detection circuit AFct obtains information about a subject in a distance measurement area described later, A / D-converts the information, and outputs the information to the microcomputer μC. The main parts shown in the circuit block of the camera according to the present invention will be described below.

The photometric circuit LM is connected to two areas described later.
And perform photometry, and A / D convert the photometric value to Myco
Output as brightness information to the μC. Display control circuit DIS
The PC inputs the display control signal from the microcomputer μC
Display on the top of the main body DISP 1And the table in the finder
Indicator DISPTwoTo display a predetermined display. Camera shake detection
The device BL is a camera shake as will be described later in detail.
Perform detection.

The microcomputer μC includes an electronic flash device ST, a dimming circuit for receiving reflected light of a subject at the time of flash light emission that has passed through a photographing lens (not shown), and stopping the flash light emission when an appropriate exposure amount is reached. A lens that outputs information specific to the STC and the interchangeable lens to the microcomputer μC of the camera and drives a correction actuator (a pulse motor in this embodiment) described later based on a correction amount for camera shake correction sent from the camera. The lens circuit LE provided in the. The microcomputer μC has a lens drive control circuit LECN for driving the photographing lens based on the focus detection information, a shutter control circuit TV CT for controlling the shutter based on a control signal from the microcomputer μC, and a control signal from the microcomputer μC. A diaphragm control circuit AV CT for controlling the diaphragm, a motor control circuit MD for winding and controlling the film based on a control signal from the microcomputer μC, a battery E as a power source, a backflow prevention diode D 1 , and a microcomputer μC for backup. A large-capacity capacitor C BU , a power supply transistor Tr1 for supplying power to a part of the circuit described above, and a field effect switch FET for supplying power to a motor for image stabilization.
(Tr2) is connected.

Next, the switches will be described. The metering switch S1 is an autofocus (hereinafter referred to as "AF")
It is operated to perform the operation of the camera including the operation (for example, photometry and display of various data), and it is turned on by pressing the first stroke of the release button (not shown). When the photometric switch S1 is turned on, the microcomputer μC executes the INT 1 interrupt flow of FIG. 6 described later. The main switch S M is a switch that enables the camera when turned on. An interrupt SMINT, which will be described later, is executed by turning the switch from OFF to ON or from ON to OFF. The switch S IHBL is a switch for inhibiting camera shake correction, and the switch S SP is a switch for switching the photometric mode (spot / average).
The release switch S2 is a switch operated when performing a shooting operation, and is turned on by pressing the second stroke (deeper than the first stroke) of the release button. The switch X is a so-called X contact, which is turned on when the first curtain operation of the shutter is completed, and is turned off when a release member (not shown) is charged.

FIG. 3 shows that the main switch S M is turned ON to OFF.
Interrupt SM executed from F or OFF to ON
It is a flowchart which shows INT. Referring to FIG.
When this interrupt is generated, the microcomputer μC first resets (0) all flags and data (step # 5) (steps will be omitted hereinafter). And the main switch S M is ON
If ON, data is input from the lens (# 10, # 15). As data, Enter

FIG. 4A is a flow chart showing a data input subroutine of the portion indicated by # 15 in FIG. Referring to FIG. 4A, in the data input subroutine, data indicating mode (I) (data input) is set (# 180), the potential of terminal CSLE is set to L level (# 182), and the above-mentioned setting is performed. Output the data (# 18
5) Then, the data such as the focal length f is input from the lens side (# 190), and the potential of the terminal CSLE is set to the H level (# 195). Here, the mode (I) is a control mode to the lens, the subroutine LESI0 (I) represents data input to the camera side as described in FIG. 4A, and LESI0 shown in FIG. 4B. (II) represents a mode (II) indicating data output from the camera.

Returning to the flow chart of FIG. 3, it is judged based on the data inputted from the lens side whether or not the lens is mounted (# 20). If the lens is mounted, the transistor Tr2 is turned on. The potential of the terminal PW1 is set to H level (# 25). As a result, power is supplied to the camera shake correction drive motor. Data for resetting the image stabilization lens is set, and the subroutine LES
Data is output to the lens by the I0 (II) subroutine (# 35). As the output data, There is.

The LESI0 (II) subroutine for outputting data from the camera body side to the lens side will be described with reference to FIG. 4 (B). First, the mode (I) data is reset (# 200), the voltage of the terminal CSLE is set to the L level (# 202), and the above mode signal mode (II) is output (# 205). Thereafter, the output data is output (# 210), the potential of terminal CSLE is set to the H level (# 215), and the program returns.

Next, proceeding to # 42 in FIG. 3, (here, # 2
The program proceeds even if it is determined that there is no lens at 0), the timer T is reset and started, the timer F1 which is a flag indicating this is set, and the potential of the terminal CHST is set so as to start the strobe boosting. Set to H level (#
40- # 45). Next, it is determined whether or not the camera shake correction prohibition detection switch is turned on (# 50). If the correction prohibition detection switch is turned on (correction prohibited), display prohibition data is set (# 55), and this data is It is output to the display control circuit (# 60), whereby the display indicating that the image stabilization is being performed is turned off. After that, wait until the value of timer T reaches T2 (about 5 minutes) (# 65), and the program proceeds to step # 1.
Go to 25. In step # 125, the strobe boosting is stopped, the potential of the terminal CHST is set to L level, the angular velocity monitor ON data is reset, this signal is output to the shake detection device BL, and the motor is turned off (# 125 to # 13).
5). Then, the power supply transistors Tr2 and Tr1 are turned off.
Then, the display data is set, this is output to the display circuit to turn off the display, the timer flag (timer F) is reset, and the microcomputer stops its operation (# 140 to # 14).
8).

If the correction inhibition switch is not turned on in step # 50, the program proceeds to step # 70.
Then, the data setting for turning on the angular velocity monitor is performed, the sensor mode is set to A, this data is set, and the data is output to the camera shake detector BL (# 70 to # 8).
0). Here, there are A and B in the sensor mode. In the sensor mode A, the angular velocity monitor for camera shake detection is turned on only for a fixed time, and in the sensor mode B, the angular velocity sensor is turned on all the time. In this way, two types of sensor modes are provided in order to reduce current consumption and to activate the angular velocity sensor only when necessary such as during photographing.

Next, the camera shake detector B shown in step # 80.
Subroutine BLSIO (I) showing data output to L
The contents of the subroutine will be described. The data output here include: angular velocity monitor: ON / OFF sensor mode: A, B, OFF focal length: f subject distance data: DV.

FIG. 4C is a flow chart showing this subroutine. Referring to FIG. 4C, in the BLSIO (I) subroutine for outputting data to the camera shake detection device, first, the data mode is set to the mode (I) which is the data input mode, and the potential of the terminal CSBL is set to L.
The level is set (# 220, # 222), and this data is first output (# 225). Next, the above-mentioned angular velocity monitor
Data indicating whether N or OFF is output, and the terminal CS
The potential of BL is set to H level, and the program returns (# 230, # 235).

Next, returning to the flow chart of FIG. 3, the angular velocity sensor stabilizes, waits for a time for measurement, and inputs the data (# 85, # 90). As the data output from this camera side, There is.

FIG. 4D is a flow chart showing a subroutine BLSIO (II) for outputting the amount of blurring from the camera to the lens side in step # 90 of FIG. FIG.
Referring to (D), subroutine BLSI0 (II)
Resets the data of the mode (I) (corrects to the mode (II) representing the data output), sets the potential of the terminal CSBL to the L level, and first outputs this data (# 240).
~ # 245). Then, the data from the shake detection device BL is input from the microcomputer μC, the potential of the terminal CSBL is set to H level, and the program returns (# 250, # 25).
5).

Next, returning to the flowchart of FIG. 3, it is determined whether the timer T is equal to or longer than T1 (about 7 seconds corresponding to the time for the angular velocity sensor to stabilize), and if T ≧ T1, the angular velocity sensor is stable. The flag indicating that this is detected (OKF) is set, the data indicating the WAIT display is reset, and the data is output to the display circuit (# 1
00- # 110).

The reason for waiting for the angular velocity sensor to stabilize is that when power is supplied to the sensor, data indicating the correct shake amount is not immediately output. This is especially the case when a vibration type angular velocity sensor is used.

The time required to stabilize the output of the angular velocity sensor when the power is turned on is shown in FIGS. 5 (A) and 5 (B). FIG.
In (A), it takes about 1 second until the output stabilizes after the power is turned on, but in the example of FIG. 5B, it takes about 8 seconds until the output stabilizes. In consideration of the level to be used, a maximum waiting time of 7 seconds is set in the present invention.

Next, returning to the flow chart of FIG. 3, when the timer reaches T = T2, the camera is turned off so that detection O
KF is reset, and the flow from step # 125 described above is executed (# 115, # 120) step # 9
5, when the timer T has not reached T1, the program proceeds to step # 125 and the system is operated for 500 m.
WAIT for seconds, t = T1-T, set WAIT display data, output the t and WAIT display data to the display control circuit, and the program proceeds to step # 75 (# 155 to # 170).

As described above, according to the present invention, steps # 95 to # 110 and step # 155.
~ Main switch SM as shown in step # 170
Until the time T1 when the angular velocity sensor stabilizes after the ON is turned on, a display indicating that the image is to be waited is displayed, and after the time when the angular velocity sensor stabilizes, the display is reset. As a result, the photographer can determine whether or not the angular velocity sensor that detects camera shake is operating, and therefore, the camera will not shoot when the camera shake detection sensor is not operating, and as a result, a blurred image will not be taken. .

Next, a program executed when the photometric switch S1 is turned on will be described. 6 and 7 are flowcharts showing a program executed when the photometric switch S1 is turned on. First, the potential of the FLOK terminal indicating that flash light emission is possible is set to L, and all display data is reset. (# 260, # 265). Next, it is determined whether or not the main switch S M is ON, and if it is OFF, the microcomputer μC is stopped (# 275). If it is ON,
The transistor T r 1 is turned on to supply power to the circuit for photometry, AF, etc., the flag AFEF indicating focus is reset, and the flag MDF indicating that the amount of camera shake after focus is large is reset. It is determined whether or not it is turned on (# 280 to # 290). Step # 290
When the correction inhibition switch S IHBL is turned on, the program proceeds to step # 475 to set display inhibition data, proceeds to step # 395, and executes the subsequent steps (# 475). The details will be described later. If the correction inhibition switch is OFF in step # 290, the program proceeds to step # 295, and it is determined whether or not the flag indicating that the angular velocity sensor indicates detection OK, detection OKF is set, and if it is set, The program proceeds to step # 300 to set the monitor ON data. Subsequently, a flag indicating that the sensor is in the A mode is set, this data is output to the camera shake detection device BL, WAIT is performed for a fixed time (10 msec), and then data of the camera shake amount is input from the detection device BL. The program proceeds to step # 395 (# 305- # 320). Originally, for the purpose of correcting camera shake during exposure, the operation of the camera shake detection sensor should be started after the release switch S2 is turned on. However, as shown in this flow, the camera shake detection apparatus is operated before the release switch S2 is turned on. By turning on the switch, the rise time can be shortened. If the detection OK flag indicating that the angular velocity sensor has detected OK is not set in step # 295, that is, if the sensor is not stable, data indicating that the monitor is ON and data indicating that the sensor is in mode A are set. Then, this data is used for the camera shake detection device B.
It is output to L, the display inhibition data is reset, and the data is input from the lens (# 330 to # 345). From this data it is determined whether the lens is attached,
If it is attached, the transistor Tr2 is turned on to supply power to the correction motor on the lens side, the lens mode is reset, this is output to the lens side, and the program proceeds to step # 370 (# 350 to # 350). 365). The program proceeds to step # 370 even when the lens is not attached in step # 360.

At step # 370, it is determined whether or not the timer flag is set, and if it is set, the program proceeds to step # 376. When the timer flag is not set, the timer flag is set, the timer T is reset and started, and the program proceeds to step # 376 (# 370 to # 374). Step # 3
At 76, it is determined whether the timer T is T1 or more.
If T ≧ T1, the detection OK flag is set, and WA
The IT display is reset and the program proceeds to step # 39.
5 (steps # 376 to # 385). On the other hand, T <T
If it is 1, it is assumed that the angular velocity sensor is not stable, and t
= T1-T is calculated, the WAIT display data is set, and the program proceeds to step # 395.

In step # 395, data is input from the lens, photometry is performed to perform AF, and exposure calculation (AE calculation) is performed based on the photometric data to determine the aperture and shutter speed (# 400 to # 410). ). Each of these subroutines will be described later.

As described above, according to the present invention, as shown in steps # 376 to # 390, even in the interruption flow when the photometric switch is turned on, the angular velocity sensor is stabilized after the photometric switch is turned on. Time to do T1
Before the time elapses, the WAIT display is displayed on the display unit of the camera, and after the time when the angular velocity sensor stabilizes, the display is reset. Therefore, as described above, before the camera shake detection sensor stabilizes, it is displayed that the camera shake detection sensor is not stable, so the photographer does not perform shooting in such a state. As a result, it is possible to provide a camera that can take a photograph without causing camera shake.

In the present invention, step # 32
As shown in 5, when the detection OK flag indicating that the camera shake detection is possible is NO, the ON data set of the camera shake detection monitor is performed. Therefore, the sensor circuit of the camera shake detection device is turned on at the same time when the photometric switch is turned on.
Is done.

Next, the photometric subroutine shown in step # 400 of FIG. 7 will be described with reference to FIG. The photometric pattern viewed from the viewfinder is shown in FIG. As shown in FIG. 8B, the photometric pattern is composed of two areas, that is, a spot photometric area BV SP at the center and a peripheral photometric area BV AM around it. The photometric values from each area are BV SP and BV AM .

Referring to FIG. 8A, first, the data of the photometric values BV SP and BV AM of each area are input, and it is determined whether or not the spot photometric switch is turned on, and the spot photometric switch is turned on.
If not, set the photometric value BV to (BV AM + BV SP ) /
The program returns as 2 (# 480- # 49
0). On the other hand, when the spot metering switch is turned on in step # 485, whether or not the amount of camera shake is large is determined from the data input from the camera shake detection device BL. When the amount of camera shake is large, the program returns without updating the data, and when the amount of camera shake is small, the measured value B
BV SP is substituted for V and the program returns (#
495- # 500). The reason why the data is not updated when the amount of camera shake is large is to prevent the shift of the photometric value caused by the shift of the photometric range due to a momentary blur.

Next, the AF shown in step # 405 of FIG.
The subroutine will be described. FIG. 9 is a flowchart showing the contents of the AF subroutine. Referring to FIG. 9, CCD integration is first performed, data is input, and the current defocus amount DF1 is calculated based on the input DF amount for driving the lens (# 505 to # 515). In step # 520, it is determined whether or not a flag MDF indicating that the amount of camera shake after focusing is large is set. When the MDF is set, the program directly returns (# 520). As a result, when the amount of camera shake after focusing is large, the moving body determination is prohibited and the AF lock is performed. The reason for this is that if the amount of camera shake is large, A
This is because the F information is unreliable.

On the other hand, when the flag MDF is not set in step # 520, it is determined whether or not the flag AFEF indicating the focus is set (# 525). If it is not set, it is determined whether or not the amount of camera shake is large (# 530). If the amount of camera shake is large, the reliability is considered to be low and the program returns without driving the lens. If the amount of camera shake is not large in step # 530, the obtained defocus amount DF1 is set as the defocus amount DF for driving the lens. If it is not less than the predetermined value, the DF amount is multiplied by the lens drive amount conversion coefficient. Then, the lens drive amount is obtained, the lens is driven, and the program returns (# 535, # 540, # 555,
# 560). When DF, which is the defocus amount for driving the lens, is equal to or less than the predetermined value in step # 540, the flag AFEF indicating the focus is set, N = 0 is set, and the program returns (# 545, # 550).

When the flag AFEF indicating the focus is set in step # 525, the program proceeds to step # 570 to set the current defocus amount DF1 to DF2. Then, whether or not the amount of camera shake is large is determined based on the data input from the camera shake detection device BL (# 5
80). If the amount of camera shake is large in step # 580,
A flag MDF indicating this is set and the program returns (# 585). On the other hand, if the amount of camera shake is not large in step # 580, it is determined whether N is 2 or more. If N <2, it cannot be determined that there is two pieces of focus input data, and therefore the program returns (steps # 587 and # 590). If N ≧ 2 in step # 587, the difference in defocus amount between the previous time and this time is calculated, and it is determined whether this difference exceeds a predetermined value (KΔDF). If it does not exceed the threshold, the program returns as a non-moving object (# 595, # 600). If it exceeds, the defocus amount is set to DF = DF1 + ΔDF, and the program proceeds to step # 555 to drive the lens (#
605).

Next, an example of the AE operation subroutine and the AE program diagram shown in step # 410 of FIG. 7 will be described with reference to FIGS. In the present embodiment, the subject is discriminated by the photographing magnification data.

Β> 1/10: Macro photography β ≦ 1/200: Landscape photography 1/40 ≧ β> 1/100: Person photography is determined.

It is assumed that the intermediate photographing magnification cannot be said to be the case-specific photographing. And β> 1 /
When 10, β ≦ 1/200, the aperture is narrowed down from the open aperture value of about 2 EV or 3 EV, and the drawing performance is improved. Especially considering landscape photography, the depth is taken into consideration. 1
When / 40 ≧ β> 1/100, the open aperture value is set as the control aperture value in order to reduce the depth in person shooting and reduce camera shake in person shooting.

Further, in the present embodiment, it is determined whether or not the subject is a moving body, and if it is a moving body, the shutter speed is also added to the above-described aperture-priority program AE diagram so that the subject does not shake. The adopted AE diagram is adopted.

In FIG. 10, the film sensitivity SV is read, the focal length f and the distance information DV input from the lens are read.
From this, the shooting magnification β is calculated, and the shutter speed TVf that is highly likely to cause camera shake is obtained from the focal length f (# 610 to # 620). Next, it is determined whether or not camera shake detection is possible, and if possible, the detection OK flag is set, and in order to extend the camera shake limit shutter speed assuming that camera shake correction is possible, the shutter speed is set to TVf = TV.
If it is f-3, and if it is not possible, nothing is done and the process proceeds to step # 635 (# 625, # 630). It is conventionally said that it is better to use the shutter speed that is determined now or the camera shake limit shutter speed, whichever is shorter, so that a blurred photograph does not occur. This camera shake limit shutter speed is slowed down by the above steps.
In step # 635, it is determined whether or not the open F value AV O of the lens is AV O ≧ 5 (# 365). If the lens open F value AV O ≧ 5, the aperture change amount ΔAV = 2, and if AV O <5, the change amount ΔAV = 3, and the program proceeds to step # 646. here,
Brightness value BV is the BV = BV O + AV O, exposure value EV
Is set to EV = BV + SV (# 646, # 647).

After obtaining the exposure value EV, the photographing magnification β is judged (# 655), β> 1/10, or β ≦ 1/2.
00, the program proceeds to step # 670. 1
/ 20 ≦ β <1/40 or 1/100 ≧ β> 1/2
If 00, the program proceeds to step 670 with the aperture correction amount ΔAV set to ΔAV / 2. 1/40 ≧ β1 / 10
When it is 0, the aperture correction amount ΔAV is set to 0 and the program proceeds to step # 670 (# 655 to # 665). In step # 670, the shutter speed TV is TV = EV.
It is calculated by − (AV O + ΔAV). Step # 675
When the flag FLF indicating flash photography is set at, the program proceeds to step # 770. If the flag FLF is not set, the program is #
Proceeding to 680, it is determined whether or not the calculated shutter speed TV is equal to or lower than the camera shake possibility speed TVf (# 68).
0). If TV ≦ TVf, the aperture AV is AV = EV−
TVf is obtained, and TV = TVf (# 68
5, 687).

Next, it is determined whether or not the aperture AV is AV <AV O (# 690). When AV <AV O ,
AV = AV O and shutter speed TV is EV-A
Set to V O (# 700), the program proceeds to step # 7.
Go to 05. Then, TV and AV obtained by the calculation are set as the control shutter speed TV C and the aperture value V C , the release lock determination described later is performed, and the program returns (# 690 to # 715). When AV ≧ AV O in step # 690, the program proceeds to step # 705 without doing anything.

At step # 680, TV> TVf
If so, the program proceeds to step # 717, and the flag MDF set when the shake amount is large in the moving body determination.
Is set or not. When this is set, that is, when MDF = 1 or 2
When the change amount ΔDF of the defocus amount for each time is equal to or smaller than the predetermined value, it is determined that the subject is not a moving body, and the program proceeds to step # 738. Flag MDF in step # 717
If is not set, defocus change amount ΔD
When F exceeds a predetermined value KΔDF, it is determined that the subject is a moving body, and the aperture is determined as AV = (1/2) · EV-2.5 (# 725). In this way, when the subject is a moving object, the aperture value becomes the open side by subtracting the aperture value from the predetermined value. As a result, the shutter speed becomes faster.
Next, at step # 730, the aperture AV is AV ≧ AV O
It is determined whether or not + ΔAV, and AV ≧ AV O + ΔA
If V, the obtained shutter speed is slower than the value obtained by AV = AV O + ΔAV even if the subject is a moving body. Therefore, the program proceeds to step # 735, where AV = AV O + ΔAV, and proceeds to step # 740.

On the other hand, in step # 730, AV <AV O + Δ
If it is AV, the program proceeds to step # 731 to increase the shutter speed. Therefore, the aperture F value AV
Shutter speed T which is a turning point for narrowing down from O
Seeking V d as TV d = AV O +5, obtains the shutter speed TV in TV = EV-AV O (♯731 , ♯7
33). And this obtained shutter speed is TV d
It is determined whether or not the above is satisfied (# 735), and TV ≧ TV
If d , TV = (1/2) · EV-2.5 (# 737), and if TV <TV d , AV = AV O (# 736), and the program proceeds to step # 740. .

The aperture values shown in FIGS. 10 to 14 to be described later are
TV <TVdIf so, AV = AV OIs determined by TV ≧
TVdAnd AV <AVOAV if + ΔAV
= (1/2) · EV-2.5, AV ≧ AVO+ ΔAV
If so, AV = AVOThe aperture value is determined by + ΔAV. Shi
Chatterspeed TV can be obtained by TV = EV-AV.

In step # 740, the shutter speed TV is calculated by TV = EV-AV, and it is determined whether or not this TV is higher than the maximum shutter speed TVmax (# 745). If TV is not larger than TVmax,
The program proceeds to # 705. When TV is larger than TVmax, the aperture value AV is set to AV with TV = TVmax.
= EV-TVmax. It is determined whether the aperture value AV is larger than the maximum aperture value TVmax (# 75
0- # 760). If AV> AVmax, AV = A
Vmax is set, and the program proceeds to step # 705.
If AV ≦ AVmax, the program immediately proceeds to step # 705.

At step # 675, if the flag FLF indicating flash photography is set, the program proceeds to step 770 to set the shutter speed TV.
It is determined whether the shutter speed is TVf. If TV ≦ TVf, it is determined whether or not the above TVf and the flash emission tuning maximum speed TVx are larger (# 770, # 775). If TVf> TVx, then TV = TVx, and if TVf≤TVx, then TV = T.
Vf is set, and a fast shutter speed that does not cause camera shake is set, and the aperture is opened so that the flash light becomes far or the amount decreases (# 780,
# 785). From both steps # 780 and # 785, the program proceeds to step # 790, and the aperture AV is calculated by AV = EV-TV (# 790). Next, the aperture value AV obtained in step # 795 is the maximum aperture value AV
It is determined whether or not it is smaller than O , and if AV <AV O , AV = AV O and the program proceeds to step # 705.
Proceed to. On the other hand, if AV ≧ AV O in step # 795, it is determined whether AV is larger than the maximum aperture value AVmax (# 805). If AV> AVmax, A
The program proceeds to step # 705 with V = AVmax. If AV ≦ AVmax in step # 805,
The program proceeds to step # 705 without doing anything. In step # 770, if TV> TVf, it is determined whether or not it is greater than the tuning maximum shutter speed TVx,
If larger, TV = TVx and the program is step #
790 (# 815, # 820), step # 81
If TV≤TVx in 5, the program proceeds to step # 705.

13 and 14, the lens focal length and open F value are 35 mm / f4 and 200 mm / f, respectively.
The program diagram of the AE for the case at 5.6 is shown. In both figures, the value of the shutter speed TV is taken on the X axis and the value of the aperture value AV is taken on the Y axis, and the mutual relationship is shown with the exposure value as a parameter.

Next, the release switch shown at # 715 in FIG.
The clock determination subroutine will be described with reference to FIG. Figure
First, referring to 15, flag LE indicating release lock
LF and a flag FLF indicating flash emission are respectively set.
It is reset and the distance DV input from the lens is 10m.
It is determined whether or not it exceeds (# 830 to # 840). photograph
When the distance DV exceeds 10 m, it is assumed that it is not a person shooting.
Flash does not fire. Subject distance DV is 10
When it exceeds m, control shutter speed TV CIs a hand
If the speed is more than TVf, or the image stabilization is
When it is prohibited or when camera shake detection is possible
Release (when the detection OK flag is 1), the release lock
Without executing the
Returns (# 845 to # 855, # 865).

In steps # 845 to # 855, if the control shutter speed TV C is less than the camera shake possibility speed TVf, and the camera shake cannot be detected in the non-correction prohibition mode, it is considered that the camera shake is likely to occur, and the release is performed. The lock flag LECF is set (# 86
0), the program proceeds to step # 865.

In step # 840, the distance DV is 10
When m or less, the program proceeds to # 870, and it is determined whether or not the subject brightness BV ≦ 2. If the brightness BV ≦ 2 in step # 870, stroboscopic photography is performed to give contrast to the subject. A signal indicating whether or not charging of the main capacitor of the flash is completed is input from the flash unit FL, and if charging is completed, a flag FLF indicating flash emission is set, and the terminal FLOK of the terminal FLOK is set to permit it. The potential is set to H and the program proceeds to step # 865. On the other hand, if charging is not completed in step # 875, the program proceeds to step # 860 and the flag LECF indicating the release lock is set. If brightness BV> 2 in step # 870, shooting is performed without a flash. Therefore,
The program proceeds to step # 845 and step # 84
The flow after 5 is executed.

Next, the contents displayed in the display SIO subroutine will be described with reference to FIGS. 16 (A) and 16 (B). 16A shows the display in the finder (corresponding to DISP 2 in FIG. 2), and FIG. 16B corresponds to the external display in DISP 1 in FIG. 1. In the figure, a indicates whether or not the release lock is present. When it is displayed, it indicates that the camera is in the release lock state, b is displayed when the image stabilization is not prohibited, and blinks when the image stabilization is not successful as a result of the correction. Charging is completed at the time of shooting, d, e, f, and g indicate control shutter speed and aperture value, h is displayed when the angular velocity sensor is not stable, and i is its waiting time. When the calculation is completed, the program will be
Then, returning to FIG. 7, it is determined whether or not release switch S2 is turned on (# 420). If not, the program proceeds to step # 405. If release switch S2 is turned on in step # 420, it is determined whether or not release lock is set (# 425). If it is release lock (LELF = 1), the program proceeds to step # 445. If it is not release lock in step # 425 (LELF = 0), exposure control is performed (# 430) and the film is wound up one frame (# 43).
5) Wait until the photometric switch S1 is turned off (# 4
40). If the photometric switch S1 is turned off in step # 440, the program proceeds to step # 445. The details of the exposure control shown in step 430 will be described later. At step # 445, the photometric switch S1 is turned off.
Whether it is FF or not is determined, and if it is ON, the power source holding timer TA is reset and started (# 450), and the program proceeds to step # 295. If the photometric switch S1 is off in step # 445, the program proceeds to step # 455, and it is determined whether or not the power supply hold timer TA has reached 5 seconds or longer (# 455). If the timer is less than 5 seconds, the program proceeds to step # 29.
Go to 5. If the timer has elapsed for 5 seconds or longer in step # 455, it is determined whether or not the correction inhibition switch is off (# 460). If it is on, the program proceeds to # 125 (see FIG. 3). , Stop control is performed. If the correction is not prohibited in step # 460, the program proceeds to step # 465 to determine whether or not the power supply hold timer TA has passed T3 (1 minute) or more.
If the elapsed time of the timer is less than T3 in step # 465, the terminal PW is turned off to turn off the power supply to the photometry circuit and the like.
The potential of 1 is set to L, and it waits until T3 is reached (# 465,
# 470). If T3 or more, step # shown in FIG.
Proceeding to 125, stop control is performed.

Next, the AE shown in step # 430 of FIG.
The control subroutine will be described with reference to FIG. 16 (C) and FIG. First, it is detected whether or not the correction prohibit mode is set (# 890). If the correction prohibit mode is not set, the sensor mode of the shake detection device BL is set to mode B (continuous mode), and this data is output to the shake detection device BL. Time required for detecting device BL to input blur data (10 m
Seconds) (# 891 to # 895). Next, in order to input this data, data communication is performed with the shake detection device BL (#
897). Next, in order to perform mirror up, a mirror up magnet (not shown) is turned on, and aperture control is performed based on the control aperture value AV C (# 899, # 901). Then, the lens control mode data is turned off, and data communication (II) is performed with the lens to output the blur amount data and data such as this mode data to the lens, and it is determined whether or not the mirror-up is completed. Yes (# 903- # 9
10). If the mirror-up is not completed, the shake amount data is input from the shake detecting device BL, and the program proceeds to step # 905 to output the shake amount data to the lens side (# 915). When mirror up is completed (S MUP is ON) in step # 910, the program proceeds to step # 920, and data is input from the blur detection device BL (# 920). Based on this data, it is determined whether or not the blur amount is large (# 925). The reason for making such a program is as follows. The amount of blurring due to operation of the release button and the amount of blurring due to release control such as aperture control and mirror control increase. In order to reduce the blur amount during such exposure, the blur amount at this time is detected, and when the blur amount is large, release is prohibited until the blur amount becomes small. In step # 925,
If it is determined that the shake amount is large, data is communicated with the lens when the shake amount data is output to the lens, and the program returns to # 920 after waiting for the shake amount to decrease (# 930, # 935). . In step # 925, when the amount of blurring becomes small, the program proceeds to step # 9.
In step 40, the lens mode is set to the release mode and this data is output to the lens (# 945). Then, the film sensitivity data SV is output to the light control circuit as analog data via the D / A converter. The real time T C is calculated from the control shutter speed TV C (# 955), the locking magnet on the front curtain of the shutter is turned off, and the exposure time timer T is set.
Are reset and started (# 950 to # 960). Then, the real time T C is compared with the current time T, and (T C
It is determined whether T) is larger than a predetermined value K T (#
970). This K T is a little longer than the time required for each data communication between the blur detection device BL and the lens. If it is shorter than this, it is determined that accurate exposure time control cannot be performed, and the program proceeds to step # 975. move on. It is determined whether the exposure time timer T has reached the real time T C (# 975), and if T ≠ T C , the program proceeds to step # 970. If T = T C , the program proceeds to step # 977. In step ♯970, if (T C -T)> K T , shake detector BL
The blur amount data is input, this is output as lens data, and the program proceeds to step # 975 (# 97
1, # 973), in step # 975, T = T C
Then, the program proceeds to step # 977, and the locking magnet of the rear curtain is turned off (# 977). The blur amount data is input from the blur detection device BL and is output to the lens (# 979 to # 981). At this time, although it depends on the traveling speed of the rear curtain and the speed of data communication, usually only one data communication to the lens is possible. Still,
As a result, even after the trailing curtain has run, the amount of blur correction is reduced until the exposure is completed. Then, after waiting for the time when the trailing curtain has completely traveled (5 msec), the data for turning off the sensor of the blur detection device BL is set, this data is output to the blur detection device BL, and the data is input from the lens. (# 983 to # 989), based on the input data, whether or not there is blur limit data (indicating that the compensation lens has reached the compensation limit) indicating whether or not the blur compensation of the lens has been performed. Judged (# 99
1). When the blur limit data exists in step # 991 (when the data is set), FIG. 16 (A)
The shake data for display is set to blink the symbol b of (# 993), and when the shake limit data is not set, the shake data for display is reset (# 995), and each program is Step # 99
Go to 7. Then, display data including this data is output to the display control circuit, and the program returns (# 99).
7).

If the correction prohibit mode is set in step # 890, the control relating to the blur correction is not performed, but only the data communication with the blur detection device, the data communication with the lens, and the exposure control are performed.
The microcomputer μC controls the exposure from 00 onward to # 1245, which is explained in the above-mentioned steps # 891 to # 9.
Since only necessary parts from 97 are used and are not particularly related to the present application, only the figures are shown and the description is omitted.

Next, with reference to FIGS. 18 to 22, a circuit block diagram of the blur detecting device BL, a specific example of the blur detecting device and a flow chart of a microcomputer for controlling the blur detecting device BL will be described.

Referring to FIG. 18, the circuit block diagram of shake detecting device BL includes a microcomputer μC3 for performing data communication with a microcomputer μC for controlling the entire circuit block and the entire camera and for calculating a shake amount. Sensor I, I
I is a monitor unit monitor I including an angular velocity sensor,
A sensor unit for detecting the output of the angular velocity obtained by II. The switch SW1 is a changeover switch that inputs one of the outputs of the sensors I and II to an A / D converter that performs A / D conversion. The transistors Tr3 and Tr4 supply power to the monitors I and II and the sensors I and II, respectively. The one-shot circuit OS outputs an H level until the motor is supplied with electric power and its output becomes stable.

FIG. 19 is a perspective view showing a tuning fork type angular velocity sensor used in the present invention. FIG. 20 is a block diagram showing a sensor unit and a monitor unit of the angular velocity sensor. FIG. 21 is a detailed circuit diagram of FIG. 19 to 2
1 is disclosed in US Pat. No. 4,671,112. The structure and circuit diagram of the angular velocity sensor shown in FIGS. 19 to 21 are not directly related to the content of the present invention, and therefore the description thereof is omitted.

FIG. 22 is a flow chart showing the sequence control of the blur detecting device BL and the operation of the microcomputer μC3 for calculating the blur amount detection. CSBL showing data communication
When the terminal voltage of is set to L, the flow of CSBL shown in FIG. 22 is executed by interruption. First, data communication is carried out once, and it is judged from this data whether or not the mode is the input mode. (# 1005, # 1010). When not in the input mode, data communication is performed to output data, and it is determined whether or not the sensor mode is the continuous mode, that is, the mode B (# 1120). If the sensor mode is not the B mode, it is determined that the continuous blur amount is not detected, and the detection is immediately stopped. If the sensor mode is the B mode, the program proceeds to step # 1065 to detect the shake amount, and the shake amount is detected (# 1115, # 112).
0). The data output here is the blur correction amount (Δ
X BL , ΔY BL ) and the amount of blur.

If it is determined in step # 1010 that the mode is the input mode, serial communication is performed to input data. The input data at this time is ON / OFF of the monitor of the angular velocity, A as the sensor mode,
B, OFF, focal length f, and subject distance data DV are included. Next, based on the input data whether the monitor is ON, if the monitor is ON, the transistor Tr3 is ON.
If it is OFF, the transistor Tr3 is turned OFF and the program proceeds to step 1035 (# 1020).
~ # 1030). In step # 1035 and thereafter, the sensor mode is determined, and if the sensor mode is the A mode,
If the terminal OPI is set to the H level for a certain period of time and the sensor mode is the mode B, in order to turn on the transistor Tr2,
The potential of terminal PW1 is set to H level, and the program proceeds to step # 1060 (# 1035 to # 105).
0). In step # 1055, the transistor Tr2 is turned off.
If it is F, the potential of the terminal PW1 is set to L level and the program is stopped (# 1055). Step # 1060
Now, wait for the sensor to stabilize, and the program proceeds to # 1065. In step # 1065, flag 1STF indicating the first data communication is set, and a signal for setting switch SW1 on the sensor I side is output (# 1070). A / D conversion is started, and a signal is input after waiting the time required for A / D conversion (# 107).
5 to # 1085). Next, at step # 1090, it is determined whether or not the flag 1STF indicating the first time is set, and if it is set, it is reset and the switch is switched to the sensor II side, and the program proceeds to step # 1075. Data is input (# 1105, #
1110). When the flag 1STF is not returned in step # 1090, the correction calculation is performed from the input sensor data, it is determined whether the sensor mode is the B mode, and if the B mode is selected, the shake detection is continuously performed. If the program is not in the B mode, the program stops (# 10).
95, # 1100).

In steps # 1065 to # 1110, data is read twice using the flag indicating the first time because the data to be read includes data in the X direction and Y direction. This is to enable reading of two data in one flowchart using this flag.

Next, the method of calculating the blur amount shown in step # 1095 of FIG. 22 will be described. Generally, when the taking lens is tilted by Δθ, the image movement ΔY on the film surface
Is represented by the following equation.

ΔY = f (1−β · tan Δθ) where f is the focal length of the taking lens, and β is the taking magnification.

Now, when Δθ is small, it can be approximated as follows. ΔY≈f (1−β · Δθ) Next, details of the calculation of the correction amount will be described. Now, the angular velocity outputs w 1 and w 2 for each detection timing Δt are obtained from the two angular velocity sensors. Next, the magnification β of the used subject is obtained based on the AF information of the camera body and the focal length information fi of the interchangeable lens. Focal length information fi and magnification β
And angular velocity outputs w 1 , w 2 , and Δt, the image blur amount ΔX,
ΔY is calculated by the microcomputer μC in the body based on the following equation.

ΔX≈fi · (1−β) · w 1 · Δt ΔY≈fi · (1−β) · w 2 · Δt As the magnification increases, the parallel blurring element increases and paraxial approximation is performed. The calculation may not satisfy (ΔY = f · tan θ).

Therefore, the term (1-β) is added in order to reduce the amount of blur obtained when the magnification is large.

As another embodiment, when β <1/15, ΔY = f · tan θ β ≧ 1/15 is considered to be ΔY = 0, and no correction is made when the magnification is large. May be.

FIG. 23 shows a flow chart of the correction calculation shown in step # 1095 of FIG. In FIG. 23, steps # 1130 to # 1140 correspond to the above Δt.
It is for seeking. Steps # 1145 to # 1
In 155, the shake amounts in the X direction and the Y direction are obtained as described above. Note that step # 1147,
In # 1148, the correction coefficients Kw 1 and Kw 2 are applied to the outputs w 1 and w 2 from the respective sensors in order to correct the error due to the dispersion of the individual angular velocity sensors.
Then, in # 1160 and # 1165, it is determined whether or not the correction amounts ΔX and ΔY are equal to or greater than a predetermined value KA, respectively.
If it is less than A, it is determined that the amount of blurring is small, data is set, and the process returns.

Next, the strobe circuit will be described with reference to FIG. The booster circuit D / D boosts a low voltage (battery voltage) to a high voltage and stores energy in the emission energy storage capacitor MC via the rectifying element D / S. The light emission control circuit EMC emits a flash light by an AND signal of a signal output when performing flash photography (the potential of the FLOK terminal described above is set to H) and an X signal that is turned ON when the one-curtain running is completed. Start. The light emission is stopped in response to the light emission stop signal STC.

The above-described booster circuit D / D boosts the voltage when the potential of the boosting control signal CHST from the microcomputer μC is H and there is a signal indicating that the charging is not completed (Tr D is OFF).

To detect the completion of charging, a series connection of a neon tube and a ladder resistor is connected in parallel to the capacitor MC, a transistor is connected to the ladder resistor portion, and when the capacitor reaches a predetermined voltage, the transistor Tr D turns on. By doing so.

Next, the circuit configuration on the lens side and the camera
The connection relationship will be described with reference to FIG. Figure 25 shows the lens
Description will be made based on the circuit on the side (zoom lens). lens
The microcomputer LμC is used for data communication with the camera and camera shake.
Drive control of motor control circuits MC1 and MC2 for correction
Perform The zoom encoder ZM is the focus of the zoom lens.
Detect the distance. The distance encoder DV indicates the distance. Electric
Source VCC2Motor control circuits MC1, MC2 and
And power is supplied to the two motors. Power path V DDBy
Power is supplied to other circuits. Pulse motor
Two motor control circuits MC1 and MC2 each having
A ground line GND2 is connected to the motor of.
The earth line GND1 is connected to the circuits other than the above.
I have.

Next, the switch connected to the microcomputer LμC will be described. For the lens side microcomputer LμC,
The left and right correction limit switches S X1 and S X2 in the X direction and the upper and lower correction limit switches S Y1 and S Y2 in the Y direction are connected, and are turned on when the lens drive unit hits the correction limits in the respective directions. . The terminal CSLE is an input terminal, and the lens microcomputer LμC executes an interrupt routine CSLE described later in response to an input signal from the camera side. Input terminals SCK, SIN
Inputs a clock signal for data transfer, respectively. The terminal SOUT is a terminal for outputting lens data.

From the camera microcomputer LμC to CSLE
When the interrupt signal of is input to the lens side, the interrupt routine shown in FIG. 26 is executed. Data is input from the 1-byte camera body side, and then the focal length f and the subject distance DV are read (# 2005-2015).

Data communication will be described here. The data communication includes a lens communication I that outputs lens data to the camera body side and a lens communication II that outputs data from the camera body to the lens side. Based on the input data, the communication I and II are determined (# 202).
0). If the lens communication is the output mode I, the data communication SIO is performed to output the predetermined data described in each output data, the shake limit data is reset, and the microcomputer stops (# 2025, # 2027). .
In the input mode (when NO in # 2020), the shake amounts ΔX and ΔY in the X and Y directions and the mode signal are input from the camera body side (# 2030). If the lens is reset in response to the mode signal, set control is performed and the microcomputer is stopped (# 2035, # 2040). If it is in the release mode, the lens control is shifted until an interrupt occurs, and if it is not both modes, the microcomputer stops without doing anything (# 2030 to # 2050).

Referring to FIG. 27, the lens control subroutine shown in step # 2050 of FIG. 26 will be described. Referring to FIG. 27, the lens correction amount is first calculated (# 2090). This will be described in detail below. In the interchangeable lens, the ratio LH = ΔLH / ΔYL between the amount of movement of the image stabilization lens (direction perpendicular to the optical axis) ΔLH and the amount of movement of the image (direction perpendicular to the optical axis) ΔYL is stored in the ROM. Here, the ratio LH is stored as information depending on the focal length in a variable focal length lens such as a zoom lens.
Further, in some interchangeable lenses, it is stored as information depending on focusing. Therefore, in the interchangeable lens, the ratio LH is read from the focal length information and the distance information (extending amount of the focus adjusting lens) DV and converted into the moving amounts ΔLX and ΔLY of the correction lens.

ΔLX = LH (fi, DV) × ΔX ΔLY = LH (fi, DV) × ΔY The ratio LH is classified into the following four types depending on the type of the interchangeable lens.

(1) A lens having only one ratio LH peculiar to an interchangeable lens (2) A ratio LH variable according to focusing (distance)
With a lens. In this case, when the camera side obtains the lens extension amount, data is input from the camera side.

(3) Variable ratio LH according to zooming
With a lens. (4) Variable ratio LH for both focusing and zooming
With a lens.

Then, using these correction amounts ΔLX and ΔLY, the next blur amount is predicted. As the method, (i) linear prediction control ΔLX 1 = LH (f, DV) × ΔX −2 ΔLX 2 = LH (f, ΔDV) × {ΔX −1 + (ΔX −1
ΔX −2 )} ΔLX 3 = LH (f, DV) × {ΔX 1 + (ΔX 1 −Δ
X −1 )} (ii) Ratio of blurring amount from previous time (ΔX i ) / (ΔX i1 )
Multiplied by a certain constant r and used as the blurring weighting coefficient of this time + linear prediction ΔLX 1 = LH (f, DV) × ΔX −2 (r · ΔX −2 / ΔX
-3 ) ΔLX 2 = LH (f, DV) × {ΔX -1 (r · ΔX -1 / Δ
X −2 ) + ΔX −1 −ΔX 2 }.

Since the same applies to the Y direction, a description thereof will be omitted.
Note that the simulation result when the linear prediction control described in (i) above is performed is shown in FIG.

Returning to FIG. 27, the values obtained in this way
Outputs the correction amounts ΔLX and ΔLY to the pulse motor control circuit
I do. The correction limit switch
Sx 1~ SyTwoIt is determined whether any of the above has turned off.
If it is turned on, the shake limit data is set and this switch
Repeat the OFF detection of. The same when not turned off
It is. This routine does not execute the CSLE interrupt again.
Continue until

Next, the reset control will be described. FIG. 29 is a diagram showing a driving mechanism of the correction lens. Referring to FIG. 29, the drive mechanism for the correction lens includes a correction lens 11 and a holding frame 12 that holds the correction lens 11. Holding frame 12
Is provided with a rod 14 that is pushed by the holding frame 12 and turns off the limit switch SX1 before the mechanism contact 13 and the holding frame 12 that indicate the movement limit of the correction lens come into contact with the mechanism contact 13. When the drive pulse motor rotates, the drive unit 31 rotates. A ball screw is provided between the drive unit 31 and the drive shaft 30. In addition, the drive shaft,
A V-groove is provided, and the drive shaft is driven in the straight traveling direction by the lead of the V-groove as shown in FIG. Driving is performed in the range of 1 in the figure. Since the same applies to the Y direction, description thereof will be omitted. In the present invention, since the mechanical mechanism is not directly related, detailed description thereof will be omitted.

FIG. 31 shows a reset control routine in the correction lens driving mechanism having the above configuration.
Referring to FIG. 31, first, a pulse normal rotation signal is output to the circuit of the pulse motor M1 in the X direction, and the pulse motor M1 is driven by one pulse. The correction lens is moved to the right in FIG. 29, and it is determined whether or not the switch SX1 is turned off (# 206).
0, # 2065). If switch SX1 is not turned off in step # 2065, the program proceeds to step # 2060 to drive one pulse. When switch SX1 is turned off in step # 2065, a signal for driving pulse motor M1 in the reverse direction by KN pulses is output. Then, the pulse motor M1 is rotated in the opposite direction to set the initial position in the X direction (# 2070).
Next, the initial setting in the Y direction is performed.

The pulse motor M2 is normally rotated by one pulse,
It is determined whether limit switch SY1 is turned off (# 2080). Switch SY in step # 2080
If 1 does not turn off, one pulse is further driven.
Here, if the switch SY1 is turned off, a signal for driving the pulse motor in the reverse direction by the KN pulse is output, the pulse motor M2 is driven, and the initial setting is completed (# 208).
5), the program returns. The above constant KN
Is a predetermined constant for the initial position set when the correction mechanism is configured.

[0090]

According to the present invention, based on a plurality of blur amount data obtained by repeatedly performing the blur detecting operation, the blur amount data which will occur thereafter is predicted, and the predicted blur amount data is obtained. Based on this, image blur is corrected. Since the amount of blurring after that is predicted in this way,
It is possible to prevent a tracking delay in the blur correction control. Therefore, appropriate blur correction can be performed, and a clear image without blur can be obtained.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view of a camera system to which the present invention is applied.

FIG. 2 is a circuit block diagram on the main body side of a camera to which the present invention is applied.

FIG. 3 is a flowchart showing the operation of the camera system to which the present invention is applied.

FIG. 4 is a flowchart showing the operation of the camera system to which the present invention is applied.

FIG. 5 is a diagram showing the performance of a camera shake sensor to which the present invention is applied.

FIG. 6 is a flow chart for explaining the operation of the present invention.

FIG. 7 is a flow chart for explaining the operation of the present invention.

FIG. 8 is a flow chart (A) for explaining the operation of the present invention and a diagram (B) showing a photometric pattern.

FIG. 9 is a flowchart for explaining the operation of the present invention.

FIG. 10 is a flow chart for explaining the operation of the present invention.

FIG. 11 is a flow chart for explaining the operation of the present invention.

FIG. 12 is a flow chart for explaining the operation of the present invention.

FIG. 13 is a program diagram of the AE.

FIG. 14 is a program diagram of the AE.

FIG. 15 is a flowchart illustrating the operation of the present invention.

FIG. 16 is a diagram (A) and (B) showing the contents displayed in the display section and the finder of the camera body, and a flowchart (C) explaining the operation of the camera system.

FIG. 17 is a flowchart for explaining the operation of the camera system according to the present invention.

FIG. 18 is a circuit block diagram of a shake detection device applicable to the present invention.

FIG. 19 is a perspective view showing an angular velocity sensor applicable to the present invention.

FIG. 20 is a block diagram showing a sensor unit and a monitor unit of an angular velocity sensor that can be applied to the present invention.

FIG. 21 is a circuit diagram of an angular velocity sensor applicable to the present invention.

FIG. 22 is a flowchart of a microcomputer that controls a circuit block of the shake detection device applied to the present invention.

FIG. 23 is a flowchart of a microcomputer that controls a circuit block of the blur detection device applied to the present invention.

FIG. 24 is a circuit diagram showing a strobe circuit.

FIG. 25 is a block diagram showing a circuit configuration on the lens side.

FIG. 26 is a flowchart illustrating an operation of a lens side microcomputer.

FIG. 27 is a flowchart illustrating an operation of a lens side microcomputer.

FIG. 28 is a diagram showing a simulation result of camera shake correction.

FIG. 29 is a diagram showing a drive mechanism of a correction lens that performs camera shake correction according to the present invention.

FIG. 30 is a diagram showing a driving mechanism of a correction lens that performs camera shake correction according to the present invention.

FIG. 31 is a flowchart showing the processing of a correction lens that performs camera shake correction according to the present invention.

[Explanation of symbols]

1 camera body 2 interchangeable lens SX X-direction camera shake sensor SY Y-direction camera shake sensor DISP 1 Display unit In the drawings, the same reference numerals indicate the same or corresponding parts.

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Naoshi Okada 2-3-13 Azuchi-cho, Chuo-ku, Osaka, Osaka International Building Minolta Co., Ltd. (72) Hiroshi Otsuka 2-chome, Azuchi-cho, Chuo-ku, Osaka No. 13 Osaka International Building Minolta Co., Ltd.

Claims (4)

[Claims]
1. An optical device that collects light from an object by an optical system and forms an image of the object, the detecting device detecting a degree of blurring of the optical device, and the detecting device detecting the object. Based on the blur amount data, a correction unit that corrects the blur of the object image, and based on a plurality of blur amount data obtained by repeatedly performing the blur detection operation, the blur amount data that will be generated later is calculated. A blur correction comprising: a predicting unit that predicts; and a control unit that controls the correcting unit to correct the blur of the object image based on the predicted blur amount data obtained by the predicting unit. Optical device with function.
2. The correcting means is an optical element which is disposed in the optical system and is displaceable for correcting the blur of an object image, and a drive which drives the optical element based on the calculated blur amount data. The optical device with a shake correction function according to claim 1, further comprising:
3. The optical device with a blur correction function according to claim 1, wherein the predicting unit predicts subsequent blur amount data by linear prediction from the plurality of blur amount data.
4. The camera according to claim 1, wherein the optical device is a camera that collects light from a subject by an imaging optical system to form a subject image and captures the image. An optical device with a shake correction function according to any one of 1.
JP24342996A 1996-09-13 1996-09-13 Optical device with shake correction function Expired - Lifetime JP2953398B2 (en)

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JP24342996A JP2953398B2 (en) 1996-09-13 1996-09-13 Optical device with shake correction function

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Application Number Priority Date Filing Date Title
JP24342996A JP2953398B2 (en) 1996-09-13 1996-09-13 Optical device with shake correction function

Publications (2)

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JPH09105972A true JPH09105972A (en) 1997-04-22
JP2953398B2 JP2953398B2 (en) 1999-09-27

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7218341B2 (en) 1997-09-09 2007-05-15 Minolta Co., Ltd. Apparatus capable of shake estimation
JP2009265181A (en) * 2008-04-22 2009-11-12 Canon Inc Image blur correcting device and imaging device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7218341B2 (en) 1997-09-09 2007-05-15 Minolta Co., Ltd. Apparatus capable of shake estimation
JP2009265181A (en) * 2008-04-22 2009-11-12 Canon Inc Image blur correcting device and imaging device

Also Published As

Publication number Publication date
JP2953398B2 (en) 1999-09-27

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