JPH0980559A - Image blurring correcting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a blurring correcting device of high precision, at a low cost, by automatically adjusting value applying in the case of calculating correcting lens position by a camera itself, based on output of correcting lens position detecting circuit. SOLUTION: This controlling part 1 is the controlling part for executing control of the camera whole body including the blurring correcting control, a shutter control or the like. On the timing such as that a battery is fed or a main switch MSW is turned on by a user, a light emitting quantity adjustment of light emitting parts of correcting lens position detecting mechanisms 5y and 5p in the yawing direction and the pitching direction, calculation of output errors Vd1 value and Vd2 value, and gamma shift adjustment is respectively carried out by the camera itself. Thus, the dynamic range of output of the correcting lens position detecting mechanisms 5Y and 5P is secured, and the adequate correcting lens position precision is secured, therefore the blurring correcting with the adequate precision is made possible, without carrying out adjustment by an adjusting device at the delivery time.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image blur correction device for preventing image blur in an image pickup device such as a camera or binoculars.

[0002]

2. Description of the Related Art Conventionally, this type of shake correction apparatus has been used to prevent image shake on an image pickup surface or a film surface.
It has a mechanism for detecting camera shake and correcting the shake on the image plane according to the detected shake amount. It is known that the camera shake detection mechanism uses a mechanism that detects an angular velocity due to camera shake in a camera and a mechanism that detects an image shake amount from an image in a video movie or the like. According to the detected shake amount, the correction mechanism orthogonally intersects a part of the photographing lens (hereinafter referred to as a correction lens) with the photographing optical axis, and two directions orthogonal to each other (one of them is yawing). Direction, the other direction is defined as a pitching direction), and a mechanism for correcting the shake on the image plane is known.

The following methods are known as the mechanism of the correction lens. According to Japanese Patent Laid-Open No. 2-66535, the correction lens is arranged such that four support rods are parallel to the optical axis, and one end of the correction lens is attached to a member of the camera body. FIG. 57 is a sectional view schematically showing the example. The correction lens 30 of this correction lens mechanism is held by a lens holding member 30a, and this holding member 30a is
The four support rods 31 are supported by the book support rods 31 and can elastically bend, and are supported by the members of the camera body in a cantilever manner (state (a)). Therefore, the correction lens 30
When the support rod 31 is bent, as shown in (b),
It can move in the direction orthogonal to the optical axis (left-right direction on the paper surface).

Further, Japanese Patent Laid-Open No. 4-301822 discloses another method, which is schematically shown in FIG. This method of camera shake is based on the lens holding member 30 of the correction lens 30.
The slide shaft attached to a is configured to linearly slide with respect to the member of the camera body. Therefore, the correction lens 30 moves in the direction of this slip axis.
The slide shaft is elastically held near the neutral position by two coil springs 32 arranged so as to sandwich the bearing of the camera body. Another set of the correction lens mechanism having such a configuration is configured in the direction orthogonal to the shift direction, and can be arbitrarily moved within a predetermined movable range on a plane orthogonal to the optical axis.

As a means for driving the correction lens 30, a moving coil type actuator having the following structure is known. The holding member 30a of the correction lens 30 shown in FIGS. 57 and 58 is provided with driving coils for the yawing direction and the pitching direction, respectively, while the supporting portion on the camera body (or photographing lens) side has this coil. Corresponding to the magnet is attached to form a kind of electromagnetic actuator. An electromagnetic force is generated by passing a current through the coils for the yawing direction and the pitching direction, and the correction lens 30 is movable in each direction.

Next, a method of detecting the position of the correction lens 30 will be described.
The following optical position detection methods are known. For example, as shown in FIG. 58, a slit member 33 is attached to the holding member 30a of the correction lens 30, while the light emitting diode 34 and the slit member 33 are provided on the camera body side.
One-dimensional SPD3 as a position detection element on the opposite side across
5 is attached. The light emitted from the light emitting diode 34 passes through the slit of the slit member 33,
It is incident on D35. The center of gravity of the incident light is calculated from the output from the PSD 35 by a processing circuit described later, and the center of gravity of the incident light changes depending on the position of the correction lens 30, that is, the position of the correction lens position 30 is detected. The position detection unit configured in this way is capable of controlling the yawing direction and
It is provided in the pitching direction and detects the correction lens position in the yawing direction and the pitching direction.

Generally, the position of the center of gravity of the light incident on the one-dimensional PSD can be calculated from the two output currents I1 and I2 of the one-dimensional PSD. Specifically, the calculated value of (I1-I2) / (I1 + I2) It is known to be uniquely determined by. Similarly, the position of the correction lens 30 is calculated from the output currents I1 and I2 from the two terminals of the PSD 35. A circuit for detecting the position of the correction lens 30 from the output from the PSD 35 generally has a circuit configuration as shown in FIG. Operational amplifier OP31, resistors R31, R32, and operational amplifier O
The output currents I1 and I2 from the position detection element PSD35 are converted from currents to voltages (corresponding to the voltage V1 and the voltage V2, respectively) by the portion including the P32 and the resistors R33 and R34. Next, from the I1 and I2 outputs that have been voltage-converted by the portion composed of the operational amplifier OP33, the resistors R35, R36, R37 and R38, and the operational amplifier OP34 and the resistors R39, R40, R41 and R42
A subtracter and an adder for outputting a voltage (corresponding to voltage V3 and voltage V4, respectively) proportional to (I1-I2) and (I1 + I2), respectively, are configured. The output thus obtained, which is proportional to (I1−I2) and (I1 + I2), is input to the divider DIV1 to obtain (I1−I2) /
Output voltage (corresponding to V5) proportional to (I1 + I2)
Is done. Thus obtained (I1-I2) / (I1
The output V5 proportional to + I2) indicates the position of the center of gravity of the light passing through the slit of the slit member 33 from the light emitting diode 34, that is, the position of the correction lens 2.

Further, the light emitting diode 34 is driven by a light emitting portion drive circuit 36 at a constant voltage or a constant current using a known technique. Next, for shake correction control, as an example of shake correction control using these elastically supported correction lenses 2, a method disclosed in Japanese Patent Laid-Open No. 4-301822 is known. In this method, the shake correction information is properly corrected from the shake information output from the shake detection circuit, and therefore the correction lens target position is calculated, and the actual shake correction lens obtained by the correction lens target position and the circuit as described above is calculated. Based on the position and position, the servo circuit using analog hardware controls the current of the coil forming the electromagnetic actuator to control the shake on the image plane.

Further, conventionally, as a concept of designing a camera having such a shake correction function, a camera to which a shake correction function is added is not a general low-priced compact camera, and a user also has a shake correction function other than that. Since a camera will be purchased with the expectation of enhanced functions, it is necessary to design the camera with a focus on distance measuring performance and photometric performance, for example. The distance measuring function uses, for example, a multi-point distance measuring type, the photometric function uses a multi-division type, and an algorithm for calculating the focusing amount from the multi-point distance measuring values obtained from it We must also improve the performance of the algorithm that calculates the quantity. As an example, a technique of detecting a camera attitude difference, for example, using a vertical / horizontal position sensor or the like to detect the camera attitude of whether the user holds the camera vertically or horizontally, and feeds back the algorithm described above. Is proposed.

[0010]

However, the following problems occur in such a conventional image blur correction device. First, there is a problem of the characteristics of the light emitting diode used in the light emitting unit for detecting the correction lens position. Consider a case where the light emitting diode is driven at room temperature and with a constant drive current.
In this case, it should be noted that there are individual variations in the amount of light emitted from the light emitting diode, and the amount may be expected to be + 100% to -50% depending on the variation. If there is such a variation in the amount of emitted light, the correction lens position detection unit as described above, that is, the output calculation circuit of the PSD 35 needs to set the circuit gain as large as possible in view of the position detection resolution of the correction lens 30. On the other hand, the design of the correction lens position detection unit needs to be configured so that the correction lens position detection unit operates normally such that the output is not saturated in all cases. However, the voltage range of the power supply for operating this circuit is only a limited value. For this reason, the range of circuit gain allowed in design is limited, and the correction lens 3
The circuit gain must be set fairly low even if the position detection resolution of 0 is sacrificed to some extent. In order to solve such a problem, even if the cost increases, it is necessary to adjust the variation in the light emission amount of the light emitting diode for each camera.

In addition, attention must be paid to the temperature dependence of the light emission amount of the light emitting diode. In the above example, it is understood that the problem can be solved by adjusting the light emission amount one by one at room temperature. However, one is that the forward voltage of the light emitting diode changes depending on the ambient temperature. In order to prevent this, there is an example in which a constant current drive circuit that always drives the light emitting diode with a constant current is used as the drive circuit of the light emitting diode even if the cost increases. In addition, even if a constant drive current is always supplied to the light emitting diode by using a drive circuit that keeps the drive current of the light emitting diode constant, the light emission amount greatly changes as the ambient temperature changes. For example, in the temperature range where the camera is normally used
There is an example in which the luminescence amount of% changes.

In order to solve these problems, Japanese Unexamined Patent Publication No.
In 301822, etc., the added value I of the two output currents of PSD
There is a method of negative feedback controlling the drive current of the light emitting diode by 1 + I2. However, the circuit configuration becomes complicated,
There arises a problem of increasing costs. For this reason, conventionally, at room temperature, the light emission amount of each light emitting diode is adjusted in each camera, and the PSD processing circuit outputs in all cases in the operating temperature range of the camera. If the circuit gain does not saturate, the resolution of the correction lens must be sacrificed slightly to set the circuit gain low, or even if the cost increases slightly, the circuit configuration becomes complicated and these problems occur. Was solved.

Secondly, the output processing circuit of the PSD 35 has the following problems. First, there is a problem caused by the characteristics of the elements forming the circuit, especially the operational amplifier. Generally, an operational amplifier is different from an ideal operational amplifier in terms of input offset voltage, input offset current, and input bias current. In addition, each of these characteristics has temperature dependence,
The position detection accuracy of the correction lens is affected. The input offset current of a general bipolar operational amplifier is t at room temperature.
yp. Then, it is about several nA to several tens nA, and the maximum is about several 100 nA. In addition, this value may change by several tens of percent within a range in which the camera is used with respect to room temperature. On the other hand, the current output from the PSD 35 is often several 100 nA to several μA at most, and
It is not so large that the characteristics of these operational amplifiers can be ignored.
In addition, the influence of the dark current of the PSD 35 also affects the detection accuracy. It is known that the dark current of PSD increases exponentially with increasing temperature. Other divider DIV1
Also, the characteristics of each resistor cannot be ignored. Due to these effects, the position detection accuracy of the correction lens 30 is affected. In order to exclude these error factors, the correction lens position detection must be adjusted for each camera even if the cost increases. In addition, the values of the input offset voltage, the input offset current, the input bias current, the dark current of the PSD 35, etc. have temperature dependence. Cannot be suppressed. Also,
It is possible to reduce the position detection error by using a low input bias current, low offset offset current, low offset voltage type for the operational amplifier and a low dark current type for the PSD 35, but the cost increases. In addition, the divider is generally more expensive than the operational amplifier and the like, and the cost is increased.

An object of the present invention is to eliminate these problems as much as possible and to provide a more accurate shake correction apparatus to the market at a low cost.

[0015]

An image shake correction apparatus according to the present invention comprises a shake correction optical system which moves in a predetermined movable range so as to correct an image shake caused by a shake of an image pickup apparatus, and the shake correction optical system. A shake correction optical system displacement detection means for optically detecting a displacement, and the shake correction optical system by an output of the shake correction optical system displacement detection means at one end and the other end of the predetermined movable range at a predetermined timing. Position detection automatic adjusting means for calculating an adjustment value for calculating the position of
At least shake correction optical system position calculation means for calculating position information of the shake correction optical system from the output of the shake correction optical system displacement detection means and the adjustment value by the position detection automatic adjustment means is provided.

Further, the predetermined timing is a timing associated with a user's operation, and more specifically, a timing corresponding to an operation of inserting a battery into the image blur correction device or a state change of a main switch. Timing, timing corresponding to half-pressing of the release button, timing corresponding to full-pressing of the release button, or
The light emission amount is automatically adjusted at the timing immediately before exposure.

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION First, the structure of a camera according to this embodiment will be described with reference to the drawings. FIG. 1 shows the overall block configuration of an embodiment of the present invention. The lens 2 is a lens or a lens group that constitutes a part of a photographic optical system that is usually composed of a plurality of lenses.
00 is arranged in the lens barrel 200 of the interchangeable taking lens. The blur correction mechanism corrects the shake on the image plane by shifting the lens 2 on a plane substantially orthogonal to the optical axis O. Hereinafter, the lens 2 is referred to as a correction lens (the photographing optical system is not shown except for the correction lens 2). The correction lens 2 is moved in a predetermined direction (hereinafter referred to as a yawing direction) substantially orthogonal to the photographing optical axis O by a correction lens mechanism described below.
And a predetermined direction (hereinafter referred to as the pitching direction) that is substantially orthogonal to the photographing optical axis and orthogonal to the yawing direction.
Shift in two directions.

FIG. 2 shows drive mechanisms 7Y and 7P for driving the correction lens 2 so as to shift it in the yawing direction, and
It is the figure which showed typically the structure of the position detection mechanisms 5Y and 5P of the correction lens 2. The correction lens 2 is a lens holding member 2
The holding member 2a is held by the springs 15Y and 16Y.
Thus, the lens barrel member 200 is elastically supported at a substantially predetermined position, that is, movably supported by the lens barrel member 200. The holding member 2a is formed in a tubular shape, and the coil 11 is provided outside the holding member 2a.
Y is attached. On the other hand, in the lens barrel member 200,
A magnet 12Y polarized and polarized in two poles and yokes 13Y and 14Y made of a material having a high magnetic permeability such as iron are attached, and as shown in FIG. 2, they are arranged so as to surround the coil 11Y. , Constitutes a kind of electromagnetic actuator. These mechanisms generate an electromagnetic force when a current is applied to the coil 11Y, and the member of the correction lens 2 moves in the yawing direction substantially orthogonal to the optical axis O.

The movable range of movement of the correction lens 2 is preset to a predetermined range due to mechanical restrictions, and the movable range does not move beyond this range. A slit member 17Y is attached to the holding member 2a at a position facing the coil 11Y with the correction lens 2 interposed therebetween, and the slit member 17 moves together with the holding member 2a. Against the lens barrel member 200
On the side, a light emitting diode LED1 and a one-dimensional PSD (position sensitive light detec) as a position detecting element are provided.
tor) 1 is attached. Control unit (MPU) 1
Detects the position of the center of gravity of the light from the LED 1 that has passed through the inner slit member 17Y by the output from the PSD 1, and detects the position of the correction lens 2.

The correction lens drive mechanism in the pitching direction and the position detection mechanism of the correction lens 2 are also constructed in the same structure as the mechanism in the yawing direction. Further, the holding mechanism and the driving mechanism for these correction lenses 2 are shown in FIG.
7, the conventional mechanism shown in FIG. 58 may be used.
Next, the control unit 1 is a control unit that controls the entire camera including shake correction control and shutter control, and for example, a one-chip microcomputer or the like is used.
Hereinafter, the control unit 1 is referred to as MPU1. Correction lens drive mechanism 7
Y and 7P are mechanisms that respectively control the currents that drive the yawing direction coil 11Y and the pitching direction coil 11P (not shown), and drive the correction lens 2 in the yawing direction and the pitching direction. is there. M
The PU 1 drives the correction lens 2 to an arbitrary position within a predetermined movable range by controlling the correction lens drive mechanisms 7Y and 7P in the yawing direction and the pitching direction. Shutter 3
Controls the exposure of the light flux from the subject that has passed through the photographing optical system onto the film surface. The shutter 3 is normally closed, and the shutter drive circuit 6 releases the required amount and time through the shutter drive circuit 6 under the control of the MPU 1 at the required timing such as when the user operates the release button to perform the release operation. After a predetermined time, the film surface is closed to perform the exposure operation on the film surface.

The position detection mechanisms 5Y and 5P are mechanisms for detecting the position of the correction lens 2 in the yawing direction and the pitching direction, respectively. The MPU 1 monitors the output signal from this mechanism and recognizes the position of the correction lens 2. To do. The shake detection mechanisms 4Y and 4P are mechanisms that detect shakes generated in the camera in the yawing direction and the pitching direction, respectively, and output them to the MPU 1.

The MPU 1 is an MS arranged as a switch operated by the user, which is arranged in the camera body 100.
W, SW1 and SW2 are connected. The MSW is a main switch, and in the ON state, allows the MPU 1 to perform the main operation of the camera. On the contrary, in the off state, the main operation of the camera is prohibited. SW1 is a half-press switch that is turned on by a half-press operation of the release button of the user's camera,
When the half-push switch SW1 is turned on while the main switch MSW is turned on, the MPU 1 performs main operations for shooting preparation, such as distance measuring operation and photometric operation. SW2
Is a release (full-push) switch that is turned on by fully pressing the release button of the user's camera. When the main switch MSW is on and this release switch SW2 is turned on, the MPU 1 causes a shooting operation, for example, The shutter drive mechanism 6 is operated to open and close the shutter for the required amount for the required time.

The distance measuring mechanism 21 is a multi-point distance measuring type,
This is a mechanism that divides the shooting angle of view into a plurality of areas for distance measurement and outputs the detection result to the MPU 1. The photometric mechanism 22 is of a multi-division type and divides the subject brightness within the shooting angle of view into a plurality of regions for photometry, and outputs the detection result to the MPU 1. The strobe mechanism 23 is a flash discharge device, is charged by a known technique at a known timing, and emits light with a light emission signal from the MPU 1. The EEPROM 24 is a non-volatile memory in which an adjustment value related to shake correction or an adjustment value related to other cameras is written.

In addition, the power supply for operating the above-mentioned mechanism, the MPU 1 and the like, switches, and other electric mechanism are incorporated in this camera system.
Those not related to the present invention will be omitted. Also, MPU1
Has an A / D conversion function for converting the analog output of the shake correction detection mechanisms 4Y, 4P and the correction lens position detection mechanisms 5Y, 5P into a digital value. On the contrary, the MPU1 also has a D / A conversion function for converting a digital value used inside the MPU1 into an analog signal.
For example, the correction lens drive mechanisms 7Y and 7P can be controlled in an analog manner.

Hereinafter, a specific form of each mechanism of the embodiment of the present invention will be described focusing on the operation. As described above, the shake correction mechanism is for the yawing direction, and
Although two sets are required for each pitching direction, they are performed with substantially the same mechanism configuration and equivalent operation, and the following description of the mechanism and operation is basically for the yawing direction.

Next, the operation of the position detecting mechanism for detecting the position of the correction lens 2 will be described. Generally, one-dimensional PSD (position sensitive light detecto) is used as a position detecting element.
r) is known. Also in this embodiment, the correction lens 2
One-dimensional PSD is used to detect the position of, and a specific example thereof will be described. The slit member 17Y in the yawing direction is
The light projected from the light emitting diode LED1 passes through the slit 17Y and is incident on the one-dimensional PSD 1 along with the position change of the correction lens 2 in the yawing direction. MPU
1, the position of the center of gravity of the slit light in the yawing direction of the correction lens 2 is calculated from the ratio of the two output currents I1 and I2 from the PSD1. The calculation formula will be described below.

Now, assuming that the total length of the PSD 1 is L, the center position of the PSD 1 is coordinate zero, and the barycentric position of the slit light or the correction lens position LRY is x, ideally the relational expression of Formula 1 is established.

[0028]

## EQU1 ## 2X / L = (I1-I2) / (I1 + I2) In order to simplify the explanation, specific values will be applied to the respective dimensions. However, it goes without saying that the present invention is not limited to these values as long as the conditions described are satisfied.

As shown in FIG. 3, the effective total length L of the PSD is 4.0 [mm], the movable range of the correction lens 2 in the yawing direction and the pitching direction is ± 1.0 [mm], and the position of the correction lens 2 is set. In the center of this movable range, the light from the above-described slit is incident on the PDS 1 in the vicinity of the center thereof. FIG.
(a) and (b) show the position of the correction lens 2 in the yawing direction and the outputs I1 and I2 of the PSD 1 and the equation 1 under the above conditions.
Shows the relationship. Further, the correction lens position in the pitching direction is also detected by the same member configuration.

FIG. 5 shows an embodiment of the correction lens driving mechanism 7Y in the yawing direction. The coil 11Y in the yawing direction is driven by the power operational amplifier OP4,
An almost linear voltage is applied to the output voltage VoutY from PU1. FIG. 6A shows VoutY and the coil 1.
The relationship of the applied voltage of 1Y is shown. The electrical resistance value of the coil 11Y can be considered to be substantially constant because the change in resistance value due to temperature rise can be ignored if the energization time is short. Therefore, the coil 11Y is driven by a current proportional to the output voltage VoutY from the MPU 1, and the output voltage Vou from the MPU 1 is driven by the coil 11Y and the magnet 12Y paired with the coil 11Y.
A driving force almost proportional to tY is obtained. FIG. 7 also shows an example of the relationship between the voltage applied to the coil 11Y and the position of the correction lens 2 in the steady state. As described above, since the holding member 2a of the correction lens 2 is elastically supported, a position outward from the center position (this position is 0 for convenience) of the movable range of the correction lens 2 in the yawing direction. The elastic force (spring force) of the spring 15Y or 16Y increases in proportion to the change, and at the position where the elastic force and the magnetic driving force due to the driving current flowing in the coil 11Y are balanced, the holding member 2a or the correction lens 2 The positional balance of is maintained. FIG. 7 shows this with a solid line. In FIG. 7, the correction lens 2 is assumed to move 1 [mm] per applied voltage 1 [V] of the coil 11Y. Further, the movable range of the correction lens 2 is the position −
The range is from 1.0 [mm] to +1.0 [mm], and the correction lens 2 is not driven to a position beyond this range. However, since the weight of the member of the correction lens 2 (gravitational force) is affected, the steady-state position of the correction lens 2 is biased in either the + or − direction depending on how the weight of the correction lens 2 is received. Even when the elastic force of the member of the correction lens 2 is biased in the + direction or the-direction, the steady-state position of the correction lens 2 is similarly biased.

FIG. 7 shows the weight of the member of the correction lens 2,
Alternatively, the case where the position of the -0.2 [mm] correction lens 2 is shifted due to the bias of the elastic force is shown by a dotted line. Incidentally, M
PU1 has a built-in D / A converter that generates an arbitrary voltage suitable for the VoutY output. However, MPU
Many of the D / A converters incorporated in a normal one-chip computer such as that used in No. 1 are of a type that can generate only a positive voltage. In such a case, the correction lens drive mechanism 7Y is shown in FIG. It is configured to have input / output characteristics as shown in b). Alternatively, it is also possible to use a linear motor drive IC or the like that obtains a linear drive voltage with respect to an input voltage used in a tracking control actuator of a compact disk or the like in recent years.
However, in order to simplify the description, the description will be continued below with the type of FIG.

Next, an embodiment of the correction lens position detecting mechanism 5Y in the yawing direction will be described. The correction lens position detection mechanism 5Y is divided into a light emitting unit mechanism and a light receiving unit circuit.
FIG. 8 shows the first embodiment of the light emitting unit circuit in the yawing direction.
It is shown in (a). The input VIFY of this circuit is an operational amplifier OP.
3 is connected to the input, and the current is amplified by Tr1 to drive the light emitting diode LED1. In addition, for example, an infrared light emitting type light emitting diode is used for the LED 1 used here. Alternatively, a laser diode may be used because of its superior coherence.
Now, assuming that the resistance value of the resistor R5 is RIF, the drive current IFY flowing through the LED 1 and the input voltage VIFY of the present circuit have a relationship of approximately equation 2.

[0033]

## EQU2 ## IFY = VIFY / RIF The MPU 1 has a built-in D / A converter or the like that generates an arbitrary voltage suitable for the VIFY output. FIG. 8B shows a second embodiment of the light emitting unit circuit in the yawing direction.
FIG. 8B shows digital inputs VIF0Y and VI having 4-bit predetermined High level and predetermined Low level.
An example of a circuit that changes the drive current IFY of the LED 1 by F1Y, VIF2Y, and VIF3Y will be shown. Input VIF0Y, V
IF1Y, VIF2Y, and VIF3Y are connected to MPU1, and the combination of High and Low levels is 0 to 1.
16 settings of 5 can be set. Now R6, R7, R8,
By setting R9 appropriately, VIF0Y, VIF1
Set value σFY of the combination of Y, VIF2Y, and VIF3Y
In contrast, the drive current IFY can be controlled almost linearly. FIG. 9 shows the relationship between σFY and IFY.

Next, FIG. 10 shows a circuit of a detecting portion of the correction lens position detecting mechanism 5Y in the yawing direction. A one-dimensional PSD is used as an element for detecting the correction lens position. L
The light beam projected from the ED1 and having passed through the slit of the slit member 17Y is incident on a certain position of PSD1. PSD
The position of the light beam incident on the beam No. 1 changes depending on the position of the correction lens 2 in the yawing direction, and the output currents I1 and I2 from the PSD 1 depend on the position of the correction lens 2 in the yawing direction. The ratio of changes. A reverse bias voltage VB is applied to the PSD1 by a known method, and its high speed response is secured. PSD1 output currents I1 and I2 are
The operational amplifier OP1 and the operational amplifier OP2 and resistors R1, R2, R3, and R4 are input to the current-voltage converter, and the voltage-converted outputs of V1 and V2 are MP.
Output to U1. The resistances of the resistors R2 and R4 are determined so as to cancel the influence of the input bias currents of the operational amplifiers OP1 and OP2 on the outputs V1 and V2, respectively. The MPU 1 has a built-in A / D converter and can monitor the voltages V1 and V2.

However, the A / D converter incorporated in a normal one-chip computer such as that used for the MPU 1 is
Many types are capable of converting only a positive voltage input. In that case, an appropriate A / D converter may be provided outside the MPU 1, or the output V can be output by using a known technique.
1, V2 may be appropriately inverted and amplified to obtain a positive voltage output, or the resistor R in FIG.
2. Connect the GND side at one end of R4 to an appropriate reference voltage,
The circuit may be configured to obtain the outputs V1 and V2 that are voltage-shifted by the reference voltage.

Now, the circuit of the detector shown in FIG. 10 will be analyzed in detail. FIG. 11 shows the details of the voltage value and the current value of the I1 current-voltage conversion circuit unit of FIG. Now, the output current of PSD1 is I1, the dark current is ish, the input bias current of the − input of the operational amplifier OP1 is ib, the input bias current of the + input is ib ′, the input offset voltage is Vos, and the resistor R.
The resistance values of 1 and R2 are Rf and Rb, respectively,
When the voltage direction is as shown in FIG. 11, each voltage is
The relationships of Expression 3, Expression 4, and Expression 5 are established.

[0037]

## EQU3 ## V + = ib '* Rb

[0038]

V− = Vos + V + = Vos + ib ′ × Rb

[0039]

V1 = − (I1 + ish + ib) × Rf + V − = − I1 × Rf + {Vos + (ib ′ × Rb−ib × Rf) −ish × R f} As shown in Equation 5, V1 is ideal. Operational amplifier,
And the output voltage when using an ideal PSD -I1
For xRf, an error due to the influence of the input offset voltage Vos, the input bias currents ib and ib ', and the dark current ish is output. Here, Rb = Rf is set, and ios = i
If b′-ib, the equation 5 is written as the equation 6.

[0040]

## EQU6 ## V1 = -I1 * Rf + {Vos + ios * Rf-ish * Rf} = (-I1 + ios-ish) * Rf + Vos Note that ios corresponds to the input offset current of the operational amplifier OP1. As you can see from Equations 5 and 6, V1 and
V2, which is output similarly to V1, is the input offset voltage Vos, the input bias currents ib and ib ', and the dark current ish.
When the influence of the above is negligibly small, the voltage is output in proportion to I1 and I2.

Next, an embodiment of the shake detection mechanism 4Y in the yawing direction will be described with reference to FIG. The angular velocity sensor 1 detects the angular velocity due to camera shake generated in the camera,
It is a sensor that outputs according to the detected angular velocity. The sensor 1 uses, for example, a piezoelectric vibration type gyro that detects Coriolis force. Resistors R20, R21, R22, capacitors C1, C2, C3, and operational amplifier OP10.
The circuit constituted by is a low-pass filter circuit for removing a high frequency component that does not depend on camera shake, particularly a high frequency noise component of the angular velocity sensor, from the output of the angular velocity sensor 1. The circuit composed of capacitor C4 and resistor R23 is
A high-pass filter circuit for removing low-frequency components that do not depend on camera shake from the output from the low-pass filter circuit is configured. Operational amplifier OP11, resistors R23, R2
The circuit configured by 5 non-inverts and amplifies the output from the above-described high-pass filter circuit to a voltage level that can be easily handled by the MPU 1 and outputs it to the MPU 1. This output is VωY.
The output VωY of the shake detection mechanism in the yawing direction thus obtained can be obtained almost in proportion to the angular velocity in the yawing direction generated in the camera. The shake detecting mechanism 4P in the pitching direction also detects the angular velocity in the pitching direction generated in the camera with the same circuit configuration.

Next, adjustment of the light emission amount of the light emitting portion of the correction lens position detection mechanism 5Y in the yawing direction will be described. this is,
It is not necessary to adjust the variation of the light emission amount of each light emitting diode used for the light emitting portion of the correction lens position detection and the change of the light emission amount due to the temperature change, by using an external adjusting device of the camera or the like. It is provided for automatic adjustment by the camera itself at the operation timing, to obtain a larger dynamic range of the output of the correction lens position detection mechanism, and to obtain a sufficient position detection resolution of the correction lens 2. Hereinafter, an embodiment of adjusting the light emission amount of the light emitting unit will be described.

The output voltages V1 and V2 of the detector of the correction lens position detection mechanism 5Y in the yawing direction of the light emission amount of the light emitting diode LED1 are within a predetermined voltage range at all positions in the movable range of the correction lens 2 in the yawing direction. And the amount of light emission is maximized. In particular,
The correction lens 2 is driven to each end of the movable range in the yawing direction, and the light emitting diode LED1 in the yawing direction at that time is driven.
The output V1 and V2 of the detector of the correction lens position mechanism 5Y in the yawing direction is monitored while changing the drive current of
1 and V2 are predetermined voltages (-4.75 in the present embodiment).
[V]) Find the maximum drive current of the light emitting diode LED1 in the yawing direction that does not become lower than the voltage. Output V1 of the correction lens position detection mechanism 5Y in the yawing direction,
As shown in FIG. 4A, V2 monotonically increases or monotonously decreases with respect to the change in the position of the correction lens 2. Therefore, as described above, if this adjustment is performed only at each end of the movable range of the correction lens, the correction lens 2 does not have a voltage lower than the predetermined voltage regardless of the position of the movable range. The light emission amount of the light emitting diode becomes the maximum value.

Similarly, the correction lens 2 is driven to each end of the movable range in the pitching direction, and the output V1 of the detection unit of the correction lens position mechanism 5Y in the pitching direction is changed while changing the driving current of the light emitting diode in the pitching direction at that time. , V2 is monitored, and the maximum drive current of the light emitting diode of the pitching method in which neither V1 nor V2 is lower than -4.75 [V] is found.

Specific examples thereof are shown in FIGS. 13, 14 and 15.
The adjustment of the light emission amount of the light emitting diode LED1 in the yawing direction will be described with reference to. The same control is performed in the pitching direction to adjust the light emission amount of the light emitting diode. FIG.
4 and 15 are the software built in MPU1,
The flowchart which showed the control flow of the part regarding the light emission amount adjustment of LED1 of the yawing direction is shown. The process starts from step S900, and in step S901, the counter m is initialized to 0. Next, step S
At 902, the LED1 is driven with the predetermined drive current initial value I0 (corresponding to the time t1 of the operation timing of FIG. 13). The current value I0 of S902 is set to a current value in which the outputs V1 and V2 are never saturated even if the LED1 is driven by this current value by design, taking into consideration the operating temperature range of the camera. Next, in step S903, the correction lens 2 is gradually driven to the + movable end in the yawing direction. The input VoutY of the correction lens driving mechanism 7Y shown in FIG.
In the timing chart of FIG.
During t4, gradually increase from 0.0 [V] to +4.0 [V]. As a result, the voltage applied to the coil 11Y gradually changes from 0.0 [V] to +4.0 [V],
The correction lens 2 is gradually driven in the + direction of the yawing direction and strikes the + side drive end (correction lens position +1.0 [mm] position) at timing t3. When the correction lens 2 is driven to the movable end in the + direction, the detection unit outputs V1 and V2 of the correction lens position detection mechanism 5Y in the yawing direction are monitored in S905 (corresponding to timing t5 in FIG. 13). . However, the correction lens 2 slightly bounces when it hits the movable end, that is, V1, V2
The voltage value of V1 may not be a constant value, and if there is such a concern, the timing t5 at which V1 and V2 are monitored
Ensure time for the bounce to subside (Fig. 1
4 corresponds to the processing of S904). Next, V1 monitored in step S906 is a predetermined voltage, here -4.75.
If lower than [V], step S912 (see FIG. 15)
If V2 monitored in step S907 is lower than the predetermined voltage here -4.75 [V], the process proceeds to step S912. If not, the value of m is incremented by 1 in step S908, In S909, m determines a predetermined value. If m = predetermined value in step S909, the process proceeds to step S912, and if not, the LED 1 is driven so that the drive current calculated by I0 + ΔIF × m is obtained in step S910.
Next, in step S911, the process waits until the outputs of the detection units V1 and V2 of the correction lens position detection mechanism 5Y in the yawing direction are stabilized, and the process returns to step S905. Step S9
By repeating the processing from 05 to S911 until V1 <-4.75 [V] or V2 <-4.75 [V] or until m = predetermined value, gradually The driving current IF of the LED 1 is increased to the +, and the yawing direction correction lens position detection mechanism 5Y at the + movable end at that time is detected.
The output V1 and V2 of the detection unit of is a predetermined voltage, in this case,
The maximum drive current IF of LED1, which does not fall below -4.75 [V], is obtained as I0 + [Delta] IF * (m-1). The driving current of the LED1 and the output of V1 and V2 will be described with reference to the timing timing chart of FIG. 13. The driving current of the LED1 is gradually increased by ΔIF from t5, and t
When the drive current is increased in 6, the voltage of V1 falls below the predetermined voltage of -4.75 [V].

Next, in step S912 shown in FIG. 15, the counter n is set to 0 which is an initial value. Next, in step S913, the LED is driven with the predetermined drive current initial value I0.
1 is driven (corresponding to the timing t7 in FIG. 13).
Next, in step S914, the correction lens 2 is gradually driven to the − movable end in the yawing direction. The input VoutY of the correction lens drive mechanism 7Y shown in FIG. 5 is +4.0 to -4.0 between the timings t8 and t10 in FIG.
Gradually lower to [V]. As a result, the voltage applied to the coil 11Y gradually changes from +4.0 [V] to -4.0 [V], and the correction lens 2 is gradually driven in the-direction of the yawing direction, and at timing t9. At-
Side drive end (correction lens position-position of 1.0 [mm])
Hit against. When the correction lens 2 is driven to the − direction movable end, in step S916, the detection unit outputs V1 and V2 of the yaw direction correction lens position detection mechanism 5Y are monitored (corresponding to timing t11 in FIG. 13). However, the correction lens 2 may bounce to some extent at the timing of hitting the movable end, that is, the voltage values of V1 and V2 may not be constant values. The time until the bounce is stopped is secured (corresponding to the processing of S915 in FIG. 15). Next, if V1 monitored in step S917 is lower than a predetermined voltage, here -4.75 [V], the process proceeds to step S923, and if NO, V1 monitored in step S918.
If 2 is lower than the predetermined voltage, here -4.75 [V], the process proceeds to step S923, and if not, step S9.
In step 19, the value of n is incremented by 1, and in step S920 n is determined to be a predetermined value. If n = predetermined value in step S920, the process proceeds to step S923, and if not, I0 + Δ in step S921.
The LED 1 is driven so that the drive current is calculated by IF × n. Next, in step S922, the process waits until the outputs of the detection unit outputs V1 and V2 of the correction lens position detection mechanism 5Y in the yawing direction are stabilized, and the process returns to step S916.
The processing of steps S916 to S922 is V1 <-4.75.
The drive current IF of the LED 1 is gradually increased by repeating until the voltage becomes [V], or V2 <−4.75 [V], or n = the predetermined value.
At that time, the outputs V1 and V2 of the detection portion of the yaw direction correction lens position detection mechanism 5Y at the − movable end are predetermined voltages, in this case, the maximum drive current of LED1 that does not fall below −4.75 [V]. IF is obtained as I0 + ΔIF × (n-1). The driving current of LED1 and the output of V1 and V2 will be described with reference to the timing timing chart of FIG.
The voltage of 2 is below the predetermined voltage of -4.75 [V].

Next, in step S923, it is determined that m> n. If m> n, that is, n is smaller than m, step S923 is performed.
At 924, the optimum drive current of LED1 is I0 + ΔIF × (n-
1), and conversely, if m> n, that is, n is larger than m
If is not small, the optimum drive current of LED1 is set to I0 + ΔIF × (m−1) in step S925, the process proceeds to step S926, and the light emitting diode LED1 is deenergized (corresponding to timing t13 in FIG. 13), and step S92.
At 7, the correction lens 2 is gradually driven to the vicinity of the base position in the yawing direction. Timing t13 to t in FIG. 13 is input to the input VoutY of the correction lens driving mechanism 7Y shown in FIG.
Between 14, gradually increase from -4.0 [V] to 0.0 [V]. As a result, the applied voltage of the coil 11Y in the yawing direction gradually changes from -4.0 [V] to 0.0 [V], and the correction lens 2 is gradually driven near the original position in the yawing direction. It Next, step S928.
This completes the control of the light emission amount adjustment in the yawing direction.

The circuit of the light emitting portion used for adjusting the light emission amount of the light emitting diode LED1 described above may be of the type shown in FIG. 8A or the type shown in FIG. 8B. Light emitting diode LED
The change amount ΔIF of the drive current of 1 and the initial drive current I0 may be set appropriately. For example, if the circuit of the light emitting section is of the type shown in FIG. Alternatively, the initial drive current I0 may be 0.

Next, the adjustment of the detection portion of the correction lens position detection mechanism 5Y will be described. First, the significance of adjustment of the detection unit of the position detection mechanism 5Y will be described. Operational amplifier OP
The effects of the input bias currents 1 and OP2 can theoretically be canceled by setting the resistance value of the resistor Rb to an appropriate value, as is apparent from the expressions 5 and 6. The remaining effects have an effect on the outputs V1 and V2 due to the input offset current values and input offset voltage values of the operational amplifiers OP1 and OP2, and the dark current value of the PSD1. If these values are always constant under all conditions in which the camera is used, it is possible to adjust each camera at the time of camera shipment from the circuit or by software such as a one-chip computer. Let's do it. However, the input offset current value, the input offset voltage value, and the dark current value each have temperature dependence, and even if the above adjustment is performed, these errors may increase depending on the temperature conditions used by the camera. Occurs. One way to reduce the output error due to such factors is to increase the light emission amount of the light emitting diode. However, as a practical matter, the maximum rating of a light emitting diode is limited. A second method is to use an operational amplifier with a low input offset voltage and a low input bias current, but such an operational amplifier is generally expensive and leads to an increase in cost.

These will be described by raising specific numerical values. Now, as a first example, the above-mentioned light emitting diode LED1
As a result of the adjustment of the amount of emitted light, the output currents I1 and I2 of the PSD1 are as shown in FIG. 16 (however, the dark current of the PSD1 is not included in these I1 and I2 for convenience of explanation). The output voltages V1 and V2 of the detection unit which change with the position in the yawing direction are output, and the dark current of PSD1, the input offset voltage of the operational amplifiers OP1 and OP2, and the input voltage Due to the influence of offset current and the like, it is assumed that the output is made with an error of −0.25 [V] from the ideal output (shown by the thin solid line in FIG. 17). The error of −0.25 [V] is a practical value, and for example, an error of this voltage occurs even if the input offset current of the operational amplifiers OP1 and OP2 is about 20 nA. Here, V1 and V2 are ideally I1 and I2.
Since the output voltage should be proportional to, the correction lens position LRY in the yawing direction can be obtained by the equation 7 from the relationship of the equation 1. However, the correction lens position LRY in the yawing direction calculated by the equation 7 is -7.degree. With respect to the ideal straight line indicated by the thin solid line V5 in FIG.
An error of about 7% occurs. Incidentally, V3 =-(V1-V2) and V4 =-(V1 + V2), which are the intermediate results of the equation 7.
Is shown by the thick solid line in FIG.

[0051]

[Formula 7] LRY = γ × {(V1−V2) / (V1 + V2) where γ is the total length L of the SDP 1 = 4.0 [mm] and the movable range of the correction lens 2 in the yawing direction is 2.0 [mm]. Therefore, γ = 2.0 [mm]. Next, as a second example, as a result of the above-described adjustment of the light emission amount of the LED1, the output currents I1 and I2 of the PSD1 are as shown in FIG.
21 is not included in I1 and I2 for convenience of description), and is output while changing with the position of the correction lens 2 in the yawing direction, and the output voltages V1 and V2 of the detector are shown by the thick solid lines in FIG. Due to the influence of the dark current of PSD1, the input offset voltage of the operational amplifier, the input offset current, etc. as shown by V1 and V2, only V1 is -0.25 [from the ideal output (shown by the thin solid line in FIG. 21). V] It is assumed that the output is made with an error. Since V1 and V2 should ideally be output voltages proportional to I1 and I2, the correction lens position LRY in the yawing direction can be obtained by the equation 7. However, the correction lens position LRY in the yawing direction calculated by the expression 7 has an error of about -8 [%] at maximum with respect to the ideal straight line shown by the thin solid line V5 in FIG. . It should be noted that V3 =-, which is an intermediate result of Equation 7.
(V1-V2) and V4 =-(V1 + V2) are shown by the thick solid lines in FIG.

Even if the effects of the dark current of the PSD 1, the input offset voltage of the operational amplifier, the input offset current, etc. are adjusted for each camera at the time of shipment, since these error factors have temperature dependence, they are basically It does not become a solution. Further, the mechanical positional relationship between the slit member and the PSD 1 and the like varies from camera to camera. Therefore, the correction calculated from the outputs V1 and V2 of the detection unit of the yawing direction correction lens position detection mechanism 5Y is performed. Lens position LRY
If the camera is not adjusted one by one, an error will occur in the calculated position. Specifically, the position of 0 calculated by the formula 7 does not always match the center of the movable range of the correction lens 2 in the yawing direction, or γ in the formula 7
However, there are variations with each camera.

Therefore, in order to solve the above-mentioned problem, in the present embodiment, the adjustment by the external adjusting device of the camera is not particularly necessary, and the camera itself corrects from the output of the correction lens position detecting mechanism at a predetermined camera operation timing described later. The adjustment value for obtaining the lens position is automatically calculated, and the position of the correction lens 2 is detected with high accuracy. In the shake correction control, the yawing direction correction lens LRY [mm] calculated by using Equations 8, 9, and 10 is used.

[0054]

LRY = γ * {(V1'-V2 ') / (V1' + V2 ')-s) where

[0055]

## EQU9 ## V1 '= V1-Vd1

[0056]

[Formula 10] V2 ′ = V2-Vd2 Formula 8 makes γ in Formula 7 a variable value and adds a term of s for adjusting the central position of the movable range of the correction lens 2,
And Vd1, which is determined by the adjustment described below for V1 and V2,
It is the number corrected by Vd2. Vd1 and Vd2 are the output V1 of the detector when the LED1 is not lit, and
The adjustment value indicating the voltage of V2, γ, is shown in FIG. 24 (V1 '
-V2 ') / (V1' + V2 ') and a gamma adjustment value showing the inclination of a straight line showing the relationship between the yawing direction correction lens position LRY, and s is a shift adjustment value showing correction in the horizontal direction of the straight line also shown in FIG. And these adjustment values are calculated by the automatic adjustment method described later.

Next, an embodiment of a method for automatically calculating an adjustment value for obtaining the correction lens position from the output of the correction lens position detection mechanism by the camera itself will be described. The specific control example of the adjustment of the correction lens position detection unit in the yawing direction will be described with reference to the timing chart shown in FIG. 25 and the flowchart shown in FIG. The same control is performed in the pitching direction to adjust the correction lens position detector. FIG. 26 is a flowchart showing a control flow of adjustment of the correction lens position detection unit in the yawing direction in the software built in the MPU 1. The process starts at step S300 and proceeds to step S3
In 01, when the LED1 of the light emitting portion is in a non-light emitting state, the detection portion output V1 of the yawing direction correction lens position detection mechanism 5Y,
V2 is monitored and the values are set to Vd1 and Vd2, respectively (corresponding to operation timing t21 in FIG. 25). The voltages Vd1 and Vd2 can be regarded as voltages due to the effects of the dark current of the PSD1, the input offset voltage of the operational amplifiers OP1 and OP2, the input offset current, and the like. In addition, since the timing of detecting the position of the correction lens 2 during the shake correction control performed at a subsequent timing does not have a time lapse with the main adjustment timing, the factors of changes in Vd1 and Vd2 such as temperature changes can be ignored. If the yawing direction correction lens position LCY is calculated from Eq. 8 using V1 ′ and V2 ′ calculated in Eqs. 9 and 10 using the monitored Vd1 and Vd2, the dark current of PSD1 and the operational amplifier The influence of the input offset voltage, the input offset current, etc. can be canceled to accurately detect the corrected lens position.

In step S302, the light emitting diode LED1 is driven by the drive current calculated in the adjustment of the light emission amount (corresponding to the timing t22 in FIG. 25), and in step S303, the same method as the adjustment of the light emission amount is performed. Then, the correction lens 2 is gradually driven to the + movable end in the yawing direction.
Correction lens drive mechanism 7 in the yawing direction shown in FIG.
The input VoutY of Y is gradually increased from 0.0 [V] to +4.0 [V] between the timings t23 and t25 of FIG. As a result, the coil 11 in the yawing direction
The applied voltage of Y gradually changes from 0.0 [V] to +4.0 [V], and the correction lens 2 is gradually driven in the + direction of the yawing direction, and at the timing t24, the + side driving end (correction). (Lens position + 1.0 [mm] position).
When the correction lens 2 is driven to the movable end in the + direction, a time is secured until the bouncing at the time of collision of the correction lens 2 with the movable end is stopped and stopped in step S304, and then in step S305. Then, the detection unit outputs V1 and V2 of the correction lens position detection mechanism 5Y in the yawing direction are monitored (corresponding to timing t26 in FIG. 16), and the monitored voltages are set to V1 + and V2 +, respectively.

Next, at step S306, the correction lens 2 is gradually driven to the negative movable end in the yawing direction by the same method as the adjustment of the light emission amount. The input VoutY of the correction lens driving mechanism 7Y in the yawing direction shown in FIG.
Between timings t27 and t29 of 5, the voltage gradually decreases from +4.0 [V] to -4.0 [V]. As a result, the applied voltage of the coil 11Y in the yawing direction is +4.
It gradually changes from 0 [V] to -4.0 [V], and the correction lens 2 is gradually driven in the-direction of the yawing direction, and at the timing t28, the negative drive end (correction lens position-1.
It hits the position of 0 [mm]). When the correction lens 2 is driven to the − direction movable end, a time is secured until the bouncing at the time of collision of the correction lens 2 to the movable end is stopped and stopped in step S307, and then in step S308. Then, the detector output V1 and V2 of the correction lens position detection mechanism 5Y in the yawing direction are monitored (timing t in FIG. 25).
(Corresponding to 30), the monitored voltage is V1−, V2
−

Next, in step S309, the correction lens 2 is gradually driven near the base position in the yawing direction. Timings t31 to t in FIG. 25 are input to the input VoutY of the correction lens driving mechanism 7Y in the yawing direction shown in FIG.
Between 33, gradually increase from -4.0 [V] to 0.0 [V]. As a result, the applied voltage of the coil 11Y in the yawing direction gradually changes from -4.0 [V] to 0.0 [V], and the correction lens 2 is gradually driven near the original position in the yawing direction. It Next, step S310.
In step S311, the gamma adjustment value γ and shift adjustment value s are calculated by the method described later in step S311, and the correction lens position detection unit adjustment control in this yawing direction is performed in step S311. finish.

Next, the method of calculating the gamma adjustment value γ and the shift adjustment value s in step S311 of FIG. 26 is as follows. In the yawing direction + of the correction lens 2 obtained in step S305 of FIG. From the output voltage V1 +, V2 + of the detection unit when it hits the movable end in the direction
(Corresponding to the x coordinate of the point A in FIG. 24) is calculated, and the correction lens 2 obtained in step S308 is moved in the yaw direction −
Output voltage V1−, V2
From −, Expression 12 is used to calculate s− (corresponding to the x coordinate of the point B in FIG. 24). Next, using the obtained s + and s−, the shift corresponding to the calculation result of (V1′−V2 ′) / (V1 ′ + V2 ′) at the center position of the movable range of the correction lens 2 in the yawing direction is calculated by using Expression 14. The adjustment value s is calculated, and the gamma adjustment value γ corresponding to the slope of the straight line in FIG.

[0062]

S + = {(V1 +)-Vd1}-{(V2 +)
-Vd2} / {(V1 +)-Vd1} + {(V2 +)-Vd
2}

[0063]

S-= {(V1-)-Vd1}-{(V2-)
−Vd2} / {(V1 −) − Vd1} + {(V2 −) − Vd
2}

[0064]

Γ = 2.0 [mm] / {(s +)-(s-)}

[0065]

[Mathematical formula-see original document] s = {(s +) + (s-)} / 2 For the position detection in the yawing direction of the correction lens 2 used in the shake correction control performed at the following timing, the gamma adjustment calculated here is used. The value γ and the shift adjustment value s are used to calculate by Equations 8, 9, and 10.

Supplementally, the movable range of the correction lens 2 in the yawing direction, that is, the distance from one movable end to the other movable end (2.0 [mm] in the above example) is
Due to the mechanical design, it can be built within a certain allowable dimensional tolerance, and it is uniquely determined when assembling these movable mechanisms, and the variation factors after that are far greater than those affecting the correction lens position described above. The amount of fluctuation is small. Therefore, if the γ and s adjustment values are derived from the output of the detection unit when moving from one movable end to the other movable end by the method described above and the position of the correction lens 2 is detected using this, accurate detection can be performed. It will be possible.

Next, an embodiment of digital control for shake correction will be described. Digital control is also called sampling control, and it is common to perform predetermined control at predetermined time intervals. In the present embodiment as well, it is likely that the predetermined interval,
For example, it is assumed that the shake correction control described below is performed at intervals of 1 "ms".
A specific control example will be described using the flowchart of FIG.

The flow chart shown in FIG.
This is the description regarding the shake correction control in the yawing direction of the program of U1, from the time when the operation is permitted at the predetermined timing defined below to the time when the operation is prohibited at the predetermined timing defined below. Is a timer interrupt that repeats its operation for a predetermined time, for example, at an interval of 1 [ms]. It is assumed that the MPU 1 has a timer interrupt function that activates processing at a predetermined time interval in this way. The process starts from S400, and in step S401, the correction lens target position LCY in the yawing direction defined by the flowchart of FIG. 28 is calculated. Details will be described later. Next, in step S402, the correction lens position LRY in the yawing direction defined by the flowchart of FIG. 29 is calculated. Details will be described later. Next, in step S403, the correction lens drive amount VoutY in the yawing direction defined by the flowchart of FIG. 31 is calculated. Details will be described later. Next, in step S404, the correction lens drive mechanism 7Y in the yawing direction is driven by VoutY obtained in step S403. That is, as is apparent from the above description, the coil 11Y is driven by the current proportional to VoutY, and the driving force proportional to VoutY is applied to the mechanism of the correction lens 2 in the yawing direction. When the process of step S404 ends, the timer interrupt process of the yawing direction shake correction control ends in step S405.

Details of the yawing direction correction lens target position LCY calculation performed in S401 of FIG. 27 will be described below with reference to FIG. The process for calculating the yawing direction correction lens target position LCY starts from S500, and in step S501, the output V of the yawing direction shake detection mechanism 4Y is calculated.
ωY is monitored, and from that value, the angular velocity ω in the yawing direction
Calculate Y. Next, in step S502, the shake angle θCY generated in the yawing direction of the camera is calculated by integrating ωY. As described above, the output VωY of the yawing direction shake detection mechanism 4Y is obtained in proportion to the angular velocity of the camera in the yawing direction, and the angular velocity ωY in the yawing direction is calculated from the value, and the output is generated in the camera. The shake angle can be calculated. next,
In step S503, the deflection angle θC in the yawing direction
Correcting lens shift amount LC in the yawing direction for canceling the shake amount on the film surface of the correcting lens 2 from Y
Y is calculated, and in step S504, the process of calculating the target yaw direction correction lens target position LCY is ended, and the flow advances to step S402 in FIG. Here, LCY is hereinafter referred to as a correction lens target position in the yawing direction from the meaning corresponding to the target position in the control of the correction lens in the yawing direction performed thereafter.

The correction lens target position L in the yawing direction is calculated from the output VωY of the yawing direction shake detection mechanism 4Y described above.
To explain a little more about the process of calculating CY,
For example, ωY is converted from the output VωY (parameter is voltage) of the yawing direction shake detection mechanism 4Y into a parameter of angular velocity as shown in Expression 15, and the individual gain variations of the output of the yawing direction shake detection mechanism 4Y are corrected. ΩY is calculated by multiplying VωY by the conversion coefficient KωY. Further, the deflection angle θcY in the yawing direction can be theoretically obtained by integrating ωcY as shown in Expression 16. Here is the number 17
Is obtained by approximately integrating ωY for each sampling. Note that ts in Expression 17 is a sampling time interval, which corresponds to a starting interval by a timer interrupt in the process of calculating the yawing direction correction lens target position LCY,
ts is 1 [ms]. In addition, the yaw direction deflection angle θCY obtained by integrating or integrating ωcY
The integration constant (corresponding to θCY0 in the equations 16 and 17 and the initial value of the angle θCY due to the shake) is set to, for example, θCY0 = 0, and the optical axis direction may be the initial value of the shake angle. . Next, the correction lens target position LCY in the yawing direction is calculated by Expression 18. kLC is a coefficient for converting the deflection angle θCY in the yawing direction into the correction lens target position LCY which is an appropriate shift amount in the yawing direction of the correction lens 2, and is a value determined by the photographing optical system.
In the simplest case, if the taking optical system is a thin single lens with a focal length f and the thickness of the lens is negligible, then
It can be calculated as 9. Now the deflection angle θCY
If is small enough, Equation 19 can be approximated as Equation 20,
It is understood that the shake of the film surface can be corrected by shifting the correction lens 2 in the yawing direction by an amount proportional to θCY.

The numbers 15, 17, and 18 are combined into one,
The correction lens target position LCY is obtained by multiplying VωY by an appropriate conversion coefficient kY and integrating them at sampling intervals as shown in Expression 21.
May be calculated. In this case, the initial value LCY0 of the correction lens target position is set to 0, for example.

[0072]

(15) ωY = kωY × VωY

[0073]

[Equation 16] θCY = ∫ωYdt + θCY0

[0074]

## EQU17 ## θCY≈ΣωY × ts + θCY0

[0075]

(18) LCY = kLC × θCY

[0076]

[Formula 19] LCY = f × tan (θCY)

[0077]

[Formula 20] LCY≈f × θCY0

[0078]

[Formula 21] LCY≅Σ (kY × VωY) + LCY Next, details of the yawing direction correction lens position LRY calculation performed in step S402 of FIG. 27 will be described with reference to FIG. The process for calculating the yawing direction correction lens position LRY starts from step S510. In step S511, the detection unit outputs V1 and V2 of the yawing direction correction lens position detecting mechanism 5Y are monitored, and in step S512, , 9, 10 are used to calculate the correction lens position LRY in the yawing direction, the processing for calculating the main yawing direction correction lens position LRY is ended in step S513, and the process proceeds to step S403 in FIG.

Now, let us consider the transfer characteristics of the mechanism for shifting the correction lens 2 as described above. An elastically supported actuator as used in the present embodiment can be modeled by a spring, a viscosity, and a mass, and the number of motions is shown by equation 22.

[0080]

M × d2x / dt2 + c × dx / dt + kx = αi where x: correction lens position m: mass of the correction lens member movable part c: viscosity coefficient k: spring constant α: driving force constant i: coil 11Y drive current The transfer function of this actuator derived from here is
It is shown by the number 23.

[0081]

X / i = α / (ms2 + cs + k) From this transfer function, the optimum solution of the control system suitable for digital control using a known predetermined method is shown in FIG. A block diagram is shown. Although it is possible to realize the control of the correction lens by an analog circuit according to this block diagram, the digital control adopted in the embodiment will be described here.

The superiority of performing the correction lens control by digital control is as follows. A one-chip computer such as the MPU 1 used in the present embodiment for performing these controls requires a certain high-speed computing property, which may cause a cost increase of the camera. However, in recent years, the price of these one-chip computers has become lower,
The cost of the entire camera is almost the same as that of the case of using an analog circuit, or conversely, the cost is being reduced. In addition, each control parameter g0 used in FIG.
It is possible to easily change g1, g2, g3, etc., and it is possible to promptly respond to changes in the transfer characteristics of the controlled object due to changes in the design of mechanical factors, changes in the number of windings of the coil 11Y, etc., and This is advantageous in that it is not affected by variations in various control gains and frequency characteristics, temperature fluctuations, changes over time, etc.

Next, details of the process of calculating the correction lens drive amount VoutY performed in step S403 of FIG. 27 will be described with reference to FIG.
This will be described using the flowchart of No. 1. The process of calculating the correction lens drive amount VoutY is based on the control block diagram of FIG.
OutY is calculated. The process starts from step S520, and the open control term VoY is calculated in step S521. This open control term is expressed by the equation 24, and the correction lens target position LCY in FIG.
Means a voltage proportional to (proportional coefficient g0). The proportional coefficient g0 in the equation 24 is set, for example, based on the relationship between the applied voltage of the coil 11Y and the yawing direction correction lens position LRY in FIG. In the present embodiment, the correction lens 2 is set so as to substantially coincide with the correction lens target position LCY in a steady state after a sufficient time has elapsed when the output VoY in this item is used for control.

[0084]

VoY = g0 × LCY Next, in step S522, the correction lens position error ΔLY in the yawing direction is calculated using Expression 25. still,
Correcting lens target position L in the yawing direction used in Equation 25
The units of CY and the correction lens position LRY are the same.

[0085]

[Formula 25] ΔLY = LCY-LRY When the process of step S522 is completed, the position error proportional term VpY is calculated using formula 26 in step S523.

[0086]

[Equation 26] VpY = g1 * ΔLY Next, in step S524, the position error differential term VdY is given by Equation 27.
Is calculated using The expression ΔLY ′ is ΔLY at the time of the previous sampling, and the equation 27 is ΔΔ in FIG. 30 (a).
Corresponds to the portion obtained by multiplying the differential value of LY by the proportional coefficient g3, and
The derivative of L is the amount of change in ΔLY from the previous sampling Δ
It is approximately calculated by LY−ΔLY ′. Also, ΔL
It is assumed that Y ′ holds ΔLY at the time of the previous sampling, and ΔLY ′ at the time of the first sampling is a predetermined value so that this value does not become unstable at the time of the first sampling.
For example, it is set to 0.

[0087]

[Equation 27] VpY = g3 * (ΔLY−ΔLY ′) Next, in step S525, the position error integral term ViY is calculated by Equation 28.
Is calculated using Equation 28 is approximately calculated by integrating the integral portion of FIG.
The initial value of Y is a predetermined value, for example 0. In addition, Vpi
Y is calculated in the next S526, and here, the value at the time of the previous sampling is held and that value is used.
Since VpiY at the time of the first sampling is indefinite, a predetermined value, for example, 0 is calculated at the time of the first sampling.

[0088]

(28) ViY = Σ (ΔLY−VpiY) (Equation 28) Next, in step S526, the position error proportional-position error integral term VpiY is calculated using Equation 29.

[0089]

VpiY = g2 × (VpY + ViY) Next, in step S527, steps S524 and S526.
Using VdY and VpiY calculated in
The feedback control term VfY is calculated.

[0090]

VfY = VdY + VpiY Next, in step S528, VoY and VfY calculated in step S521 and step S527 are used to calculate equation 31.
By the final yawing direction correction lens drive amount Vou
tY is calculated, and in step S529, the correction lens drive amount V
The outY calculation process is terminated, and step S404 in FIG.
Proceed to.

[0091]

VoutY = VoY + VfY Note that each term VoY, VpY, V used in the description of FIG.
iY, VpiY, VdY, VfY, etc. are explained in the same terms as those used in FIG. FIG.
28, if described in detail, the yawing direction shake correction control activated at a predetermined sampling interval defined by 7.
The correction lens target position LCY is calculated by the processing of the flowchart defined by, the correction lens position LRY in the yawing direction is calculated by the processing of the flowchart defined in FIG. 29, and the processing of the flowchart defined by FIG. , The correction lens driving amount VoutY in the yawing direction is calculated, and the correction lens 2 is controlled in the yawing direction through the correction lens driving mechanism 7Y described above in S404 of FIG.

As described above, the correction lens is feedback-controlled by the correction lens target position LCY and the actual correction lens position LRY, and the control coefficients g0, g
1, g2, g3, etc. are derived from the transfer function of the correction lens mechanism system to be controlled, or from the actual control characteristics of the actual configuration mechanism, and the drive characteristics of the correction lens drive mechanism 7Y etc. are also taken into consideration. By optimizing it, accurate shake correction can be performed. Although not described below, the correction lens 2 is subjected to shake correction control in the pitching direction by the same control.

Next, the operation of the shutter circuit and the shutter will be described. First, FIG. 32 shows an operation timing example of an electromagnetic vertical traveling focal plane shutter generally used in a single-lens reflex camera or the like. This type of shutter is composed of a front curtain and a rear curtain (both not shown). Normally, both the front and rear curtains are positioned so as to cover the film aperture surface. At the time of exposure, first, by energizing the shutter front curtain magnet Mg1, the front curtain is disengaged, the elastic energy of the spring or the like causes the front curtain to start running on the film aperture surface, and exposure to the film surface is started. It Next, by starting to energize the shutter rear-curtain magnet Mg2 at a timing when the rear-curtain depends on the exposure time, the rear-curtain is unlocked, and the elastic energy of the spring or the like causes the rear-curtain to run on the film aperture surface. Finish the exposure. Normally, the strobe light emission signal output from the camera body is output at a predetermined timing when the shutter is fully opened, and when output, the strobe device flashes. still,
Both the front curtain and the rear curtain are moved to a position where the original film aperture surface is covered by a known method at a predetermined timing.

Next, the shutter drive mechanism 6 will be described. FIG. 33 is a circuit diagram showing a circuit portion of a drive mechanism of (a) shutter front curtain magnet Mg1 and (b) shutter rear curtain magnet Mg2. In this mechanism, by setting the shutter front curtain magnet signal SMG1 to the high level, the transistor Tr2 is turned on and the shutter front curtain magnet Mg1 is energized. Conversely, the shutter front curtain magnet signal S
By setting MG1 to Low level, the transistor T
r2 is turned off, and the shutter front curtain magnet MG1 is in a non-energized state. Similarly, the shutter rear curtain magnet signal SM
By setting G2 to High level, the transistor T
r3 is turned on, and the shutter rear curtain magnet Mg2 is energized. Conversely, the shutter rear curtain magnet signal SMG2
Is set to a Low level, the transistor Tr3 is turned off, and the shutter rear curtain magnet Mg2 is turned off. The shutter front curtain magnet signal SMG1 and the shutter rear curtain magnet signal SMG2 are connected to the MPU1, and the MPU1 has a shutter front curtain magnet Mg1 and a shutter front curtain magnet M at arbitrary timing.
The energization and de-energization of g2 can be controlled.

Next, the shake correction control during exposure will be described with reference to FIG. In detail, the shake correction control at the time of exposure when using the above-described electromagnetic vertical traveling focal plane shutter will be described. The shake correction at the time of exposure must be started at least before the opening of the shutter and performed until the end of exposure. Here, as described above, a large current flows instantaneously at the timing of starting energization of the shutter front curtain magnet Mg1 and the shutter rear curtain magnet Mg2 and the timing of strobe light emission, and electrical noise is induced by it. The generated noise affects the correction lens position detection mechanisms 5Y and 5P that handle extremely small currents, and a large amount of noise is mixed into the output. Therefore, in the present embodiment, the shake correction control for a predetermined time from the above timing is open control. The shake correction control at other timings is closed control using the correction lens position information. The open control in the shake correction control is to control the correction lens 2 only by the correction lens target position LCY in FIG. 30 (a) as a result. The following method can be considered as a specific method.

That is, the control method shown in FIGS. 30 (b), 30 (c) and 30 (d) is different from the control of the closed control in which the correction lens position LRY shown in FIG. 30 (a) is used for control. The control block diagram shown in FIG. 30B is a block diagram when the correction lens 2 is controlled only by the voltage proportional to the correction lens target position LCY, that is, the open control term. FIG.
The control block diagram shown in 0 (c) is the correction lens position LR.
Y is always set to the same value as the correction lens target position LCY, and the correction lens drive mechanism is driven by the control amount obtained by the control block diagram similar to the control shown in FIG.
As a result, the open control based on the correction lens target position LCY is shown.

Finally, in the control block diagram shown in FIG. 30 (d), the gain coefficients g1, g2, g3 in the control block diagram similar to the control shown in FIG. Open control is performed based on the lens target position LCY. This shake correction control operation will be described with reference to the timing chart of FIG. It should be noted that shake correction is started at a timing t41 slightly before the shutter front curtain is run, and the shake correction control is finished at t45 after the shutter rear curtain has finished running and exposure is finished, during which t42 will be described below. From t43 to t4, and from t44 to t4, open control is performed, and at other timings, closed control is performed.

The predetermined time from t42 is the timing from the timing t42 at which the energization of the shutter front curtain magnet Mg1 is started, and then the electrical noise of the correction lens position detection mechanism 5Y and 5P due to the energization of the shutter front curtain magnet Mg1 It is a predetermined time until the influence is suppressed, and the shake correction control during this period is open control. The predetermined time from t43 is
By setting the strobe light emission signal to High at t43,
After the strobe mechanism 23 operates and the strobe light is emitted, the correction lens position detection mechanism 5 by this strobe light emission
It is a predetermined time until the influence of electrical noise on Y and 5P is suppressed, and the shake correction control during this period is open control. In this case, the strobe mechanism 23 is already charged at a known timing at this timing by the mechanism configured by a known technique, and in FIG.
The strobe emits light according to the high level of the strobe light emission signal. Further, the strobe mechanism 23 is
Of course, the type built into the camera body may be an external strobe attached to the accessory shoe. Even if it is an external type, it is triggered by a huge electric current (this current may reach 200 [A] to 300 [A] in the case of a large amount of light) instantaneously flowing through the arc tube during flash firing. The influence of electrical noise on the correction lens position detection mechanisms 5Y and 5P is large.

Next, the predetermined time from t44 means the electrical noise to the correction lens position detecting mechanisms 5Y and 5P due to the energization of the shutter rear curtain magnet Mg2 from the timing t44 when the energization of the shutter rear curtain magnet Mg2 starts. Is a predetermined time until the influence of is suppressed, and the shake correction control during this period is open control. Next, the control during exposure of the electromagnetic vertical traveling focal plane shutter will be described with reference to the flowcharts of FIGS. The flowchart of FIG. 34 describes the exposure control in the program of the MPU 1, and the operation is started at a predetermined timing defined later. The open control in the shake correction control is performed by the control method shown in FIG. 30D, that is, the gain coefficients g1, g2, and g3 are set to zero, and as a result, the correction lens target information is not used. Control is performed by the method of performing open control based on the position. Further, other than this, for example, the method of FIGS. 30B and 30C or another method may be used, and as a result, the shake correction control may be performed without using the correction lens position information. .

The process of the main exposure control is started from step S200, the shake correction is started in step S201 (corresponding to timing t41 in FIG. 32), and step S20.
Wait until the shake correction control stabilizes in step 2, change the shake correction control to open control in step S203, and set the shutter front curtain magnet signal to High (corresponding to timing t42 in FIG. 32) in step S204. The curtain magnet Mg1 is energized to start traveling of the shutter front curtain. Next, after waiting a predetermined time in step S205, the shake correction control is changed to closed control in step S206.

To start the shake correction performed in step S201, specifically, the shake correction control in the yawing direction (timer interrupt) and the shake correction control in the pitching direction (timer not shown) defined in FIG. 27 are performed. interrupt)
Is to permit the operation of each process. As a result, the shake correction control in the yawing direction and the pitching method is started as described above. Incidentally, the control block diagram in the shake correction control at this point is defined in FIG. 30 (a), and the shake correction is performed by the closed control with high accuracy. Waiting until the shake correction control in step S202 becomes stable means that step S20
It is a process of waiting for a certain time from the start of the shake correction control in 1 until the stable shake correction control is performed. This stabilization time is several [ms] to several 1
It is about 0 [ms]. In order to change the shake correction control to the open control in step S203, in this case, the control coefficients g1, g2 and g3 in FIG. 30 (a) are set to zero, that is, shown in FIG. 30 (d). The control is changed to the control block diagram, and the open control is performed in which the correction lens position information is not substantially used and the control is performed only by the correction lens target position information. Waiting for a predetermined time in step S205 means
Shutter front curtain magnet Mg performed in step S204
Correction lens position detection mechanism 5Y due to the effect of energization of 1;
This is a process of waiting a time until the influence of the output noise of 5P on the shake correction control can be ignored. Step S20
To change the shake compensation control in 6 to closed control, in this case, the current control coefficients g1, g2, g3 are set to zero and the shake compensation control is changed from the open control state to the control coefficients g1, g2, Change the normal value of g3,
It is to change to the closed control indicated by 0 (a).
From this time point, accurate shake correction control is performed.

Next, when the processing in step S206 is completed, a predetermined time is waited in step S207, and then step S2
In 08, the shake correction control is changed to open control by the same method as the processing in step S203, and in step S209 the strobe light emission signal is set to High (corresponding to the timing t43 in FIG. 32) to operate the strobe mechanism 23. The strobe is caused to emit light, and in step S210, wait for the time until the influence of the output noise of the strobe emission correction lens position detection mechanism 5Y, 5P is stopped, and in step S211, the shake correction control is performed by the same method as the processing in step S206. Is changed to closed control. Here, the process of waiting for a predetermined time in step S206 is to emit the strobe light in step S209 after the shutter front curtain started in step S204 is completed and the shutter is fully opened. belongs to.

Next, when the process of step S211 is completed, the time depending on the shutter seconds is waited in step S212.
In step S213, the shake correction control is changed to open control in the same manner as the processing in step S203, and in step S214
Then, the shutter rear curtain magnet signal is set to High (corresponding to the timing t44 in FIG. 32) to energize the shutter rear curtain magnet Mg2, and the traveling of the shutter rear curtain is started. Next, in step S215, wait for the time until the influence of the output noise of the correction lens position detection mechanisms 5Y and 5P due to the energization of the shutter rear curtain magnet is stopped, and in step S216, the shake correction control is performed by the same method as the processing of step S206. Is changed to closed control, the shutter rear curtain travel is completed in step S217, the shutter is closed, that is, the exposure is waited, and the shake correction control is ended in step S218 (corresponding to timing t45 in FIG. 32). Then, in step S219, the shutter front curtain magnet signal SMG1, the shutter rear curtain magnet signal SMG2, and the strobe light emission signal are returned to their original phases, that is, Low (corresponding to the timing t46 in FIG. 32), and the main exposure control is performed in step S220. Ends the process.

Here, waiting for the time depending on the shutter seconds in step S212 means a time other than this timing (for example, steps S204 to S211 and step S21).
213 to the processing time of step S215, etc.) means that the exposure time on the film surface is finally waited so that the exposure time can be properly obtained at the expected shutter speed. Further, ending the shake correction performed in step S218 specifically means prohibiting the processing operation of the shake correction control (timer interrupt) defined in FIG. The shake correction control of the yawing direction and the pitching method, which have been used, ends.

As described above, the shake correction shown in FIG. 30A can be performed during exposure using digital control. Further, as shown in FIG. 32, the shake correction control is open-controlled for a predetermined time from the timing of energizing the shutter front curtain magnet and the shutter rear curtain magnet, or the timing of emitting the strobe light.
The shake correction control can be performed without using the shake correction lens position information so as not to be affected by the electrical noise of the correction lens position detection mechanisms 5Y and 5P. It is to be noted that a predetermined time period (corresponding to a predetermined time period of S205) in which the shake correction control is open-controlled after the shutter front curtain magnet is energized, and a predetermined time period (corresponding to a predetermined time period of S215) in which the shake correction control is open-controlled after the shutter rear curtain magnet is energized. ), And a predetermined time (S210
(Corresponding to a predetermined time) is determined by the output noise level of the correction lens position detection mechanisms 5Y and 5P at each timing, the duration of the noise, etc., and the time is set independently.

Next, another embodiment of the control at the time of exposure of the electromagnetic vertical traveling focal plane shutter will be described with reference to the flowcharts of FIGS. The flowcharts shown in FIGS. 36 and 37 describe the exposure control in the program of the MPU 1, and the operation is started at a predetermined timing defined later. Note that the processes defined in FIGS. 36 and 37 are the same as those shown in FIGS.
The open control timing of the processes defined by Nos. 4 and 35 is simplified as follows. The open control is performed between timings t41 and t42 of FIG. 32, a predetermined time from t42, a predetermined time from t43, and each of t44 to t45. Other controls are the same as those in FIGS.

The process of the main exposure control is started from step S250, and in step S251, the control coefficients g1 and g
2, the g3 is set to zero and the operation of each processing of the shake correction control (timer interrupt) defined in FIG. 27 is permitted to start the shake correction control of the yawing direction and the pitching method (at timing t41 in FIG. 32). Equivalent to). Therefore,
This shake correction control is an open control in which the control coefficients g1, g2, g3 are set to zero. Next, in step S252, until the shake correction control is stabilized, the shutter front curtain magnet signal is set to High (corresponding to the timing t42 in FIG. 32) in step S253, and the shutter front curtain magnet M is set.
Energize g1 to start traveling of the shutter front curtain. next,
In step S254, control is performed in step S255 after waiting for a predetermined time until the influence of the energization of the shutter front curtain magnet Mg1 on the shake correction control of the output noise of the correction lens position detection mechanisms 5Y, 5P becomes negligible. The coefficients g1, g2, g3 are changed to normal values, and the shake correction control is changed to closed control.

Next, when the process of step S255 is completed, in step S256, at least the time for the shutter front curtain to start traveling in step S253 is completed and the shutter is fully opened, and in step S257. Control coefficient g1, g
2, the shake correction control is changed to open control by setting g3 to zero, and the strobe light emission signal is set to High in step S258.
At time h (corresponding to the timing t43 in FIG. 32), the strobe mechanism 23 is operated to make the strobe emit light, and step S
Compensation lens position detection mechanism 5 for strobe emission in 259
Waiting for a time until the influence of Y, 5P output noise is suppressed, in step S260, the shake correction control is changed to the closed control by the same method as the processing in step S255.

Next, when the processing of S step 260 is completed, a time depending on the shutter second is waited in step S261, and in step S262, the shake correction control is changed to open control by the same method as in the processing of step S257. Step S
At 263, the shutter rear curtain magnet signal is set to High (see FIG. 32).
(Corresponding to the timing t44), the shutter rear curtain magnet Mg2 is energized to start traveling of the shutter rear curtain. Next, in step S264, the influence of the output noise of the correction lens position detection mechanisms 5Y and 5P due to the energization of the shutter rear curtain magnet is reduced, and the traveling of the shutter rear curtain is completed and the shutter is completely closed, that is, the exposure is completed. Wait until the end, and in step S265, the yawing direction shake correction control (timer interrupt) defined in FIG. 27, and similarly, the respective processes of the pitching direction shake correction control (timer interrupt) are defined. By prohibiting the operation, the shake correction control of the yawing direction and the pitching method is completed (corresponding to the timing t45 in FIG. 32), and S26
At 6 the shutter front curtain magnet signal SMG1, the shutter rear curtain magnet signal SMG2, and the strobe light emission signal are returned to the original phase, that is, Low (corresponding to the timing t46 in FIG. 32), and the main exposure control processing ends at step S267. To do.

Further, the processing shown in FIGS. 36 and 37 is further simplified, and the shake correction is performed by the open control from the timing of timing t41 in FIG. 32 to the passage of a predetermined time after the shutter front curtain magnet is energized. It doesn't matter what you do. By the above method, at least at the timing when the electrical noise of the outputs of the correction lens position detection mechanisms 5Y, 5P affects, the correction lens position information is not used so that the shake correction control is not affected by this electrical noise. The shake correction control can be performed, and at other timings, the shake correction control can be performed with high accuracy using the correction lens position information.

Next, a description will be given of a shake correction operation at the time of exposure of a lens shutter which has been widely used in a shutter of a silver salt compact camera in recent years. In this embodiment, it is assumed that a two-phase excitation type stepping motor, which is one of the actuators most often used as an actuator for opening and closing the lens shutter, is used. Such a lens shutter is
For example, when the excitation phases of the two coils, the first phase excitation coil and the second phase excitation coil, which form the stepping motor, are represented by (+, +) ) → (−, +) → (−, −) → (+, −)
→ The shutter opens by changing the excitation phase in the order of (+, +) ..., and conversely, (+, +) → (+,-)
The shutter is closed by changing the excitation phase of each coil in the order of → (-,-) → (-, +) → (+, +). The shake correction control is generally started at least before the opening operation of the shutter and ended when the closing operation of the shutter ends. It should be noted that in the strobe light emission in the lens shutter, the shutter aperture F value that uniquely obtains the optimum exposure amount by the strobe light is determined according to the subject distance, and the strobe light is emitted at the timing when the shutter reaches this aperture F value. The so-called flashmatic control is generally performed. Therefore, in this case, the strobe emits light between the timing t54 when the shutter starts to open and the timing t56 when the shutter fully opens in FIG.

Here, as in the case of the above-mentioned electromagnetic vertical traveling focal plane shutter, the timing for controlling the power supply to the stepping motor for opening and closing the shutter,
And, at the timing of strobe emission, a large current flows instantly, which causes electrical noise,
Correction lens position detection mechanism 5Y, 5P that handles extremely small current
Influences and a lot of noise is mixed into the output.
Therefore, in the present embodiment, the shake correction control is set to the open control at the timing that affects the correction lens position detection mechanisms 5Y and 5P. Specifically, as shown in the timing chart of FIG. 38, the shutter 3 is set to open control during opening and closing, and closed control is set during opening of the shutter. In addition, the flash emission is in the middle of the opening of the shutter 3 and is naturally open control.
The open control in the shake correction control uses the same control method as that of the above-described vertical traveling focal plane shutter. When the lens shutter camera is used, the shutter drive mechanism 6 in this case uses a well-known technique, for example, a general-purpose H-bridge type motor driver, and the first phase of the stepping motor is well-known. It suffices to realize the excitation phase in an arbitrary direction as described above in the excitation coil and the second phase excitation coil.

FIG. 38 is a timing chart showing the opening / closing operation of the shutter 3, the light emission operation of the strobe mechanism 23, and the shake correction control operation during exposure. The outline of the shake correction control at the time of exposure of the lens shutter camera will be described with reference to the timing chart shown in FIG. The shake correction control starts the closed control from the timing t57 when the shutter is opened to the open F value, that is, when the shutter is completely opened. Next, the shake correction is changed to the open control from the timing t58 immediately before the timing t59 at which the shutter starts to be closed, and the shake correction control is ended at the timing t61 after the shutter closing operation is completed. In addition, in FIG. 38,
The strobe is at a timing t when the shutter starts to open slightly.
It emits light at a timing t55, which is TSB time after 54.

Next, the control during exposure of the lens shutter camera will be described with reference to FIG. The flowchart shown in FIG. 39 describes an embodiment in the case of a lens shutter camera regarding exposure control in the program of the MPU 1, and its operation is started at a predetermined timing defined later. The open control in the shake correction control is performed by the control method shown in FIG. 30D, that is, the gain coefficients g1, g2, and g3 are set to zero, and as a result, the correction lens target information is not used. Control is performed by the method of performing open control based on the position. Further, other than this, for example, the method of FIGS. 30 (b) and 30 (c) or another method may be used to result in the shake correction control without using the correction lens position information.

The process of the main exposure control starts from step S280, and in step S281 the stepping motor is excited to the initial excitation phase (+, +) phase (corresponding to timing t51 in FIG. 39). Next, step S
28, the control coefficients g1, g2, and g3 are set to zero in FIG.
The yawing direction and pitching method are enabled by permitting the respective operations of the yawing direction shake correction control (timer interrupt) specified in 1. and the pitching direction shake correction control (timer interrupt) specified in the same manner. The shake correction control is started (corresponding to timing t52 in FIG. 38). Therefore, this shake correction control is controlled by the control coefficient g
This is an open control in which 1, g2 and g3 are set to zero. next,
In step S283, the stabilization correction control waits until the flash emission timing is determined by a known technique in step S284, and the flash is set to emit light at the determined timing. Next, in step S285, the stepping motor is moved to (+, +) → (-, +) → (-,
By changing the excitation phase in the order of −) → (+, −) → (+, +) ... The stepping motor is operated to open the shutter (corresponding to timing t53 to t56 in FIG. 38). The strobe emits light at a predetermined timing from t53 to t56 (corresponding to the timing t55 in the example of FIG. 38). As for the light emission timing of the strobe mechanism 23, for example, if the MPU 1 has a timer interrupt function, that function is used. By raising the signal for a moment to High, the strobe mechanism 23 is operated to cause the strobe to emit light. If the time from t53 to t54 is always constant, T
The BS measurement base timing may be set to t53 instead of t54, that is, step S284 in FIG. 39 may be used as the reference of the strobe light emission timing.

When the process of step S285 is completed, the control coefficient g relating to the shake correction control is obtained in step S286.
Normal values of 1, g2 and g3 are changed, and the shake correction control is changed to closed control (corresponding to timing t57 in FIG. 38). Next, when the process of step S286 is completed, a time depending on the shutter second is waited in step S287, and in step S286, control coefficients g1 and g related to the shake correction control are set.
2. The shake correction control is changed to the open control by setting g3 to zero (corresponding to the timing t58 in FIG. 38). Next, in step S289, the stepping motor is moved to (+, +) → (+, −) → (−, −) → (−, +).
→ The shutter is closed as usual by changing the excitation phase in the order of (+, +) (timing t59-
equivalent to t61). When the process of step S289 is completed, the operation of the shake correction control (timer interrupt) process defined in FIG. 27 is prohibited in step S290 to end the shake correction control of the yawing direction and the pitching method (see FIG. 38). (Corresponding to the timing t62) in step S291), the stepping motor is de-energized (corresponding to the timing t63 in FIG. 38) in step S291, and the process of the main exposure control ends in step S292.

By the method as described above, at least at the timing when the electric noise of the outputs of the correction lens position detecting mechanisms 5Y and 5P influences the correction lens position information so that the shake correction control is not influenced by the electric noise. It is possible to perform the shake correction control without using the shake correction control, and to perform the shake correction control with high accuracy using the correction lens position information at other timings.

Next, the correction lens position detecting mechanisms 5Y, 5P
An embodiment of a method for detecting the gravitational direction with respect to the camera body and the method for detecting the holding direction of the camera using the output of the above will be described. First, the outline of the detection method will be described below. An average of the correction lens positions in the yawing direction and the pitching direction from when the half-push switch SW1 is pressed until at least the full-push switch SW2 is turned on is calculated. This method of calculating the average value of the correction lens position is performed by sampling the outputs V1 and V2 of the correction lens position detection mechanisms 5Y and 5P at predetermined time intervals, and correcting the sampled values using Equations 8, 9 and 10 as described above. Calculate the lens position. now,
The correction lens position at the i-th sampling in the yawing direction is LRY (i), and the correction lens average position LRY0 in the yawing direction when the number of samplings is n
Is calculated by Equation 32. Similarly, the correction lens at the i-th sampling in the pitching direction is LRP (i),
The correction lens average position LRP0 in the pitching direction when the number of times of sampling is m is calculated by Expression 33.

[0119]

(Equation 32)

[0120]

[Expression 33] Incidentally, the coordinates of the position of the correction lens 2 used in the following are expressed as (correction lens position in yawing direction, correction lens position in pitching direction), and the user holds the camera in the horizontal position for convenience as shown in FIG. When the camera is viewed from the film surface side, the right lateral direction is defined as the yawing + direction and the upward direction is defined as the pitching + direction. FIG. 41 shows the correction lens average position LR0 (LRY0, LR) thus obtained.
An example of P0) is shown. In FIG. 41, the correction lens average position L
The coordinates of R0 are (-0.1 [mm], -0.2 [mm])
Shows an example of. Now, consider a case where the camera is stopped so that the optical axis of the photographing lens and the direction of gravity are parallel to each other. In this case, the correction lens 2 is not affected by gravity and stands still at a position where the elastic forces supporting the correction lens 2 are balanced. This position is LR1 (LRY1, LRP1). here,
The correction lens average position LR0 at the time of half-pressing is represented by the formula 34 with the coordinate LR0 ′ based on LR1. FIG.
Then, the coordinate LR0 ′ = (− 0.4 [mm], −0.4
[Mm]) is calculated.

[0121]

LR0 ′ = (LRY0 ′, LRP0 ′) = (LRY0−LRY1, LRP0−LRP1) When the corrected lens average position coordinates LR0 ′ from the elastic force balance position coordinates shown in Expression 34 are regarded as one vector. , That direction indicates the direction of gravity with respect to the camera, that is, when the direction of gravity is taken as a reference, it means the rotation of the camera in the optical axis direction, and its magnitude means its influence.

Now, assume that the user holds the camera as follows, as shown in FIG. It is assumed that the camera is tilted in the counterclockwise direction by + θg with respect to the rotation method about the photographing optical axis when viewed from the film surface side, and is tilted by θh with respect to the horizontal direction. The following relationships are established between θg and θh and the coordinate LR0 ′. First, in the vectors LR0 ′ and θg,
The relationship of 5 holds.

[0123]

(35) θg = tan-1 (LRY0 '/ LRP
0 ′) + kg × π where, if LRY0 ′ ≦ 0 and LRP0 ′ ≦ 0, kg = 0, and if LRY0 ′> kg = 1, LRY
When 0 ′> 0 and LRP0 ′> 0, kg = 2 and the range of θg is −π to + π. In addition, LRP0 '/
When LRP ′ = ∞, when LRY0 ′> 0, θg = −π /
2. When LRY0 ′ <0, θg = + π / 2. For example, in the example of FIG. 41, the coordinate of the elastic force balance position LR1 is at the position (+0.3 [mm], +0.2 [mm]), and the correction lens average position coordinate LR0 from the elastic force balance position LR1. 'Is (-0.4 [mm], -0.4 [m
m]). In this case, it can be calculated that the user is tilted counterclockwise by θg = + π / 4 when viewed from the film surface side. The coordinates of the elastic force balance position LR1 are measured at the time of shipment of the camera and stored in the EEPROM 24 as adjustment values.

Next, the size fg of the vector LR0 'is
It is expressed by Expression 36, and fg and θh are in the relationship of Expression 37.

[0125]

Fg = √ (LRP0'2 + LRY0'2)

[0126]

[Equation 37] | θh | = cos-1 (fg / fg0) where | θh | is in the range of 0 to + π / 2, and fg0 is the camera at the position of θh = 0, that is, in the horizontal direction. This is the value of fg in this case, and this value is measured before shipment from the camera and written in the EEPROM 24 as an adjustment value.
It should be added that in the detection by the bias of the correction lens position due to gravity as in the present embodiment, the absolute value of θh can be detected, but theoretically the sign cannot be derived.

As described above, the information on the tilt of the camera is obtained from the deviation of the position of the correction lens 2 which is affected by the gravity. Next, a specific method of obtaining the average position LR0 of the correction lens 2 and LR0 ′ obtained by converting the coordinate system will be described with reference to the flowchart of FIG. Here, the MPU1 is used so that it can be easily controlled by a one-chip computer or the like.
An example in which the sampling control is performed by the method is shown in the flowchart of FIG. The flow chart shown in FIG.
In the program of U1, an embodiment regarding the correction lens position integration processing in the yawing direction is described.
From the start of the operation at a predetermined timing defined below to the prohibition of the operation at a predetermined timing defined below, a predetermined time interval, for example, 1
This is a timer interrupt process that repeats the operation at intervals of [ms]. The MPU 1 has a timer interrupt function that activates processing at a predetermined time interval in this way. It should be noted that while the correction lens position integrating process in the yawing direction is permitted, the half press switch SW1 is turned on (corresponding to the timing t71 in FIG. 40) by the user half pressing the release button of the camera. The operation is started (corresponding to timing t72 in FIG. 40), and the operation is performed in response to the release switch SW2 being turned on (corresponding to timing t73 in FIG. 40) by the user fully pressing the release button of the camera. Is prohibited (corresponding to timing t74 in FIG. 40).

The processing of FIG. 43 is started from step S150, the outputs V1 and V2 of the correction lens position detecting mechanism 5Y in the yawing direction are monitored in step S151, and the step S150 is executed.
At 152, the correction lens position LRY in the yawing direction is calculated using the above equations 8, 9, and 10. Next, in step S153, the correction lens position LRY in the yawing direction is set.
And the integrated value is SLRY, and in step S154, the number of times n the correction lens position in the yawing direction is integrated is incremented by 1,
In S155, the correction lens position integration processing in the yawing direction is completed. The initial value of the integrated value SLRY in the yawing direction and the integrated number n in the yawing direction is set to 0, and SLRY and n are set to 0 at the first sampling when the correction lens position integrating process in the main yawing direction is permitted. And In this way, the correction lens position in the yawing direction is integrated for each sampling.

Next, the operation of the correction lens position integration processing in the main yawing direction is prohibited at the timing to be described later, and from the integrated value SLRY at that time and the number of integrations n,
The correction lens average position LRY0 is calculated based on That is, the ΣLRY (i) part of the equation 32 corresponds to SLRY, and the corrected lens average position LRY0 is calculated by dividing SLRY by the number of times of integration n. The correction lens average position LRP0 in the pitching direction is also calculated using the same method as above. Number 3 using LRY0 and LRP0
4, 35, 36 and 37 calculate the camera inclination θg and | θh | as described above.

Next, the correction lens average position LRY0 in the yawing direction and the pitching direction calculated by the above method,
An embodiment of a method of using LRP0, camera inclination θg, and | θh | will be described. First, in the case of calculating one object distance information or a defocus amount of a photographing lens from a plurality of distance measurement values in a multi-point distance measurement type camera,
Information on the inclination θg and | θh | of the camera is used. Alternatively, when the final one photometric value is calculated from the multi-segment photometric value in the multi-segment photometric type camera, the information of the camera inclination θg and | θh | is used. The details will be described below.

Now, it is assumed that the distance measuring mechanism 21 outputs subject distance information of p different areas within the photographing field angle or the defocus amount of the photographing optical system. AF the distance measurement values of the p areas output from the distance measurement mechanism 21
(1), AF (2), ..., AF (i), ... AF
In the case of (p), the final distance measurement value AF is calculated by using Expression 38.

[0132]

(38) Here, kf (i) is the distance measurement value AF of the i-th area
Equation (38) is a weighting value of (i), and means that a distance measurement value of each area and a weighted average by the weighting value are calculated. Here, the weighting value kf (i) (i
= 1, 2, 3, ... P) depends on the above-mentioned camera inclinations θg and | θh |

[0133]

Kf (i) = f (θg, | θh |) where i = 1, 2, 3, 4 ... P. Further, kf (i) of the area where the distance measurement value is not obtained is set to 0. This is because, depending on the form of the distance measuring mechanism 21, for example, when the distance measuring mechanism 21 is a passive-type distance measuring mechanism, the distance measuring value is not always obtained in the entire region. In that case, the weighting value kf (i) of the area where the distance measurement value is not obtained is set so that the distance measurement value of the area where the distance measurement value is not obtained is not included in the weighted average calculated by the equation 38. It shall be 0.

Next, the photometric mechanism 22 outputs subject brightness information of q different areas within the photographing field angle. The unit of the subject brightness is, for example, BV (brightness value) according to the APEX direction. The distance measurement values of the q areas output from the distance measuring mechanism 21 are AE (1), AE (2), ..., AE (i) ,.
When AE (q) is used, the final photometric value AE is calculated using equation 40.

[0135]

(Equation 40) Here, kf (i) is the photometric value AE of the i-th region
It is a weighting value of (i), and Equation 40 means to calculate a photometric value of each area and a weighted average by the weighting value. Here, the weighting value kf (i) (i
= 1, 2, 3, ..., Q) is determined depending on the above-described camera inclinations θg and | θh |

[0136]

## EQU00004 ## ke (i) = f (.theta.g, | .theta.h |) Equation 41 where i = 1, 2, 3, 4 ,. Next, the distance measurement value of each area and the weighting values kf (i), ke of the photometric value
A specific example of the embodiment of setting (i) will be described. Now, it is assumed that the distance measuring area of the distance measuring mechanism 21 is arranged with respect to the photographing field angle as shown in FIG. 44 and the number of areas p = 9. Similarly, the photometric area of the photometric mechanism 22 is arranged with respect to the photographing field angle as shown in FIG. 45, and the number of areas q = 9. At this time, the tilt of the camera and the weighting value kf (i) of the distance measurement value of each area
(I = 1, 2, 3, ..., 9), weighting value k of photometric value
An example of e (i) (i = 1, 2, 3, ..., 9) is shown in FIG.
(a) (b), 47 (a) (b), 48 (a) (b). The left figure in each of these figures shows the tilt of the camera when the camera is viewed from the rear film side, and the center figure of each shows the tilt of the camera when viewed from the right side of the camera. The right figure of
The weighted value of the distance measurement value and the weighted value of the photometric value of each area at that time are shown. In the right figure, the numerical values arranged in the same areas as the distance measuring area and the light measuring area in FIGS. 44 and 45 indicate the distance measuring value and the weighting value of the light measuring value in the area. In this example, the weighting value of the distance measurement value and the weighting value of the photometry value in each area are common values. FIG.
6 (a) is a weighting value of a distance measurement value of each area and a weighting value of a photometry value when the camera is held in a horizontal position (corresponding to θg = 0) and a horizontal position (corresponding to θh = 0). It is the figure which showed the example of. The way of holding the camera as shown in FIG. 46 (a) is the most general way of holding, and the weighting value of each area at that time gives priority to the center of the angle of view where the existence of the subject is likely to be highest, and Weighting was kept small. Figure 46 (b),
47A, the camera is held at the lateral position (corresponding to θg = 0) and the camera is directed upward (θh = about +30).
(Corresponding to °), and downward (θh = about −
It is the figure which showed an example of the weighting value of the ranging value of each area | region in the case of (30 degrees), and the weighting value of a photometric value. As described above, the method of calculating the tilt information of the camera from the average position of the correction lens as in the present embodiment cannot detect the difference between the upward and downward directions as in this example. This is θ
This is because the sign cannot be detected even if the absolute value of h can be detected. Therefore, the weighting values of the regions in FIGS. 46B and 47A are the same, the weighting of the central region is high, and the weighting of the upper and lower regions is low. This is because when the camera is held upward, strong retrograde rays such as sunlight may enter the upper part of the angle of view, affecting the distance measurement value and the photometric value, so reduce the weighting value in the upper area. Also, when the camera is held downward, light from a dark object such as the ground is incident on the lower part of the angle of view, and the distance measurement value AF and the photometry value AE calculated by the final numbers 38 and 40 are obtained. It may have an impact. On the other hand, since it is difficult to distinguish between the upward and downward directions of the camera as described above, the weighting values at the upper and lower parts of the angle of view are kept small by taking these into consideration. FIG.
7 (b), FIG. 48 (a), and FIG. 48 (b) hold the camera in the horizontal direction of the optical axis (corresponding to θh = 0), and FIG.
7 (b), FIGS. 48 (a) and 48 (b), respectively, are slanted counterclockwise (corresponding to θg = about + 30 °) and slanted clockwise (θg).
g = corresponding to about −30 °), and the weighting value of the distance measurement value of each area and the weighting value of the photometry value when rotated counterclockwise by 90 ° (corresponding to θg = + 90 °) It is the figure which showed the example of. In this case, the weighting in the direction of gravity is increased, and the weighting is decreased in other regions.

In the above description, the weighting value of each area of the distance measurement value and the photometric value is common, but they may be set separately, and the weighting of each area is set to 1 in the above description.
However, other than this, the camera inclination θg and | θh | may be set more finely, and conversely, the weighting values 0 and 1 may be set. Only the distance measurement value or the light measurement value in that area may be selected or not selected.

As described above, in the conventional camera, the tilt of the camera depending on how the user holds the camera has had a great influence on the distance measuring performance and the photometric performance. It is possible to greatly reduce the distance measurement and greatly improve the distance measurement performance and the photometry performance. Next, since the correction lens 2 is supported by the elastic force, the steady-state position is at the center of the correction lens movable range due to the bias of the elastic force as described above, or due to the weight of the movable member of the correction lens 2 or the like. The position is off. Further, the influence of the bias of the elastic force may become more remarkable due to the change over time of the mechanism of the correction lens 2 and the like, deterioration, and the like, and the influence of the self-weight causes the user to hold the camera, that is, the tilt of the camera. The direction and amount of the influence change depending on.
When the shake correction control as described above is performed with a large deviation of the position of the correction lens in this way, the shake correction control accuracy is naturally affected. Therefore, FIG.
By changing the control block diagram of the correction lens control shown in (a) and changing the control coefficient depending on the correction lens average positions LRY0 and LRP0 in the yawing direction and the pitching direction calculated by the method described above. The correction lens control is performed so as not to be affected by these effects as much as possible, and more accurate shake correction is performed.

The embodiment will be described below. Corrected lens average position LR0 = (LRY0, LR
P0) is calculated. Obtained correction lens average position LR
0 = (LRY0, LRP0) is used, and shake correction control is performed using the control block diagram shown in FIG. FIG.
Is the open control term V from the control block diagram of FIG.
The calculation method of oY is changed to a form depending on the correction lens average position LRY0 in the yawing direction, and a new gain coefficient g4, which is a control coefficient depending on the correction lens average position LRY0 in the yawing direction, is added to the feedback control term. .

First, the open control term V in the yawing direction
oY is calculated by the equation 42 in which the equation 24 is changed and the parameter of the correction lens average position LRY0 in the yawing direction is added.

[0141]

VoY = g0 × (LCY-LRY0) In order to explain this expression 42 by giving a concrete example, the weight of the movable member of the correction lens 2 and the correction lens average in the yawing direction due to the deviation of the elastic force. The position LRY0 is deviated by −0.2 [mm] from the center of the movable range of the correction lens 2 in the yawing direction, as shown by the dotted line in FIG. 7, and the correction lens average position LRY0 = −0.2 [mm] in the yawing direction. Consider the calculated case. At this time, when it is attempted to control the correction lens to the center position of the movable range (the position corresponding to the correction lens target position LCY = 0), the open control term VoY calculated by Equation 24 is zero, and only this term is used. If the control is performed, the correction lens position does not move from the position of -0.2 [mm]. If feedback control is performed in such a state, the amount of feedback increases correspondingly, and the control error increases. On the other hand, the open control term VoY calculated by the equation 42 is +0.2 [V], and in a steady state after a sufficient time has elapsed, the correction lens 2 is located near the target position, and the feedback amount is naturally small. The control error becomes small. By using the equation 42 in this way, it is possible to minimize the influence of the weight itself or the bias of the correction lens position due to the bias of the elastic force.

Next, the meaning of adding a new control coefficient called gain coefficient g4 to the feedback control term will be described. The feedback control term VfY is calculated by the equation 43 by adding the control coefficient g4 depending on the correction lens average position LRY0 in the yawing direction to the equation 30.

[0143]

[Expression 43] VfY = g4 × (VdY + VpiY) Here, g4 is calculated by a function depending on the positive lens average position LRY0 in the yawing direction of Expression 44. For example, as an example thereof, the movement in the yawing direction is expressed by Expression 45. It is calculated as a function depending on the absolute value of the deviation ratio of the range 2 mm and LRY0.

[0144]

[Expression 44] g4 = f (LRY0)

[0145]

G4 = kg4 × (1+ | LRY0 / 2.0 mm |) Note that kg4 is a positive positive number, for example, kg4 = 1.0. These numbers 43, 44, and 45 represent the correction lens 2
If the deviation of is large, increase the feedback amount,
The purpose is to improve the controllability. Also,
To obtain the same effect, the control coefficients g1, g2, and g3 in the control block of FIG. 30 (a) are varied depending on LRY0 without using the equations 43, 44, and 45. It doesn't matter. The control block diagram shown in FIG. 30A is a special example of the control block diagram in FIG. 49. If the positional deviation of the correction lens as described above can be ignored, the correction lens mechanism shown in FIG. If it is a system, LRY0 =
The correction lens control may be performed using the control block diagram of FIG. 49 with 0 and g4 = 1.0. The calculation timing of these numbers 44 to 45 will be described later.

Next, using the flow chart of FIG.
A specific embodiment for calculating the yawing direction correction lens drive amount VoutY based on the control block diagram of FIG. 49 will be described. The process shown in FIG. 50 is another embodiment of the process for calculating the yawing direction correction lens drive amount VoutY shown in FIG. 31, and is the process performed in step S403 in FIG. The process starts from step S620 and uses step 42 to calculate the open control term VoY depending on the correction lens average position LRY0, which means the positional deviation of the correction lens 2 in the yawing direction. Next, in step S622, the correction lens position error ΔLY is calculated using the equation 25. Step S62
When the processing of step 2 is completed, the position error proportional term V is calculated in step S623.
pY is calculated using Equation 26. Next, step S624.
The position error differential term VdY is calculated using equation 27.
Note that the expression ΔLY ′ is ΔLY at the time of the previous sampling, and the equation 27 corresponds to the part of the differential value of ΔLY in FIG. 49 multiplied by the proportional coefficient g3, and the differential of ΔL is ΔLY. Is approximately calculated by the change amount ΔLY−ΔLY ′ from the previous sampling. Further, ΔLY ′ is to hold ΔLY at the time of the previous sampling, and ΔLY ′ at the time of the first sampling is set to a predetermined value, for example, 0 so that this value does not become unstable at the time of the first sampling. Next, in step S625, the position error integral term ViY is calculated using equation 28. Equation 28 is approximately calculated by integrating the integral part of FIG. 49, and the initial value of ViY at the time of initial sampling is set to a predetermined value, for example, 0. Further, VpiY is calculated in the next step S626, and here, the value at the time of the previous sampling is held and that value is used. Since VpiY at the time of the first sampling is indefinite, a predetermined value, for example, 0 is calculated at the time of the first sampling. Next, in step S626, the position error proportional-position error integral term VpiY is calculated using the equation 29. next,
In step S627, VdY and VpiY calculated in steps S624 and S626, and g4 which is obtained depending on the yawing direction correction lens average position LRY0, which means the positional deviation of the correction lens 2 in the yawing direction, are calculated by Equation 43. , The feedback control term VfY is calculated.
Next, in step S628, step S621 and step S
VoY and VfY calculated in 627 are used to calculate the final yawing direction correction lens drive amount VoutY by equation 31, and in step S629 the correction lens drive amount VoutY is calculated.
The calculation process ends, and the process proceeds to step S404 in FIG.
Note that each term VoY, VpY, ViY, VpiY, VdY, Vf used in the description of the process of the flowchart of FIG.
Y and the like are the same as the terms used in the control block diagram of FIG.

The switching between the open control and the closed control of the correction lens drive control according to the countermeasure against the electrical noise of the correction lens position detection mechanisms 5Y and 5P at the time of exposure is as follows.
Even if the yawing direction correction lens control is changed from the process shown in the flowchart of FIG. 31 to the flowchart shown in FIG. 50, the same control can be performed. That is, in the process of changing to the open control or the closed control in the exposure control shown in FIGS. 34, 35, 36 and 37, the control coefficients g1, g2 and g3 are changed to 0 or a normal value. Can be similarly processed.

Next, an embodiment of at what timing the various adjustments, the shake correction control, the camera tilt detection, and the like described above are performed will be described. The MPU 1 controls cameras other than the shake correction like the conventional camera having no shake correction function, and performs a series of operations related to the shake correction. 51, 52, 53, 54 and FIG.
Will be explained using.

First, when a user inserts a battery (not shown) into the camera, the battery supplies power to the entire electric circuit of the camera. FIG. 51 is a flowchart describing the processing that the MPU 1 first performs when the user inserts the battery into the camera. The control process at the time of charging the battery in FIG. 51 starts from step S1 and the light emission amount adjustment of the correction lens position detection unit in the yawing direction is performed in step S2 by using, for example, the flowcharts shown in FIGS. Adjustment is performed in step S3 to adjust the light emission amount of the correction lens position detector in the pitching direction by a method similar to the flowcharts shown in FIGS. 14 and 15, and in step S4, the correction lens position detector in the yawing direction is adjusted. The gamma and shift adjustments are adjusted using, for example, the flowcharts shown in FIGS.
Then, the gamma and shift adjustments of the correction lens position detector in the pitching direction are adjusted by, for example, a method similar to the flowchart shown in FIG. 26, and acceptance of the main switch MSW is permitted in step S6. By the process of step S6, the main switch MSW shown in FIG.
Control at the time of turning on and control at the time of turning off the main switch MSW shown in FIG. 53 are permitted. When the process of step S6 is completed, the control process when the battery is turned on is completed in step S7.

Next, when the user turns on the main switch MSW of the camera, the MPU 1 performs the following processing. FIG. 52 is a flowchart showing the processing performed by the MPU 1 when the main switch MSW of the camera is turned on by the user. Main switch M of FIG. 52
The control process when the SW is turned on starts from step S10, and in step S10, the light emission amount adjustment of the correction lens position detection unit in the yawing direction is adjusted using, for example, the flowcharts shown in FIGS. Step S12
In this case, the light emission amount adjustment of the correction lens position detection unit in the pitching direction is adjusted by a method similar to the flowcharts shown in FIGS. 14 and 15, and the gamma and shift adjustments of the correction lens position detection unit in the yawing direction are performed in step S13. For example, adjustment is performed using the flowchart shown in FIG. 26, and in step S14, the gamma and shift adjustments of the correction lens position detector in the pitching direction are adjusted in the same manner as the flowchart shown in FIG. 26, for example, and in step S15. Step S15 for permitting acceptance of the half-press switch SW1
By this process, the control process when the half-press switch SW1 is turned on, which will be described later with reference to FIG. 54, 55 or 56, is permitted. When the process of step S15 ends, step S15
At 16, the control process when the main SW is turned on is completed.

Next, when the user turns off the main switch MSW of the camera, the MPU 1 carries out the following processing. FIG. 53 is a flowchart describing the processing performed by the MPU 1 when the main switch MSW of the camera is turned off by the user. The control process when the main switch MSW is off in FIG. 52 starts from step S20, and at step S21, the half-press switch SW.
Prohibit acceptance of 1. By the process of step S21,
The control process when the half-press switch SW1 is turned on, which will be described later with reference to FIG. 54, 55 or 56, is prohibited. When the process of step S21 ends, the control process when the main switch MSW is turned off ends in step S22.

As described above, according to the present embodiment, while the main switch MSW is on, the processes of the control when the main switch MSW is on in FIG. 52 and the control when the main switch MSW is off in FIG. 53 are performed. Is shown in FIG.
Half-press switch SW specified by 4, 55 or 56
The photographing operation performed by the control at the time of 1 ON is permitted, and the photographing operation is prohibited while the main switch MSW is off.

Next, when the user turns on the half-push switch SW of the camera while the main switch MSW is on, the MPU 1 performs the following processing. 54 and 55 are flowcharts describing the processing performed by the MPU 1 when the user presses the half-push switch SW1 of the camera while the main switch MSW is on. The control processing when the half-press switch SW1 is turned on in FIGS. 54 and 55 starts from step S30, and the light emission amount adjustment of the correction lens position detection unit in the yawing direction in step S31 is shown in FIGS. Adjustment is performed using the flowchart shown in FIG. 14, and the light emission amount of the correction lens position detector in the pitching direction is adjusted in step S32 by the same method as the flowcharts shown in FIGS. 14 and 15, and the yawing direction is corrected in step S33. The gamma and shift adjustments of the lens position detection unit are performed by, for example, FIG.
Adjust using the flowchart shown in step S
In 34, the gamma of the correction lens position detector in the pitching direction,
The shift adjustment is adjusted by, for example, a method similar to the flowchart shown in FIG. 26, and in step S35, the shake detection mechanism 4Y in the yawing direction and the shake detection mechanism 4P in the pitching direction are operated to start the detection of shake. Next, in step S36, the correction lens position integration process shown in FIG. 43 and the pitching direction correction lens position integration process realized by the same method are permitted, and the integration of the shake correction lens position is started. When the process of step S36 is completed, the photometric mechanism 22 is operated in step S37 to obtain photometric values of a plurality of regions within the photographing field angle. Next, in step S38, the distance measuring mechanism 21 is operated to obtain the distance measuring values of a plurality of areas within the photographing field angle. Next, in step S39, it is determined whether or not the release switch SW2, which is turned on by the user's full-press operation of the release button, is turned on. If it is on, the process proceeds to step S41, and if it is off, the user's release button SW2 is turned on in step S40. It is determined whether the half-push switch SW1 which is turned on by a half-push operation is still on. Half-press switch SW1 in step S40
If is still on, the process returns to step S39, and if already off, the process proceeds to step S47, and the control process when the half-push switch SW1 is on is completed. If it is determined in step S39 that the release switch SW2 is on, the correction lens position integration process shown in FIG. 43 is terminated in step S41, and the integrated value of the yaw direction correction lens position at that time, the integration count, and The correction lens average position LR0 = (LRY0, LRP0) is calculated from the integrated value of the pitching direction correction lens position and the number of times of integration by the above method. Next, in step S42, from the corrected lens average position LR0 = (LRY0, LRP0) calculated in step S41, the camera attitude and inclination θg indicating the inclination and | θh are calculated by the above-described method.
| Is calculated, and in step S43, θg from the plurality of distance measurement values obtained in step S38 using the above-described method, and
The final distance measurement is calculated depending on | θh |, and the focusing amount is determined by a known method. Although not shown in the drawings, since it is not related to the present invention, for example, in an autofocus camera, based on the focusing amount obtained here, the entire photographing lens or a part of the photographing lens is moved in the optical axis direction, and the film surface is moved. Focusing operation for adjusting the focus at may be performed. When the process of step S43 ends, in step S44, one photometric value is calculated from the plurality of photometric values obtained in step S37 using the above-described method by θ.
It is determined depending on g and | θh |, and the shutter speed at which an appropriate exposure amount can be obtained and the aperture value of the taking lens are calculated by a known method. When the process of step S44 is completed, the control coefficient g4 in the correction lens control is calculated by using the above-described formulas 44 to 45 in step S45, or other control factors are calculated as the above-mentioned correction lens average position LR.
0 = (LRY0, LRP0), and in step S46, the exposure control process shown in FIG. 34, 35, or FIG. 36, 37, or FIG. 39 is performed.
28, 29, 31, or 50, the shake correction control during exposure is performed. When the process of step S46 is completed, the process of the control when the halfway switch SW1 is turned on is completed in step S47.

Next, while the main switch MSW is on, the user presses the half-press switch SW1 of the camera.
Half-push switch SW performed by MPU1 when is turned on
Another embodiment of the control when the switch is on will be described. FIG.
54 is a flowchart showing only the part related to the present invention in the processing performed by the MPU 1 when the user presses the half-push switch SW1 of the camera while the main switch MSW is on. 9 shows another embodiment of control when the switch SW1 is turned on. The correction lens average position calculation processing, the multipoint distance measurement value using the calculated value, the one distance measurement value from the multidivision distance measurement values, the processing for calculating the photometric value, and the shake correction control Since the processing such as parameter change is shown in FIG. 54, it is omitted here.

The control processing when the half-push switch SW1 of FIG. 55 is turned on starts from step S50, and in step S51, the shake detection mechanism 4 in the yawing direction is detected.
The shake detection mechanism 4P in the Y and pitching directions is operated to start detection of shake. Next, in step S52, the photometric mechanism 2
2 is operated to obtain subject brightness information. In this case, the photometric mechanism 22 need not be a multi-division type photometric mechanism. Next, in step S53, the distance measuring mechanism 21 is operated to obtain the distance measurement value information of the subject. The distance measuring mechanism 21 in this case may not be a multi-point type distance measuring mechanism. Next, in step S54, it is determined whether or not the release switch SW2, which is turned on by the user's full-press operation of the release button, is turned on. If it is on, the process proceeds to step S56, and if it is off, the step S55.
Then, it is determined whether the half-push switch SW1 which is turned on by the half-push operation of the release button by the user is still on. If the half-push switch SW1 is still turned on in step S55, the process proceeds to step S54, and if it is already off, the process proceeds to step S61 to end the control process when the half-push switch SW1 is turned on. If it is determined in step S54 that the release switch SW2 is ON, then in step S56, the light emission amount adjustment of the correction lens position detection unit is adjusted using the flowcharts shown in FIGS. 14 and 15, and in step S57. Then, the light emission amount adjustment of the correction lens position detection unit in the pitching direction is adjusted by a method similar to the flowcharts shown in FIGS. 14 and 15, and the gamma and shift adjustments of the correction lens position detection unit in the yawing direction are performed in step S58. 26, and in step S59, the gamma and shift adjustments of the correction lens position detector in the pitching direction are adjusted by the same method as the flowchart shown in FIG. 26, for example. Next, in step S60, as shown in FIGS.
5, or the exposure control process shown in FIGS. 36, 37, or 39 is performed, and FIGS.
Shake correction control during exposure is performed by the process defined in FIG. When the process of step S60 is completed, step S
At 61, the control process when the half-push switch SW1 is turned on ends.

As described above, the user turns on the battery, the user turns on the main switch MSW, or the user presses the release button for shooting to turn on the half-press switch SW1 or release. Correction lens position detection mechanisms 5Y, 5Y, 5Y in the yawing direction and the pitching direction at a timing corresponding to the operation of the user or the operation of the camera immediately before the release switch SW2 is turned on by fully pressing the button, or immediately before the exposure.
Since the camera itself adjusts the light emission amount of the light emitting portion of P, the calculation of the output error Vd1 value and the Vd2 value, and the gamma and shift adjustments, the correction lens position is detected without the adjustment device when the camera is shipped. It is possible to secure the dynamic range of the outputs of the mechanisms 5Y and 5P, secure a sufficient correction lens position detection accuracy, and perform the shake correction control with a sufficient accuracy.

Since these adjustments are made at the timing of turning on the half-press switch SW1 immediately before photographing, if the time from the half-depression of the release button to the full-depression is not so long, the change in the light emission amount due to the temperature change, Output error Vd1
The correction lens position detection can be performed with accuracy that is not affected by the change in the value, the Vd2 value, the gamma, and the change in the shift adjustment value, and accurate shake correction control can be performed. Furthermore, as shown in FIG. 56, when these adjustments are made at the timing when the full-press switch SW2 is turned on or immediately before the exposure control, the shake correction control is performed at the timing immediately after making these adjustments. Since it is possible to take pictures, the amount of light emission changes due to temperature changes, the output error Vd1 value, Vd2 value change, gamma,
The correction lens position can be detected more accurately without being influenced by the change in the shift adjustment value, and more accurate shake correction control can be performed.

Further, the correction lens position detecting mechanisms 5Y, 5P
Of the current-voltage conversion unit, and an addition / subtraction calculation unit, and
By implementing the division unit by a program inside the MPU 1, the circuit configuration of the correction lens position detection mechanisms 5Y and 5P can be simplified, and the cost of the entire camera can be reduced. Further, conventionally, in the shake correction control using the elastically supported correction lens 2, a correction lens target position for appropriately performing shake correction is calculated from shake information output from the shake detection circuit, and this correction is performed. Although the servo circuit mainly using analog hardware was used to control from the lens target position and the actual shake correction lens position, in the present invention, these shake correction controls are digitized and MP
Since it is realized using a one-chip computer such as U1, each control parameter used for shake correction control can be changed very easily, and for example, the transfer characteristics of the controlled object due to the design change of the correction lens mechanism or the like. It is possible to swiftly respond to changes in temperature, etc., and it is superior in that it is not affected by variations in various control gains and frequency characteristics, temperature fluctuations, or changes over time, which is a problem when configured with analog circuits. Correction control becomes possible. It should be noted that the one-chip computer such as the MPU1 used in the present embodiment for performing these controls requires a certain high-speed computing property, which may lead to an increase in the cost of the camera. Prices are going down
In the very near future, it is conjectured that the overall cost of the camera will be reduced.

Further, in order to suppress the influence of electrical noise on the shutter control at the time of exposure and the position detection of the correction lens 2 due to the strobe light emission, at the time of strobe light emission and at the timing of shutter control, the shake by open control is performed. By performing the correction control, shake correction is performed without using the correction lens position information resulting in electrical noise, and the total shake correction accuracy is improved.

Further, the support structure characteristic of the correction lens 2,
Specifically, an adverse effect due to the characteristic that the correction lens 2 is elastically supported, for example, an adverse effect on the shake correction control caused by the effect of gravity on the correction lens 2 or the effect of deviation of the elastic force, The average position of the correction lens is detected and returned to the control of the correction lens 2 to wipe it off, thereby enabling accurate shake correction control. Also, by taking advantage of this adverse effect, the camera attitude is calculated from the above-mentioned corrected lens average position without adding a special costly circuit such as a vertical / horizontal position sensor, and multipoint measurement is performed using the calculated camera attitude. By changing the calculation algorithm of the distance value or the multi-divided photometry value, more accurate distance measurement and photometry can be performed.

[Brief description of drawings]

FIG. 1 is an overall block diagram of a camera including an image blur correction mechanism according to the present embodiment.

FIG. 2 is a schematic diagram showing a configuration of 5Y, 5P, 7Y and 7P in FIG.

FIG. 3 is a schematic diagram showing a configuration of a correction lens position detection unit 5Y.

4A and 4B are diagrams showing current relationships in the correction lens driving circuit of FIG. 3 in both FIGS.

FIG. 5 shows a circuit diagram of a correction lens driving mechanism 7Y.

FIG. 6A shows the relationship between VoutY and the voltage applied to the coil 11Y. (b) shows the relationship in the modification.

FIG. 7 is a diagram showing a relationship between a voltage applied to a coil 11Y and a correction lens position.

FIG. 8A and FIG. 8B are circuit diagrams of a light emitting unit of the correction lens position detection mechanism. (b) shows a modified example.

9 is a diagram showing input / output characteristics of a light emitting unit of the correction lens position detection mechanism of FIG.

FIG. 10 is a circuit diagram of a detection unit of the correction lens position detection circuit according to the present embodiment.

FIG. 11 is an operation explanatory diagram of a circuit of a detection unit of the correction lens position detection circuit according to the present embodiment.

FIG. 12 is a circuit diagram of a shake detection circuit according to the present embodiment.

FIG. 13 is a timing chart of adjustment of the light emitting unit of the correction lens position detection circuit according to the present embodiment.

FIG. 14 is a flowchart of adjustment of the light emitting unit of the correction lens position detection circuit according to the present embodiment.

FIG. 15 is a flowchart of adjustment of the light emitting unit of the correction lens position detection circuit according to the present embodiment.

FIG. 16 is an operation explanatory diagram of adjustment of the light emitting unit of the correction lens position detection circuit according to the present embodiment.

FIG. 17 is an operation explanatory diagram of adjustment of the light emitting unit of the correction lens position detection circuit according to the present embodiment.

FIG. 18 is an operation explanatory diagram of adjustment of the light emitting unit of the correction lens position detection circuit according to the present embodiment.

FIG. 19 is an operation explanatory diagram of adjustment of the light emitting unit of the correction lens position detection circuit according to the present embodiment.

FIG. 20 is an operation explanatory diagram of the adjustment of the light emitting unit of the correction lens position detection circuit according to the present embodiment.

FIG. 21 is an operation explanatory diagram of the adjustment of the light emitting unit of the correction lens position detection circuit according to the present embodiment.

FIG. 22 is an operation explanatory diagram of adjustment of the light emitting unit of the correction lens position detection circuit according to the present embodiment.

FIG. 23 is an operation explanatory diagram of the adjustment of the light emitting unit of the correction lens position detection circuit according to the present embodiment.

FIG. 24 is an operation explanatory diagram of adjustment of the detection unit of the correction lens position detection circuit according to the present embodiment.

FIG. 25 is a timing chart of adjustment of the detection unit of the correction lens position detection circuit according to the present embodiment.

FIG. 26 is a flowchart of adjustment of the detection unit of the correction lens position detection circuit according to the present embodiment.

FIG. 27 is a flowchart of shake correction control according to the present embodiment.

FIG. 28 is a flow chart diagram of correction lens target position calculation according to the present embodiment.

FIG. 29 is a flowchart of correction lens position calculation according to the present embodiment.

FIG. 30 is a block diagram of correction lens control according to the present embodiment.

FIG. 31 is a flowchart of correction lens drive amount calculation according to the present embodiment.

FIG. 32 is a timing chart of shake correction control during exposure according to the present embodiment.

FIG. 33 is a circuit diagram of a shutter drive circuit according to the present embodiment.

FIG. 34 is a flowchart of shake correction control during exposure according to the present embodiment.

FIG. 35 is a flowchart of shake correction control during exposure according to the present embodiment.

FIG. 36 is a flowchart of shake correction control during exposure according to the present embodiment.

FIG. 37 is a flowchart of shake correction control during exposure according to the present embodiment.

FIG. 38 is a timing chart of shake correction control during exposure according to the present embodiment.

FIG. 39 is a flowchart of shake correction control during exposure according to the present embodiment.

FIG. 40: FIG. 7 is a timing chart diagram for calculating a correction lens average position according to the present embodiment.

FIG. 41 is an explanatory diagram of a relationship between a correction lens average position and a camera tilt according to the present embodiment.

FIG. 42 is an explanatory diagram of the relationship between the correction lens average position and the camera tilt according to the present embodiment.

FIG. 43 is a flowchart of a correction lens position integration process according to this embodiment.

FIG. 44 is a diagram showing a photographing field angle and a distance measuring area of the distance measuring circuit according to the present embodiment.

FIG. 45 is a diagram showing a photographing field angle and a photometric area of the photometric circuit according to the present embodiment.

FIG. 46 is a diagram showing weights of a camera tilt, a distance measurement value, and a photometry value according to the present embodiment.

FIG. 47 is a diagram showing weights of the tilt of the camera, the distance measurement value, and the photometric value according to the present embodiment.

[Fig. 48] Fig. 48 is a diagram showing weights of a camera tilt, a distance measurement value, and a photometry value according to the present embodiment.

FIG. 49 is a block diagram of correction lens control according to the present embodiment.

FIG. 50 is a flowchart of correction lens drive amount calculation according to the present embodiment.

FIG. 51 is a flow chart diagram of control at the time of battery insertion according to the present embodiment.

FIG. 52 is a flowchart of control when the main switch according to the present embodiment is turned on.

FIG. 53 is a flowchart of control when the main switch is off according to the present embodiment.

FIG. 54 is a flowchart of control when the halfway press switch is turned on according to the present embodiment.

FIG. 55 is a flowchart of control when the halfway press switch is turned on according to the present embodiment.

FIG. 56 is a configuration diagram of a correction lens mechanism according to the present embodiment.

FIG. 57 is a configuration diagram of a correction lens mechanism according to a conventional example.

FIG. 58 is a configuration diagram of a correction lens mechanism according to a conventional example.

FIG. 59 is a circuit diagram of a detection unit of a correction lens position detection circuit according to a conventional example.

[Explanation of symbols]

1 MPU 2 Correction lens 2a Correction lens holding member 3 Shutter 4Y Yaw direction shake detection mechanism 4P Pitching direction shake detection mechanism 5Y Yaw direction correction lens position detection mechanism 5P Pitching direction correction lens position detection mechanism 6 Shutter drive circuit 7Y Yaw direction correction lens drive Mechanism 7P Pitching direction correction lens drive mechanism 8 Main switch 9 Half-press switch 10 Release switch 11Y coil 12Y magnet 13Y yoke 14Y Yoke 15Y, 16Y spring 17Y Slit member

Claims (7)

[Claims] 1. A shake correction optical system for moving a predetermined movable range so as to correct an image shake caused by shake of an image pickup apparatus, and a shake correction optical system displacement detection for optically detecting a displacement of the shake correction optical system. And a position for calculating an adjustment value for calculating the position of the shake correction optical system by the output of the shake correction optical system displacement detection means at one end and the other end of the predetermined movable range at a predetermined timing. Detection automatic adjustment means, at least a shake correction optical system position calculation means for calculating position information of the shake correction optical system from the output of the shake correction optical system displacement detection means and the adjustment value by the position detection automatic adjustment means, Image blur correction device characterized by having 2. The image blur correction device according to claim 1, wherein the predetermined timing is a timing associated with a user operation. 3. The image blur correction apparatus according to claim 1, wherein the predetermined timing is a timing corresponding to an operation of inserting a battery into the image blur correction apparatus. 4. The image blur correction device according to claim 1, wherein the predetermined timing is a timing corresponding to a change in a state of a main switch. 5. The image blur correction device according to claim 1, wherein the predetermined timing is a timing corresponding to half-pressing of a release button. 6. The image blur correction device according to claim 1, wherein the predetermined timing is a timing corresponding to a full depression of a release button. 7. The image blur correction device according to claim 1, wherein the predetermined timing is a timing immediately before exposure.