JP4720430B2 - Vibration detection device, optical apparatus, camera system, and camera - Google Patents

Description

The present invention relates to a shake detection device that detects vibration, an optical apparatus, a camera system, and a camera that incorporate the shake detection device.

  For optical devices such as digital cameras, camera body vibrations (hereinafter referred to as camera shake) that the photographer does not intend during normal shooting and vibrations that are intentionally given to the camera body by the photographer due to composition changes or panning, etc. There may be a built-in shake detection device that detects (hereinafter, composition change). This type of shake detection apparatus includes a correction optical system provided to correct image blur generated on the imaging surface of the image sensor due to vibration of the camera body, and a drive unit that drives the correction optical system. For example, the drive unit drives the correction optical system to correct image blur that occurs on the imaging surface only when vibration of the camera body is detected as camera shake.

In a situation where the photographer is on a vehicle, the shake detection device may detect vibration generated in the camera body due to the shake of the vehicle as a composition change. In this case, image blur that occurs on the imaging surface is not corrected. As a method for avoiding this, there is a method in which a changeover switch that can select either the first mode in which image blur is corrected or the second mode in which image blur is not corrected is selected according to the situation of the photographer. It is disclosed (for example, Patent Document 1). In this method, when the photographer is on the vehicle, the first mode is selected by operating the changeover switch, so that the image blur can be corrected by the correction optical system.
JP 2003-215562 A

However, as described above, when selecting whether or not to correct the image blur by the operation of the switch by the photographer, the photographer takes time to operate the switch. For this reason, there was a problem that it was not possible to concentrate on shooting.
An object of the present invention is to provide a shake detection device, an optical apparatus, a camera system, and a camera that can automatically select whether or not to correct an image blur according to a shooting situation.

In the shake detection device according to the first aspect, the vibration detection unit detects the vibration of the device main body and outputs a vibration signal indicating the vibration. The state determination unit determines the state of the apparatus main body based on the frequency characteristics of the vibration signal and the variance value of the vibration signal. The state determination unit determines that the movement of the device is not intended by the operator when the variance value is less than a predetermined reference value and the frequency of the vibration signal is higher than the predetermined reference value, and the variance value is determined in advance. When the vibration signal is equal to or higher than a predetermined reference value and the frequency of the vibration signal is smaller than a predetermined reference, it is determined that the device is intended to be moved by the operator.

In 請 Motomeko second camera includes a shake detection device according to claim 1, and an imaging unit that captures an optical image incident.

In the camera according to claim 3, preparation start switch to start the imaging preparation of the optical image, it is turned on by the operator. The measurement unit measures a predetermined time after the preparation start switch is turned off. The state determination unit determines the state of the apparatus main body during a period from when the preparation start switch is turned on until the measurement by the measurement unit is completed.
In claim 4 of the camera, preparation start switch to start the imaging preparation of the optical image, it is turned on by the operator. The measurement unit measures a predetermined time from turning on the preparation start switch. The state determination unit determines the state of the apparatus main body during measurement by the measurement unit.

The optical apparatus of claim 5, comprising a vibration detecting device according to claim 1, provided in the incident optical path of the optical image, and a correction optical system for correcting a blur of an optical image caused by the vibration.
The correction optical system corrects the blurring of the optical image when the state determination unit determines that the apparatus is not intended to be moved.
A camera system according to a sixth aspect includes the optical device according to the fifth aspect and an imaging unit that captures an optical image incident through the correction optical system.
In the camera system according to the seventh aspect , the preparation start switch is turned on by the operator in order to start preparation for capturing an optical image. The measurement unit measures a predetermined time after the preparation start switch is turned off. The state determination unit determines the state of the apparatus main body for a period from when the preparation start switch is turned on until the measurement by the measurement unit ends, and holds the already determined state after measurement by the measurement unit.
In the camera system according to the eighth aspect , the preparation start switch is turned on by the operator in order to start preparation for capturing an optical image. The measurement unit measures a predetermined time from turning on the preparation start switch. The state determination unit determines the state of the apparatus main body during measurement by the measurement unit, and holds the already determined state after measurement by the measurement unit.
In the optical apparatus according to the ninth aspect, the optical apparatus can be attached to a camera body including an imaging unit that captures an optical image incident through the correction optical system.

  Since it is possible to automatically select whether or not to correct image blur, it is possible to concentrate on the operation of the apparatus main body.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows a first embodiment of a shake detection device, an optical apparatus, a camera system, and a camera according to the present invention. The optical apparatus 100 is formed as, for example, a single-lens reflex digital camera system, and includes a camera body 102 (apparatus body) and a lens barrel 104 that is detachably attached to the camera body 102.

  The camera body 102 includes a half-push switch SW1 (preparation start switch), a full-push switch SW2, a half-push timer 10, a power supply unit 12, a CCD (Charge Coupled Device) 18 (imaging unit), a RAM 24, and a ROM 25. . The lens barrel 104 includes angular velocity sensors 14a and 14b (vibration detection units), amplification units 16a and 16b, a shake correction lens 20 (correction optical system), drive units 22a and 22b, and a microcomputer 26 (hereinafter referred to as a microcomputer 26). is doing. In FIG. 1, the shutter mechanism and the mirror mechanism are not shown.

The half-press switch SW1 is turned on in conjunction with a half-press of a shutter switch (not shown). When the half-push switch SW1 is turned on, photometry calculation by a photometry unit (not shown), autofocus drive by an imaging optical system built in the lens barrel 104, and the like are started.
The full press switch SW2 is turned on in conjunction with the full press of the shutter switch. When the full push switch SW2 is turned on, the shutter mechanism, the mirror mechanism, the CCD 18 and the like are driven, and a subject image is captured.

  The half-press timer 10 includes counters C1 and C2. The half-press timer 10 is controlled by the microcomputer 26 and is turned on simultaneously with turning on the half-press switch SW1. The counter C1 (measurement unit) measures a time T1 that has elapsed since the half-press switch SW1 is turned off as an integer value. The counter C2 measures the time T2 that has elapsed since the half-press timer 10 is turned on as an integer value.

The power supply unit 12 supplies power to the angular velocity sensors 14a and 14b while the half-press timer 10 is on, and stops supplying power to the angular velocity sensors 14a and 14b while the half-press timer 10 is off.
The angular velocity sensors 14a and 14b are sensors that detect vibration applied to the optical device 100 as an angular velocity using, for example, Coriolis force, and output an angular velocity signal ω indicating the detected angular velocity to the amplification units 16a and 16b. The angular velocity sensor 14a detects vibration applied to the optical device 100 in the X-axis direction in the figure as an angular velocity, and outputs an angular velocity signal ω _x (vibration signal) to the amplifying unit 16a.

Similar to the angular velocity sensor 14a, the angular velocity sensor 14b detects vibration applied to the optical device 100 in the Y-axis direction in the figure as an angular velocity, and outputs an angular velocity signal ω _y (vibration signal) to the amplification unit 16b. Thus, by arranging the angular velocity sensors 14a and 14b in different axial directions, vibration of the optical device 100 can be detected in two dimensions. The angular velocity sensors 14a and 14b can detect the angular velocity only while power is supplied from the power supply unit 12.

The amplifying unit 16a amplifies the angular velocity signal ω _x received from the angular velocity sensor 14a, and outputs the amplified angular velocity signal ω _x to the microcomputer 26. Amplifying section 16b, like the amplifier portion 16a, and amplifies the angular velocity signal omega _y received from the angular velocity sensor 14b, and outputs an angular velocity signal omega _y amplified to the microcomputer 26. Note that the amplifying units 16a and 16b may include a low-pass filter that reduces high-frequency noise included in the angular velocity signals ω _x and ω _y .

The CCD 18 is disposed at a position facing the blur correction lens 20 via a shutter (not shown). The CCD 18 is driven by a CCD driver (not shown) and captures a subject image (optical image) formed by the imaging optical system of the lens barrel 104.
The blur correction lens 20 is a part of an imaging optical system built in the lens barrel 104, and includes a single lens or a plurality of lenses. The blur correction lens 20 is driven by the driving units 22a and 22b, and in order to correct image blur generated on the imaging surface of the CCD 18 due to vibration of the optical device 100, a direction orthogonal to the optical axis I (optical path) (X in the figure). Axis or Y axis direction).

The drive units 22a and 22b are actuators (not shown) for moving the shake correction lens 20 in the X-axis or Y-axis direction, and sensors that detect the current position θ of the shake correction lens 20 in the X-axis or Y-axis direction. (Not shown).
Driver 22a detects the current position theta _x on the X axis of the blur correction lens 20, and outputs the detected current position theta _x in A / D converter circuit 34a. The drive unit 22a moves the shake correction lens 20 in the X-axis direction based on a drive signal DS _x (described later) received from the D / A conversion circuit 38a.

Driver 22b detects the current position theta _y on the Y-axis of the blur correction lens 20, and outputs the detected current position theta _y to the A / D converter circuit 34b. Drive unit 22b, on the basis of the driving signal DS _y received from the D / A converter 38b (described later) to move the shake correction lens 20 in the Y-axis direction. The RAM 24 temporarily stores image data captured by the CCD 18.

The ROM 25 is composed of, for example, an EEPROM or a flash memory that can electrically rewrite data, and retains data even when the optical apparatus 100 is powered off. The ROM 25 stores a program executed by the microcomputer 26 and the like.
The microcomputer 26 includes A / D conversion circuits 28a and 28b, shake waveform analysis units 30a and 30b, composition change detection units 32a and 32b, A / D conversion circuits 34a and 34b, drive signal calculation units 36a and 36b, and D / A conversion. Circuits 38a and 38b are included.

The A / D conversion circuit 28a performs A / D conversion on the angular velocity signal ω _x received from the amplification unit 16a, and outputs the A / D converted angular velocity signal ω _x to the shake waveform analysis unit 30a and the drive signal calculation unit 36a. Similar to the A / D conversion circuit 28a, the A / D conversion circuit 28b performs A / D conversion on the angular velocity signal ω _y received from the amplification unit 16b, and the shake waveform analysis unit 30b converts the A / D converted angular velocity signal ω _y. And it outputs to the drive signal calculating part 36b.

In the present embodiment, the A / D conversion circuits 28a and 28b are built in the microcomputer 26. However, the present invention is not limited to this example, and an A / D conversion circuit separate from the microcomputer 26 may be used. In the present embodiment, two A / D conversion circuits A / D conversion circuits 28a and 28b are provided in association with the amplification units 16a and 16b. You may make it distribute D conversion operation | movement temporally. For example, those after the angular velocity signals omega _x converted A / D, the angular velocity signal omega _y converted A / D, and repeats the angular velocity signal omega _x, the angular velocity signal omega _y, the angular velocity signal omega _x · · · and the A / D converter But you can. The same applies to the A / D conversion circuits 34a and 34b.

Fluctuation waveform analyzing section 30a, on the basis of the angular velocity signal omega _x received from the A / D conversion circuit 28a, the vibration state of the optical device 100, it is determined as either a stable state and an unstable state, composition change determination results It outputs to the detection part 32a. In the present invention, the stable state refers to a state in which the optical device 100 is stably supported, for example, a state in which the optical device 100 is used in a stable place on the scaffold by a photographer. In the present invention, the unstable state refers to a state in which the optical device 100 is supported in an unstable manner, for example, a state in which a scaffold used by the photographer in the vehicle for the optical device 100 is unstable.

Fluctuation waveform analysis portion 30b, like the vibration waveform analyzer 30a, on the basis of the angular velocity signal omega _y received from the A / D conversion circuit 28b, to determine the vibrational state of the optical apparatus 100, composition change detecting unit determination results To 32b.
When the vibration state is determined as the stable state, the composition change detection unit 32a uses the vibration of the optical device 100 when the photographer does not change the composition or performs panning (not intended by the photographer) (hereinafter, not intended by the photographer). , Still), and vibration (intended by the photographer) (hereinafter, composition change) when the photographer performs composition change, panning, or the like, and the determination result is a drive signal calculation unit 36a. Output to.

Similar to the composition change detection unit 32a, the composition change detection unit 32b determines the vibration of the optical device 100 as either stationary or composition change when the vibration state is determined as the stable state, and determines the determination result as a drive signal. It outputs to the calculating part 36b.
A / D conversion circuit 34a outputs the current position theta _x received from the drive unit 22a and A / D conversion, the current position theta _x obtained by A / D conversion of the drive signal computation unit 36a. A / D conversion circuit 34b outputs the current position theta _y received from the driving unit 22b A / D conversion, the current position theta _y A / D converted to a drive signal computation unit 36b.

Based on the angular velocity signal ω _x received from the A / D conversion circuit 28a, the determination result of the composition change detection unit 32a, and the current position θ _x received from the A / D conversion circuit 34a, the drive signal calculation unit 36a the lens 20 calculates the drive signal DS _x for driving the X-axis direction, and outputs the calculated drive signal DS _x in D / a converter circuit 38a.
Based on the angular velocity signal ω _y received from the A / D conversion circuit 28b, the determination result of the composition change detection unit 30b, and the current position θ _y received from the A / D conversion circuit 34b, the drive signal calculation unit 36b A drive signal DS _y for driving the lens 20 in the Y-axis direction is calculated, and the calculated drive signal DS _y is output to the D / A conversion circuit 38b.

In the present embodiment, the two drive signal calculation units 36a and 36b are provided. However, the calculation operation may be distributed temporally by using one drive signal calculation unit. For example, after calculating the driving signal DS _x, calculates the driving signal DS _y, then, the drive signal DS _x, drive signal DS _y, may be one repetition of operation and the driving signal DS _x · · ·.
D / A converter circuit 38a is a drive signal DS _x received from the drive signal computation unit 36a to D / A conversion, and outputs a driving signal DS _x obtained by D / A conversion to the drive unit 22a. D / A conversion circuit 38b is a drive signal DS _y received from the drive signal calculating section 36b to D / A conversion, and outputs a driving signal DS _y obtained by D / A conversion to the drive unit 22b.

In this embodiment, the D / A conversion circuits 38a and 38b are built in the microcomputer 26. However, the present invention is not limited to this example, and a D / A conversion circuit separate from the microcomputer 26 may be used. In this embodiment, two D / A conversion circuits, D / A conversion circuits 38a and 38b, are provided. However, the D / A conversion operation is distributed in terms of time by using one D / A conversion circuit. It may be. For example, after the drive signal DS _x is D / A converted, the drive signal DS _y is D / A converted, and then the drive signal DS _x , the drive signal DS _y , the drive signal DS _x. The conversion may be repeated.

FIG. 2 shows the internal configuration of the shake waveform analyzer 30 (30a, 30b) and the drive signal calculator 36 (36a, 36b) of FIG.
Since the contents thereafter are common to both the X-axis and Y-axis directions, the drive units 22a and 22b, the A / D conversion circuits 28a and 28b, the shake waveform analysis units 30a and 30b, and the composition change analysis units 32a and 32b. , A / D conversion circuits 34a and 34b, drive signal calculation units 36a and 36b, and D / A conversion circuits 38a and 38b, respectively, drive unit 22, A / D conversion circuit 28, shake waveform analysis unit 30, and composition change analysis unit 32, A / D conversion circuit 34, drive signal calculation unit 36, and D / A conversion circuit 38.

The shake waveform analysis unit 30 includes a dispersion value calculation unit 40, a frequency detection unit 42, and a state determination unit 44.
The variance value calculation unit 40 calculates the reference value ω _a (t) of the angular velocity signal ω (t) using the angular velocity signal ω (t) received from the A / D conversion circuit 28. The variance value calculation unit 40 calculates the reference value ω _a (t) using the following arithmetic expression (1). In equation (1), ω (i) is an angular velocity signal at time i, K ₀ is a constant, and t is time (integer value).

Further, the variance value calculation unit 40 calculates the variance value v (t) of the angular velocity signal ω (t) using the reference value ω _a (t) and the angular velocity signal ω (t), and calculates the variance value v ( t) is output to the composition change detection unit 32 and the state determination unit 44. The variance value calculation unit 40 calculates the variance value v (t) using the following arithmetic expression (2). In equation (2), ω (i) is an angular velocity signal at time i, ω _a (i) is an average value of angular velocity signals, K ₁ is a constant, and t is time (integer value).

周波数検出部４２は、Ａ／Ｄ変換回路２８から受け取った角速度信号ω（ｔ）の周波数ｆを検出し、検出した周波数ｆを構図変更検出部３２及び状態判定部４４に出力する。なお、周波数判定部４２による周波数ｆの検出方法の詳細は、図３で説明する。

The frequency detection unit 42 detects the frequency f of the angular velocity signal ω (t) received from the A / D conversion circuit 28 and outputs the detected frequency f to the composition change detection unit 32 and the state determination unit 44. Details of the method of detecting the frequency f by the frequency determination unit 42 will be described with reference to FIG.

The state determination unit 44 determines the vibration state of the optical device 100 based on the dispersion value v (t) and the frequency f, and outputs the determination result to the composition change detection unit 32 and the signal selection unit 50.
As described in FIG. 1, the composition change detection unit 32 determines the vibration of the optical device 100 based on the dispersion value v (t) and the frequency f when the vibration state of the optical device 100 is determined as a stable state. Then, the determination result is output to the reference value calculation unit 46 and the signal selection unit 50. Details of the vibration state determination method by the state determination unit 44 and the vibration determination method by the composition change detection unit 32 will be described with reference to FIG.

The drive signal calculation unit 36 includes a reference value calculation unit 46, a subtracter 48, a signal selection unit 50, an integration calculation unit 52, and a drive signal calculation unit 54.
The reference value calculation unit 46 calculates a reference value ω ₀ (t) of the angular velocity signal ω based on the determination result of the composition change detection unit 32 and the angular velocity signal ω (t) received from the A / D conversion circuit 28. The calculated reference value ω ₀ (t) is output to the subtractor 48.

When it is determined that the vibration of the optical device 100 is stationary, the reference value calculation unit 46 calculates the reference value ω ₀ (t) for the stationary state using the following calculation formula (3). When the vibration of the optical apparatus 100 is determined as a composition change, the reference value calculation unit 46 calculates a reference value ω ₀ (t) for composition change using the following calculation expression (4). In equations (3) and (4), ω (i) is an angular velocity signal at time i, t is time (integer value), and K ₂ and K ₃ are constants (where K ₂ > K ₃ ). The reference value ω ₀ may be calculated using a FIR (Finite impulse response) filter, an IIR (Infinite impulse response) filter, a low-pass filter, or the like.

減算器４８は、Ａ／Ｄ変換回路２８及び基準値演算部４６から角速度信号ω（ｔ）及び基準値ω₀（ｔ）をそれぞれ受け取り、角速度信号ω（ｔ）から基準値ω₀（ｔ）を減算する。減算器４８は、減算結果である角速度信号ω'（ｔ）（＝ω（ｔ）−ω₀（ｔ））を信号選択部５０に出力する。

The subtractor 48 receives the angular velocity signal ω (t) and the reference value ω ₀ (t) from the A / D conversion circuit 28 and the reference value calculator 46, respectively, and receives the reference value ω ₀ (t) from the angular velocity signal ω (t). Is subtracted. The subtractor 48 outputs an angular velocity signal ω ′ (t) (= ω (t) −ω ₀ (t)), which is a subtraction result, to the signal selection unit 50.

When the vibration of the optical device 100 is determined to be stationary, or when the vibration state of the optical device 100 is determined to be unstable, the signal selection unit 50 moves the blur correction lens 20 to the target position θ ′. In order to correct the image blur described in 1, the angular velocity signal ω ′ (t) (= ω (t) −ω ₀ (t)) is output to the integral calculation unit 52.
When the signal selection unit 50 determines that the composition is changed, that is, when the vibration of the optical device 100 is determined as the vibration intended by the photographer, the angular velocity signal ω ′ (t ) (= 0) is output to the integral calculation unit 52.

The integral calculation unit 52 integrates the angular velocity signal ω ′ (t) (= ω (t) −ω ₀ (t) or 0) and converts it into an angle. The integral calculation unit 52 calculates the target position θ ′ (t) of the blur correction lens 20 using the converted angle, and outputs the calculated target position θ ′ (t) to the drive signal calculation unit 54.
The integral calculation unit 52 calculates the target position θ ′ (t) using the following calculation formula (5). In equation (5), θ ′ (t) is the target position of the blur correction lens 20 at time t, θ (t−1) is the target position of the blur correction lens 20 calculated at time t−1, and ω ′ (t ) Is the angular velocity signal received from the signal selection unit 50 at time t, t is the time (integer value), and C is a constant determined by conditions such as the focal length of the imaging optical system built in the lens barrel 104. is there.

積分演算部５２は、角速度信号ω’（ｔ）＝０のとき、すなわち、光学機器１００の振動が撮影者の意図する振動として判定されたとき、目標位置θ’（ｔ−１）に等しい目標位置θ’（ｔ）を駆動信号算出部５４に出力する。

When the angular velocity signal ω ′ (t) = 0, that is, when the vibration of the optical device 100 is determined as the vibration intended by the photographer, the integral calculation unit 52 sets the target equal to the target position θ ′ (t−1). The position θ ′ (t) is output to the drive signal calculation unit 54.

The drive signal calculation unit 54 uses the target position θ ′ (t) received from the integration calculation unit 52 and the current position θ (t) received from the A / D conversion circuit 34 to drive the shake correction lens 20. Is calculated.
The drive signal calculation unit 54 calculates a deviation D of the target position θ ′ (t) with respect to the current position θ (t). For example, the drive signal DS is calculated by PID (Proportional Integral Derivative) control that adds a term proportional to the deviation, a term proportional to the integral of the deviation, and a term proportional to the derivative of the deviation. The drive signal DS is not limited to PID control, and may be calculated using another method.

Further, the drive signal calculation unit 54 calculates the drive signal DS based on the deviation D in order to correct the image blur described in FIG. 1 by matching the current position θ (t) with the target position θ ′ (t). Then, the drive signal DS is output to the drive unit 22 via the D / A conversion circuit 38.
In this example, the current position θ (t) is equal to the target position θ ′ (t−1) calculated by the integral calculation unit 52 at time t−1. Therefore, when the integration calculation unit 52 outputs the target position θ ′ (t) equal to the target position θ ′ (t−1), that is, when the vibration of the optical device 100 is determined as the vibration intended by the photographer, the driving is performed. The deviation D calculated by the signal calculation unit 54 is zero. At this time, the drive unit 22 does not need to correct the image blur described in FIG.

  Thus, by providing the composition change unit 32 and the state determination unit 44, the vibration (stationary or composition change) and the vibration state (stable state and unstable state) of the optical device 100 are automatically determined. That is, it is automatically determined whether or not to correct the image blur by moving the blur correction lens 20 according to the use situation of the optical device 100 by the photographer. Therefore, it is possible to correct the image blur by the blur correction lens 20 without instructing whether or not to correct the image blur by operating the switch or the like by the photographer.

  FIG. 3 shows the waveform of the angular velocity signal ω output from the angular velocity sensors 14a and 14b. The vertical and horizontal axes in the figure indicate the amplitude A of the angular velocity signal ω and the time t, respectively. Waveforms 1 and 2 in the figure show the waveforms of the angular velocity signal ω1 output at the time of stillness determination and the angular velocity signal ω2 output at the time of composition change determination, respectively. The waveform 3 in the figure shows the waveform of the angular velocity signal ω3 that is output when the unstable state is determined. In this example, the waveform of the angular velocity signals ω1 and ω3 is shown as a sine wave for ease of explanation.

  In the period from time t1 to time t2 (for example, 1 second), the frequency detection unit 42 uses the number N1 of extreme values of the angular velocity signal ω1 and the extreme value of the angular velocity signal ω2 as the frequency characteristics of the angular velocity signals ω1, ω2, and ω3. N2 and the number N3 of extreme values of the angular velocity signal ω3 are counted. The frequency detection unit 42 detects N1 / 2, N2 / 2, and N3 / 2 as a result of dividing the numbers N1, N2, and N3 by 2 as the frequencies f1, f2, and f3 of the angular velocity signals ω1, ω2, and ω3, respectively.

The state determination unit 44 and the composition change detection unit 32 compare the frequency f (f1, f2, f3) with the reference frequency fb to determine the vibration state and vibration of the optical device 100, respectively. In the present invention, the reference frequency fb indicates a predetermined frequency for determining the frequency f (f1, f2, f3).
The state determination unit 44 and the composition change detection unit 32 include a filter that passes a frequency component equal to or lower than the reference frequency fb included in the angular velocity signal ω or a frequency component exceeding the reference frequency fb as the frequency characteristic of the angular velocity signal ω. The vibration state and vibration of the optical device 100 may be determined based on the presence or absence of the frequency component that has passed through the filter. Further, the frequency characteristic of the dispersion value of the angular velocity signal ω may be used.

  FIG. 4 shows a waveform of the variance value v output from the variance value calculation unit 40. The vertical axis and the horizontal axis in the figure indicate the variance value v and time t, respectively. Waveforms 1, 2, and 3 in the figure show waveforms of dispersion values v1, v2, and v3 corresponding to the angular velocity signals ω1, ω2, and ω3 shown in FIG. 3, respectively. Note that the reference dispersion value vb in the figure indicates a dispersion value determined in advance to determine the dispersion values v1, v2, and v3.

The state determination unit 44 determines the vibration state of the optical device 100 as a stable state when the dispersion value v is less than the reference dispersion value vb or when the frequency f described in FIG. When the dispersion value v is greater than or equal to the reference dispersion value and the frequency f exceeds the reference frequency fb, the vibration state of the optical device 100 is determined as an unstable state.
When the vibration state is determined as the stable state, the composition change detection unit 32 composes the vibration of the optical device 100 when the dispersion value v is equal to or greater than the reference dispersion value vb and the frequency f is equal to or less than the reference frequency fb. It is determined as a change, and when the dispersion value v is less than the reference dispersion value vb and the frequency f exceeds the reference frequency fb, the vibration of the optical device 100 is determined to be stationary. Note that the composition change is detected by detecting the start and end of the composition change and determining that the composition change has been performed from the start to the end.

As described above, the state determination unit 44 and the composition change detection unit 32 can determine the vibration state and vibration of the optical device 100 only by comparing the dispersion value v and the frequency f with the reference dispersion value vb and the reference frequency fb, respectively. For this reason, the calculation procedure required for the determination of the vibration state and vibration can be simplified. As a result, the vibration state and vibration determination time by the microcomputer 26 can be shortened.
5 to 7 show the image blur correction operation in the first embodiment. The operations shown in FIGS. 5 to 7 are realized by the microcomputer 26 executing a program stored in the ROM 25.

First, in step S100, the microcomputer 26 detects whether or not the half-press switch SW1 is on. If it is detected that the half-press switch SW1 is turned on, the process proceeds to step S102. When it is detected that the half-press switch SW1 is turned off, the process proceeds to step S128 in FIG.
In step S102, the microcomputer 26 sets the measurement time T1 of the counter C1 to zero. Thereafter, the process proceeds to step S104.

In step S104, the microcomputer 26 detects whether or not the half-press timer 10 is off. When it is detected that the half-press timer 10 is off, the process proceeds to step S106. When it is detected that the half-press timer 10 is turned on, the process proceeds to step S134 in FIG. 6 in order to determine the vibration state of the optical device 100.
In step S106, the microcomputer 26 sets the measurement time T2 of the counter C2 to zero. Thereafter, the process proceeds to step S108.

In step S108, the microcomputer 26 sets the vibration and vibration state of the optical device 100 to a stationary state and a stable state, respectively. Thereafter, the process proceeds to step S110.
In step S110, the microcomputer 26 turns on the half-press timer 10. Thereafter, the process proceeds to step S112.
In step S112, the microcomputer 26 causes the angular velocity sensors 14a and 14b to start detecting vibrations. Thereafter, the process proceeds to step S114.

In step S114, the microcomputer 26 calculates the stationary reference value ω ₀ using the calculation formula (3) as described in FIG. Thereafter, the process proceeds to step S116.
In step S116, the microcomputer 26 calculates the target position θ ′ by substituting the angular velocity signal ω ′ (= ω−ω ₀ ) into the calculation formula (5) as described in FIG. Thereafter, the process proceeds to step S118.

In step S118, the microcomputer 26 calculates the drive signal DS for the shake correction lens 20 using the target position θ ′ and the current position θ as described in FIG. Thereafter, the process proceeds to step S120.
In step S120, the microcomputer 26 controls the drive unit 22 based on the drive signal DS to move the shake correction lens 20 in the X-axis or Y-axis direction in order to correct image blur that has occurred on the imaging surface. . Thereafter, the process proceeds to step S122.

  In step S122, the microcomputer 26 detects whether or not the full push switch SW2 is on. If it is detected that the full-press switch SW2 is turned on, that is, that the shutter switch is fully pressed by the photographer, the process proceeds to step S124. If it is detected that the full-press switch SW2 is turned off, that is, that the shutter switch is not fully pressed by the photographer, the process proceeds to step S126.

In step S124, the microcomputer 26 drives the shutter, the CCD 18, etc., and images the subject. Thereafter, the process proceeds to step S126.
In step S126, as described in FIG. 1, the microcomputer 26 adds 1 to the measurement time T2 of the counter C2 in order to measure the time elapsed since the half-press timer 10 is turned on as an integer value. Thereafter, the process proceeds to step S100.

On the other hand, when it is detected in step S100 that the half-press switch SW1 is off, in step S128, the microcomputer 26 detects whether or not the half-press timer 10 is on. When it is detected that the half-press timer 10 is on, the process proceeds to step S130. When it is detected that the half-press timer 10 is off, the process proceeds to step S100 in FIG.
In step S130, as described in FIG. 1, the microcomputer 26 adds 1 to the measurement time T1 of the counter C1 in order to measure the time elapsed since the half-press switch SW1 is turned off as an integer value. Thereafter, the process proceeds to step S132.

  In step S132, the microcomputer 26 detects whether or not the measurement time T1 is equal to or less than the reference time RT1. In the present invention, the reference time RT1 indicates the maximum time that can be measured by the counter C1. When it is detected that the measurement time T1 is equal to or less than the reference time RT1, the process proceeds to step S134 in order to determine the vibration state of the optical device 100. On the other hand, when it is detected that the measurement time T1 exceeds the reference time RT1, the process proceeds to step S156 to end the determination of the vibration state of the optical device 100.

In step S134, the microcomputer 26 calculates the average value ω _a using the arithmetic expression (1) described in FIG. 2 in order to calculate the variance value v. Thereafter, the process proceeds to step S136.
In step S136, the microcomputer 26 calculates the variance value v using the arithmetic expression (2) described in FIG. Thereafter, the process proceeds to step S138.

In step S138, as described in FIG. 3, the microcomputer 26 counts the number N of extreme values of the angular velocity signal ω in the period from time t1 to time t2, and sets N / 2 as the frequency f of the angular velocity signal ω. To detect. Thereafter, the process proceeds to step S140 in FIG.
In step S140, as described in FIG. 4, the microcomputer 26 compares the dispersion value v and the frequency f with the reference dispersion value vb and the reference frequency fb, respectively, and determines the vibration state of the optical device 100. When the vibration state is determined as the stable state, the process proceeds to step S142. If it is determined that the vibration state is an unstable state, the process proceeds to step S144 in order to calculate the stationary reference value ω ₀ .

In step S142, the microcomputer 26 determines the vibration of the optical device 100 by comparing the dispersion value v and the frequency f with the reference dispersion value vb and the reference frequency fb, respectively, as described in FIG. If the vibration is determined to be stationary, the process proceeds to step S144 in order to calculate the stationary reference value ω ₀ . When the vibration is determined as the composition change, the process proceeds to step S148 in order to calculate the reference value ω ₀ for composition change.

If it is determined in step S140 as an unstable state, or if it is determined as stationary in step S142, in step S144, the microcomputer 26 uses the arithmetic expression (3) described in FIG. ω ₀ is calculated. Thereafter, the process proceeds to step S146.
In step S146, the microcomputer 26 calculates the target position θ ′ by substituting the angular velocity signal ω ′ (= ω−ω ₀ ) into the calculation formula (5) as described in FIG. Thereafter, the process proceeds to step S152.

On the other hand, if it is determined in step S142 that the composition has been changed, in step S148, the microcomputer 26 calculates the reference value ω ₀ for changing the composition using the arithmetic expression (4) described in FIG. Thereafter, the process proceeds to step S150.
In step S150, the microcomputer 26 calculates the target position θ ′ by substituting the angular velocity signal ω ′ (= 0) into the calculation formula (5) as described in FIG. Thereafter, the process proceeds to step S152.

After the target position θ ′ is calculated in step S146 or step S150, in step S152, the microcomputer 26 uses the target position θ ′ and the current position θ as described in FIG. Drive signal DS is calculated. Thereafter, the process proceeds to step S154.
In step S154, the microcomputer 26 controls the drive unit 22 based on the drive signal DS to move the blur correction lens 20 in the X-axis or Y-axis direction in order to correct image blur that has occurred on the imaging surface. . Thereafter, the process proceeds to step S122 in FIG.

On the other hand, when it is detected in step S132 of FIG. 6 that the reference time RT1 has been exceeded, in step S156, the microcomputer 26 controls the angular velocity sensors 14a and 14b to end the detection of the angular velocity signal ω. Thereafter, the process proceeds to step S158.
In step S158, the microcomputer 26 turns off the half-press timer 10. Then, the image blur correction operation in the first embodiment is completed.

  As described above, in the first embodiment, whether or not image blur correction is necessary is automatically determined without instructing whether or not image blur correction is performed by an operation of a changeover switch or the like by a photographer. Image blur correction by 20 is performed. For this reason, the photographer can save time and effort to operate the changeover switch and the like, and can concentrate on photographing. As a result, it is possible to provide the optical device 100 that is convenient for the photographer.

Since a changeover switch or the like for instructing the presence / absence of image blur correction is unnecessary, the number of manufacturing steps and the number of parts for manufacturing the optical device 100 can be reduced, and the manufacturing cost of the optical device 100 can be reduced.
8 to 10 show the image blur correction operation in the second embodiment of the shake detection device, the optical apparatus, the camera system, and the camera . Detailed description of the same elements as those described in the first embodiment is omitted. In this embodiment, since the microcomputer 26 executes, the program stored in the ROM 25 is different from the first embodiment of the shake detection device, the optical device, the camera system, and the camera . Other configurations are the same as those of the first embodiment (FIGS. 1 and 2).

FIGS. 8 to 10 show that when it is detected in step S132 of the first embodiment (FIGS. 5 to 7) that the measurement time T1 is equal to or less than the reference time RT1, Except that step S202 is executed, it is the same as FIGS.
Detailed description of the same processing as in FIGS. The operations shown in FIGS. 8 to 10 are realized by the microcomputer 26 executing a program stored in the ROM 25. After step S100 in FIG. 8 to step S132 in FIG. 9 are executed, the process proceeds to step S200.

  In step S200, the microcomputer 26 detects whether or not the measurement time T2 of the counter C2, that is, the time T2 that has elapsed since the half-press timer 10 is turned on, is equal to or less than the reference time RT2. In the present invention, the reference time RT2 indicates the maximum time that can be measured by the counter C2. When it is detected that the measurement time T2 is equal to or less than the reference time RT2, the process proceeds to step S134 in order to determine the vibration state of the optical device 100. If it is detected that the measurement time T2 exceeds the reference time RT2, the process proceeds to step S202 in order to end the determination of the vibration state. Thus, the vibration state of the optical device 100 is determined only during the period from when the half-press timer 10 is turned on until the reference time RT2 elapses.

In step S202, the microcomputer 26 maintains the already determined vibration state (stable state or unstable state) of the optical device 100. Thereafter, Steps S140 to S158 are executed, and the image blur correction operation in the second embodiment is completed.
As described above, in the second embodiment, the same effect as that of the first embodiment can be obtained. Furthermore, the vibration state determination period can be limited to a period (for example, several seconds to several tens of seconds) from when the half-press timer 10 is turned on until the reference time RT2 elapses. For this reason, compared with the case where a vibration state is always determined, the frequency with which a vibration state is erroneously determined can be reduced, and malfunction of the optical apparatus 100 can be prevented.

  Thus, the vibration state of the optical device 100 is determined only during a period (for example, several seconds to several tens of seconds) from when the half-push switch SW1 is turned on until the reference time RT2 elapses. In general, when the vibration state is always determined, the waveform of the angular velocity signal ω (FIG. 3) output from the angular velocity sensors 14a and 14b due to an impact such as a gust of wind or an earthquake suddenly applied to the optical device 100 from the outside. Since it changes abruptly, the frequency that the stable state is erroneously determined as the unstable state or the unstable state as the stable state increases. In the present invention, the determination period of the vibration state can be limited to a period (for example, several seconds to several tens of seconds) from when the half-press switch SW1 is turned on until the reference time RT2 elapses. For this reason, the frequency with which the vibration state is erroneously determined can be reduced, and the malfunction of the optical device 100 can be prevented. For example, it is possible to prevent the blur correction lens 20 from being stopped by the drive units 22a and 22b as a result of erroneously determining the unstable state as the stable state.

FIG. 11 shows a third embodiment of the shake detection apparatus, optical apparatus, camera system, and camera of the present invention. The same elements as those described in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted. In this embodiment, a program stored in the ROM 25 to be executed by the microcomputer 26 is different from the first embodiment. The camera main body 302 has a half-press timer 56 instead of the half-press timer 10 of the first embodiment. Other configurations are the same as those of the first embodiment (FIGS. 1 and 2).

The optical apparatus 300 is formed as, for example, a single-lens reflex digital camera system, and includes a camera main body 302 (apparatus main body) and a lens barrel 104 that is detachably attached to the camera main body 302.
The camera body 302 includes a half-push switch SW1 (preparation start switch), a full-push switch SW2, a half-push timer 56, a power supply unit 12, a CCD 18 (imaging unit), a RAM 24, and a ROM 25.

  The half-press timer 56 includes counters C1, C2, and C3. The half-press timer 56 is controlled by the microcomputer 26 and is turned on at the same time as the half-press switch SW1 is turned on. The counter C1 measures the time T1 that has elapsed since the half-press switch SW1 is turned off as an integer value. The counter C2 measures the time T2 that has elapsed since the half-press timer 56 is turned on as an integer value. The counter C3 (measurement unit) measures the time T3 that has elapsed since the half-press switch SW1 is turned on as an integer value.

  12 to 14 show the image blur correction operation in the third embodiment. 12 to 14 show that steps S300 to S312 are executed after the measurement time T1 is set to 0 in step S102 of the first embodiment (FIGS. 5 to 7), and steps S126 and S128 are steps. Except for the point replaced with S314 and S316, respectively, and when step S132 detects that the measurement time T1 is less than or equal to the reference time RT1, step S134 or step S322 is executed after step S320 is executed. These are the same as in FIGS.

Detailed description of the same processing as in FIGS. The operation shown in FIGS. 12 to 14 is realized by the microcomputer 26 executing a program stored in the ROM 25.
First, in step S100, the microcomputer 26 detects whether or not the half-press switch SW1 is on. When it is detected that the half-press switch SW1 is turned on, the process proceeds to step S300 after setting the measurement time of the counter C1 to 0 in step S102. On the other hand, when it is detected that the half-press switch SW1 is turned off, the process proceeds to step S316 in FIG.

  In step S300, the microcomputer 26 determines whether or not the half-press switch SW1 is detected to be turned on when the previous step S300 is executed. If it is detected that the half-press switch SW1 has been turned on last time, that is, if the shutter switch is continuously depressed halfway by the photographer, the process proceeds to step S302. On the other hand, when the previous half-press switch SW1 is detected to be off, the process proceeds to step S304.

In step S302, as described in FIG. 11, the microcomputer 26 adds 1 to the measurement time T3 of the counter C3 in order to measure the time elapsed since the half-press switch SW1 is turned on as an integer value. Thereafter, the process proceeds to step S306.
In step S304, the microcomputer 26 sets the measurement time T3 of the counter C3 to zero. Thereafter, the process proceeds to step S306.

In step S306, the microcomputer 26 detects whether or not the half-press timer 56 is off. When it is detected that the half-press timer 56 is off, the process proceeds to step S308. On the other hand, when it is detected that the half-press timer 56 is turned on, the process proceeds to step S320 in FIG.
In step S308, the microcomputer 26 sets the measurement time T2 of the counter C2 to zero. Thereafter, the process proceeds to step S310.

In step S310, the microcomputer 26 sets the vibration and vibration state of the optical device 300 to a stationary state and a stable state, respectively. Thereafter, the process proceeds to step S312.
In step S312, the microcomputer 26 turns on the half-press timer 56. Thereafter, steps S112 to S124 are executed, and the process proceeds to step S314.
In step S314, as described in FIG. 11, the microcomputer 26 adds 1 to the measurement time T2 of the counter C2 in order to measure the time elapsed since the half-press timer 56 is turned on as an integer value. Thereafter, the process proceeds to step S100.

  On the other hand, if it is detected in step S100 that the half-press switch SW1 is off, in step S316, the microcomputer 26 detects whether or not the half-press timer 56 is on. When it is detected that the half-press timer 56 is turned on, 1 is added to the measurement time T1 of the counter C1 in step S130, and then the process proceeds to step S132. When it is detected that the half-press timer 10 is off, the process proceeds to step S100 in FIG.

  In step S132, the microcomputer 26 detects whether or not the measurement time T1 is equal to or less than the reference time RT1 described in FIG. If it is detected that the measurement time T1 is equal to or less than the reference time RT1, the process proceeds to step S320. When it is detected that the measurement time T1 exceeds the reference time RT1, the angular velocity sensors 14a and 14b terminate detection of the angular velocity signal ω in step S156, and then the process proceeds to step S318.

In step S318, the microcomputer 26 turns off the half-press timer 56. Then, the image blur correction operation in the third embodiment is completed.
On the other hand, if it is detected in step S132 that the measurement time T1 is less than or equal to the reference time RT1, in step S320, the microcomputer 26 determines whether or not the measurement time T3 is less than or equal to the reference time RT3 described in FIG. To detect. In the present invention, the reference time RT3 indicates the maximum time that can be measured by the counter C3. When it is detected that the measurement time T3 is equal to or less than the reference time RT3, the process proceeds to step S134 in order to determine the vibration state of the optical device 300. When it is detected that the measurement time T3 exceeds the reference time RT3, the process proceeds to step S322 to end the determination of the vibration state. As described above, the vibration state of the optical device 300 is determined every time the half-press switch SW1 is turned on, that is, every time the photographer presses the shutter switch halfway.

In step S322, the microcomputer 26 holds the already determined vibration state (stable state or unstable state) of the optical device 300. Thereafter, Steps S140 to S318 are executed, and the image blur correction operation in the third embodiment is completed.
As described above, in the third embodiment, the same effect as in the first embodiment can be obtained. Further, the vibration state of the optical device 300 is determined every time the photographer presses the shutter switch halfway. For this reason, even if the vibration state is erroneously determined, the vibration state can be re-determined with a simple operation by pressing the shutter switch halfway. As a result, it is possible to provide the optical device 300 that is convenient for the photographer.

In the first to third embodiments described above, examples in which the present invention is applied to a digital camera system have been described. The present invention is not limited to such an embodiment. The present invention may be applied to a binocular, a telescope, and a mobile phone having a camera function.
In the first to third embodiments described above, an example in which a single-lens reflex type camera system capable of attaching the lens barrel 104 to the camera body 102 and the camera body 302 is used as the optical device 100 and the optical device 300 has been described. . The present invention is not limited to such an embodiment. A compact type camera in which a lens barrel is integrated may be used.

  In the first to third embodiments described above, examples in which a digital camera is used as the camera body 102 and the camera body 302 have been described. The present invention is not limited to such an embodiment. As the camera body 102 and the camera body 302, a silver salt film type camera may be used. It can also be used for field scopes and binoculars for observing wild birds.

In the first to third embodiments described above, the example in which the subject is imaged using the CCD 18 has been described. The present invention is not limited to such an embodiment. The subject may be imaged using an image sensor other than the CCD, for example, a CMOS image sensor or other amplification type solid-state image sensor.
In the first to third embodiments described above, the example in which the vibration applied to the optical device 100 and the optical device 300 is detected by the angular velocity sensors 14a and 14b has been described. The present invention is not limited to such an embodiment. A vibration applied to the optical device 100 and the optical device 300 may be detected by an acceleration sensor.

In the first to third embodiments described above, the example in which the RAM 24 and the ROM 25 are mounted on the camera body 102 and the camera body 302 has been described. The present invention is not limited to such an embodiment. The lens barrel 104 may be mounted with the RAM 24 and the ROM 25.
As mentioned above, although this invention was demonstrated in detail, said embodiment and its modification are only examples of this invention, and this invention is not limited to this. Obviously, modifications can be made without departing from the scope of the present invention.

The present invention is applied to a shake detection device that detects vibration, an optical device, a camera system, and a camera incorporating the shake detection device.

1 is a block diagram illustrating a shake detection device, an optical apparatus, a camera system, and a camera according to a first embodiment. FIG. 2 is a block diagram illustrating an internal configuration of a shake waveform analysis unit and a drive signal calculation unit illustrated in FIG. 1. It is a wave form diagram of an angular velocity signal outputted from an angular velocity sensor. It is a wave form diagram of the dispersion value output from a dispersion value calculation part. 3 is a flowchart illustrating an image blur correction operation according to the first embodiment. 3 is a flowchart illustrating an image blur correction operation according to the first embodiment. 3 is a flowchart illustrating an image blur correction operation according to the first embodiment. It is a flowchart which shows the image blurring correction | amendment operation | movement in 2nd Embodiment of a shake detection apparatus, an optical apparatus, a camera system, and a camera . It is a flowchart which shows the image blurring correction | amendment operation | movement in 2nd Embodiment. It is a flowchart which shows the image blurring correction | amendment operation | movement in 2nd Embodiment. It is a block diagram which shows 3rd Embodiment of a shake detection apparatus, an optical apparatus, a camera system, and a camera . 12 is a flowchart illustrating an image blur correction operation according to the third embodiment. 12 is a flowchart illustrating an image blur correction operation according to the third embodiment. 12 is a flowchart illustrating an image blur correction operation according to the third embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10, 56 ... Half-press timer, 12 ... Power supply part, 14, 14a, 14b ... Angular velocity sensor, 16, 16a, 16b ... Amplification part, 18 ... CCD, 20 ... Shake correction lens, 22, 22a, 22b ... Drive part 24 ... RAM, 25 ... ROM, 26 ... microcomputer, 28, 28a, 28b, 34, 34a, 34b ... A / D conversion circuit, 30, 30a, 30b ... vibration waveform analysis unit, 32, 32a, 32b ... composition Change detection unit, 36, 36a, 36b ... drive signal calculation unit, 38, 38a, 38b ... D / A conversion circuit, 40 ... dispersion value calculation unit, 42 ... frequency detection unit, 44 ... state determination unit, 46 ... reference value Arithmetic unit, 48 ... subtractor, 50 ... signal selection unit, 52 ... integral calculation unit, 54 ... drive signal calculation unit, 100, 300 ... optical device, 102, 302 ... camera body, 104 ... lens barrel The

Claims (9)

A vibration detection unit that detects vibration of the apparatus body and outputs a vibration signal indicating the vibration;
A state determination unit that determines the state of the apparatus main body based on the frequency characteristics of the vibration signal and the variance value of the vibration signal ;
The state determination unit determines that the movement of the device is not intended by the operator when the variance value is less than a predetermined reference value and the frequency of the vibration signal is higher than a predetermined reference; The shake detection is characterized in that when the variance value is equal to or greater than a predetermined reference value and the frequency of the vibration signal is smaller than a predetermined reference, it is determined that the movement of the device is intended by the operator. apparatus. The shake detection device according to claim 1 ;
A camera comprising: an imaging unit that captures an incident optical image. The camera according to claim 2, wherein
A preparation start switch that is turned on by the operator in order to start preparation of the optical image;
A measurement unit that measures a predetermined time from the turn-off of the preparation start switch,
The camera according to claim 1 , wherein the state determination unit determines the state of the apparatus main body during a period from when the preparation start switch is turned on until the measurement by the measurement unit ends . The camera according to claim 2 , wherein
A preparation start switch that is turned on by the operator in order to start preparation of the optical image;
A measurement unit that measures a predetermined time from turning on the preparation start switch,
The said state determination part determines the state of the said apparatus main body during the measurement by the said measurement part, The camera characterized by the above-mentioned . The shake detection device according to claim 1 ;
A correction optical system that is provided on an incident optical path of the optical image and corrects blurring of the optical image caused by the vibration;
The correction optical system corrects a blur of the optical image when the state determination unit determines that the apparatus is not intended to be moved by the state determination unit. An optical instrument according to claim 5 ;
A camera system comprising: an imaging unit that captures an optical image incident via the correction optical system. The camera system according to claim 6 .
A preparation start switch that is turned on by the operator in order to start preparation of the optical image ;
A measurement unit that measures a predetermined time from the turn-off of the preparation start switch,
The state determination unit determines the state of the apparatus main body during a period from when the preparation start switch is turned on until the measurement by the measurement unit ends, and holds the already determined state after measurement by the measurement unit. A featured camera system . The camera system according to claim 6 .
A preparation start switch that is turned on by the operator in order to start preparation of the optical image;
A measurement unit that measures a predetermined time from turning on the preparation start switch,
The state determination unit determines a state of the apparatus main body during measurement by the measurement unit, and holds the already determined state after measurement by the measurement unit . The optical apparatus according to claim 5 .
An optical apparatus that can be attached to a camera body that includes an image pickup unit that picks up an optical image incident through the correction optical system.

Images