JPH0798473A - Camera shake amount detecting device for camera - Google Patents

Abstract

PURPOSE:To provide a camera shake amount detecting device for a camera capable of detecting a correct camera shake amount regardless of the position of the face. CONSTITUTION:As for this camera shake amount detecting device for the camera; reflected light obtained by reflecting light projected from a light projecting means 32 to an object to be detected is received by 1st and 2nd light receiving means 33 and 34 arranged by interposing the means 32 between them, and the camera shake amount is detected based on reflected light information from the 1st and the 2nd light receiving means 33 and 34. In this device, the light receiving angle of the 1st and the 2nd light receiving means 33 and 34 is set larger than the light projecting angle of the light projecting means 32.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera shake detection device.

[0002]

2. Description of the Related Art Conventionally, various types of shake detection devices used in cameras and the like have been proposed. For example, in Japanese Patent Application No. 4-149674 filed by the applicant of the present invention, it is arranged on the back surface of a camera, projects light toward a photographer, and receives reflected light from at least two points by a light receiving element. And a calculation means for calculating the difference between the reciprocals of the square roots of the photocurrents output from the light receiving elements, and the output of the calculation means is a camera shake signal. There is disclosed a camera shake amount detection device for a camera. The structure and operation of the technique disclosed in Japanese Patent Application No. 4-149674 will be described below.

A method of detecting the amount of camera shake of the camera will be described with reference to FIG. 8. A tilt sensor 2 is arranged on the rear surface of the camera 1, and the photographer is separated from the rear surface of the camera 1 by a predetermined distance. It is assumed that there is a face 3. Assuming that the start of shooting is as shown in FIG. 8A and the face 3 is hardly moved during shooting, the position of the camera 1 when the hand is touched is as shown in FIG.
It can be expressed as (b). That is, when touched, the rotation center of the camera 1 moves by x and the camera 1 (tilt sensor 2) tilts by θ.

FIG. 9 is a diagram showing the relationship between the inclination sensor 2 and the face 3. In FIG. 9, 4 is a light projecting element,
Reference numerals 5 and 6 respectively denote sensors that receive the reflected light from the light projecting element 4 and convert it into an electric current. Here, the sensor 5, the light projecting element 4, and the sensor 6 are arranged in a line in the vertical direction of the face 3.

FIG. 10 is a block diagram of an electric processing system. _{Reference numeral} 7 is an arithmetic circuit for processing the photocurrent I _p1 from the sensor 5 to generate a voltage proportional to the value represented by the equation (1) ′. The arithmetic circuit 8, like the arithmetic circuit 7, processes the photocurrent I _p2 from the sensor 6 to generate a voltage proportional to the value represented by the equation (2) ′.

[0006]

[Equation 1]

[0007]

[Equation 2]

Reference numeral 9 is a drive circuit for driving the light projecting element 4. The differential amplifier 10 is for differentially amplifying the output voltages of the arithmetic circuits 7 and 8. Here, the output of the differential amplifier 10 becomes a voltage proportional to the value expressed by the equation (3) ', and this voltage is proportional to the inclination of the face with respect to the sensor surface.

[0009]

[Equation 3]

That is, the amount of change in the tilt angle θ can be obtained by obtaining the amount of change in the equation (3) '. Thus the _{V OUT = αθ ... (4)} ' When the output voltage of the differential amplifier 10 and V _OUT. Where α is a constant of proportionality.

Here, when the distance between the face 3 and the sensor unit consisting of the light projecting element 4 and the sensors 5 and 6 is l, the proportional constant α of the equation (4) ′ is substantially constant even if l changes. It is experimentally known that

[0012]

The drawbacks of the prior art are shown in FIG.
This will be described using 1. 11, 4 to 6 are the same as in FIG. 12-A to 12-C represent the position of the face. The positions of the tilt sensor and the face are different depending on the photographer. The position is 12-A when it is far, and the position 12-C when it is close, and it varies between these positions.

Here, the projection angle of the light projected from the light projecting element 4 is represented by 13. Here, the definition of the projection angle is an angle range through which most of the light energy projected from the projection element 4 passes. Even outside this angle range, light passes but its energy is very small. Further, the light receiving angles of the sensors 5 and 6 are represented by 14 and 15, respectively. Here, the definition of the light receiving angle is an angle range through which most of the energy received by the sensors 5 and 6 passes.

Here, it is assumed that the light projecting angle of the light projecting element 4 and the light receiving angles of the sensors 5 and 6 are all the same, and that all the light is projected or received vertically upward with respect to the sensor surface. In this case, the sensors 5 and 6 cannot receive all the light projection spots formed on the face even when the face is distant and located at the position 12-A. At this position, the proportion of the projected energy received by the sensor 5 becomes an amount related to d _A5 / d _A4 . Even in the sensor 6, this ratio does not change.

When the face is at the position 12-B, the ratio of the energy received by the sensor 5 is d _B5 / d _B4.
The ratio is smaller than that in the case where the face is at the position 12-A. As described above, when the ratio of the energy received by the sensor to the projected energy changes depending on the position of the face, the relationship of the equation (4) ′ is not established and the proportional constant α changes depending on the position of the face. Correct tilt detection cannot be performed unless a means for monitoring the position of the face is additionally provided.

Further, the position of the face is closer, and
At the position of, the sensor 5 cannot receive the projected energy at all, and therefore the tilt cannot be detected. The camera shake amount detection device for a camera of the present invention has been made in view of such a problem, and the purpose thereof is to detect an accurate tilt regardless of the position of the face, that is, a camera shake amount detection device. An object is to provide a camera shake amount detection device.

[0017]

In order to achieve the above-mentioned object, firstly, in the present invention, the reflected light of the light projected from the light projecting means toward the object to be detected is described above. A camera shake amount detection device for a camera that receives light by first and second light receiving devices that are arranged with the light projecting device in between, and detects the amount of camera shake based on the reflected light information from the first and second light receiving devices. In, the light receiving angles of the first and second light receiving means are set to be larger than the light projecting angle of the light projecting means.

Secondly, according to the present invention, the reflected light of the light projected from the light projecting means toward the object to be detected is arranged so as to sandwich the light projecting means. In a camera shake amount detecting device for a camera that receives light by means and detects the amount of camera shake based on the reflected light information from the first and second light receiving means, when the object to be detected is at an allowable distance, The light receiving angles of the first and second light receiving means are set so that all the spot images formed on the detected object can be expected.

Thirdly, according to the present invention, the reflected light of the light projected from the light projecting means toward the object to be detected is arranged so as to sandwich the light projecting means. In a camera shake amount detecting device for a camera that receives light by means for detecting the amount of camera shake based on the reflected light information from the first and second light receiving means, and Two
The light receiving means is inclined and arranged so that the optical axis of the light receiving means makes an acute angle.

Fourthly, according to the present invention, the reflected light of the light projected from the light projecting means toward the object to be detected is arranged so as to sandwich the light projecting means. In a camera shake amount detecting device for a camera that receives light by means and detects the amount of camera shake based on the reflected light information from the first and second light receiving means, in front of each light receiving surface of the first and second light receiving means. Is provided with first and second condensing means for condensing the reflected light from the object to be detected, and the center of the condensing means is shifted to the light projecting means side with respect to the center of the corresponding light receiving means. Place it.

Fifthly, according to the present invention, the reflected light of the light projected from the light projecting means toward the object to be detected is arranged with the light projecting means sandwiched between the first and second light receiving means. In a camera shake amount detecting device for a camera that receives light by means and detects the amount of camera shake based on the reflected light information from the first and second light receiving means, in front of each light receiving surface of the first and second light receiving means. Is provided with first and second condensing means for condensing the reflected light from the object to be detected, and connects the center of the first condensing means with the center of the first light receiving means. The straight line and the second straight line connecting the center of the second light collecting means and the center of the second light receiving means make an acute angle with respect to the optical axis of the light projecting means, respectively. Two light collecting means are arranged.

[0022]

Embodiments of the present invention will now be described in detail with reference to the drawings. FIG. 1 shows a camera shake amount detection device according to a first embodiment incorporated in a camera. Reference numeral 11 is a sensor module. This sensor module 11 has a light emitting element 3
2 and sensors 33 and 34 as light receiving elements.

FIG. 2 is a view showing details of the cross section of the sensor module 11. In FIG. 2, the light projecting angle of the light projecting element 32 is a narrow angle as shown by 16.
Further, the light receiving angles of the sensors 33, 34 are wide angles as shown by 17, 18. 12-A to 12-C indicate the position of the face. 12-A is the case where the position of the face is farthest, 12-C is the case where the position of the face is closest,
12-B is an intermediate position.

According to the present embodiment, as shown in FIG. 2, even if the face position fluctuates between 12-A and 12-C, the light receiving angles of the sensors 33 and 34 are such that the light-emitted spots formed on the face. It includes all. Therefore, the sensors 33 and 34 receive all of the projected energy at all positions.

FIG. 3 is a block diagram of the electric system in this embodiment. In the figure, a sensor head amplifier 30 and a microcomputer 31 for sequence control are connected. Further, the sensor head amplifier 30 is connected with a light projecting element 32, a sensor 33 for detecting the amount of camera shake, that is, a sensor 34 for detecting a tilt angle of the face. The light projecting element 32 and the sensors 33 and 34 are all arranged on the back surface of the camera,
Moreover, the sensors 33 and 34 are arranged in a line so as to sandwich the light projecting element 32.

On the other hand, the microcomputer 31 has a warning display means 35, a date imprinting means 36, and an aperture drive circuit 3.
7, a mirror-up drive circuit 38, a front curtain drive circuit 39, a rear curtain drive circuit 40, a shutter charge drive circuit 41, and a winding drive circuit 42 are connected.

The present embodiment is an application of the present invention to a single-lens reflex camera, and has a diaphragm in the taking lens. 37 is a circuit for driving the diaphragm. The shutter uses a focal plane shutter and has a front curtain and a rear curtain. 39,
Reference numeral 40 is a drive circuit for driving the front curtain and the rear curtain. Although not shown in the figure, normally, the light from the taking lens is guided to the finder optical system above the mirror.
The light from the taking lens is switched to the shutter direction. Reference numeral 38 is a drive circuit for raising the mirror.

Reference numeral 35 is a warning display means when the camera shake condition is large and is provided in the finder so that it can be visually recognized by looking through the finder.
Detailed functions will be described later.

Reference numeral 41 denotes a shutter for charging a spring inside the focal plane shutter mechanism.
It is a charge drive circuit. Operate this drive circuit,
Simultaneously with the shutter charge, the initial position drive of the mirror (mirror down) and the initial position drive of the diaphragm are performed.

FIG. 4 is a circuit diagram showing details of the inside of the sensor head up 30. In the figure, 51 is a current value for supplying the current value I _ref . 52,53,5
4 is a diode. 55 and 56 are transistors. If the potential on the anode side of the diode 52 is V ₁ ,

[0031]

[Equation 4] Becomes Here, k is the Boltzmann constant, q is the unit charge amount of electrons, and I _S is the reverse saturation current of the diode (transistor).

Since photocurrents I _p1 and I _p2 flow through the emitters of the transistors 55 and 56, respectively, the emitter potentials V ₂ and V ₃ of the transistors are as shown in equations (2) and (3), respectively. .

[0033]

[Equation 5]

Reference numerals 57 and 58 are buffer amplifiers, and when their outputs are V ₄ and V ₅ , respectively,
V ₄ = V ₂ , V ₅ = V ₃ (4) Further, 59 and 63 are transistors, and 60 and 64 are diodes. When the collector currents of the transistors 59 and 63 are I _C1 and I _C2 , respectively, the equations (5) and (6) are established.

[0035]

[Equation 6]

On the other hand, 69 is V for generating V _{ref
This is a ref} generation circuit. The V _ref generated here is output to the outside through the B2 terminal, and the microcomputer 31
It is input to the C2 terminal of. As will be described later, the microcomputer 31 A / D-converts the voltage input from the C2 terminal. As the reference voltage of the A / D converter,
Use V _ref . That is, the potential from 0 V to V _ref is A / D converted by the designated number of bits.

The V _ref output from 69 is the resistance 7
After being divided by 0 and 71, it is input to the non-inverting input terminal of the buffer amplifier 72. Here, since 70 and 71 have the same resistance value, the output voltage V ₆ of the buffer amplifier 72 is
Is

[0038]

[Equation 7] Becomes Reference numerals 61 and 62 are PNP transistors which form a current mirror for returning the current. 65
Is a resistor having a resistance value R _L. A current obtained by subtracting the collector current of the transistor 63 from the output current of the transistor 62 flows through the resistor 65. Where transistor 62
Since the collector current of is equal to I _C1 , the potential V _{7 at} the upper end of the resistor 65 is

[0039]

[Equation 8] Becomes Further, this connection line is input to the non-inverting input terminal of the operational amplifier 66. The operational amplifier 66 is a non-inverting amplifier, and its amplification factor is determined by the resistors 67 and 68. When the resistance values of the resistors ₆₇ and ₆₈ are R ₆₇ and R ₆₈ , the output voltage V ₈ of this operational amplifier is

[0040]

[Equation 9] Becomes

[0041]

[Equation 10]

Therefore, when V ₈ is obtained at two different times and the difference voltage is obtained, the difference voltage is proportional to the variation of the tilt angle between the two different times. Here, the output of the operational amplifier 66 is output from the B1 terminal to the outside and from the C1 terminal of the microcomputer 31. The voltage input from the C1 terminal is A / D converted by an A / D converter inside the microcomputer 31.

Next, elements 73 to 77 are drive circuits for driving the external light projecting element 32 with a constant current. Among them, 73 and 74 are resistors for dividing V _ref ,
The resistance values are R ₇₃ and R ₇₄ , respectively. Reference numeral 75 is an operational amplifier, 76 is a transistor, and 77 is a resistor. The resistance value of the resistor 77 is R ₇₇ . Assuming that the direct current amplification factor H _FE of the transistor 76 is sufficiently high, the collector current of the transistor 76, that is, the drive current I _LED of the light projecting element 32 is

[0044]

[Equation 11] Becomes

Next, the operation of the embodiment will be described with reference to the flow charts of FIGS. FIG. 5 and FIG. 6 are flow charts when shooting is performed in the camera shake reduction mode. In the camera of this embodiment, although not shown, the release SW has a two-step stroke,
The first release SW is turned on in the first stroke, and the second release SW is turned on in the second stroke. Then, in step S1, the first release SW is monitored, and if the first release SW is in the on state, the process proceeds to step S2 to perform AF (autofocus).
Process. Since the details of this AF are not directly related to the present invention, the description thereof will be omitted.

Next, in step S3, the second release SW is monitored. If the second release SW is on, the process proceeds to step S4 to perform photometry. Next, in step S5, a signal is output to the diaphragm driving circuit 37 to start diaphragm driving. Then step S
At 6, a signal is output to the mirror-up drive circuit 38 to start the mirror-up. Succeedingly, in a step S7, the diaphragm drive and the end of the mirror up are detected. These end detections are performed by detecting the states of encoders (not shown).

Next, in step S8, the delay timer is started. The role of the delay timer will be described later. Next, in step S9, the amount of blurring is detected. The blur amount B (t) at time t is
Calculation is performed according to the equation 7).

B (t) = | V ₀ (t) −V ₀ (t−Δt) | (17) where V ₀ (t) is the output voltage from the B1 terminal at time t. Further, V ₀ (t−Δt) is the output voltage from the B1 terminal at a time point that is Δt before the time point t. In this way, when the blur amount is detected, the blur amount is determined in the subsequent step S10. Where B (t)>
If it is B _th (B _th is a constant), the amount of blurring is larger than the threshold value, so it is determined that the timing is inappropriate for performing exposure, and the process proceeds to step S11. In step S11, the count value of the delay timer started in step S8 is checked. If the count value is equal to or greater than a certain value, the process proceeds to step S12 to display a hand shake warning. Then, in step S13, the first release SW is monitored. If the first release SW is in the OFF state, the camera shake warning display is displayed in S23.
After FF, shutter charging is performed in S24, and then the process returns to step S1.

If the first release SW is in the ON state in step S13, it waits for the first release SW to be in the OFF state, and the process proceeds to step S23. If the count value of the delay timer is equal to or less than the fixed value in step S11, the process returns to step S9.

Here, the role of the delay timer is to limit the time in the exposure waiting state composed of steps S8, S9 and S10. That is, when the camera shake does not become small, the warning display means 35 in the viewfinder is activated after a certain period of time, and the release is disabled.

If the amount of camera shake is smaller than the threshold value in S10, that is, if B (t) ≦ threshold value, step S
In step 14, a date imprinting signal is output to the date imprinting means 36. Next, in step S15, a signal is output to the front curtain drive circuit 39 to start the front curtain. Next, in step S16, the exposure timer corresponding to the exposure movement is started according to the result of the photometry performed in step S4. Then, in step S17, a signal is output to the rear curtain drive circuit 40 to start the rear curtain.

Next, in step S18, a date imprinting timer is started. Here, the operation time T _D of the date imprinting timer is as shown in equation (18). T _D = T _DATE −T _EXP (18) Here, T _DATE is the time required for imprinting. See also T
_EXP is the time required for exposure, and steps S15 and S1
6, the time required for the sequence of S17.

Next, in step S19, a signal is output to the shutter charge drive circuit 41 to start shutter charge. Then, in step S20, a signal is output to the winding drive circuit 42 to start winding one frame. And then, in FIG.
In S21, the shutter charge and the end of winding are detected, and when both are finished,
Next, in step S22, the state of the first release SW is detected, and if the first release SW is in the OFF state, the process returns to step S1.

FIG. 7 is a diagram showing a modification of this embodiment. In FIG. 7, the optical axes of light received by the sensors 33 and 34 are tilted toward the light projecting element 32 by the same angle. Also in this embodiment, the light receiving angles of the sensors 33 and 34 can be made to be able to see all the spot images formed on the object to be detected by the light projected from the light projecting means.

A second embodiment of the present invention will be described below with reference to FIGS. 12 and 13. First, how the light beam of the camera shake detection unit passes will be described with reference to FIG. For simplification, blur detection of only one axis will be described. Sensor base 101
The projection light emitted from the upper projection LED 102 passes through the projection lens 103 and is projected on the face. At the time of shooting, it is assumed that the photographer's face is between the reflection surface position A and the reflection surface position B. If there is a face at the reflection surface position A, the projection light is
Make a spot between A1 and A2. The reflected light from this spot, which is between the light rays l1 and l2, reaches the light receiving sensor 105 through the light receiving lens 104.

Similarly, when the position of the face is at the reflecting surface position B, the range of the spot is between B1 and B2, and the reflected light rays between the light rays L3 and L4 pass through the light receiving lens 104 and are received. Reach the sensor 105. The same applies to the light receiving sensor 107.

When detecting the inclination of the light receiving surface, since the photocurrents due to the light received by the two light receiving sensors 105 and 107 are detected with a balance, the reflected light which has passed through the light receiving lenses 104 and 106 is not leaked to the light receiving sensor 105. You need to pick it up at 107.

Conventionally, as shown in FIG. 12, the optical axis m1 of the projected light and the optical axis m2 of the received light are set to be parallel. Therefore, on the light emitting LED side on the light receiving sensor 105,
There is a range d that does not contribute to light reception. Further, the received light flux of the reflected light tends to be concentrated on the side far from the light projecting lens.

Therefore, in this embodiment, the center of the light receiving sensor is arranged at a position farther from the optical axis of the light emitting LED than the center of the light receiving lens, thereby eliminating the range that does not contribute to the light reception of the light receiving sensor and reducing the size. Provided is a camera shake detection device having high detection ability.

More specifically, as shown in FIG.
The light receiving sensor (first light receiving means) 105 has a light emitting LED (light emitting means) as compared with the light receiving lens (first light collecting means) 104.
The light-receiving lens 104 and the light-receiving sensor 105 are arranged so as to be farther from 102 in a direction perpendicular to the optical axis m1. In other words, the center of the light receiving lens 104 is projected onto the center of the corresponding light receiving sensor 105 by the light emission LE.
It is arranged by shifting to the D102 side. As a result, the range that does not contribute to the light reception of the light receiving sensor 105 is eliminated, and the light receiving sensor 105 can be downsized.

The first straight line connecting the center of the light receiving lens 104 and the center of the light receiving sensor 105 and the light receiving lens (second
The second straight line connecting the center of the light collecting means 106) and the center of the light receiving sensor (second light receiving means) 107
The light receiving lenses 104 and 106 are arranged so as to form an acute angle with respect to the optical axis of 02.

When the lens and the sensor are arranged with an inclination, as shown in FIGS. 13 (b), 13 (c) and 13 (d), the light receiving sensor 105 is arranged rather than the light receiving lens 104. By arranging the light receiving sensor 105 further away from the light receiving sensor 105, the light receiving sensor 105 can be similarly downsized.

In the case of considering the above-mentioned configuration, the size of the reflected light of the projection spot (the range of which is between the light rays 12 and the light rays 13) reaches the light receiving sensor 105 sufficiently. The light receiving sensor 105 can be downsized.

Further, in the configuration of FIGS. 13A and 13C, the two light receiving sensors and the light emitting LEDs can be arranged on the same plane. Therefore, semiconductor chips are used for the light receiving sensor and the light emitting LED, and C.I.
O. B. Since it can be mounted using the (chip on board) technology, the mounting process can be automated and the number of assembling steps can be reduced.

[0065]

As described in detail above, according to the present invention,
A spot image formed on the object to be detected by the light projected from the projection means within a range where the position of the face fluctuates by increasing the light receiving angle of the sensor with respect to the projection angle from the projection element. Since the proportional constant α shown in the equation (4) ′ is always constant regardless of the position of the face, correct tilt detection (camera shake amount detection) can be performed regardless of the position of the face. Become.

[Brief description of drawings]

FIG. 1 is a diagram showing a camera shake amount detection device according to a first embodiment incorporated in a camera.

2 is a detailed view of a cross section of the sensor module of FIG. 1. FIG.

FIG. 3 is a block diagram of an electric system in the first embodiment.

FIG. 4 is a circuit diagram showing details of the inside of a sensor head up.

FIG. 5 is a front part of a flowchart for explaining the operation of the first embodiment.

FIG. 6 is a rear part of the flowchart for explaining the operation of the first embodiment.

FIG. 7 is a diagram showing a modification of the first embodiment.

FIG. 8 is a diagram for explaining a conventional method for detecting a camera shake amount.

FIG. 9 is a diagram showing a relationship between a tilt sensor and a face.

FIG. 10 is a block diagram of an electric processing system of a conventional camera.

FIG. 11 is a diagram for explaining a drawback of the conventional technique.

FIG. 12 is a diagram for explaining how a light beam of a camera shake detection unit passes.

FIG. 13 is a diagram showing a configuration of a second exemplary embodiment of the present invention.

[Explanation of symbols]

11 ... Sensor module, 16 ... Projection angle, 17, 18
... light receiving angle, 32 ... light projecting element, 33, 34 ... sensor.

─────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] August 10, 1994

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0056

[Correction method] Change

[Correction content]

Similarly, when the position of the face is at the position B of the reflecting surface, the range of the spot is between B1 and B2, and
The reflected light beam between l 3 and l 4 passes through the light receiving lens 104 and reaches the light receiving sensor 105. The same applies to the light receiving sensor 107.

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification number Internal reference number FI Technical display location G03B 13/36 (72) Inventor Hideto Kitazawa 2-43-2 Hatagaya, Shibuya-ku, Tokyo Olympus Optical Industry Co., Ltd. (72) Inventor Yoshinori Matsuzawa 2-43-2 Hatagaya, Shibuya-ku, Tokyo Olympus Optical Industry Co., Ltd. (72) Inventor Toshiro Kikuchi 2-43-2 Hatagaya, Shibuya-ku, Tokyo Olympus Optical Industry Co., Ltd.

Claims (5)

[Claims] 1. Reflected light of the light projected from the light projecting means toward the object to be detected is received by the first and second light receiving means arranged with the light projecting means in between, In a camera shake amount detection device for a camera that detects the amount of camera shake based on the reflected light information from the first and second light receiving means, the first and second light receiving means with respect to the light projecting angle of the light projecting means. A camera shake detection device for a camera, characterized in that the light receiving angle of is set to a large value. 2. Reflected light of the light projected from the light projecting means toward the object to be detected is received by the first and second light receiving means arranged with the light projecting means in between, In a camera shake amount detection device for a camera that detects the amount of camera shake based on the reflected light information from the first and second light receiving means, the first object when the object to be detected is at an allowable distance
And a camera shake amount detection device for a camera, wherein the light receiving angle of the second light receiving means is set so that all spot images formed on the object to be detected can be expected. 3. The reflected light of the light projected from the light projecting means toward the object to be detected is received by the first and second light receiving means arranged with the light projecting means in between, In a camera shake amount detection device for a camera that detects the amount of camera shake based on the reflected light information from the first and second light receiving means, the light of the first and second light receiving means with respect to the optical axis of the light projecting means. A camera shake detection device for a camera, characterized in that it is arranged so that its axis forms an acute angle. 4. The reflected light of the light projected from the light projecting means toward the object to be detected is received by the first and second light receiving means arranged with the light projecting means in between, In a camera shake amount detection device for a camera that detects a camera shake amount based on reflected light information from the first and second light receiving means, the detection target is provided in front of each light receiving surface of the first and second light receiving means. First and second light collecting means for collecting reflected light from an object are provided, and the center of the light collecting means is arranged so as to be displaced toward the light projecting means side with respect to the center of the corresponding light receiving means. A camera shake detection device for a camera. 5. The reflected light of the light projected from the light projecting means toward the object to be detected is received by the first and second light receiving means arranged with the light projecting means in between, In a camera shake amount detection device for a camera that detects a camera shake amount based on reflected light information from the first and second light receiving means, the detection target is provided in front of each light receiving surface of the first and second light receiving means. First and second light collecting means for collecting reflected light from an object are provided, and a first straight line connecting a center of the first light collecting means and a center of the first light receiving means, and a second straight line A second straight line connecting the center of the light collecting means and the center of the second light receiving means,
A camera shake amount detecting device for a camera, wherein the first and second light collecting means are arranged so as to form an acute angle with respect to an optical axis of the light projecting means.