JP4875971B2 - Image capturing apparatus and adjustment method thereof - Google Patents

Description

  The present invention relates to an imaging apparatus that performs camera shake correction, and an adjustment method that adjusts the imaging apparatus.

  Conventionally, in order to perform position adjustment that matches the center position in the photographing screen of the image sensor and the optical axis position of the photographing optical system with a photographing device such as a digital camera, as described in Patent Document 1, for example, In general, the photographic lens is incorporated so as to be movable in a direction perpendicular to the optical axis, and after adjusting the position, the photographic lens is generally fixed by an adhesive such as an ultraviolet curable adhesive or a fixing means such as a screw. . In addition, as described in Patent Document 1, not only the position adjustment is performed by moving the photographing lens, but the position is often adjusted by moving the position of the image sensor.

  Further, in the eccentricity adjustment method described in Patent Document 2, when the position of the lens is adjusted so that the state of resolution in the screen imaged by the image sensor through the photographing optical system is the best, and the image state is the best The lens frame is fixed to the frame. Furthermore, in the center positioning method described in Patent Document 3, the center positioning chart is imaged, and the center alignment is performed by detecting the deviation amount between the captured chart center position and the center position of the light receiving unit of the imaging device. The structure which performs is described. Alternatively, the image frame centering method described in Patent Document 4 has a configuration in which the center of the photographic image frame is aligned with the optical axis of the photographic lens by variably setting a range in which the imaging signal is cut out (trimmed) from the effective area of the imaging element. .

Further, when the zoom lens apparatus is provided as a photographing optical system, for example, after the zoom magnification is varied between the telephoto side and the wide angle side to find the position of the zoom center, first the position of the zoom center is set at the wide angle end position. Adjust the mounting position of the image sensor by changing the screwing amount of the adjustment screw so that is positioned at the center of the shooting screen, and then move the shooting optical system to the telephoto end position and zoom Adjustment is made in the same way as at the wide-angle end so that the center of the screen is at the same position. Then, the position is returned again to the wide-angle end position, and it is confirmed that the position of the center of the photographing screen is not shifted. Thereafter, the same operation is performed until the shift of the center position is within the allowable range at the telephoto end and the wide-angle end. After the adjustment of the center position is completed, the image sensor mounting portion is fixed by soldering or bonding.
JP 2003-015008 A JP 2001-257930 A Japanese Patent Laid-Open No. 08-159919 Japanese Patent Laid-Open No. 06-174991

  However, when the decentering adjustment of the zoom lens apparatus is performed by the method as described above, the photographing and the position adjustment are repeatedly performed at the wide-angle end and the telephoto end, respectively, and the work of adjusting the position shift of the photographing screen center at each position is not performed. It has to be done again and again, and it takes a lot of work and time. Even when the adjustment methods described in Patent Documents 1 to 4 are used in a zoom lens apparatus, it is necessary to repeatedly perform position adjustment at the wide-angle end and the telephoto end.

  The present invention has been made in consideration of the above circumstances, and a photographing apparatus capable of easily and highly accurately adjusting the center position for matching the optical axis of the photographing lens with the photographing screen center of the image sensor, and the adjustment thereof. It aims to provide a method.

In the present invention, camera shake amount detecting means for detecting a shake amount of the housing, a photographing optical system including a correction lens, an image sensor for photographing a subject image that has passed through the photographing optical system, and a position of the correction lens are detected. Position detecting means, a driving means for moving the correction lens, and the position of the correction lens detected by the position detecting means so as to coincide with a target value corresponding to the shake amount detected by the camera shake amount detecting means. and a control unit to cancel the camera shake by controlling the driving means, and storage means for storing the electrical signal information corresponding to the driving amount of the correcting lens by said drive means, said control means swings the housing The position of the correction lens is moved by controlling the driving means so that the optical axis of the photographing optical system at the center position and the center of the photographing screen of the image sensor coincide with each other. Said electrical signal information at this time were allowed previously stored in the storage means, before photographing, the photographing apparatus which performs center position adjustment of the correction lens from said storage means reads out the electrical signal information, said position detecting means A position sensor that outputs a signal having a value corresponding to the position of the correction lens, an amplifying means that amplifies the output signal from the position sensor and outputs an amplified signal to which a certain offset amount is added, and the amplification Signal converting means for converting the amplified signal output from the means into an electrical signal that can be recognized by the control means, the amplifying means comprising offset amount adjusting means capable of adjusting the offset amount, Obtaining an unadjusted signal obtained by measuring the amplified signal when the correction lens is positioned at one end and the other end of the moving range, and an average value of these unadjusted signals; The difference value with the center value of the output signal range that can be converted by the signal conversion means is calculated, and the amplified signal at the one end or the other end becomes a reference value obtained by adding the difference value to the signal before adjustment. The offset amount is adjusted .

According to a second aspect of the present invention, there is provided a camera shake amount detecting means for detecting a shake amount of the housing, a photographing optical system, an image sensor for photographing a subject image that has passed through the photographing optical system, and a position of the image sensor. Position detecting means for detecting, driving means for moving the image sensor, and position of the image sensor detected by the position detecting means so as to coincide with a target value corresponding to the shake amount detected by the hand shake amount detecting means. and storage means for storing a control unit to cancel the camera shake by controlling the drive means, an electrical signal information corresponding to the driving amount of said image sensor by said drive means, said control means swings the casing The image sensor is controlled by controlling the driving means so that the center of the image capturing screen of the image sensor at the center position is coincident with the optical axis of the image capturing optical system. Position by moving the, the electrical signal information at this time were allowed previously stored in the storage means, before photographing, photographing and reading the electrical signal information from the storage unit carries out the center position adjustment of the image sensor In the apparatus, the position detecting means outputs a signal having a value corresponding to the position of the image sensor, and amplifies an output signal from the position sensor and outputs an amplified signal to which a certain offset amount is added. And an amplifying means for converting the amplified signal output from the amplifying means into an electric signal recognizable by the control means, wherein the amplifying means adjusts the offset amount. A pre-adjustment signal obtained by measuring the amplified signal when the image sensor is located at one end and the other end of the moving range. The difference value between the average value of these pre-adjustment signals and the center value of the output signal range that can be converted by the signal conversion means is calculated, and the amplified signal at the one end or the other end is converted into the difference from the pre-adjustment signal. The offset amount is adjusted to be a reference value obtained by adding the values .

  Further, the photographing optical system includes a zoom lens mechanism capable of changing a zoom magnification, and the control means is a center position of the correction lens or the image sensor at a tele end position and a wide end position of the photographing optical system. Adjustment is performed to obtain the electrical signal information at the tele end position and the wide end position, and linear interpolation calculation is performed on the electrical signal information at zoom positions other than the tele end position and the wide end position from the electrical signal information. It is preferable to obtain by

According to a fourth aspect of the present invention, there is provided a method of adjusting a photographing apparatus, including a camera shake amount detecting means for detecting a shake amount of a housing, a photographing optical system including a correction lens, and an image sensor for photographing a subject image that has passed through the photographing optical system. The position detection means for detecting the position of the correction lens, the drive means for moving the correction lens, and the position of the correction lens detected by the position detection means correspond to the shake amount detected by the camera shake amount detection means. and a control unit to cancel the camera shake by controlling the drive means so as to coincide with the target value, and storage means for storing the electrical signal information corresponding to the driving amount of the correcting lens by said drive means, said housing The correction lens is moved by the driving means so that the optical axis of the imaging optical system at the center position and the center of the imaging screen of the image sensor coincide with each other. Adjustment setting processing for acquiring the electrical signal information and storing the electrical signal information in advance in the storage means, reading the electrical signal information from the storage means, and driving the drive means based on the electrical signal information to correct the correction lens In the adjustment method of the photographing apparatus for performing the lens position adjustment process for performing the position adjustment, the position detection unit outputs a signal having a value corresponding to the position of the correction lens, and an output signal from the position sensor And a signal converting means for converting the amplified signal output from the amplifying means into an electric signal recognizable by the control means. The amplifying unit includes an offset amount adjusting unit capable of adjusting the offset amount, and the correction lens is positioned at one end and the other end of the moving range. To obtain a pre-adjustment signal obtained by measuring the amplified signal and calculate a difference value between an average value of these pre-adjustment signals and a center value of an output signal range that can be converted by the signal conversion means, The offset amount is adjusted so that the amplified signal at the end becomes a reference value obtained by adding the difference value to the signal before adjustment .

6. The method of adjusting a photographing apparatus according to claim 5, wherein a camera shake amount detecting means for detecting a shake amount of the casing, a photographing optical system, an image sensor for photographing a subject image passing through the photographing optical system, and the image sensor. A position detecting means for detecting the position of the image sensor, a driving means for moving the image sensor, and a position of the image sensor detected by the position detecting means coincides with a target value corresponding to a shake amount detected by the shake amount detecting means. Control means for controlling the drive means so as to cancel out camera shake, and storage means for storing electrical signal information corresponding to the drive amount of the image sensor by the drive means, so that there is no shake in the housing The image sensor is moved by the driving means so that the center of the imaging screen of the image sensor at the center position matches the optical axis of the imaging optical system, The electrical signal information at this time is acquired and adjusted and stored in advance in the storage means, and the electrical signal information is read from the storage means, and the drive means is driven based on the electrical signal information to generate the image. In the adjustment method of the photographing apparatus that performs the lens position adjustment process for adjusting the position of the sensor, the position detection unit outputs a signal having a value corresponding to the position of the image sensor, and an output from the position sensor Amplifying means for amplifying the signal and outputting an amplified signal to which a certain offset amount is added; and signal converting means for converting the amplified signal output from the amplifying means into an electric signal recognizable by the control means. The amplifying unit includes an offset amount adjusting unit capable of adjusting the offset amount, and the image sensor includes one end of a moving range thereof and The pre-adjustment signal obtained by measuring the amplified signal at the end is obtained, and the difference value between the average value of these pre-adjustment signals and the center value of the output signal range that can be converted by the signal conversion means is calculated. The offset amount is adjusted so that the amplified signal at the one end or the other end becomes a reference value obtained by adding the difference value to the signal before adjustment .

  In addition, the center position of the correction lens or the image sensor is adjusted from the state of the luminance distribution of an image obtained by photographing the flat subject that is uniformly filled with the image sensor, or the planar shape on which a checkerboard pattern is formed. It is preferable to adjust the center position of the correction lens or the image sensor based on the distortion amount of the cells of the image obtained by photographing the subject with the image sensor.

  The photographing optical system includes a zoom lens mechanism capable of changing a zoom magnification, and adjusts a center position of the correction lens or the image sensor at a tele end position and a wide end position of the photographing optical system to adjust the tele end. The electrical signal information at the position and the wide end position is acquired, and from the electrical signal information, the electrical signal information at the zoom position other than the tele end position and the wide end position is obtained by linear interpolation, and stored in the storage unit It is preferable to memorize.

The photographing optical system includes a zoom lens mechanism capable of changing a zoom magnification, and adjusts a center position of the correction lens at a wide end position of the photographing optical system to obtain the electric signal information, and After the center position adjustment at the end position is completed and the case is shaken up and down, left and right, after capturing and acquiring a movement locus of an image with an arbitrary marking, the imaging optical system Is changed from the wide end position to the tele end position, and the movement trajectory of the marking at the tele end position obtained by photographing in a state in which the case is shaken vertically and horizontally is the mark at the wide end position. and controls the drive means to match the movement locus of the marking, and sets the electrical signal information at this time as electrical signal information in the telephoto end position, before Said electrical signal information at the telephoto end position and zoom position other than the telephoto end position and the wide end position from the electrical signal information in the wide-angle end position determined by the linear interpolation operation, and stores these electrical signal information in said storage means It is preferable.

According to the present invention, the correction lens or the image sensor is moved by the driving means so that the optical axis of the imaging optical system and the center of the imaging screen of the image sensor coincide with each other when the housing is in the center position without any shake. Then, the electrical signal information at this time is acquired and stored in advance in the storage means, the electrical signal information is read from the storage means, and the drive means is driven based on the electrical signal information to center the correction lens or the image sensor. positioning the line Utotomoni, the average value of the before adjustment signal amplified signals to obtain an adjustment before the signal was measured when the correcting lens or an image sensor is positioned at one end and the other end of its movable range, signal conversion Calculate the difference value from the center value of the output signal range that can be converted by the means, and amplify the amplified signal at one end or the other end so that it becomes the reference value obtained by adding the difference value to the signal before adjustment Since the offset amount of the stage is adjusted, it is possible to perform center alignment easily and accurately.

  A digital camera to which a first embodiment of the present invention is applied will be described with reference to the drawings. In FIG. 1 showing the appearance of the present embodiment, a collapsible lens barrel 12 is provided on the front surface of a camera body (housing) 11 of the digital camera 10. A photographing lens 13 is held on the lens barrel 12. In addition, a strobe light emitting unit 14 is disposed on the upper front portion of the camera body 11.

  A shutter button 15 and an operation dial 16 are provided on the upper surface of the digital camera 10. The operation dial 16 turns on / off the power switch and switches between a still image shooting mode / moving image shooting mode / playback mode / setting mode. In the moving image shooting mode, for example, a moving image of up to 3 minutes can be recorded by continuously shooting still images at a speed of 30 frames / second or the like.

  In FIG. 2, a liquid crystal panel (LCD) 20 is provided on the back surface of the digital camera 10. The LCD 20 functions as an electronic viewfinder in each still and moving image shooting mode, displays a through image in real time, and reads out still image and moving image data stored in the memory card 18 in the reproduction mode. To display still images and movies. Further, in the setting mode, various setting screens are displayed. In addition, zoom buttons 22 a and 22 b used for zoom magnification operations are provided on the back of the digital camera 10.

  The memory card 18 is detachably loaded in a memory card slot 23 provided on the side of the digital camera 10. Image data obtained in the shooting mode is stored in the memory card 18. The cursor button 24 is used for switching various settings and for operations on various processing confirmation screens displayed on the LCD 20. The decision button 25 executes the process selected by the cursor button 24.

  In FIG. 3 showing the electrical configuration of the digital camera 10, the system control unit 26 includes a CPU 27 as a main component and a ROM 28 and a RAM 29 which are storage means. The ROM 28 stores various sequence programs, control data, and the like, and the RAM 29 temporarily stores work data. The system control unit 26 is based on various programs such as image shooting, recording, reproduction, erasure, and data transfer according to operation signals generated by operating the shutter button 15, the operation dial 16, the cursor button 24, and the enter button 25. Each part of the digital camera 10 is comprehensively controlled.

  Further, the system control unit 26 receives a signal corresponding to the angular velocity of the camera body 11 detected by camera shake detection units 46 and 47, which will be described later, and an A / D converter 31 that digitally converts this signal, and this An integration calculation processing circuit 32 for integrating the digitally converted signal with respect to time is provided, and the shake amount of the digital camera 10 is detected from the calculation value of the integration calculation processing circuit 32.

  The photographing lens 13 includes a zoom lens 13a, a focus lens 13b, and a correction lens 13c. The zoom lens 13a and the focus lens 13b are moved by driving of the drive motors 33 and 34, respectively. The correction lens 13c is attached so as to be movable in a direction substantially orthogonal to the optical axis, and moves by driving VCMs 51 and 52 described later.

  The drive motors 33 and 34 are stepping motors and are connected to the motor driver 32. The operation of the drive motors 33 and 34 is controlled by control pulses from a motor driver 32 connected to the system control unit 26.

  A CCD 35 is disposed behind the photographic lens 13. When displaying a through image, an imaging signal of a field image (even field or odd field) is read from the CCD 35 and this imaging signal is input to the CDS / AMP circuit 36.

  The CDS / AMP circuit 36 includes a correlated double sampling circuit (CDS) and an amplifier (AMP). The CDS generates R, G, B analog image signals from the imaging signals output from the CCD 35. The AMP amplifies the R, G, B analog image signals. The A / D converter 37 converts the analog image signal output from the CDS / AMP circuit 36 into image data that is a digital image signal.

  The image data output from the A / D converter 37 is input to an image signal processing circuit 38, where after image processing such as gradation conversion, white balance correction, γ correction, and YC conversion processing is performed, The data is temporarily stored in the SDRAM 39 via the data bus 45, sent to the LCD 20 via the LCD driver 41, and a through image is displayed. The SDRAM 39 has a through-image memory area for storing two continuous field fractions, and writes to the other while reading from one.

  While the through image is displayed, AF control and AE control are performed at regular time intervals. In AF control, while moving the focus lens constituting the photographing lens 13, the focus position where the contrast (the value obtained by integrating the differences between adjacent pixels) is maximized is detected, and the focus lens is set at this focus position. To do. In the AE control, the diaphragm constituting the photographing lens 13 is changed.

  When the shutter button 15 is half-pressed (switch S1 is turned on), AE photometry is started. In this photometry, the subject brightness of the entire screen is calculated from the brightness (Y) data, the exposure amount is calculated from the obtained subject brightness, and the combination of the exposure time and the aperture value is determined. Further, AF control is started, the focus lens constituting the photographing lens 13 is moved, and a focus position where the contrast (a value obtained by integrating the difference between adjacent pixels) is maximized is detected. A focus lens is set at this in-focus position.

  At the time of actual shooting by fully pressing the shutter button 15 (switch S2 is turned on), the aperture is set to the aperture value determined by AE metering, the charge of the CCD 35 is forcibly drained, and the photoelectric conversion of the CCD 35 is started. To do. When the exposure time elapses, the shutter is activated and the photoelectric conversion of the CCD 35 is stopped.

  After the shutter is closed, a frame image is read from the CCD 35, and then processed by the image signal processing circuit 38 through the CDS / AMP circuit 36 and A / D converter 37 (A / D conversion, gamma conversion, white balance, sharpness). After processing, YC conversion, etc.), it is written in the SDRAM 39. The image data of the frame image is read from the SDRAM 39, compressed in a predetermined compression format such as JPEG format by the compression / decompression processing circuit 42, and then recorded on the memory card 18 via the media controller 43. Further, the system control unit 26 drives the strobe light emitting circuit 44 to cause the strobe light emitting unit 14 to emit light when the luminance of the subject is lower than a predetermined threshold value.

  The inside of the lens barrel 12 has a configuration shown in detail in FIG. 4, and includes a photographing lens 13, a CCD 35, camera shake detection units 46 and 47, position detection units 48 and 49, and a voice coil motor as drive means. (VCM) 51 and 52 are incorporated. Further, a lens frame 50 for holding the correction lens 13c is provided, and the lens frame 50 is movably attached to the lens barrel 12.

  As shown in FIG. 4, the position detection unit 48 supplies a magnet 53, a hall element 54, and power to the hall element 54, and amplifies and acquires an output signal from the hall element 54. It consists of. As shown in detail in FIG. 5, the sensor control unit 55 includes a differential amplifier 57, a hall element driving unit 58, a bias voltage setting unit 59, resistors 61 to 64, a capacitor 66, an A / D converter 67, and the like. ing. When the output signal from the Hall element driving unit 58 is input to the Hall element 54, the sensor control unit 55 outputs an output from the Hall element 54 that varies depending on the distance from the magnet 53 provided in the lens frame 50. The signal can be amplified by the differential amplifier 58, and the amplified signal from the differential amplifier 58 can be converted into a digital signal by the A / D converter 67 to detect the position. The bias voltage setting unit 59 adds a bias to the output voltage from the Hall element 54 to adjust the DC level that serves as a position detection reference for the correction lens 13c. The position detector 49 has the same configuration as the position detector 48, and the position detectors 48 and 49 are provided at positions orthogonal to each other with the optical axis of the correction lens 13c as the center. Thereby, the position detectors 48 and 49 detect the positions of the correction lens 13c in the X and Y directions, respectively, and transmit them to the system controller 26.

  As shown in the figure, the VCM 51 includes a drive coil 66 provided on the lens frame 50 and a magnet 67 fixed to the lens barrel 12, and the drive coil 66 is connected to a VCM drive circuit 68. The VCM 52 has the same configuration as the VCM 51, and the VCMs 51 and 52 are provided at positions facing the position detection units 48 and 49, respectively, around the optical axis of the correction lens 13c. The system control unit 26 controls the current supplied to the drive coil 66 via the VCM drive circuit 68. A repulsive force corresponding to the energized current is generated between the drive coil 66 and the magnet 67. When a repulsive force is generated between the drive coil 66 and the magnet 67, the lens frame 50 moves along the X and Y directions. As a result, the correction lens 13c moves and the optical path of the photographing lens 13 is deflected.

  The system control unit 26 controls the VCM driving circuit 68 on the basis of the shake amount of the digital camera 10 calculated by the integration calculation processing circuit 32 and the lens position signals from the position detection units 48 and 49, thereby canceling the camera shake. The correction lens 13c is moved in the direction and speed. Further, the system control unit 26 is provided with a bias storage unit 70 as a storage unit. In the adjustment setting mode, which will be described later, the system control unit 26 determines a bias voltage value corresponding to the initial position of the correction lens 13c and stores it in the bias storage unit 70. The corresponding bias voltage value is read and the VCM drive circuit 68 is controlled.

  As shown in detail in FIG. 6, the camera shake detection unit 46 includes a gyro sensor 71 and a sensor external processing circuit 72. The gyro sensor 71 includes a prismatic vibrator 73, detection piezoelectric elements 74 and 75 facing two sides facing the vibrator 73, and an oscillating piezoelectric element facing the other two sides adjacent to these. It comprises an element 76, 77, a piezoelectric element drive circuit 78 that drives these piezoelectric elements 76, 77, a synchronous detection amplifier 80, and a sensor control unit 81 that controls these elements. In this embodiment, in order to detect the shake amount in the two directions of the X and Y directions, a shake detection unit 47 having the same configuration as the shake detection unit 46 is provided, and the detection direction is orthogonal to the shake detection unit 46. Is arranged.

  The sensor control unit 81 is provided with an oscillation circuit 82 that oscillates a control pulse having a predetermined period. From the oscillation circuit 82, for example, an 8 kHz control pulse is input to the piezoelectric element drive circuit 78. Then, the piezoelectric element driving circuit 78 to which the control pulse is input oscillates a driving signal synchronized with the timing of the control pulse to the piezoelectric elements 76 and 77. The piezoelectric elements 76 and 77 excite the vibrator 73 when a drive signal from the piezoelectric element drive circuit 78 is applied. When the vibrator 73 rotates in this state, the output voltage generated by the Coriolis force according to the rotational angular velocity is derived from the piezoelectric elements 74 and 75.

  The output voltage from the piezoelectric elements 74 and 75 output according to the drive signal described above is input to the synchronous detection amplifier 80. The synchronous detection amplifier 80 includes a differential amplifier and a sample and hold, and outputs an amplified signal obtained by differentially amplifying the output voltage from the piezoelectric elements 74 and 75 by sampling and holding.

  The sensor external processing circuit 72 includes a high pass filter 83 and an amplification amplifier 84. The high pass filter 83 includes a capacitor 86, a resistor 87, and a reference power supply 88. The capacitor 86 is connected to the output side of the synchronous detection amplifier 80, and the resistor 87 is connected between the capacitor 86 and the reference power supply 88. The amplified signal output from the synchronous detection amplifier 80 is input to the amplification amplifier 84 through the high pass filter 83. The amplified signal passed through the high-pass filter 83 is amplified by the amplification amplifier 84 and output to the A / D converter 31 of the system control unit 26 described above. The amplification factor of the amplification amplifier 84 is set to 50 times, for example.

  In the digital camera 10 and the adjustment method thereof according to the present embodiment, the center position adjustment setting for aligning the optical axis CL of the photographing lens 13 and the center of the photographing screen of the CCD 35 at the time of an assembly process or an inspection process is performed in advance. At the time of shooting, center position adjustment processing is executed using electrical signal information (bias voltage value in this embodiment) based on the adjustment setting. Hereinafter, a process when adjustment setting is performed in the digital camera 10 of the present embodiment will be described with reference to a flowchart shown in FIG. Further, before this center position adjustment is performed, the correction lens 13c remains in the lens barrel 12, and no fine position adjustment is required.

  When performing this adjustment setting, the digital camera 10 is operated by inputting operation buttons that are provided at locations different from the operation members used for normal shooting or image reproduction operation, for example, inside the battery cover. When the power is turned on, each part is activated, and the adjustment setting mode is started. Then, the system control unit 26 photographs the subject through the photographing lens 13 with the CCD 35 and extracts the optical axis position of the photographing lens 13 based on the photographed image.

  In the present embodiment, when the center position adjustment setting of the digital camera 10 is performed, a panel in which the entire surface is uniformly painted with a single color (for example, gray) is photographed as a subject, and a photographing lens is based on the photographed image. The optical axis position of is extracted. A specific method for adjusting the center position will be described with reference to FIGS. When a single color panel as described above is photographed, an image as shown in FIG. 8A is photographed when the optical axis position of the photographing lens 13 is located at the center of the photographing screen. In FIG. 8, an image is expressed using hatching, but this is not a pattern, and the narrowness of the hatched mesh represents the color density of the image. In the image shown in FIG. 8A, the position of the optical axis CL coinciding with the center of the shooting screen is the brightest (the highest brightness), and gradually darkens outward from the center position. The four corners of the shooting screen are the darkest images (the lowest brightness). However, if the position of the optical axis is deviated from the center position of the shooting screen, the brightest portion is deviated from the center position of the shooting screen as shown in FIG. 8B, and the darkest portion is other than the four corners. positioned. FIG. 8B shows an example in which the optical axis is shifted downward with respect to the center of the photographing screen. Thus, if the position of the optical axis of the photographing lens 13 is deviated, the brightness distribution state in the photographing screen will be different even if the same subject is photographed, and this is used to detect the position of the optical axis.

  Therefore, in the center position adjustment, first, as shown in the flowchart of FIG. 9, the system control unit 26 controls the position of the correction lens 13c to the position where the movement amount of the correction lens 13c is 0, that is, the state where the bias voltage value is 0. Import images taken with. In the flowchart shown in FIG. 9, the center position adjustment in the vertical direction is mainly described. However, the center position adjustment in the left-right direction is actually performed at the same time. Then, the system control unit 26 measures the luminance levels at the upper end portion and the lower end portion of the image, and compares these luminance levels. That is, as shown in FIG. 8B, when the optical axis position CL is shifted downward with respect to the imaging screen center O, the luminance level at the upper end is lower and the luminance level is higher at the lower end. Therefore, the system control unit 26 drives the VCM 51 to move the correction lens 13c upward. When the brightness level is higher at the upper end, the correction lens is moved downward. As described above, the bias voltage value of the VCM drive circuit 68 is changed according to the position of the correction lens 13c to drive the VCMs 51 and 52, thereby gradually moving the correction lens 13c and setting the optical axis position CL to the center O of the photographing screen. To match. The system control unit 26 stores the bias voltage value at this time in the bias storage unit 70 as electrical signal information at the center position.

  Furthermore, in the present embodiment, the zoom lens 13a included in the photographic lens 13 is configured to move to change the zoom magnification. Therefore, the center position adjustment is performed by adjusting the position of the zoom lens 13a according to each zoom magnification ( This is performed for each zoom position), and electrical information for center position adjustment corresponding to each zoom position is written in the bias storage unit 70. When the adjustment setting mode is completed at all zoom positions, the respective units are stopped, the power supply to the VCMs 51 and 52 is stopped, and the correction lens 13c is in a state before adjustment.

  A process when photographing with the digital camera 10 having the above configuration will be described with reference to a flowchart shown in FIG. When shooting with the digital camera 10, first, when the operation dial 16 is operated to select a shooting mode, the power is turned on, and each unit is activated. After confirming that the shooting mode is selected, the system control unit 26 that has been activated confirms the current zoom magnification, and the bias at the center position corresponding to the zoom position at that time is checked from the bias storage unit 70. The voltage value is read and the center position adjustment process is executed. That is, the system control unit 26 drives the VCMs 51 and 52 by controlling the VCM driving circuit 68 based on the read bias voltage value. As a result, the correction lens 13c moves to deflect the optical path of the photographing lens 13, the optical axis position of the photographing lens 13 coincides with the center of the photographing screen of the CCD 34, and the center alignment is completed. Thereafter, the imaging process, the position detection of the correction lens 13c, the camera shake detection, and the camera shake correction process are executed based on the state of the center alignment. When the zoom magnification is changed by operating the cursor button 24, the center position adjustment is performed by reading the bias voltage value at the center position corresponding to the zoom position and driving the VCMs 51 and 52 each time. Then, framing while viewing the through image displayed on the LCD 20, and when the shutter button 15 is pressed halfway, shooting preparation processing such as AE processing and AF processing is performed, and camera shake is detected by the system control unit 26 and the camera shake detection unit 29. Be started. When the shooting preparation process is completed and the shutter button 15 is fully pressed, shooting is performed while performing camera shake correction, and the subject image is shot and acquired, and stored in the memory card 18. In this way, since shooting is performed by adjusting the position of the optical axis of the taking lens 13 and the center of the shooting screen of the CCD, the number of parts can be increased by using the configuration of the shake detection unit, the shake correction unit, and the like. It is possible to easily perform high-precision center alignment while suppressing, and furthermore, adjustment can be performed at each zoom position without the need for mechanical fixing such as soldering or screwing Therefore, it is possible to easily perform the work process without taking time and effort.

  In the first embodiment, the center position is adjusted and set at each zoom position, and the bias voltage value for each zoom magnification is stored. However, the present invention is not limited to this. In the following modifications, the center position is adjusted and set only at two positions, the tele end (telephoto end) and the wide end (wide angle end), as the zoom position, and the bias voltage value at the center position at other zoom positions is set. An example in which interpolation is performed by linear interpolation will be described. In this case, a relationship as shown in FIG. 11, that is, a relationship in which the amount of movement of the correction lens increases logarithmically with respect to the zoom position. Therefore, since the movement amount of the correction lens at the tele end and the wide end is known from the bias voltage values corresponding to the respective center positions, the coefficient of the logarithmic curve of FIG. 11 is obtained from these bias voltage values. Then, from the relational expression of the logarithmic curve determined by this coefficient, the amount of movement of the correction lens at other zoom positions is calculated, and further, a bias voltage value corresponding to the amount of movement of this correction lens is obtained, so that A bias voltage value corresponding to the center position can be obtained. Further, the calculation method is not limited to such a method, and may be performed using the relationship between the zoom magnification and the movement amount of the correction lens shown in FIG. In this case, since the movement amount of the correction lens is proportional to the zoom magnification, it is possible to easily obtain a proportional coefficient from the movement amount of the correction lens at the tele end and the wide end. The movement amount of the correction lens and the bias voltage value at each zoom magnification can be obtained from the relational expression.

  In the first embodiment, the optical axis position of the photographic optical system is extracted based on a photographed image obtained by photographing a subject whose entire surface is filled with a uniform color during the adjustment setting. However, the present invention is not limited to this, and the optical axis position of the photographing optical system may be extracted from a photographed image obtained by photographing a subject having a rectangular pattern in which a rectangular shape is continuous vertically and horizontally as shown in FIG. . Hereinafter, an example in which the optical axis position is extracted based on the subject on which the checkerboard pattern is formed will be described. In addition, as shown in FIG. 13, this checkerboard pattern is preferably a flat panel in which squares each having a straight line are continuously arranged. In an image obtained by photographing such a square-patterned panel with the CCD 34 through the photographing optical system, as shown in FIGS. 13B and 13C, the distortion of the squares gradually increases from the center toward the outside. When the optical axis position of the photographing lens is located at the center of the photographing screen, an image as shown in FIG. 13B is photographed. That is, the grid near the optical axis that coincides with the center of the shooting screen has the least distortion (substantially a straight line), gradually distorts outward from this center position, and the vicinity of each edge of the shooting screen has the most distortion of the grid. growing. However, when the optical axis position is deviated from the center position of the shooting screen, as shown in FIG. 13C, the portion with the least amount of distortion is deviated from the center position of the shooting screen. As described above, when the position of the optical axis of the photographing lens 13 is deviated, the amount of distortion in the photographing screen differs even when the same subject is photographed. Therefore, the position of the optical axis is detected using this. In the center position adjustment using this example, first, as shown in the flowchart of FIG. 14, the above-described panel is photographed after controlling the movement amount of the correction lens 13c to the position where the correction lens 13c is zero, that is, the bias voltage value is zero. Captured images. Then, the system control unit 26 measures the distortion amounts at the upper end portion and the lower end portion of the image, and compares these distortion amounts. That is, as shown in FIG. 13C, when the optical axis position CL is shifted downward with respect to the imaging screen center O, the distortion amount at the upper end is larger, and the distortion amount is smaller at the lower end. Therefore, the system control unit 26 drives the VCM 51 to move the correction lens 13c upward. When the distortion amount is smaller at the upper end, the correction lens is moved downward. In this way, the correction lens 13c is gradually moved so that the optical axis position CL coincides with the photographing screen center O. The system control unit 26 stores the bias voltage value at this time in the bias storage unit 70 as electrical signal information at the center position.

  In the first embodiment, the position of the correction lens is moved to adjust the position of the optical axis of the photographing lens and the center of the photographing screen of the image sensor, but the present invention is not limited to this. In the second embodiment of the present invention described below, the center position is adjusted by moving the position of the image sensor. FIG. 15 shows the configuration of a digital camera to which the second embodiment is applied. In the digital camera 100 shown in FIG. 15, a position detection unit 102 for detecting the position of the CCD 101 as an image sensor, an actuator 103 as a driving means for moving the CCD 101, a motor driver 104 for controlling the actuator 103, a digital A system control unit 105 that controls each unit of the camera 100 and an information amount storage unit 106 are provided. The actuator 103 can move the CCD 101 along the X and Y directions, and the drive is controlled by the system control unit 105 via the driver 104. Moreover, about what uses the components similar to the said 1st Embodiment, the same code | symbol is attached | subjected and description is abbreviate | omitted. Furthermore, in the present embodiment, the correction lens is not included in the photographing lens 107, and the camera shake is corrected by moving the CCD 101 in a direction and a shake amount that cancels the camera shake. That is, when the camera shake is detected by the camera shake detection units 46 and 47, the system control unit 105 drives the actuator 103 while the position detection unit 102 detects the position of the CCD 101 in the X and Y directions, and cancels the camera shake of the CCD 101. Move in the direction and amount of shake. The actuator 103 may be any driving means that can move the CCD 101 by controlling a current value to be energized, such as a piezoelectric element or a voice coil motor.

  When performing the center position adjustment setting of the digital camera 100 having the above-described configuration, the adjustment setting mode is selected to activate each unit. Then, a predetermined subject is photographed as in the first embodiment, and the optical axis position of the photographing lens is extracted based on this photographed image. When the optical axis position CL is deviated from the photographing screen center O, the system control unit 105 moves the CCD 101 so that the optical axis position CL coincides with the photographing screen center O (the positional deviation is eliminated). That is, the value of the current supplied to the actuator 103 is changed according to the position of the CCD 101, and the CCD 101 is gradually moved so that the optical axis position CL coincides with the photographing screen center O. The system control unit 105 stores the current value to be supplied to the actuator 103 at this time in the information amount storage unit 106 as electrical signal information at the center position. When the adjustment setting mode is completed, the respective units are stopped, the power supply to the actuator 103 is stopped, and the CCD 101 is in a state before adjustment.

  The operation of the above configuration will be described with reference to the flowchart of FIG. When shooting with the digital camera 100, first, the shooting mode is selected and the power is turned on, and each unit is activated. When the system control unit 105 in the activated state confirms that the shooting mode is selected, the system control unit 105 reads the electrical signal information of the center position from the information amount storage unit 106 and executes the center position adjustment process. That is, the system control unit 105 drives the actuator 103 based on the read current value. As a result, the CCD 101 moves, and the center of the photographing screen of the CCD 101 coincides with the optical axis position of the photographing lens 13. Thereafter, photographing processing, camera shake detection, camera shake correction processing, and the like are executed based on the state in which the center position adjustment processing is performed as a reference. When framing is performed while viewing the through image displayed on the LCD 20 and the shutter button 16 is pressed halfway, detection of camera shake by the system control unit 105 and camera shake detection units 48 and 49 is started. When the shutter button 16 is fully pressed, shooting is performed while correcting camera shake, and a subject image is captured to obtain an image.

  In the second embodiment, similarly to the first embodiment, the driving current value of the actuator 103 corresponding to the center position is obtained for each zoom position, or the center positions of the tele end and the wide end are adjusted. Any of the configurations in which the driving current value of the actuator 103 at each zoom position is obtained by linear interpolation can be combined.

  The third embodiment of the present invention described below exemplifies a configuration that further improves the accuracy of center position adjustment by improving the output accuracy of a position sensor that detects the position of a correction lens or an image sensor. In the present embodiment, as in the first embodiment, the center position of the correction lens is changed to deflect the optical path of the photographing lens to perform camera shake correction, and position detection for detecting the position of the correction lens. The configuration other than the part is the same as in the first embodiment. FIG. 17 shows the configuration of the position detection unit to which this embodiment is applied. The position detection unit 110 includes a Hall element 111, a Hall element driving unit 112, a differential amplifier 113, a constant current source 114, a bias voltage setting unit 115, resistors 116 to 118, a capacitor 119, and the like. The hall element driving unit 112 is connected to one of the input terminal and the output terminal of the hall element 111. When the output signal from the hall element driving unit 112 is input to one input terminal of the hall element 111, the hall element 111 is driven. A constant current source 114 is connected to the other input terminal of the Hall element 111. As in the first embodiment, the output of the hall element 111 varies depending on the distance from the magnet 53 provided in the lens frame 50. The differential amplifier 113 receives the output from the other output terminal of the Hall element 111 and the bias voltage, and differentially amplifies and outputs the result.

  In the present embodiment, the bias voltage value set by the bias voltage setting unit 115 can be varied under the control of the system control unit 120. The system control unit 120 controls each unit of the digital camera, as in the first and second embodiments. The system control unit 120 changes the bias voltage value, thereby changing the offset amount of the amplified signal output from the differential amplifier 113. As a result, the output accuracy of the position detector 110 can be adjusted. The amplified signal output from the differential amplifier 113 of the position detection unit 110 is converted into a digital signal by the A / D converter 122 and input to the system control unit 120.

  In the present embodiment, another position detection unit having the same configuration as that of the position detection unit 110 is provided, and the position of the correction lens 13c in the X and Y directions is detected as in the first embodiment.

  A method of adjusting the output accuracy of the position detection unit 110 having the above configuration will be described with reference to the flowchart of FIG. When this adjustment is performed, first, the digital camera is activated so that an arbitrary image can be taken. Then, the VCM driving circuit 68 is controlled to drive the VCMs 48 and 49 to move the correction lens 13c from one end to the other end of the moving range. An output signal of the position detection unit 110 when the correction lens 13c is moved from one end to the other end is input to the system control unit 120.

  The system control unit 120 is an average value of the output signals (pre-adjustment signals) Vmax and Vmin of the position detection unit 110 at the upper and lower positions of the movement range of the correction lens 13c in a state before adjustment in which the position detection unit 110 is adjusted. Va is calculated. Further, the system control unit 120 stores in advance a center value Vc of an output signal range (a dotted line range) that can be converted by the AD converter 122, and the average value of the output signal range and the position detection unit described above. A difference value Vd from the average value of the output signal (pre-adjustment signal) is calculated. The system control unit 120 that has calculated the difference value Vd has the value of the output signal at the upper end of the moving range out of the output signals of the position detecting unit 110 at the upper and lower ends of the moving range of the correction lens 13c described above. In addition, the offset amount of the position detection unit 110 is adjusted by changing the bias voltage value so that the reference value is obtained by adding the difference value Vd. As a result, the output signal of the position detection unit 110 substantially coincides with the convertible range of the A / D converter 121 as shown in FIG. Since the A / D converter 121 can perform digital conversion with accuracy near the center value of the convertible range, it can be converted into a digital signal with high accuracy by performing the adjustment described above. Further, since the accuracy of the position detection unit is further improved, the accuracy of the position detection of the correction lens 13c is reflected in the position adjustment. Therefore, the center position adjustment for matching the optical axis of the digital camera and the imaging range of the image sensor is performed. Accuracy is improved.

  In this example, the value of the output signal at the upper end of the movement range of the correction lens 13c is made to coincide by adjusting the bias voltage value, but this is not limiting, and the lower end of the movement range of the correction lens 13c is made to coincide. Also good.

  Further, in the third embodiment, the case where the center position adjustment is performed by moving the position of the correction lens has been described as an example. However, in the configuration in which the center position adjustment is performed by moving the position of the image sensor, The present invention can also be applied to a position detection unit that detects the position of the sensor. In this case, the accuracy of position detection of the image sensor is improved, so that the accuracy of center position adjustment is also improved.

  In the first to third embodiments, the center position between the optical axis of the photographing lens and the center of the photographing screen of the image sensor at a plurality of zoom positions in the movement range of the zoom lens or at two positions of the tele end and the wide end. Each adjustment is performed, but the present invention is not limited to this, and in the fourth embodiment of the present invention described below, the center position adjustment of a digital camera capable of performing the adjustment process in a simpler procedure. A method will be described. In this embodiment, the configuration of each part of the digital camera is the same as that in the first embodiment.

  When the adjustment setting is performed by applying this embodiment, the same marking images are taken at the tele end position and the wide end position. The image shown in FIG. 20 is used as a predetermined marking image photographed with this adjustment setting. This image has a shape in which tip portions having the same length and angle are arranged radially at equal angular intervals. It should be noted that the adjustment setting image in the present embodiment may be any shape as long as the center and size of the figure can be easily discriminated. For example, as shown in FIG. 21, a horizontal line and a vertical line are aligned with the center of the circle. A shape in which the intersections are located, a star shape in which the positions of the vertices are equiangularly spaced as shown in FIG. 22, or an image in which a gradation pattern in which the density gradually changes from the center toward the periphery may be used. .

  Then, the housing of the digital camera is moved up and down and left and right at the tele end and wide end positions, and the above image is taken by the CCD. Then, the system control unit 26 extracts the movement locus of the center position of the image at the tele end position and the wide end position from these captured images.

  When adjustment setting is performed by applying the present embodiment, first, the digital camera is set to the adjustment setting mode, and each unit is set in an activated state. Then, the zoom lens 13a is first moved to the wide end, and then the center position of the correction lens 13c is adjusted. As the center position adjustment at this time, the position adjustment setting process and the position alignment process of the first embodiment are continuously performed. When the center position adjustment at the wide end position is completed, the system control unit 26 captures and registers the above-described marking image with the center position adjusted at the wide end.

  Then, the imaging of the marking image is continued while the camera case is intentionally shaken at the wide end position so that the case of the digital camera shakes up and down, right and left, that is, along the X and Y directions. At this time, as a shake amount given to the camera body, a shake is given so that the correction lens moves from the upper limit to the lower limit of the movement range when the shake is canceled. By giving this camera shake, the digital camera performs the camera shake correction by moving the correction lens 13c by the movement amount corresponding to the detected camera shake amount to deflect the optical path of the photographing lens 13. Then, by performing the camera shake correction, as shown in FIG. 24, data Dw of the movement trajectory of the marking image that moves in the screen is acquired. The system control unit 26 temporarily stores the data of the movement trajectory. In FIG. 24, the movement trajectory of the center of the marking image is shown for easy comparison.

  Next, the system control unit 26 moves the zoom lens 13a to the telephoto end, and performs imaging while obtaining a camera shake at the telephoto end position, and acquires the movement locus Dt of the marking image. Then, the movement trajectories Dw and Dt of the marking images acquired at the wide end position and the tele end position are compared. As shown in FIG. 24 (A), when there is a position where the movement locus at the wide end position and the movement locus at the tele end position intersect, that is, the centers of the other movement range are located in one movement range. It will be that. In addition, as shown in FIG. 24B, when the centers of the movement trajectories are coincident, the centers of the movement ranges are also coincident. Therefore, the system control unit 26 calculates the shift amount of the center position of the movement locus, and moves the correction lens 13c so that the center position of the correction lens 13c at the tele end position coincides with the center position of the correction lens 13c at the wide end position. The position is adjusted, and the bias voltage value at that time is stored. At zoom positions other than the wide end position and the tele end position, the bias voltage values adjusted respectively at the tele end position and the wide end position are used to obtain a proportional relationship between the tele end position and the wide end position. The bias voltage value at each zoom position is determined and written to the bias storage unit. In this way, the center position is adjusted and set only at one position on the wide end. By adjusting the tele-end adjustment setting to the setting, the entire adjustment setting can be performed. Therefore, the adjustment procedure is further reduced as compared with the above-described embodiment, and the labor of the operation can be reduced.

  In the first to fourth embodiments, the CCD is exemplified as the image sensor. However, the present invention is not limited to this, and other image sensors such as a CMOS may be used. Further, the position detection means is not limited to the one constituted by the Hall element described in the above embodiment, and another position detection sensor such as an optical sensor may be used.

  In the embodiment described above, a digital camera is taken as an example. However, the present invention is not limited to this, and a camera-equipped mobile phone or a camera may be used as a photographing apparatus incorporating the camera shake amount detection device of the present invention. An attached PDA may be used.

It is a perspective view which shows a digital camera from the front side. It is a perspective view which shows a digital camera from the back side. It is a block diagram which shows the electric constitution of a digital camera. It is a perspective view which shows the structure of the position detection part to which 1st Embodiment of this invention is applied, and a correction lens drive part periphery. It is a block diagram which shows the structure of the position detection part in 1st Embodiment. It is a block diagram which shows the structure of a camera shake detection part. It is a flowchart which shows the procedure of the adjustment setting mode in 1st Embodiment. It is explanatory drawing which shows the change of the image used for a center position adjustment process. It is a flowchart which shows the procedure of a center position adjustment process. It is a flowchart which shows the procedure of the imaging | photography mode in 1st Embodiment. It is a graph which shows the logarithmic relationship used for the linear interpolation calculation in the 1st modification of 1st Embodiment. It is a graph which shows the proportional relationship used for the linear interpolation calculation in the 2nd modification of 1st Embodiment. It is explanatory drawing which shows the change of the image used for a center position adjustment process in the 3rd modification of 1st Embodiment. It is a flowchart which shows the procedure when performing center position adjustment processing in the 3rd modification of 1st Embodiment. It is a block diagram which shows the electric constitution of the digital camera to which 2nd Embodiment is applied. It is a flowchart which shows the procedure of the imaging | photography mode in 2nd Embodiment. It is a block diagram which shows the structure of the position detection part to which 3rd Embodiment is applied. It is a flowchart when adjusting a position detection part in 3rd Embodiment. It is explanatory drawing which shows the displacement of the output value of a position detection part. It is a top view which shows an example of the marking image used in 4th Embodiment. It is a top view which shows another Example of the marking image used in 4th Embodiment. It is a top view which shows another Example of the marking image used in 4th Embodiment. It is a flowchart which shows the procedure when performing a center position adjustment process in 4th Embodiment. It is explanatory drawing which shows the change of the image used for center position adjustment processing in 4th Embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10,100 Digital camera 13,107 Shooting lens 13c Correction lens 26,105,120 System control part 48,49,102,110 Position detection part 46,47 Camera shake amount detection apparatus 51,52 Voice coil motor 54,111 Hall element 70 Bias Memory 103 Actuator

Claims (9)

Camera shake amount detection means for detecting the shake amount of the housing, a photographing optical system including a correction lens, an image sensor for photographing a subject image that has passed through the photographing optical system, and a position detection means for detecting the position of the correction lens And a drive means for moving the correction lens, and the drive means is controlled so that the position of the correction lens detected by the position detection means coincides with a target value corresponding to the shake amount detected by the camera shake amount detection means. a control means for canceling the camera shake, and a storage means for storing electrical signal information corresponding to the driving amount of the correcting lens by said drive means, said control means, the deflection is not the center position in the casing The position of the correction lens is moved by controlling the driving means so that the optical axis of the photographing optical system coincides with the photographing screen center of the image sensor. Serial advance an electric signal information is previously stored in the storage means, before photographing, the photographing apparatus which performs center position adjustment of the correction lens from said storage means reads out the electrical signal information,
The position detecting means outputs a signal having a value corresponding to the position of the correction lens, and amplifying means for amplifying the output signal from the position sensor and outputting an amplified signal to which a fixed offset amount is added. And a signal converting means for converting the amplified signal output from the amplifying means into an electric signal recognizable by the control means,
The amplifying unit includes an offset amount adjusting unit capable of adjusting the offset amount, and acquires an unadjusted signal obtained by measuring the amplified signal when the correction lens is positioned at one end and the other end of the moving range. The difference value between the average value of these pre-adjustment signals and the center value of the output signal range that can be converted by the signal conversion means is calculated, and the amplified signal at the one end or the other end is added to the pre-adjustment signal. The imaging apparatus , wherein the offset amount is adjusted to be a reference value obtained by adding difference values . A camera shake amount detecting means for detecting a shake amount of the housing, a photographing optical system, an image sensor for photographing a subject image that has passed through the photographing optical system, a position detecting means for detecting the position of the image sensor, and the image The driving means for moving the sensor and the position of the image sensor detected by the position detecting means are controlled so as to match the target value corresponding to the shake amount detected by the shake amount detecting means. and a control unit to cancel, and storage means for storing the electrical signal information corresponding to the driving amount of said image sensor by said drive means, said control means, the image sensor in the shake without central position in said housing The position of the image sensor is moved by controlling the driving means so that the center of the photographing screen coincides with the optical axis of the photographing optical system. It said electrical signal information for advance stored in advance in the storage means, before photographing, the photographing apparatus which performs center position adjustment of the image sensor from the storage means reads out the electrical signal information,
The position detecting means outputs a signal having a value corresponding to the position of the image sensor, and amplifying means for amplifying an output signal from the position sensor and outputting an amplified signal to which a fixed offset amount is added And a signal converting means for converting the amplified signal output from the amplifying means into an electric signal recognizable by the control means,
The amplifying unit includes an offset amount adjusting unit capable of adjusting the offset amount, and acquires an unadjusted signal obtained by measuring the amplified signal when the image sensor is positioned at one end and the other end of the moving range. The difference value between the average value of these pre-adjustment signals and the center value of the output signal range that can be converted by the signal conversion means is calculated, and the amplified signal at the one end or the other end is added to the pre-adjustment signal. The imaging apparatus , wherein the offset amount is adjusted to be a reference value obtained by adding difference values .   The photographing optical system includes a zoom lens mechanism capable of changing a zoom magnification, and the control unit adjusts a center position of the correction lens or the image sensor at a tele end position and a wide end position of the photographing optical system. To obtain the electrical signal information at the tele end position and the wide end position, and obtain the electrical signal information at a zoom position other than the tele end position and the wide end position by linear interpolation from the electrical signal information. The photographing apparatus according to claim 1 or 2, characterized in that Camera shake amount detection means for detecting the shake amount of the housing, a photographing optical system including a correction lens, an image sensor for photographing a subject image that has passed through the photographing optical system, and a position detection means for detecting the position of the correction lens And a drive means for moving the correction lens, and the drive means is controlled so that the position of the correction lens detected by the position detection means coincides with a target value corresponding to the shake amount detected by the camera shake amount detection means. and a control unit to cancel the camera shake, and a storage means for storing electrical signal information corresponding to the driving amount of the correcting lens by said drive means, said imaging optical system in the run-out without a central position in the casing The correction lens is moved by the driving means so that the optical axis of the image sensor coincides with the center of the photographing screen of the image sensor, and the electrical signal information at this time is acquired, and the recording An adjustment setting process to be stored in advance in the unit, and a lens position adjustment process in which the electrical signal information is read from the storage unit and the drive unit is driven based on the electrical signal information to adjust the position of the correction lens. In the adjustment method of the photographing device,
The position detecting means outputs a signal having a value corresponding to the position of the correction lens, and amplifying means for amplifying the output signal from the position sensor and outputting an amplified signal to which a fixed offset amount is added. And a signal converting means for converting the amplified signal output from the amplifying means into an electric signal recognizable by the control means,
The amplifying unit includes an offset amount adjusting unit capable of adjusting the offset amount, and acquires pre-adjustment signals obtained by measuring the amplified signals when the correction lens is positioned at one end and the other end of the moving range. The difference value between the average value of the pre-adjustment signal and the center value of the output signal range that can be converted by the signal conversion means is calculated, and the amplified signal at the one end or the other end is added to the pre-adjustment signal as the difference value. The adjustment method of the photographing apparatus , wherein the offset amount is adjusted so as to be a reference value obtained by adding . A camera shake amount detecting means for detecting a shake amount of the housing, a photographing optical system, an image sensor for photographing a subject image that has passed through the photographing optical system, a position detecting means for detecting the position of the image sensor, and the image The driving means for moving the sensor and the position of the image sensor detected by the position detecting means are controlled so as to match the target value corresponding to the shake amount detected by the shake amount detecting means. Control means for canceling, and storage means for storing electrical signal information corresponding to the drive amount of the image sensor by the drive means, and the center of the photographing screen of the image sensor in the center position without shaking in the housing The image sensor is moved by the driving means so that the optical axis of the photographing optical system coincides, and the electrical signal information at this time is acquired, An adjustment setting process that is stored in advance in a storage unit, and a lens position adjustment process that reads out the electrical signal information from the storage unit and drives the drive unit based on the electrical signal information to adjust the position of the image sensor. In the adjustment method of the photographing apparatus to be performed,
The position detecting means outputs a signal having a value corresponding to the position of the image sensor, and amplifying means for amplifying an output signal from the position sensor and outputting an amplified signal to which a fixed offset amount is added And a signal converting means for converting the amplified signal output from the amplifying means into an electric signal recognizable by the control means,
The amplifying unit includes an offset amount adjusting unit capable of adjusting the offset amount, and obtains signals before adjustment obtained by measuring the amplified signal when the image sensor is positioned at one end and the other end of the moving range. The difference value between the average value of the pre-adjustment signal and the center value of the output signal range that can be converted by the signal conversion means is calculated, and the amplified signal at the one end or the other end is added to the pre-adjustment signal as the difference value. The adjustment method of the photographing apparatus , wherein the offset amount is adjusted so as to be a reference value obtained by adding . Photographing apparatus according to claim 4 or 5, wherein the performing the correction lens or center position adjustment of the image sensor uniformly filled planar object was the state of the luminance distribution of the image taken by the image sensor Adjustment method. A planar object squares pattern has been formed from the distortion amount of the squares of the image photographed by the image sensor according to claim 4 or 5, wherein the performing center position adjustment of the correction lens or the image sensor Adjustment method of the photographing device. The photographing optical system includes a zoom lens mechanism capable of changing a zoom magnification, and adjusts a center position of the correction lens or the image sensor at a tele end position and a wide end position of the photographing optical system to adjust the tele end. The electrical signal information at the position and the wide end position is acquired, and from the electrical signal information, the electrical signal information at the zoom position other than the tele end position and the wide end position is obtained by linear interpolation, and stored in the storage unit The method for adjusting a photographing apparatus according to any one of claims 4 to 7, wherein the adjustment is stored. The photographing optical system includes a zoom lens mechanism capable of changing a zoom magnification, and adjusts a center position of the correction lens at a wide end position of the photographing optical system to acquire the electrical signal information, and the wide end position In the state where the center position adjustment at the end is completed and the case is shaken vertically and horizontally, the moving optical path of an image with an arbitrary marking is captured and acquired, and then the imaging optical system is The marking movement trajectory at the tele end position obtained by taking a picture in a state where the wide end position is changed to the tele end position and the housing is shaken vertically and horizontally is the marking end position of the marking at the wide end position. and controls the drive means to match the movement locus, and sets the electrical signal information at this time as electrical signal information in the telephoto end position, the tele Determined position and said electrical signal information at the zoom position other than the telephoto end position and the wide end position from the electrical signal information in the wide-angle end position by a linear interpolation operation, the these electrical signal information to be stored in said storage means The method of adjusting a photographing apparatus according to claim 4, wherein:

Images