JP2005136743A - Position adjusting instrument and position adjusting method for image pickup device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide the position adjusting device of an image pickup device and the position adjusting method of the image pickup device for calculating the optimal position of an image pickup device relative to an image pickup optical system, and for easily performing the adjustment with high precision, and shortening time to be spent on such adjustment. <P>SOLUTION: After an image pickup optical system 2 and an image pickup device 4 are temporarily positioned, either the image pickup optical system 2 or the image pickup device 4 is moved in an optical axial direction, and a chart 36 arranged on the optical axis is imaged at a plurality of predetermined positions so that image pickup information can be acquired. Then, on the basis of the image pickup information, the optimal position of the image pickup device 4 is calculated as for the distance between the image pickup optical system 2 and the image pickup device 4 in the optical axial direction, the deviation of the image pickup device 4 from the optical axis and the swing and tilt of the image pickup device 4. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an image sensor position adjustment device and a position adjustment method for adjusting an image sensor to an optimum position and fixing it with respect to an image pickup optical system.

  Adjustment of the relative positions of the imaging optical system constituted by a single lens or a plurality of lenses and an imaging device such as a CCD (Charge Coupled Device) directly affects the performance of the imaging apparatus in which these are incorporated. Therefore, it is an important work process.

  Conventionally, as a first adjustment method of the position of the image sensor with respect to the image pickup optical system, the dimensional accuracy is increased for each of the one holder holding the image pickup optical system and the other holder holding the image pickup element. Some of these holders can be positioned so that their optical axes coincide with each other within an allowable error range when these holders are combined.

  That is, as shown in FIG. 8, due to the dimensional accuracy of the holders (not shown) of the image pickup optical system 2 and the image pickup element 4, the displacement of the image pickup element 4 with respect to the optical axis of the image pickup optical system 2 (the distance x, The distance z) and the tilt angle θx of the image sensor 4 are made to coincide with each other within an allowable error range.

  Here, the tilt angle θx is a deviation of the angle between the optical axis direction of the imaging optical system 2 and the imaging direction of the imaging element 4. Further, the deviation x of the image pickup device 4 with respect to the optical axis of the image pickup optical system 2 and the tilt angle θx of the image pickup device 4 also occur in the depth direction of the drawing in FIG. 8, but are parallel to the drawing for the sake of simplicity. Only the shift x and the tilt angle θx of the image sensor 4 in various directions are shown.

  Further, the adjustment of the distance of the image pickup device 4 from the image pickup optical system 2 in the optical axis direction of the image pickup optical system 2 can move either the image pickup optical system 2 or the image pickup device 4 in the optical axis direction. Such an apparatus (not shown) was used.

  That is, while the chart 6 on which a plane figure (not shown) for mutual position adjustment is drawn is projected on the imaging device 4 through the imaging optical system 2, either the imaging optical system 2 or the imaging device 4 is moved in the optical axis direction. By moving, adjustment is performed while confirming both the position of the image sensor 4 in the optical axis direction and the image of the chart 6 imaged on the image sensor 4 so that the image of the chart 6 is imaged on the image sensor 4. Was.

  In addition, as a second adjustment method different from the first adjustment method, a holder or the like as in the first adjustment method is used to remove the deviation of the image pickup element 4 from the optical axis of the image pickup optical system 2. There is an adjustment method in which the position is adjusted by moving the image pickup device 4 on a plane orthogonal to the optical axis of the image pickup optical system 2 instead of positioning each other.

  Although this adjustment method is not shown, when the chart 6, the imaging optical system 2 and the imaging device 4 are temporarily arranged on a substantially straight line and then the chart 6 is projected on the imaging device 4 through the imaging optical system 2, this imaging optical system is used. By moving 2 in the optical axis direction and changing the focus, when the chart 6 imaged on the image sensor 4 is enlarged or reduced, a fixed point that becomes the center is obtained.

  Since this fixed point exists on the optical axis of the imaging optical system 2, the image sensor 4 is moved on a plane orthogonal to the optical axis of the imaging optical system 2 so as to remove the deviation from the fixed point. It was.

  Further, in such a second adjustment method, after adjusting to remove the deviation of the imaging element 4 with respect to the optical axis of the imaging optical system 2, an adjustment method similar to the first adjustment method or another adjustment method is used. The distance between the image pickup optical system 2 and the image pickup device 4 in the optical axis direction is adjusted, and the tilt of the image pickup device 4 is adjusted while checking the chart 6 imaged on the image pickup device 4.

  Further, after the position of the image sensor 4 is adjusted by the conventional first and second adjustment methods as described above, it is necessary to prevent the position of the adjusted image sensor 4 from being shifted.

Therefore, as shown in FIG. 9, the imaging element 4 is supported by a bellows-shaped fixing member 8 formed so as to be hollow with a soft material that transmits ultraviolet rays. After adjusting the position, there was a method of injecting an ultraviolet curable resin adhesive into the inside of the fixing member 8 and irradiating and curing the ultraviolet ray so that the position of the imaging element 4 is not shifted (for example, Patent Document 1).
JP 7-63965 A

  However, in the conventional image sensor position adjustment method and the position adjustment device used in these image sensor position adjustment methods as described above, the distance of the image sensor from the image pickup optical system in the optical axis direction, image pickup optics, and the like. There is a problem in that it takes a lot of time to make all adjustments because the displacement x of the image sensor with respect to the optical axis of the system and the tilt angle θx of the image sensor cannot be adjusted simultaneously.

  Further, along with recent downsizing and higher performance of image sensors, such image sensor position adjustment methods and position adjustment devices used in these position adjustment methods are adjusted with further improved accuracy. There is a problem that the time spent for adjustment may increase.

  Therefore, in view of the above problems, the present invention can calculate the optimum position of the image pickup element with respect to the image pickup optical system and can easily perform the adjustment with high accuracy and reduce the time spent for such an adjustment. An object of the present invention is to provide a position adjusting device and a position adjusting method for an image sensor that can be used.

In order to solve the above-described problems, an image sensor position adjusting device according to the present invention includes:
After temporarily arranging the imaging optical system and the imaging device, imaging information is obtained by imaging a chart arranged on the optical axis at a plurality of predetermined positions while moving either the imaging optical system or the imaging device in the optical axis direction. Get
Based on the imaging information, an optimal position is calculated for the distance of the imaging element from the imaging optical system in the optical axis direction, the deviation of the imaging element with respect to the optical axis, and the tilt angle of the imaging element. Is.

  The image sensor position adjusting apparatus according to the present invention simultaneously adjusts the distance of the image sensor from the image pickup optical system in the optical axis direction, the shift of the image sensor relative to the optical axis, and the tilt angle of the image sensor. It is characterized by doing so.

  The image sensor position adjustment apparatus according to the present invention may calculate the optimum position of the image sensor and perform the adjustment before actually performing the adjustment, or after calculating the optimum position and before performing the adjustment. When the image pickup device is adjusted, the image pickup optical system determines whether the image can be formed on the image pickup device so as to satisfy the predetermined requirement based on the image pickup information. It is characterized by.

  In addition, the image sensor position adjustment apparatus according to the present invention is configured to perform a verification test as to whether or not a predetermined performance is obtained by imaging the chart after adjusting the imaging optical system or the image sensor to an optimum position. It is characterized by that.

  The image sensor position adjusting apparatus according to the present invention is characterized in that the imaging information is reacquired when it is determined that a predetermined performance is not obtained by the confirmation inspection.

  The image sensor position adjusting apparatus according to the present invention is characterized in that the optimum position of the image sensor is calculated based on information on contrast, edge or resolution of the image information. .

  In the image sensor position adjusting apparatus according to the present invention, the range in which either the image pickup optical system or the image pickup element moves in the optical axis direction to acquire the image pickup information is the same as the image pickup optical system and the image pickup device. It is characterized in that it is within an allowable error range with respect to the target value of the mutual distance of the elements.

An image sensor position adjusting device according to the present invention includes:
An image pickup device position adjusting device capable of arranging an image pickup optical system and an image pickup device,
Moving means for moving either the imaging optical system or the imaging element in the optical axis direction;
Photographing signal processing means for obtaining photographing information from the image sensor;
Movement amount acquisition means for acquiring movement information corresponding to the movement amount by the movement means;
Optimal position acquisition means for acquiring information corresponding to the optimal position of the imaging element from outputs of the imaging signal processing means and the movement amount acquisition means;
And an optimum position moving means for moving the imaging element to the optimum position by the output of the optimum position acquisition means.

The image sensor position adjustment method according to the present invention includes:
After the image pickup optical system and the image pickup device are temporarily arranged, an image of a chart arranged on the optical axis at a plurality of predetermined positions while moving either the image pickup optical system or the image pickup device in the optical axis direction of the image pickup optical system is picked up. To obtain imaging information,
Based on the imaging information, an optimal position is calculated for the distance of the imaging element from the imaging optical system in the optical axis direction, the deviation of the imaging element with respect to the optical axis, and the tilt angle of the imaging element. Is.

  According to the position adjustment apparatus and position adjustment method for an image sensor according to the present invention, the optimum position of the image sensor with respect to the image pickup optical system can be calculated, and the adjustment can be easily performed with high accuracy. The time spent on making adjustments can be reduced.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of an image sensor position adjusting apparatus and a position adjusting method according to the present invention will be specifically described with reference to the drawings.

  FIGS. 1 to 7 are diagrams which are referred to for explaining a position adjustment device 20 (corresponding to an image pickup device position adjustment device) and an image pickup device position adjustment method according to an embodiment of the present invention.

  As shown in FIG. 1, the position adjustment device 20 includes an adjustment mechanism unit 22, an adjustment mechanism driving circuit 24 as a moving means and an optimum position moving means, an imaging signal processing circuit 26 as a photographing signal processing means, a monitor 28, an optimum position. An arithmetic circuit 30 as an acquisition unit and a movement amount acquisition unit 32 are provided. Further, the position adjusting device 20 can fix the imaging optical system 2 to a holder (not shown) at a predetermined position, and a chart 36 arranged on the optical axis of the imaging optical system 2 is displayed. I have.

  As shown in FIG. 2, on the chart 36, adjustment figures 38 and 40 for measuring the contrast, edge, resolution, etc. are drawn at the four corners and the center as a two-dimensional figure for mutual position adjustment. It is. An XY adjustment marker 42 is drawn at an intermediate position between the adjustment graphic 38 and the adjustment graphic 40.

  As shown in FIG. 1, the adjustment mechanism unit 22 can hold the imaging device 4, and the imaging device 4 projects a chart 36 through the imaging optical system 2.

  The adjustment mechanism unit 22 and the adjustment mechanism drive circuit 24 function as a moving unit for the image sensor 4, and the adjustment mechanism unit 22 moves the image sensor 4 to the imaging optical system 2 based on a signal output from the adjustment mechanism drive circuit 24. The position of the optical axis of the imaging optical system 2 can be adjusted and the tilt angle θx with respect to the optical axis of the imaging optical system 2 can be adjusted. In addition, it can be rotated.

  The movement amount acquisition means 32 detects the position of the image pickup device 4 when the adjustment mechanism 22 moves the image pickup device 4 in the optical axis direction of the image pickup optical system 2. Is output to the arithmetic circuit 30.

  In the present embodiment, the image sensor 4 is moved in the optical axis direction in this way to detect the position of the image sensor 4 in the optical axis direction. However, this embodiment is different from the present embodiment. As another embodiment, as shown in FIG. 3, an imaging system position adjusting unit 34 as a moving means for moving the imaging optical system 2 in the optical axis direction is provided, and the moving amount of the imaging optical system 2 in the optical axis direction is provided. May be detected by the movement amount acquisition means 32 and output to the arithmetic circuit 30.

  Here, in the following description of the present embodiment, the optical axis direction of the imaging optical system 2 is referred to as the Z-axis direction as shown in FIG. Further, among the directions perpendicular to the Z axis, a direction parallel to the paper surface in FIG. 1 is referred to as an X axis direction, and a direction perpendicular to the paper surface is referred to as a Y axis direction. Further, the tilt angle of the image pickup device 4 generated at an angle parallel to the paper surface is represented by θx, and the tilt angle generated at an angle in a plane perpendicular to the paper surface in a direction perpendicular to the surface including the tilt angle θx and the Z axis is defined as θx. This is expressed as θy. In FIG. 1, the Y axis and the tilt angle θy are not shown.

  The imaging signal processing circuit 26 is configured to receive an output signal from the imaging element 4. The imaging signal processing circuit 26 creates imaging information based on this output signal. The imaging information is output to the monitor 28 and the arithmetic circuit 30.

  The arithmetic circuit 30 is based on the imaging information when the imaging device 4 images the chart 36 at a plurality of predetermined positions in the Z-axis direction, and the deviation in the X-axis direction of the imaging device 4 with respect to the optical axis of the imaging optical system 2, Y Axial deviations and tilt angles θx and θy are calculated. Further, based on the output from the movement amount acquisition means 32, the optimum distance of the image pickup element 4 from the image pickup optical system 2 in the Z-axis direction is also calculated at the same time.

  For example, when the imaging device 4 is fixed to the adjustment mechanism unit 22, as shown in FIG. 4, the imaging device 4 has a deviation in the X-axis direction with respect to the optical axis of the imaging optical system 2 and a tilt angle θx. Suppose that Here, the displacement in the Y-axis direction and the tilt angle θy are not considered in order to simplify the description.

  When the adjustment mechanism unit 22 is operated and the image sensor 4 is moved in such a direction as to approach the image pickup optical system 2 along the Z axis, the points 4a, 4b, As shown in FIG. 5, the contrast of the image projected by each of 4c gradually increases and gradually decreases.

  As shown in FIG. 3, the point 4a on the image pickup device 4 is located closer to the image pickup optical system 2 than the points 4b and 4c due to the tilt angle θx. The contrast of 4a reaches its maximum value faster than points 4b and 4c. Further, the contrast of the point 4b reaches the maximum value faster than the point 4c.

  Further, for each point 4a, 4b, 4c on the image sensor 4, the position in the Z-axis direction where the contrast reaches the maximum value can be grasped. The state of these changes can be obtained from the imaging information output from the adjustment mechanism unit 22 and the output value of the movement amount acquisition means 32.

  Further, the deviation in the X-axis direction of the image sensor 4 can be grasped based on which pixel of the image sensor 4 is imaging the XY adjustment marker 42 shown in FIG.

  Accordingly, the arithmetic circuit 30 determines the difference in the output of the points 4a, 4b, and 4c on the image sensor 4 as described above from the imaging information, and which pixel in the image sensor 4 is imaging the XY adjustment marker 42. As shown in FIG. 6, the X-axis direction shift and tilt angle θx of the image sensor 4 are corrected and the contrast of the image sensor 4 in the Z-axis direction becomes the maximum value. Such an optimal position can be calculated.

  Further, even in the configuration of the position adjusting device 20 shown in FIG. 3 shown as another embodiment different from the present embodiment, the imaging optical system 2 is moved in the Z-axis direction instead of the imaging device 4. As a result, the arithmetic circuit 30 can calculate the optimum position of the image sensor 4.

  Next, based on FIG.1 and FIG.7, the operation | movement which adjusts the position of the image pick-up element 4 with the position adjustment apparatus 20 which concerns on this Embodiment is demonstrated.

  First, as shown in FIG. 1, the imaging device 4 that has been confirmed to operate normally is attached to the adjustment mechanism unit 22, and the imaging optical system 2 is fixed to a predetermined position of the position adjustment device 20. .

  When the image pickup optical system 2 and the image pickup element 4 are attached to the position adjustment device 20, the image pickup element 4 is moved within a certain range so as to approach the image pickup optical system 2 along the Z axis by the adjustment mechanism unit 22. It has become. The certain range in which the image sensor 4 moves is set to be within an allowable error range with respect to the target value of the distance between the image pickup optical system 2 and the image sensor 4 or within an allowable error range.

  The imaging element 4 images the chart 36 at a plurality of predetermined positions while moving in the Z-axis direction, and outputs the imaging signal. The imaging signal from the imaging element 4 is converted into imaging information by the imaging signal processing circuit 26, and this imaging information is output to the monitor 28 and the arithmetic circuit 30.

  When the arithmetic circuit 30 receives all of the imaging information corresponding to a plurality of predetermined positions in the Z-axis direction, the arithmetic circuit 30 performs the following operation as shown in the flowchart of FIG.

  First, the arithmetic circuit 30 receives all of the imaging information (step S1) and then performs such imaging before actually calculating and adjusting the optimum position of the imaging device 4 in steps S4 and S5 described later. When the element 4 is adjusted, the imaging optical system 2 has a predetermined performance that can make the contrast clearer than a certain level when the chart 36 is imaged on the imaging element 4. It is determined based on the imaging information (step S2).

  When the imaging optical system 2 does not have the predetermined performance (NO in step S2), such an imaging optical system 2 is determined as a defective product (step S3).

  Here, not only the case where the imaging optical system 2 is determined to be a defective product is caused by the imaging optical system 2 but also the operation of the position adjusting device 20 may be a cause, Returning immediately before step S1, the series of operations is repeated once again (step S8).

  After the series of operations up to this point is performed, if it is determined again as a defective product in step S2 (NO in step S2), the product is discharged as a defective product in step S8 through step S3. (NO in step S8).

  In step S2, if the imaging optical system 2 has a predetermined performance (YES in step S2), the arithmetic circuit 30 determines the optimum of the imaging element 4 based on the imaging information received in step 1. The position is calculated (step S4).

  Next, in order to adjust the image sensor 4 to the optimum position, the arithmetic circuit 30 sends signals of adjustment movement amounts for the X-axis direction, the Y-axis direction, the Z-axis direction, and the tilt angles θx and θy to the adjustment mechanism drive circuit 24. Output (step S5). The adjustment mechanism drive circuit 24 operates the adjustment mechanism unit 22 based on the adjustment movement amount signal to adjust the image sensor 4 to the optimum position.

  After adjusting the image sensor 4 to the optimum position, the position adjusting device 20 performs a check inspection to check whether the combination of the image pickup optical system 2 and the image sensor 4 has a predetermined performance by this adjustment. (Step S6). This confirmation inspection is determined based on whether or not the contrast of the chart 36 imaged by the image sensor 4 adjusted to the optimum position is equal to or higher than a certain value (step S7).

  When the contrast is equal to or higher than a certain value (OK in step S7), the position adjustment of the image pickup device 4 with respect to the image pickup optical system 2 is finished, and the image pickup optical system 2 and the image pickup device 4 are relative to each other. The process is moved to modularization with the position fixed.

  In step S7, when the contrast is equal to or less than a certain value (not OK) (NO in step S7), not only the case where the cause is the imaging optical system 2 or the imaging element 4, but also the position adjusting device. Since there may be a case where it is caused by an operation failure 20 or the like, the process returns to immediately before step S1 and the series of operations up to step S7 is performed again only once (step S8).

  According to the position adjustment device 20 and the position adjustment method of the image pickup device 4 according to this embodiment, the optimum position of the image pickup device 4 with respect to the image pickup optical system 2 is calculated, and the adjustment is easily performed with high accuracy. And the time spent on such adjustments can be reduced.

  Further, the distance of the image sensor 4 from the imaging optical system 2 in the optical axis direction, the shift x of the image sensor 4 in the direction perpendicular to the optical axis, and the tilt angle θx of the image sensor 4 are simultaneously adjusted to the optimum positions. can do.

  Further, when the imaging optical system 2 does not have a predetermined performance, it can be discharged as a defective product before calculating and adjusting the optimum position of the imaging device 4.

  In addition, after the image pickup device 4 is adjusted to the optimum position, whether or not the combination of the image pickup optical system 2 and the image pickup device 4 has a predetermined performance is checked so that reliability can be improved. it can.

  Further, even if it is determined that such a confirmation inspection is performed and the predetermined performance is not obtained, the imaging information is acquired again and the imaging element 4 is adjusted to the optimum position. When the image pickup device 2 and the image sensor 4 are non-defective products, they are not wasted.

  In the present embodiment, the imaging circuit 4 is moved with respect to the stationary imaging optical system 2 in order for the arithmetic circuit 30 to acquire imaging information. However, as shown in FIG. The image pickup optical system 2 may be moved with respect to the image pickup element 4 to be operated.

  Further, in the present embodiment, in step S2 of the flowchart shown in FIG. 6, such adjustment of the image sensor 4 is performed before the optimum position of the image sensor 4 is calculated and adjusted in step S4. In such a case, the imaging optical system 2 determines whether or not the imaging optical system 2 has a predetermined performance that can clarify the contrast of the chart 36 imaged on the imaging device 4 more than a certain level. However, instead of such contrast, the determination may be made based on the edge indicating the sharpness of the light / dark boundary of the captured image, the resolution, or the like.

  In the present embodiment, when the arithmetic circuit 30 calculates the optimum position of the image sensor 4 in step S4 of the flowchart, the calculation is performed based on the contrast in the imaging information. The calculation may be based on the edge or resolution.

  In this embodiment, after determining whether or not the imaging optical system 2 has a predetermined performance in step S2 of the flowchart, the arithmetic circuit 30 determines the optimum position of the imaging element 4 in step S4. However, after the arithmetic circuit 30 calculates the optimum position of the image sensor 4, it may be determined whether or not the imaging optical system 2 has a predetermined performance.

  The confirmation inspection performed in steps S6 and S7 in the flowchart is determined based on whether or not the contrast of the chart 36 imaged by the imaging device 4 adjusted to the optimum position is equal to or higher than a certain value. The determination may be made based on the edge or whether the resolution is a certain value or more.

  In the present embodiment, the case where the present invention is applied to a combination of an image pickup optical system and an image pickup element used in a single-plate type image pickup apparatus having only one image pickup element has been described, but based on the same technical idea. The present invention may be applied to a combination of an image pickup optical system and an image pickup element used in a three-plate type or four-plate type image pickup apparatus having a plurality of image pickup elements.

It is a conceptual diagram which shows the structure of the position adjustment apparatus 20 which concerns on one embodiment of this invention. It is a front view of the chart 36 shown in FIG. It is a conceptual diagram which shows the structure of the position adjustment apparatus 20 which concerns on another embodiment different from one embodiment of this invention. FIG. 2 is an enlarged side view showing an imaging optical system 2, an imaging element 4 and a chart 36 shown in FIG. It is a diagram which shows an example of the change of the contrast of the points 4a, 4b, 4c before adjustment of the image pick-up element 4 shown in FIG. It is a diagram which shows the change of the contrast of the points 4a, 4b, 4c after adjustment of the image pick-up element 4 shown in FIG. 3 is a flowchart showing an operation procedure of a circuit calculation unit 30 shown in FIG. It is a side view which shows the position adjustment method of the image pick-up element 4 in the past. It is a side view which shows the fixing method of the image pick-up element 4 in the past.

Explanation of symbols

DESCRIPTION OF SYMBOLS 2 Imaging optical system 4 Image pick-up element 4a, 4b, 4c Each point of the image pick-up element 4 6 Chart 8 Fixing member 20 Position adjustment apparatus 22 Adjustment mechanism part 24 Adjustment mechanism drive circuit 26 Imaging signal processing circuit 28 Monitor 30 Calculation circuit 32 Movement amount acquisition Means 34 Image pickup system position adjustment unit 36 Chart 38, 40 Adjustment graphic 42 XY adjustment marker

Claims (9)

After temporarily arranging the imaging optical system and the imaging device, imaging information is obtained by imaging a chart arranged on the optical axis at a plurality of predetermined positions while moving either the imaging optical system or the imaging device in the optical axis direction. Get
Based on the imaging information, an optimal position is calculated for the distance of the imaging element from the imaging optical system in the optical axis direction, the deviation of the imaging element with respect to the optical axis, and the tilt angle of the imaging element. Image sensor position adjustment device.   2. The image pickup device according to claim 1, wherein a distance of the image pickup device from the image pickup optical system in the optical axis direction, a shift of the image pickup device with respect to the optical axis, and a tilt angle of the image pickup device are adjusted simultaneously. Positioning device.   The imaging optical when the image sensor is adjusted before the calculation and adjustment of the optimum position of the image sensor or after the calculation of the optimum position and before the adjustment is actually performed. The image sensor position adjusting apparatus according to claim 2, wherein whether or not the system can image the chart on the image sensor so as to satisfy a predetermined requirement is determined based on the imaging information.   The imaging device according to any one of claims 1 to 3, wherein a confirmation test is performed as to whether or not a predetermined performance is obtained by imaging the chart after adjusting the imaging device to an optimal position. Position adjustment device.   The image sensor position adjustment apparatus according to claim 4, wherein the imaging information is acquired again when it is determined that the predetermined performance is not obtained by the confirmation inspection.   The image sensor position adjustment apparatus according to claim 1, wherein an optimum position of the image sensor is calculated based on any one of the contrast, edge, and resolution of the image information.   The range in which either the image pickup optical system or the image pickup element moves in the optical axis direction to acquire the image pickup information is within an allowable error range with respect to the target value of the distance between the image pickup optical system and the image pickup element. The position adjusting device for an image sensor according to any one of claims 1 to 6, wherein: An image pickup device position adjusting device capable of arranging an image pickup optical system and an image pickup device,
Moving means for moving either the imaging optical system or the imaging element in the optical axis direction;
Photographing signal processing means for obtaining photographing information from the image sensor;
Movement amount acquisition means for acquiring movement information corresponding to the movement amount by the movement means;
Optimal position acquisition means for acquiring information corresponding to the optimal position of the imaging element from outputs of the imaging signal processing means and the movement amount acquisition means;
An image sensor position adjustment apparatus, comprising: an optimum position moving means for moving the imaging element to an optimum position by an output of the optimum position acquisition means. After temporarily arranging the imaging optical system and the imaging device, imaging information is obtained by imaging a chart arranged on the optical axis at a plurality of predetermined positions while moving either the imaging optical system or the imaging device in the optical axis direction. Get
Based on the imaging information, an optimal position is calculated for the distance of the imaging element from the imaging optical system in the optical axis direction, the deviation of the imaging element with respect to the optical axis, and the tilt angle of the imaging element. Image sensor position adjustment method.

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