JPS6139169A - Image sensor adjusting device - Google Patents

Abstract

PURPOSE:To simplify adjustment of position of an image sensor and to adjust position with high accuracy by providing a device that shifts the image sensor to be adjusted in all directions with respect to an image sheet for adjusting. CONSTITUTION:A stage mechanism section 10 is provided in an image sensor adjusting device and the image sensor 11 to be adjusted is moved by the mechanism section 10 in the X direction, Y direction, Z direction and Ye, Ze directions for Y, Z directions with respect to a sheet 12 for adjusting. An adjusting chart is recorded beforehand in the sheet 12, and fixed to a rotation mechanism section 13 at the reading position to the sensor 11. A controlling section 15 is provided in an adjustment controlling section 14 and outputs from the sensor 11 are amplified and digitalized by an input port 16 connected to the controlling section 15 and added to the controlling section 15. The mechanism section 10 is controlled by outputs from the sensor 11 in a driving section 17. Thus, adjusting of position of the sensor 11 is made simply and with high accuracy.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to an image sensor adjustment device for adjusting the position of an image sensor used, for example, in OCR.

[Technical background of the invention and its problems] Generally, when an image sensor is attached to an optical character reader (OCR) or the like, it is necessary to adjust the position of the image sensor. Conventionally, when performing such positional adjustment, a method has generally been adopted in which an adjustment device is used which assumes the actual mounting position.

In such a method, an adjustment image sheet with an adjustment chart (usually a straight line) written on it is set in the reading section,
The output signal of the image sensor for this image sheet is measured. Specifically, the output signal of the image sensor is measured with a digital voltmeter or a synchroscope, and the position of the image sensor is manually adjusted using the measurement results.

However, with the adjustment method described above, when performing position adjustment of the image sensor, the operator repeats trial and error based on inaccurate positional relationships. Therefore, it takes a lot of time to adjust the position of the image sensor, and there is a problem in that the accuracy of the position increases when the image sensor is mounted, and as a result, the quality of OCR etc. deteriorates.

UObject of the Invention The present invention has been made in view of the above points, and its purpose is to provide an image sensor adjustment device that can easily and accurately adjust the position of an image sensor used in OCR, etc. It is about providing.

[Summary of the Invention] The present invention provides an image sensor adjustment device using an image sheet for adjustment, in which the image sensor to be adjusted is aligned with respect to the image sheet for adjustment in the front-rear direction, the left-right direction, the vertical direction, the left-right tilt direction with respect to the horizontal direction, and the vertical direction. A stage mechanism means is provided that moves in each direction of the front and rear tilting directions. The adjustment control means is configured to drive and control the stage mechanism means based on image data output from the image sensor to adjust the position of the image sensor.

With this configuration, the position of the image sensor can be automatically adjusted with high precision based on image data output from the image sensor.

[Embodiment of the Invention] An embodiment of the present invention will be described below with reference to the drawings. 1st
The figure is a schematic diagram showing the configuration of an image sensor adjustment device according to an embodiment. In FIG. 1, the stage mechanism section 1
o is the image sensor 11 to be adjusted with respect to the adjustment image sheet 12 in the left-right direction (X direction), 2 in the front-rear direction (Y direction).
It is composed of a positioning table for moving in the following directions: vertical direction (direction), vertical direction (Z direction), horizontal tilt direction (Yθ force direction), and vertical tilt direction (Zθ force direction).Adjustment The image sheet 12 has an adjustment chart recorded in advance, and is attached to the rotation mechanism section 13 at a reading position relative to the image sensor 11.

The adjustment control section 14 includes a control section 15 such as a microprocessor.
, the stage mechanism i! according to control signals from the input port 16 that amplifies and A/D converts the output signal of the image sensor 11 and the control unit 15. The drive unit 17 outputs a drive signal for driving and controlling the drive unit 9110. The control unit 15 executes position adjustment processing based on the image data output from the input port 16, and outputs a control signal to the drive unit 17 according to the processing result.

When the image sensor 11 is attached to the stage mechanism section 10, specifically, as shown in FIG. 2(a), the image sensor 11 is attached to the plate 1.
It is fixed at 8. Further, a lens block 19 is attached to the plate 18 at a position corresponding to the image sensor 11. That is, the image sensor 11 is installed in the stage mechanism section 10 in a state as shown in FIG. 2(b). Further, the stage mechanism section 10 is specifically illustrated in FIG. M3 (a), for example.

I of the structure shown in (b)! It consists of 1m. here,
Figure (a) is a side view, and figure (b) is a front view.

In the same figure (a'), the tables 20 to 22 move in the Y direction, the X direction, and the Z direction, respectively, and the stage 23°2
4 are configured to be stopped so as to move in the Yθ force direction and the ze direction. Furthermore, the rotation mechanism section 13 is specifically configured as shown in FIGS. 4(a) to 4(C), for example. Here, FIG. 5A is a plan view, FIG. 1B is a front view, and FIG. 1C is a side view.

In the adjustment device having such a configuration, the operation according to one embodiment will be explained. First, as shown in FIG. 5, the image sensor 11 is installed on a plate 18 mounted on a stage 24 that moves in the 2θ direction. At this time, lens block 1
9 is temporarily fixed at the position shown in FIG. Further, the adjustment image sheet 12 is set in the rotation mechanism section 13, and has a positional relationship with the image sensor 11 as shown in FIG.

In the above state, the adjustment control section 14 moves the Y-direction table 20 of the stage mechanism section 10 to the lens block 1.
9, and attach the lens block 19 to plate 1.
8 to temporarily fix it. Next, the adjustment control unit 14 controls the movement of the Y-direction table 20 and the Zθ-direction stage 24 to adjust the position of the image sensor 11 so that the lens block 19 is optimally focused. At this time, the adjustment image sheet 12 is being rotated by the rotation mechanism section 13, and a focus pattern necessary for focus adjustment is recorded.

Furthermore, the adjustment control unit 14 executes positional adjustments such as the tilt and center position of the image sensor 11 based on the image data from the image sensor 11.

That is, for example, by moving and adjusting the X-direction table 21, center position adjustment is performed such that the image sensor 11 is located at the center with respect to the chart pattern of the adjustment image sheet 12. That is, the adjustment control unit 14 controls the Y-direction table 20, the X-direction table 21, and the Z-direction table 2 with respect to the adjustment chart pattern of the adjustment image sheet 12.
2 is moved and adjusted to adjust the position of the image sensor 11 in the front-rear direction, left-right direction, and up-down direction. Further, the Ye direction stage 23 and the Zθ direction stage 24 are moved and adjusted to adjust the position of the adjustment chart pattern in the left and right inclination directions and in the front and back inclination directions.

When the position adjustment of the image sensor 11 as described above is completed, the operator fixes the image sensor 11 to the lens block 19 while it is attached to the plate 18. The lens block 19 to which the image sensor 11 is fixed
It will be removed and attached to the OCR body, for example. Here, the operator usually performs a final check by comparing the data after position adjustment as described above (ie, image data for adjustment) with the chart pattern on the image sheet for adjustment 12.

In this way, the stage mechanism section 10 and the adjustment control section 14
With this operation, the position adjustment of the image sensor 11 is automatically executed. Therefore, compared to the conventional manual method, the accuracy of position adjustment can be greatly improved and variations in position adjustment can be reduced.

Moreover, the operator only needs to set the image sensor 11 and the adjustment image sheet 12 before starting adjustment, and after adjustment, perform operations such as removing the lens block 19 to which the image sensor 11 is fixed. Therefore, the position adjustment work can be simplified and the adjustment processing time can be significantly shortened.

[Effects of the Invention] As described in detail above, according to the present invention, the position of the image sensor can be adjusted accurately with a simple operation. Therefore, if the present invention is utilized in the manufacturing process of OCR etc., the image sensor can be easily attached to the required position of OCR with high precision. As a result, it is possible to provide OC and R with excellent quality.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing a schematic configuration of an image sensor adjustment device according to an embodiment of the present invention, and FIGS. 3(a) and (b) are diagrams showing the specific configuration of the stage mechanism section in FIG. 1, and FIG. 4(a) respectively.
1 to 5C are diagrams each showing a specific configuration of the rotation mechanism shown in FIG. 1, and FIG. 5 is a diagram for explaining the operation of the same embodiment. DESCRIPTION OF SYMBOLS 10... Stage mechanism part, 11... Image sensor, 12... Image sheet for adjustment, 13... Rotation mechanism part, 14... Adjustment control part, 19... Lens block, 20... - Y direction table, 21...X direction table, 22...Z direction table, 23...Yθ direction stage, 24...Zθ direction stage. Applicant's agent Patent attorney Takehiko Suzue Figure 1 Figure 2 (a) (b)

Claims (1)

[Claims] An adjustment image sheet setting means for setting an adjustment image sheet on which an adjustment chart is recorded, and an image sensor to be adjusted in the front and back directions with respect to the adjustment image sheet set by the adjustment image sheet setting means. Left and right direction, vertical direction, left and right tilt direction with respect to horizontal direction,
A stage mechanism means that moves in each direction in a front-rear tilt direction with respect to the vertical, and an adjustment control means that drives and controls the stage mechanism means based on image data output from the image sensor to adjust the position of the image sensor. An image sensor adjustment device comprising: