JP2000324517A - Adhering chart for linear sensor camera element and its adhering method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To correctly adjust the adhered position of a linear sensor in a short time by providing a wedge shape pattern toward the center axis of a chart in order to adjust at least the Y-axial direction deviation of the linear sensor. SOLUTION: The adjustment in the Y-axial direction is coarsely executed by the wedge shape 1-1 in the chart 1. The shape is made to be the wedge one so that a wave shape corresponding to the deviation appears on the monitor of a video signal when the large deviation exists in the Y-axial direction. Black and square block patterns are symmetrically arranged in left and right in the upper and lower parts of the positions being different in an X-axis with respect to the center axis of the chart in a Y-axis adjustment pattern 1-3. The adjustment of a Y-axis and θ z-axis is executed by the pattern 1-3. Besides, in an X-axis adjustment pattern 1-4, the patterns where a white dot is arranged in the black square block are symmetrically arranged in the center, left and right in the center axis of the chart to adjust the X-axis. Moreover, a focus pattern 1-2 is a Z-axis adjusting mechanism to adjust both focuses of left and right in the sensor.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to an optical chart used for alignment of a linear sensor element of a linear sensor camera and an alignment method thereof.

[0002]

2. Description of the Related Art In a conventional area sensor such as a CCD camera, adjustment of a bonding position using a moire chart and confirmation of accuracy are performed in bonding a CCD element. In the area sensor, for example, a moiré chart is photographed, and adjustment is performed so that a specific moiré pattern appears on a monitor or a waveform monitor, thereby performing position alignment.

In the case of a linear sensor, the output image is a line, so it is difficult to confirm the image on a monitor or the like. In addition, since it is difficult to confirm the alignment on the monitor when actually using the reticle, it is necessary to insert a reticle line serving as an “alignment reference” on the viewfinder and adjust the shooting position based on the reticle line. For this reason, in a three-plate color linear sensor camera or the like, the reticle line has an R.R. G. FIG. It is necessary to accurately position and attach the respective linear sensors B.

[0004]

SUMMARY OF THE INVENTION The present invention provides a linear sensor camera, which provides an optical chart pattern which is effective for alignment at the time of bonding linear sensor elements, and which uses an alignment method using the chart to attach a pattern. It is intended to increase the accuracy of the alignment.

[0005]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a chart for bonding linear sensor elements, means of an optical system for forming the chart as an optical image on a linear sensor, and an optical image thereof. The position of the linear sensor element is aligned and bonded by means of an optical system capable of visually confirming the center of the optical axis and a means for photoelectrically converting an optical image by a linear sensor and displaying the image waveform.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As an embodiment of the present invention, a method for bonding three color linear sensor cameras is shown in FIG.
This will be described with reference to FIG.

FIG. 1 is a block diagram of an optical system and a sensor unit of a three-plate color linear sensor camera according to this embodiment.

1 is a chart for bonding linear sensor elements. 2 is a lens system for condensing the subject image,
The obtained optical image passes through a color temperature conversion filter 3 and is then split by a half mirror 4. One is on a finder 5, and the other is a color separation prism including R, G, and B trimming filters as spectral optical systems. R incident on 6,
It is branched into three paths G and B. In each optical image, light having only necessary spectral characteristics reaches the linear sensors 7-1 (G), 7-2 (R), and 7-3 (B), which are imaging units. Each linear sensor 7-1 (G), 7-2
The optical images input to (R) and 7-3 (B) are photoelectrically converted to obtain a video signal corresponding to the light intensity. The line sensor image output jig 9 includes a linear sensor 7-1 (G),
It has a function of outputting a synchronization signal synchronized with 7-2 (R) and 7-3 (B) to drive the sensors and amplifying the video signal from each linear sensor. The video signal output from the linear sensor video output jig 9 is input to the waveform monitor 10 and its waveform can be confirmed. 1
Reference numeral 1 denotes a backlight such as a color viewer for illuminating the chart 1 uniformly. 6-axis adjustment jigs 8-1, 8-
2, 8-3 are X, Y, and
It is a jig for adjusting each axis of Z, θx, θy, and θz. A method for bonding linear sensors using the linear sensor bonding chart 1 will be described.

The optical system and the sensor unit are set on a surface plate, and are leveled with a level or the like. The chart 1 is installed at the focus position of the lens 2 so that the center of the chart 1 is horizontal to the height of the optical axis and orthogonal to the optical axis. The chart 1 has a uniform illuminance by illumination of a backlight 11 such as a color viewer. Finder 5
And align the reticle line 12 in the finder 5 with the center of the chart 1. In the case of a linear sensor, since the output image is a line, it is difficult to confirm the position of the reticle line 12 on a monitor when actually using the reticle line. And adjust the shooting position based on that. Of course, the reticle line in the finder is aligned horizontally with the sensor direction of the linear sensor at the center of the optical axis. When the reticle line 12 is deviated from the center of the chart 1, the height, inclination, and the like of the chart 1 or the optical system unit and the sensor unit are finely adjusted so as to match the reticle line 12. The state in the viewfinder 5 at this time is shown in the lower part of FIG. Under the above installation conditions, the G, R, and B linear sensors 7-1, 7-2, and 7-3 are bonded. As a procedure, the linear sensor 7-1 (G) as a reference is bonded, and the linear sensor 7-2 (R) and the linear sensor 7-3 (B) are based on the linear sensor 7-1 (G). And adjust it accordingly. A method of attaching the linear sensor 7-1 (G) as a reference will be described. FIG.
The chart 1 is photographed in the block diagram shown in FIG.
While observing 0, each axis of the linear sensor 7-1 (G) shown in FIG. 2 is adjusted by the 6-axis adjusting jig 8-1, and the alignment is performed. Before describing the detailed procedure of the bonding method, a function of the chart 1 for performing position adjustment will be described. Chart 1 for bonding linear sensor according to an embodiment of the present invention
Has a configuration as shown in FIG. Next, an adjustment pattern for each axis of this chart will be described. (1) Y-axis direction coarse adjustment Wedge shape 1-1 in chart 1 is
This is for performing coarse adjustment in the Y-axis direction shown in FIG.
By using a wedge shape, when there is a large shift in the Y-axis direction, a waveform corresponding to the shift appears on the monitor of the video signal. (2) Y-axis adjustment In the Y-axis adjustment pattern 1-3, black square block patterns are arranged symmetrically above and below (ie, different from) each other on the X-axis with respect to the center axis of the chart. Things. The Y-axis adjustment pattern 1-3 adjusts the Y-axis and the θz-axis. If a block is displaced in the Y-axis direction due to the arrangement of such blocks, unevenness occurs in the video signal in accordance with the shift. If the block is located at the center, the center of the different block becomes the video signal. Does not occur. Further, the left-right difference can be compared by the symmetrical arrangement, so that the inclination of the θz axis can be confirmed.

(3) X-axis adjustment X-axis adjustment pattern 1-4
Is for arranging a white point in a black square block on the center axis of the chart and symmetrically arranging it on the center and left and right to adjust the X axis. In this way, by placing white dots in black square blocks,
The existence was made clearer than when a black spot was provided. In addition, the symmetrical arrangement enables confirmation of the θy axis. (4) Z-axis adjustment The focus pattern 1-2 is an adjustment mechanism for the Z-axis, and adjusts so that the left and right focuses of the sensor are aligned. The focus pattern 1-2 is formed by symmetrically arranging vertical stripes of a pattern in which the interval and the width are gradually reduced, and is used for adjusting the Z axis and the θy axis, which are adjustments of the focus direction. It is. The reason why they are arranged symmetrically is to adjust the θy axis. Further, the reason why the width is gradually reduced is to make it easier to match the narrowest pattern. At the time of adjustment, the Z-axis adjustment mechanism is moved back and forth, and it is confirmed that the left and right moire of the focus pattern 1-2 or the level of the video signal changes simultaneously. Next, a detailed procedure of the bonding method will be described.

First, a method of positioning the linear sensor 7-1 (G) will be described.

Rough adjustment is made by the Z-axis adjustment mechanism so as to approximately match the focus point.

While looking at the waveform monitor 10, the wedge 1-1 in the chart 1 of FIG.
Coarse adjustment to match the center of. Here, FIG. 4 shows the reticle 12 in the finder, and FIG. 5 shows the reticle 12 and the chart 1 in the finder. FIG. 6 shows the video signal waveform at this time. Focus pattern 1 of chart 1
-2 Moire or peak value of video signal to waveform monitor 1
While watching at 0, the focus is finely adjusted by the Z-axis adjustment mechanism to adjust the focus. The adjustment mechanism for the θy axis (rotation in the focus direction) adjusts the right and left focus of the sensor so that they are both in focus. The Z-axis adjustment mechanism is moved back and forth, and it is confirmed that the left and right moire of the focus pattern 1-2 or the level of the video signal changes simultaneously. This adjustment is confirmed in the section 1-2 of the video signal waveform 13 in FIG.

The Y-axis adjustment pattern 1-3 of the chart 1
Then, while viewing the waveform monitor 10, the horizontal mechanism with respect to the center of the chart 1 is adjusted by the Y-axis and θz-axis adjustment mechanisms. The feature of this pattern lies in the pattern arranged vertically on the basis of the center of the chart 1. The linear sensor itself has a certain width. In the case of a pattern such as a point or a line, if the width of the point or line to be matched with the width of the linear sensor is small or large, the position may be slightly shifted as shown in FIG. However, since the level of the output video does not change, accurate positioning cannot be performed. Therefore, the Y-axis adjustment pattern 1- shown here
3, when the linear sensor 7-1 (G) is at the center of the pattern as shown in FIG.
-1 is all the same level in gray. In the pattern 1-3, when the linear sensor is slightly displaced in the Y-axis direction, the level of that portion is displayed as a step as shown in a video waveform 13-2 in FIG. This enables accurate Y-axis positioning.

The adjustment mechanism of the X-axis adjusts so that the white circle 1-4 in the black angle at the center of the chart 1 matches the center of the video waveform.

Θx axis (rotation in sensor axis direction)
Fine adjustment of the adjustment mechanism is performed, and it is checked whether there is any influence while looking at the waveform monitor 10. The θx axis is considered to have little influence on the characteristics of the linear sensor as compared with the other axes, so that it may be basically parallel.

The above operation is repeated and checked several times.

After the adjustment, the linear sensor 7-1 (G) is attached to the color separation prism 6.

After pasting, it is checked whether there is any displacement.

Next, a method of positioning the linear sensor 7-2 (R) will be described.

The waveform monitor 10 performs two phenomena based on the video signal of the linear sensor 7-1 (G),
-2 (R) video signal is adjusted.

At this time, the linear sensor 7-1 (G), the linear sensor 7-2 (R), and the linear sensor 7-3 (B) are driven by a synchronous signal synchronized from the linear sensor video output jig 9. It is. Therefore, synchronization of the waveform monitor 10 is also performed by a synchronization signal from the linear sensor video output jig 9.

The alignment method of the linear sensor 7-2 (R) is the same as that of the linear sensor 7-1 (G), but after adjustment, it is confirmed that there is no deviation from the linear sensor 7-1 (G). I do. By moving the focus ring of the lens, it is confirmed that the left and right moire of the focus pattern 1-2 of the chart 1 or the peak of the video signal changes the same as the linear sensor 7-1 (G).

The alignment of the X-axis is compared with the video signal of the linear sensor 7-1 (G) by the X-axis adjusting mechanism, and white circles in the black angles at both ends and the center on the time axis of the waveform monitor 10. 1
Check that there is no pixel shift. At this time, for example, the linear monitor 7-1, 7-2, 7-
When 3 is 2048 pixels and one scan is 2 ms, 1
Since the time per pixel is about 1 μs, the waveform monitor 10 has a frequency at which the alignment can be sufficiently measured.

Next, a method of positioning the linear sensor 7-3 (B) will be described.

The waveform monitor 10 detects the two phenomena based on the video signal of the linear sensor 7-1 (G) based on two phenomena.
-3 (B) video signal is adjusted.

The positioning method of the linear sensor 7-3 (B) is the same as that of the linear sensor 7-2 (R).

As described above, the reticle line 1 on the finder
2, linear sensor 7-1 (G), linear sensor 7-2
(R) and the linear sensor 7-3 (B) can be positioned on the same optical axis, and accurate bonding can be performed.

In the above description, the embodiments corresponding to all the X-axis, Y-axis and Z-axis have been described.

[0030]

According to the present invention, in the linear sensor camera, it is possible to adjust the bonding position of the linear sensor accurately and in a short time.

[Brief description of the drawings]

FIG. 1 is a block diagram of one embodiment of the present invention.

FIG. 2 is an explanatory diagram showing six-axis adjustment directions of a three-plate color linear sensor of the present invention.

FIG. 3 is a configuration diagram of a chart according to the embodiment of the present invention.

FIG. 4 is an explanatory view of an embodiment of the present invention.

FIG. 5 is an explanatory diagram of an embodiment of the present invention.

FIG. 6 is a waveform chart showing waveforms on a waveform monitor according to the embodiment of the present invention.

FIG. 7 is an explanatory diagram of a pattern for adjusting the Y and θz axes according to the embodiment of the present invention.

FIG. 8 is an explanatory diagram of a factor that causes an error in adjustment of Y and θz axes according to the embodiment of the present invention.

[Explanation of symbols]

1: chart, 1-1: wedge pattern, 1-2: focus pattern, 1-3: Y, θz adjustment pattern, 1-
4: X-axis adjustment pattern, 2: lens, 3: color temperature conversion filter, 4: half mirror, 5: finder, 6:
Color separation prism, 7-1: linear sensor (G), 7-
2: Linear sensor (R), 7-3: Linear sensor (B), 8-1: 6-axis adjustment jig (G), 8-2: 6-axis adjustment jig (R), 8-3: 6-axis adjustment jig (B),
9: Linear sensor video output jig, 10: Waveform monitor,
11: backlight, 12: reticle line, 13: video waveform, 13-1: video signal at the time of Y, θz axis adjustment, 13-2:
Video signal at the time of Y, θz axis shift.

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Shin Yoshida 32 Miyukicho, Kodaira-shi, Tokyo F-term in Koganei Plant, Hitachi Electronics Co., Ltd. 5C061 BB02 BB03 BB09 BB15 5C065 AA03 BB26 DD02 EE01 EE02 EE12 FF03 FF04

Claims (8)

[Claims] 1. An optical chart for adjusting and confirming a bonding position at the time of bonding a linear sensor element of a linear sensor camera, wherein the chart is used to adjust at least a displacement of the linear sensor in a Y-axis direction. A sticking chart for a linear sensor camera element, wherein a wedge-shaped pattern is provided toward a central axis of the linear sensor. 2. An optical chart for adjusting and confirming a bonding position at the time of bonding a linear sensor element of a linear sensor camera, wherein the chart is used to adjust at least a displacement of the linear sensor in a Y-axis direction. 3. A sticking chart for a linear sensor camera element, wherein black square block patterns are arranged so as to be different from each other with respect to a central axis of the linear sensor camera element. 3. An optical chart for adjusting and confirming a bonding position at the time of bonding a linear sensor element of a linear sensor camera, wherein at least a displacement of the linear sensor at least in the X-axis direction on a central axis of the chart. 3. A sticking chart for linear sensor camera elements, wherein white dots are arranged in a black square block in order to adjust. 4. The pattern according to claim 3, wherein a pattern in which white points are arranged in the black square block is provided at the center of the bonding chart of the linear sensor camera element and at a position symmetrical with respect to the center. A bonding chart for a linear sensor camera element, characterized in that: 5. An optical chart for adjusting and confirming a bonding position at the time of bonding a linear sensor element of a linear sensor camera, wherein a deviation of at least the Z-axis direction of the linear sensor is on a center axis of the chart. A linear sensor camera element laminating chart, wherein vertical stripe patterns are arranged such that intervals and widths are gradually reduced in order to adjust the distance. 6. The linear sensor according to claim 1, wherein each pattern of the sticking chart for the linear sensor camera element is provided symmetrically with respect to the center of the chart. Chart for bonding sensor camera elements. 7. An optical chart for adjusting and confirming a bonding position when a linear sensor element of a linear sensor camera is bonded, comprising: a wedge-shaped pattern directed to a central axis of the chart; and a central axis of the chart. In contrast, a pattern in which black square blocks are arranged differently, and a pattern in which white points are arranged in black square blocks on the center axis of the chart,
A linear sensor camera element bonding chart, wherein a vertical stripe pattern whose interval and width gradually become narrower is arranged on the center axis of the chart. 8. The linear sensor according to claim 1, claim 2, claim 3, claim 5 or claim 6, wherein an optical image of the chart is converted into a video signal by a linear sensor. A method for bonding linear sensor camera elements, comprising converting and adjusting the position of the linear sensor element while displaying the video signal waveform on a monitor.