JP2002197951A - Non-contact alignment jig for reflection sensor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform non-contact alignment of a reflection sensor and a reflector with high precision when inspecting electrical characteristics of the reflection sensor. SOLUTION: For a driving system, a micrometer and a precision stage are used, and fine adjustment on the order of μm is possible. For the measuring system, a laser discrimination sensor is used, fine adjustment on the order of μm is possible, and the discrimination is shown by lamp indication. By combining the above systems in the jig, non-contact alignment of the reflection sensor and the reflector can be performed easily with high precision.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION A reflection sensor is a light-emitting element.
(For example, an LED) and a light receiving element (for example, a photo Tr), which detects reflected light and checks for the presence or absence of an object.

In inspecting the characteristics of the reflection sensor, it is important to accurately adjust the distance between the sensor and the object. See FIG.

[0003]

2. Description of the Related Art To accurately match the distance between a reflection sensor 1 and a reflection object 2, one of them is fixed and the other is placed on a precision stage with a micrometer movable in the X-axis direction. See FIG. As an example, a case where the distance is set to 1 mm will be described.

As shown in FIG. 3B, the reflection sensor 1 and the reflection object 2 are brought close to each other until they come into contact with each other, and the value 5 of the micrometer is read.

Next, as shown in FIG. 3C, the interval is increased while observing the value 6 of the micrometer until the value 6 becomes smaller than 5 by 1 mm.

[0006]

The conventional method of aligning a reflection sensor with a reflection object has the following problems as shown in FIG.

[0007] 1. Since the reflection sensor and the reflection object are in contact once, the surface of the reflection sensor and the reflection object are damaged and deteriorated.

[0008] Therefore, the characteristic data changes, and reproducible data cannot be obtained.

[0009] 2. While reading the value of the micrometer,
It takes time to adjust the alignment. In addition, mistakes are likely to occur.

[0010]

SUMMARY OF THE INVENTION As in the prior art, a reflection sensor and a reflection object are not brought into contact with each other and aligned, but can be performed in a non-contact manner.

As the means, a laser discrimination system using laser light is adopted. The laser discrimination method will be described.

As shown in FIG. 4A, a laser beam is emitted with a certain width between a light emitting section 1 and a light receiving section 2 of the laser.

When the obstacle 4 is inserted in the meantime, the light shielding amount 1 and the output become as shown in FIG. By utilizing this characteristic, the position of the obstacle can be accurately measured (about 10 μm).

The measurement result is displayed on an LED lamp and is easily understood.

[0015]

FIG. 1 shows an embodiment of the present invention.

The case where the distance between the reflection sensor 3 and the reflection object 6 is actually set to 1 mm will be described. First, the operability was improved in two stages of coarse adjustment and fine adjustment. The reflector 6 is retracted by about 50 mm to facilitate replacement of the reflection sensor 3. The reflection sensor 3 is put into the socket 4, the reflection object 6 is advanced by about 50 mm, and the reflection sensor 3 and the reflection object 6 are moved.
To a distance of about 1.3 mm. ... Coarse.

Next, the position of the reflection sensor 3 attached to the precision stage 5 is brought closer to the reflection object 6 using a micrometer. At this time, there is no need to read the value of the micrometer, and only the moving mechanism of the micrometer is used.

When the distance is approximately 300 μm, it is only necessary to confirm the lighting of the indicator 8 attached to the laser amplifier unit. … Fine adjustment.

The threshold of this LED lamp 8 is
It is necessary to calibrate the distance in advance using the output characteristics shown in FIG.

After the alignment, it is necessary to stop the laser emission when measuring the electrical characteristics of the reflection sensor.

[0021]

Advantages of the invention The alignment between the reflection sensor and the reflection object could be performed without contact.

B. By using the laser discrimination method and the precision stage with a micrometer, the alignment accuracy was improved to about 50 μm.

C. When measuring the electrical characteristics, the alignment work only required to confirm the lighting of the lamp, and the work efficiency was improved.

[Brief description of the drawings]

FIG. 1 is a view showing a reflection sensor non-contact positioning jig of the present invention.

FIG. 2 is a diagram of a characteristic example of a reflection sensor.

FIG. 3 is a diagram of an example of a conventional alignment method of a reflection sensor.

FIG. 4 is an explanatory diagram of a laser discrimination method.

[Explanation of symbols]

 1. Laser emitting part 2. Laser receiver 3. Reflection sensor 4. Socket 5. Precision stage 6. Reflector 7. 7. Laser controller LED display

Claims (1)

[Claims] 1. A jig characterized in that alignment of a reflection sensor and a reflection object can be performed in a non-contact manner using a laser discrimination method and a precision stage with a micrometer.