JPH0566304A - Manufacture of standard reflecting surface and device for manufacturing the same - Google Patents

Abstract

PURPOSE:To reduce a solid difference in reflection characteristics on a PTFE powder press-fixed surface by reducing the unevenness of density of the PTFE powder press-fixed surface. CONSTITUTION:Powder of a reflecting material 1 with specific weight is put in the container consisting of a reflecting material container 2, a fixture 3, and a cylinder 4 and a piston 5 is inserted into the cylinder 4. This piston 5 is moved toward the reflecting material container 2 and a position detector 6 detects the piston 5 passing through the vibration start position 8 of the cylinder 4 and drives a vibration generator 7. This vibration generator 7 vibrates the reflecting material 1, whose particle distribution becomes uniform. The position detector 6 once detecting the piston 5 passing through the vibration stop position 9 of the cylinder 4 stops the vibration generator 7. The piston 5 stops at a boundary between the cylinder 4 and reflecting material container 2 to compress the reflecting material 1. The fixture 3 is detached and the reflecting material container 2 is removed from the cylinder 4, thereby completing the press-fixed surface of the reflecting material 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a standard reflecting surface manufacturing method and a standard reflecting surface manufacturing apparatus used for an incident optical system of an optical measuring instrument or a diffuse reflectance standard.

[0002]

2. Description of the Related Art Conventionally, a diffuse reflection surface that diffuses and reflects incident light has been used in an incident optical system of an optical measuring instrument for the purpose of improving the incident angle characteristic of the device and eliminating the influence of the polarization characteristic of the incident light. Has been. In addition, a diffuse reflectance standard plate having a reflectance value as a reflectance standard is used in an apparatus for measuring reflectance characteristics of materials and the like. Furthermore, when calibrating the indicated value of a luminance meter or a luminance meter type optical measuring instrument,
A standard reflection surface whose reflection characteristics such as radiance factor is known is irradiated with a light source whose illuminance and spectral irradiance are known, and calibration is performed using the reflected light from the standard reflection surface.

Such a standard reflection surface has a diffuse reflectance value of 100%, and is treated as having a perfect diffuse reflection characteristic in which the reflection goniometer characteristic follows Lambert's cosine law. Therefore, as the material used for the standard reflecting surface, white scattering material such as barium sulfate powder pressure-bonded, barium sulfate solution with binder applied, or sintered alumina is used. Although it is
An optical measuring instrument using these standard reflecting surfaces due to the large individual differences in characteristics, the reflectance value being low with respect to 100%, and the fact that the reflected goniometer characteristics deviate from Lambert's cosine law. However, in this case, the measurement error may be large, which is a problem.

Instead of these materials, PTFE (Poly-T
It has been reported that the pressure-bonded surface of etra-Fluoro-Ethylene) powder is suitable as a standard reflective surface (Suzuki, Ohno: Proceedings of the 1991 National Meeting of the Lighting Society of Japan, P202). This PTFE powder is
By defining the density during pressure bonding, the reflection characteristics can be approximated to a perfect diffuse reflection surface, and the individual difference is small. Therefore, the standard reflection surface can be easily manufactured by pressing the PTFE powder having a weight corresponding to the volume of the sample cell.

[0005]

However, in the above-mentioned conventional one, PT as a reflective material is used at a low density.
When the FE powder is pressure-bonded, since the PTFE powder particles are not evenly distributed in the sample cell, there is a problem in that density unevenness occurs on the pressure-bonded surface, which causes variations in the reflection characteristics of the pressure-bonded surface. It was

The present invention solves the above-mentioned conventional problems. When manufacturing a pressure-bonded surface of a reflective material such as PTFE powder, it is possible to reduce the unevenness in density to reduce individual differences in the reflection characteristics of the pressure-bonded surface. An object of the present invention is to provide a standard reflection surface manufacturing method and a standard reflection surface manufacturing apparatus that can be manufactured.

[0007]

In order to solve the above-mentioned problems, the standard reflecting surface manufacturing method of the present invention is to manufacture a standard reflecting surface by crimping a powder of a reflecting material having a specific weight while vibrating. is there.

Further, the standard reflective surface manufacturing apparatus of the present invention comprises a reflective material container for containing a powder of a reflective material, a cylinder fixable to the reflective material container, and the reflective material container rubbed in the cylinder. A piston for crimping a reflective material inside to produce a standard reflective surface, a position detector that detects that the piston has passed a specific position in the cylinder, and a reflective material container by the detection output of the position detector. And a vibration generator that gives vibration.

[0009]

With the above construction, the reflective material container and the cylinder are fixed, a powder of the reflective material of a specific weight is put in the reflective material container, and the piston rubs the cylinder to press the reflective material and press it. A crimping surface is manufactured by using this as a standard reflection surface. At this time, the position detector detects that the piston has passed a specific position in the cylinder, and gives vibration to the reflective material container.Therefore, vibration can be applied to the powder when the reflective material is pressed against the powder. As a result, the non-uniformity of the particle distribution is reduced and the uneven density of the pressure-bonded surface is reduced, and a uniform pressure-bonded surface is produced. Therefore, the difference in the reflection characteristics between the pressure-bonded surfaces is small.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing the principle of a standard reflective surface manufacturing apparatus according to an embodiment of the present invention. In FIG.
The cylinder 4 is fixed to the opening side of the reflection material container 2 in which the powder of the reflection material 1 is placed, and fixed by the fixture 3 so that at least the inner surface thereof coincides. A piston 5 is provided so as to be vertically slidable in the cylinder, and the reflection material 1 in the reflection material container 2 is pressure-bonded by the piston 5 to manufacture a pressure-bonded surface. Here, the outer shape of the piston 5, the inner shape of the cylinder 4, and the inner shape of the reflective material container 1 are the same, and the piston 5 is
You can rub inside. The length of the piston 5 is the cylinder 4
Shall be at least the length of.

A position detector 6 is provided on the bottom surface of the piston 5, and the position detector 6 detects that the piston 5 has passed a vibration start position 8 which is a specific position in the cylinder 4. Output the detection output. Further, a vibration generator 7 is provided below the reflective material container 2 in contact with the bottom surface of the reflective material container 2, and the detection output of the position detector 6 causes the powder of the reflective material 1 to pass through the reflective material container 2. It is configured to provide vibration.

With the above configuration, the operation will be described below. First, the opening side of the reflective material container 2 and one end of the cylinder 4 are fixed by the fixture 3. At this time, steps and deviations are prevented from occurring inside the reflective material container 2 and the cylinder 4. Next, a specific weight of the powder of the reflective material 1 is put into a container composed of the reflective material container 2, the fixture 3 and the cylinder 4. Then, the piston 5 is inserted into the cylinder 4, and the piston 5 is slid in the direction of the reflective material container 2 and moved. At this time, the position detector 6 detects that the piston 5 has passed the vibration start position 8 of the cylinder 4,
The vibration generator 7 is driven. And the vibration generator 7
Gives vibration to the reflective material container 2, and the reflective material 1 vibrates through the reflective material container 2. Thereby, the particle distribution of the reflective material 1 becomes uniform.

After that, when the position detector 6 detects that the piston 5 has passed the vibration stop position 9 of the cylinder 4, the position detector 6 stops driving the vibration generator 7. Then, the piston 5 stops at the boundary between the cylinder 4 and the reflective material container 2, and the reflective material 1 in the reflective material container 2 is pressed by the piston 5. Further, by removing the fixture 3 from the reflective material container 2, the reflective material container 2 is removed from the cylinder 4, and the crimping surface of the reflective material 1 is manufactured to complete the standard reflective surface.

The weight of the reflective material 1 may be calculated from the volume of the reflective material container 2 and the crimping density of the target crimping surface. When using PTFE powder as the reflective material 1,
The pressure-bonding density of the pressure-bonding surface is preferably 1 [g / cm3].
Furthermore, the reflective material 1 should be well crushed. In addition, a reference surface of a certain roughness may be placed between the piston and the material. Furthermore, the vibration frequency, vibration intensity,
The vibration start position, the vibration stop position, etc. are set individually for each reflective material 1.
It is advisable to experimentally find the optimum value for.

[0015]

As described above, according to the present invention, the pressure-sensitive adhesive surface is manufactured by pressure-bonding the powder of the reflective material of a specific weight while applying vibration.
It is possible to reduce the non-uniformity of the particle distribution of the powder and to reduce the density unevenness of the pressure-bonded surface. Therefore,
It is possible to reduce individual differences in the reflection characteristics on the pressure-bonded surface of the reflective material.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing the principle of a standard reflective surface manufacturing apparatus according to an embodiment of the present invention.

[Explanation of symbols]

 1 Reflective Material 2 Reflective Material Container 3 Fixture 4 Cylinder 5 Piston 6 Position Detector 7 Vibration Generator 8 Vibration Start Position

Claims (2)

[Claims] 1. A standard reflecting surface manufacturing method for manufacturing a standard reflecting surface by pressure bonding powder of a reflecting material having a specific weight while applying vibration. 2. A reflective material container containing a powder of reflective material,
A cylinder that can be fixed to the reflective material container, a piston that rubs inside the cylinder to crimp the reflective material in the reflective material container to produce a standard reflective surface, and the piston passes through a specific position in the cylinder. An apparatus for producing a standard reflecting surface, comprising a position detector for detecting that a vibration has occurred, and a vibration generator for vibrating the reflection material container by the detection output of the position detector.