JPS628517Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a reflection distribution measuring device for measuring, for example, the gloss of a test object.

As shown in FIG. 1, a conventional reflection distribution measuring device projects a parallel light beam 4 from a light source 3 perpendicularly onto a surface 2 to be measured of an object 1 to be measured, and also uses a photoelectric conversion section composed of, for example, a photocell. 5 as test object 1
The structure is such that the reflection distribution of the surface 2 to be measured of the object 1 to be measured is measured while rotating the object 1 to be measured. In this conventional reflection distribution measuring device, when the light source 3, the photoelectric conversion section 5, and the test object 1 are lined up in a straight line, the light beam 4 from the light source 3 is interrupted by the photoelectric conversion section 5 itself, so that the light beam 4 is reflected. It has the disadvantage that it makes it impossible to measure light. FIG. 2 shows this. The reflection distribution curve showing the relationship between the amount of light actually received by the photoelectric conversion unit 5 and the rotational position of the photoelectric conversion unit 5 around the test object 1 is , a rotational position where the photoelectric conversion unit 5 and the test object 1 are aligned in a straight line.
At 90 degrees, the amount of light received decreases dramatically. That is, the diffusely reflected light of the object 1 to be inspected can be detected, but the specularly reflected light cannot be detected. Therefore, the conventional reflection distribution measuring device described above cannot continuously accurately and quickly determine the reflection distribution curve of the surface 2 to be measured of the object 1 to be measured.

This idea was made in consideration of the above circumstances,
The light source, the photoelectric conversion unit, and the object to be measured are arranged so that the light from the light source is not interrupted by the photoelectric conversion unit. It is an object of the present invention to provide a reflection distribution measuring device that can measure distribution curves continuously, accurately and quickly.

Hereinafter, the present invention will be described in detail based on embodiments with reference to the drawings.

The reflection distribution measuring device of the present invention includes a reflection distribution measuring section and a signal processing section electrically connected to the reflection distribution measuring section. As shown in FIGS. 3 and 4, the reflection distribution measuring section includes a flat base 6, a light source support column 7 vertically erected on the ridge of this base 6, and an upper end of this light source support column 7. A light source 3 is attached to the holder and projects parallel light beams 4 in the direction of arrow A through a lens 8, and a holding part 10 is vertically erected in the center of the base 6 and has a branched upper part to hold the sample holder 9. , 10, a rotating rod 12 formed in a rod shape and attached to the base 6 so as to be rotatable in the direction of arrow B in FIG. (The surface is parallel to the light beam 4.) A support column 13 is erected at the tip of the rotary rod 12, and an arrow C in FIG. From the photoelectric conversion unit 5 which is mounted so as to be able to move up and down in the direction and fixed at any position, and the drive motor 14 which is provided on the back side of the base 6 and is connected to the rotary rod 12 and drives the rotary rod 12 to rotate. It's summery. Then, the sample holder 9
As shown in the figure, a recessed portion is formed to accommodate the object to be measured 1, and an opening portion 16 is provided in a portion of the object to be measured 1 that comes into contact with the surface to be measured 15.
Further, the sample holder 9 is configured such that the surface to be measured 15 of the object to be measured 1 held by the sample holder 9 is perpendicular to the optical axis 17 of the lens 8, and the optical axis 17 and the surface to be measured 15 are perpendicular to each other. It is attached to the clamping portion 10 so as to be rotatable (in the direction of arrow D in FIG. 4) about a straight line passing through the intersection 18 and parallel to the rotating surface of the rotary rod 12 as the rotation axis, and to be fixed at any rotation angle. Furthermore, the support column 13 is also rotatable with respect to the rotary rod 12 with a straight line perpendicular to the longitudinal direction of the rotary rod as the rotation axis (arrow E in Fig. 4).
direction) and can be fixed at any rotation angle. However, the height of this support column 13 is set so as not to block the light beam 4.

On the other hand, the signal processing section, as shown in FIG.
It consists of a photoelectric conversion section 5, an amplifier 19 electrically connected to the photoelectric conversion section 5, and a display section 20, such as an X-Y recorder, which is electrically connected to the amplifier 19 and displays a reflection distribution curve. ing.

Next, the operation of the reflection distribution measuring device of the present invention will be explained.

First, as shown in FIG. 5, the test object 1 is held on the sample holder 9. However, this sample holder 9
is tilted by an angle θ. The size of this angle θ is determined so that the photoelectric converter 5 can receive the anti-reflection light of the light beam 4 on the surface to be measured 15 . That is, it is sufficient to incline only half of the angle formed by the optical axis 17 and the straight line connecting the intersection 18 and the photoelectric conversion section 5 . Under this condition, the light source 3 projects the light beam 4, and at the same time, the drive motor 14 is operated to rotate the rotary rod 12 at a constant speed from the rotation angle position of 0° to the rotation angle position of 180° as shown in FIG. let
As a result, as shown in FIG. 7, reflected light over the entire rotation angle enters the photoelectric conversion section 5, and the output level (voltage or current) of the photoelectric conversion section 5 corresponds to the amount of light received. ) is output, and this electrical signal is sent to the amplifier 1
After being amplified in step 9, a reflection distribution curve over all rotation angles shown in FIG. 7 is displayed on the display section 20. The rotation angle of this reflection distribution curve does not strictly correspond to the reflection angle because the light beam 4 from the light source 3 does not enter the surface to be measured 15 perpendicularly. However, even if it is assumed that the rotation angle is approximately equal to the reflection angle and the physical properties of the surface to be measured 15 are evaluated based on the shape of the obtained reflection distribution curve, there will not be a large difference in the evaluation results. .

As described above, in the reflection distribution measuring device of the present invention, the sample holder is set so that the course direction of the specularly reflected light on the surface to be measured of the light projected from the light source is inclined with respect to the direction of projection of the light from the light source. The reflected light on the surface to be measured is received by a photoelectric conversion unit so as not to block the light from the light source, and converted into an electrical signal, and a reflection distribution curve is displayed based on this electrical signal, Since the specularly reflected light and the diffusely reflected light from the surface to be measured of the test object can be continuously received, a reflection distribution curve can be obtained accurately and quickly, and the quality of the gloss of the surface to be measured can be accurately determined.

In the above embodiment, the rotary rod is rotated, but on the contrary, the photoelectric conversion section is fixed, and photoelectric conversion is performed integrally with the sample holder and the light source while maintaining a constant positional relationship. It may also be rotated relative to the section. Furthermore, in the above embodiment, the support column 13 may be movable on the rotary rod 12 in the direction of arrow F in FIG. 4 and fixed at any position.
Furthermore, since the light from the light source 3 does not necessarily have to be parallel rays, the lens 8 can be omitted.
In addition, various changes can be made without departing from the gist of the present invention.

[Brief explanation of the drawing]

Fig. 1 is a diagram for explaining the drawbacks of the conventional reflection distribution measuring device, Fig. 2 is a diagram showing the relationship between the rotation angle of the photoelectric conversion unit and the amount of light received by the conventional reflection distribution measuring device, Fig. 3, and Figure 4 is a plan view and front view showing the reflection distribution measuring device of the present invention, and Figure 5 is a
The figure is a sectional view of the main parts of the sample holder, Figure 6 is a diagram showing the signal processing section of the reflection distribution measuring device of the present invention, and Figure 7 is a diagram showing the rotation angle of the photoelectric conversion section of the reflection distribution measuring device of the present invention. FIG. 3 is a diagram showing the relationship with the amount of received light. 3... Light source, 5... Photoelectric conversion unit, 9... Sample holder.

Claims (1)

[Claims for Utility Model Registration] A reflection distribution measuring device characterized by having the following configuration. (b) A light source that projects light. (b) Holding the object to be measured with the surface to be measured facing the light source so as to be able to rotate around an axis perpendicular to the optical axis of the light projected from the light source; A sample holder for adjusting the reflection angle on the surface to be measured. (c) The light source and the sample holder are provided so as to be rotatable relative to the sample holder while maintaining a constant positional relationship at a position where the light projected from the light source is not interrupted. A photoelectric conversion unit that receives reflected light from the measurement surface and converts it into an electrical signal. (d) A display section that is electrically connected to the photoelectric conversion section and displays a reflection distribution curve based on the electrical signal output from the photoelectric conversion section.