JPS58122448A - Varied-angle colorimeter - Google Patents

Abstract

PURPOSE:To detect the orientation of reflection or transmission diffusion of a sample and to make a precise analysis of a property of a body color, by constituting so that a light projecting part and a photodetecting part for the sample are made rotatable in the range of each prescribed angle. CONSTITUTION:Light from a light source 1 is introduced into a projector 5 through X, Y, Z color filters and an optical fiber 6 attached to a turntable 3 rotating by a condensing lens 2 and a motor 4 and said light is projected to a sample (a) and then, its reflected light is detected by a photodetector 8. A shaft 11 of a supporting board 9 supporting the photodetector 8 through a worm gear 12 is rotated by the rotation of a shaft of a motor 13 and the photodetector 8 is rotated in the range of 0-360 deg.. On the hand, the projector 5 supported by a supporting board 7 which is attached freely rotatably to the shaft 11, is rotated in the range of 0-90 deg. by manual operation. Accordingly, measurement of reflection (transmission) diffusion orientation of the sample A is made possible and a precise analysis of a property of a body color is made.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a variable angle colorimeter, and more particularly to a variable angle color needle capable of performing both gloss measurement and colorimetry. It was a so-called dedicated measuring instrument that could measure only one element, with both the light receiver and the light receiver fixed at a predetermined angle, and the gloss needle and colorimeter were each separate.

In addition, since the above-mentioned colorimeter has a fixed emitter and receiver, it can only be measured in one fixed state. Therefore, changes in the light emitting angle and receiving angle can affect the reflection and diffusion of the sample. It has been impossible to accurately analyze the color properties of objects such as metals, fibers, metallic coatings, etc., which have different light distributions and whose colors appear different depending on the angle. This was done in view of the circumstances,
By making it possible to measure gloss and colorimetry at the same time with one machine, and by changing the angles of the emitter and receiver, the reflected diffused light distribution (and transmitted diffused light distribution) of the sample can be determined, and the color of the object can be determined. The purpose is to provide a color saturation meter that can accurately analyze properties.

The variable-angle color needle of the present invention that achieves the above purpose consists of a light projecting section that projects light from a light source onto a sample through a color filter, and a light receiving section that receives reflected light or transmitted light from the sample. It is characterized in that the light section can move within a range of 0 to 90' with respect to the sample, and the light receiving section can move within a range of 0 to 6600.

In the variable-angle color needle according to the present invention, the light to be projected onto the sample is obtained by passing the light from the light source through a color filter in advance and guiding it to the light projecting section through an optical fiber, or by using a light source provided in the light projecting section. It is possible to attach a color filter to the front and project the image.

Below, one embodiment of the present invention will be described based on the drawings.
The variable-angle color needle is attached to the emitter part, the light receiver part (g), and the sample mounting table (
C).

The light projector consists of a light source (1), a focusing lens (2), and a rotating plate (on which x, y, and z color filters with different wavelengths are attached).
3), Rotating plate (3) Tt drive rotating motor (4),
It consists of an optical fiber (6) that guides the light that has passed through the color 70 router to a projector (5), which is fixed to a rotatable support plate (7).

A sample mounting table (Q) is installed on the rotation center line of the support plate (7) to which the projector (5) is attached, and the sample mounting table (C
) The light receiving part (g) is formed so as to rotate *g.

The light receiving part (b) consists of a light receiver (8) and a support plate (9) on which the S light receiver (8) is attached, and the center of the support plate (9) is connected to a circular plate (on which the emitter (5) is attached). 7) is located on the rotation center line and is rotatably installed.

Below, we will explain the rotational mounting structure of the light projector (unit) in the light projector and the light receiver (8) in the light receiving part (B).
A rotating shaft (11) is rotatably supported on the receiving frame shaft, and a support & (9) is provided with a light receiver (8) at the tip of the rotating shaft αυ.
are fixed integrally, and a worm gear a is fixed to the rotating shaft aυ, which meshes with the worm gear attached to the rotating shaft of the motor αj, so that the rotating shaft αυ is driven and rotated at the same time. .

Also, on the outside of the rotating shaft 0υ that protrudes from the receiving frame shaft, there is a receiving tube a4.
is fitted and fixed to one end of the receiving frame shaft, and a support plate (7) equipped with a projector (5) is rotatably fitted to the receiving tube I.

That is, a support plate (7) equipped with a light emitter (5) and a light receiver (
The support plate (9) equipped with 8) is designed to rotate around the rotation axis 0υ, and the support plate (7) is manually operated.
Further, the support plate (9) is configured to be rotated by a motor (13).

Furthermore, the support plate (9) with the light receiver (8) is arranged at a certain angle (
For example, it is controlled to move intermittently every 5 degrees,
The control means consists of a rotating shaft (11) &l: fixed disk I, and synchronization signal detectors aSaγ installed in correspondence with the front and back sides of the outer peripheral edge of the disk ae,
When the notches or pores formed at a constant angle on the outer peripheral edge of the disc are located on the line of the synchronization signal detection aasas', the support plate (9) rotates by a constant angle. Of course, it is optional to attach a protractor to the front of the support plate (9) so that the position of the light receiver (8), which rotates intermittently at regular angles, can be quickly confirmed. The supporting plate (7) is attached with a spring to manually change the projection angle to a predetermined angle, that is, 30°, 45°, and 60° in the range of 0 to 900 relative to the sample. It is maintained in a predetermined state by a moderation holding mechanism consisting of an L-rule and a recessed portion.

In addition, although only the optical system measuring instrument is shown in the drawing,
Of course, a recording and display device can be connected to the measuring device to automatically record (print out) the measured values, or to display the light distribution curve on a cathode ray tube.

With the above configuration, it is possible not only to measure color, but also to measure gloss when the emission angle and reception angle are the same, and by changing the angle of the installation and receiver, each angle can be measured. It is possible to know the intensity of the reflected and diffused light of the sample (→) as well as the chromaticity at each angle, which makes it possible to accurately analyze the color properties of samples, especially metallic samples. be.

Furthermore, when the emitter/receiver is positioned above and below the sample, it is also possible to know the transmitted and diffused light distribution of the sample.As detailed above, the colorimeter of the present invention has the following features: By making the light projecting section and the light receiving section movable, the following advantages are obtained.

■ Both glossiness and colorimetry can be measured at the same time.

■ By varying the angles of the light emitting and receiving parts, it is possible to determine the intensity of reflected and diffused light from the sample at each angle, as well as the chromaticity at each angle. It becomes possible to accurately analyze colors.

(2) By placing the light emitting part and the light receiving part vertically facing each other with the sample in between, it is possible to measure transmitted color and transmitted diffused light distribution.

Therefore, it is possible to provide a highly practical colored needle.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, with FIG. 1 being a plan view and FIG.
The figure is an explanatory diagram showing the movement of the light emitting/receiving section. In the figure: Emitter: Light emitting part (2): Light receiving part (a): Sample Patent applicant Nippon Denshoku Kogyo Co., Ltd.

Claims (1)

[Claims] It consists of a light projecting section that projects the light from the light source onto the sample through a color filter, and a light receiving section that receives the reflected light or transmitted light from the sample. A variable angle colored needle characterized in that the light receiving part is movable in a range of 0 to 360 degrees.