JPS5960229A - Integrating sphere type reflection measuring device - Google Patents

Abstract

PURPOSE:To perform two reflection measurements without changing the positions of a light source and a light detector, by providing four windows in the same plane including an optical axis in an integrating sphere, with one window as a light inputting window, another window as a light emitting window, and the remaining two windows as sample windows. CONSTITUTION:In an integrating sphere, four windows Wi, Wo, Ws1, and Ws2 are provided. In the case of Ro/d measurement, a sample S is placed at the window Ws1 facing the light inputting window Wi. A white plate Sw is placed on the other sample window Ws2. Then, the light, which is inputted from the light inputting window Wi, is directly inputted to the sample S in the vertical direction. The component of the light reflected by the mirror surface of the sample S is emitted out of the integrating sphere through the light inputting window Wi. Only the diffused component of the reflected light repeats the reflection in the integrating sphere and is inputted to a light detector D through the light emitting window Wo. In the case of Rd/o measurement, the white plate Sw is placed at the sample window Ws1, and the sample S is paced at the sample window Ws2 facing the light emitting window Wo.

Description

[Detailed description of the invention] The present invention relates to a reflection measuring device using stacked balls.

The reflection characteristics of one side of the sample eaves determine the visual texture of the sample, and are also related to the quality of the material's surface finish. In the measurement, the illumination conditions include direct illumination from one direction and illumination by diffused light. In addition, as conditions on the light receiving side, there are cases in which only diffuse reflection light excluding specular reflection light is measured, cases in which total reflection (including both specular reflection and diffuse reflection)16 is measured, and a combination of both. Various types of reflection measurements can be performed using the integrating sphere.
An integrating sphere reflectance measurement device is convenient for reflection measurement because W light can be easily handled.

First, for the convenience of the following explanation, we will explain the symbols that represent the types of reflection measurement and measurement. The symbol 1° is in fractional format with the illumination line to the left of the diagonal line) 41-1, and the light receiving condition is shown at the bottom right.
is the sample m in the receiving direction of the direct illumination light or the reflected light from the sample.
l is the angle formed with the normal, 00 means perpendicular to the sample surface, and d is the illumination light 2 reflection).
is the total reflected light that is a combination of the specular reflection component and the expanded 119 reflection component. For example, (1/CI is vertical illumination with direct light, and only the diffuse reflected light excluding the specular reflection component is measured. Cl10 is magnified 11 (normal illumination, and the reflected light is measured from the normal direction of the sample surface. This means that the light is received and measured, and since it is clear that the reflectance -1 is constant τ, Rn/(l, R(+/+1', 9 and 1) are 1.
J1i myself.

i; L flux IJli or the spherical reflection measuring device is light i1B,'
i and the photodetector point are fixed (, with the condition u/d or (1/
The present invention allows the use of a conventional spectrophotometer without the need to replace the light source and light detection kji of 11°/+". reflection 1
I11J was used as a constant unit for measurement test;
+1/(1 just by changing the position of ゛[.

(The purpose of the present invention is to provide a multi-sphere type foul measuring device capable of measuring both types of reflection of l/'n. Same-
Four windows are provided in the horizontal direction, and among these four windows, - is used as the pre-input r, n: tx, and the - of the pond is used as the light exit window, and the remaining two windows are tested): S1 By placing a sample on one of these two windows and a white board on the other, you can also perform simultaneous measurements of o/d and dlo by exchanging the positions of the two windows. The present invention will be described below with reference to examples.

FIG. 1 shows an embodiment of the present invention.
Show no attitude. 1 or integrating sphere X~1. ~Vo, WS
l.

) vs 2 four windows. In this embodiment, these windows are provided at both ends of two diameters that are perpendicular to each other in one plane 1- passing through the center of the integrating sphere I. o is a light exit window, and there are two sample windows: WS1 facing W i and WS2 facing W o. The monochromatic light is emitted from the spectroscope on the right side outside the area (7 monochromatic light is transmitted through the mirror R1), M2. The center line of the luminous flux, that is, the line connecting the window W] and each center of W51, and the center of the window Ws 2 and W o. IIIl
Let l be 1, both>'61llllll in this example (
Page crossing +4: l'I CI・[light+jiH1
+1. +7 is a condensing optical system, and the light exit window (■forms the image of the window WS2 facing 0 on the baffle plate BF2J2); D is a photodetector;
The baffle plate I3F2 includes the window WS2 H51 (the steepest part of the inner surface of the 1st sphere I
+I). That is, the window~'
1a+, 7)) (This person ri
6. There is also a baffle BF1 placed on the back side of the optical system I5, but this is also used for stirring)
'6 or in the future 1 "I! 'A: i l) 7. Next, let's explain how to use the iu example device +l Rt
)/ (1ijjlll fixed intestine a as shown in Figure 1A.
Place the white board 8w on the other trial 11: [, ', fi < Ws 2. The white board Sw has the same reflective characteristics as the inner surface of the stack, and for example, B aS OII paint rli
Saka is used. In this way, the light incident on the sample 8 from the light incidence window W1 directly strikes the sample 8 vertically. 1 On the other hand, the specular reflection component of sample 8 is directly reflected on the sample surface lj (directly reflected and exits the integrating sphere from the light entrance window W1, and is magnified 11 (only the reflected component is repeatedly reflected within the integrating sphere). The light q1 exits from the light exit window WO and enters the photodetector.
/(Reflection measurement strip of 1 is 1, γ is 1, Fig. 1B is R
The intestine a of d/'o measurement is not shown 1, and this 1. ! , S case, a white plate Sw is placed in the sample window Ws1, and the light Q, I: e'
The sample S is placed in the sample El window Ws2 facing tWn1))
With this arrangement, the sample S is illuminated by the multi-reflected beam of light within the integrating sphere; (1,
Figure 2 shows another embodiment of the present invention, which is capable of measuring RLf/I) and R(1/o. In this embodiment, Window of integrating sphere I~VO2~■81°Ws 2; Three of them are provided at the end of the orthogonal IF!1 diameter of the integrating sphere, but the light entrance window Wi is T' with respect to the diameter passing through WSl. They are provided at opposite positions, the incident optical axis and the output optical axis are obliquely intersecting, and the incident optical axis is off the center of the integrating sphere 1. When the sample IS is placed between the windows and Vsl in this il and J formation, and the white board Sw is placed on 'l:, Ws 2, the sample:[ receives direct illumination tilted by the integrating sphere incident light, and the sample:[ Since the specularly reflected light from 5 is incident on the inner surface of the integrating sphere ■, the photodetector I has a mirror + T
A total reflection component including the j7 reflection component, the widening ft, and the reflection component is incident, and a measurement of x<'7'10 is performed. Also tVsl
If a white board (Sw') is placed at Te Rd /
A measurement of o is made.

FIG. 3 shows still another embodiment of the present invention, in which 1 f/
1. ) and U R (115 measurements are made. Here δ
It's a test! It is said that the reflected light is measured in a direction tilted 66 from +i. This river sound, L'1 minute'' incident of I>'O'f'llll c! : It is oblique to the output q1 light and can be seen. 'sl law, Fjj + j, f's angle is A, the angle between the output optical axis and the normal to the window tV s 2 is 1, place the sample in the window \\'sl, and WS 2 ni l′
l board 4 - When placed, R<f)/I)) will be determined concavely 1,
Window WS I has the above-mentioned 2nd. f in each example of the th, 'xi'
And O-J is i! i-tsu 5° 01 ■ 1 angle is adopted 7, condensing) 1', academic system 17 may be omitted, use the crab shape and number of a hand full j to guess Reader/
1: In Otsu (~'82's lap N, the first part is unnecessary), a person (11 shi? 1g, ・hoof is required).

This π1 bright reflection 6 (: 1 constant 4?! ~ The pith is 1-excellent configuration, and the light (0 mi output device and Marugame 1 are put in! No need to get js<, the sample [and the white board and Just by changing the 7' position of Rt, + / (1 or Ro / I),
R'f/1) and R(l/(l or R1,)/'
(1.

Two types of reflection measurements such as RI') //cf) or t'+J
it-: There is a hair (1j or Hiro-1')
4j Tongue tJIi: 'cm material (・1 or deep (Itsu's (! v Inexpensive and simple rli in color reflection measurement,
l'J: E・,・）author τ, their (I book S1:
In order to reveal the special features and plans of UJ, the present invention is the first to reveal that the detection field and light source do not move at all in two different measurements. , N or L゛, bi [j secondhand (~ with η1, a light emitter like 1mi J(' f, 1'<
, spectroscopy) It is possible to use a 1 part 1 degree meter, and 1 part 1 degree meter, and 1 part 1 degree meter, and 1 part 1 degree meter.
1st class measuring device or white vinyl, ,il,■j+! When performing one measurement under white light illumination using
In J2, there is a hammer-colored one, but Akira Kio's Kio-irobi illumination becomes itJ function, and the deep-brown color of sample ゛1 is J:'i.
(J or itJ Noh.However, the present invention is white (!v
Light 1! j f depends on self a+j+', i is t measurement method in light.
Of course, measurement using color illumination is also possible.
In the case of 1 cl/o measurement, the same B indicates the lift a of 1 cl/o measurement, and FIGS.
3, which is the 11th diagram of the 13th embodiment, ■... Integral, ', <-, \Vi, Wo, \■s
l, ~'1' S2- TJ'j sphere window, I)・
・・Light detection, ■, ・・・Light condensing) 16 systems, ＋st
'1.13F2...Height full.

Daitanukito Patent Attorney 111' Ito Tsume 149-

Claims (1)

[Claims] [(°1 minute j) In the plane including the incident optical axis and the front of the output Qt゛ Here, a total of four windows are provided at the places where these solo frames (j') penetrate the 1 minute sphere, and these One of the windows is a light entrance window, and the other window adjacent to that window is a 9-inch window,
Place the sample in one of the remaining two windows and 1' in the other.
-1 board and enter the position of the sample and the white board/i
7) 2-type reflection measurement device that allows two types of reflection measurement by adjusting the angle of +1° 1 minute.