JPS6129724A - Colorimetric method - Google Patents

Abstract

PURPOSE:To eliminate the shadow of the fluff, etc. on a sample surface and to make colorimetry with high accuracy by pressing the sample surface to a transparent body to smooth the fabric, applying the irradiation light from an integrating sphere thereto and measuring the color of the sample surface. CONSTITUTION:A transparent glass plate 4 or the like is provided in the aperture window 2 of the integrating sphere. The fluffy fabric sample 3 such as carpet or blanket is pressed by a pad 5 to the glass plate 4 to smooth the ruggedness. The irradiation light is applied from the integrating sphere 1 to the sample 3 and the reflected light thereof is received by a spectroscope A by which the color of the sample 3 is measured. Even if the sample surface is rugged, the measurement is made after such surface is smoothed and therefore the colorimetry with high accuracy is made possible without the change in the measured value by the shadow.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application 1] The present invention relates to a color measurement method using an integrating sphere type colorimeter.

[Prior art and its problems] In an integrating sphere type colorimeter, the sample to be color measured (hereinafter simply referred to as the sample) is illuminated from all directions and the reflected light from the sample is measured. Even if the surface of the fabric is uneven, such as fabric, it is well-illuminated, there is little change in the measurement location due to shadows, stable results can be obtained, and there is an advantage that the measurement can be performed in one measurement direction.

However, even with this type of colorimeter, carpet,
In the case of brushed items such as blankets or loose m-fiber products, the surface irregularities are too large and accurate measurements cannot be made.

In the case of the above-mentioned type of measurement, this is as in the 31st m.
Even if the sample is pressed against the opening window (2) formed on the integrating sphere (1), the fluff extending from the surface of the sample fabric may be uneven and the integrating sphere (
1) This is because the irradiation light causes a shadow part to appear, and the measurement value changes significantly depending on how the shadow appears.

[Technical Issue wI] In such color measurement, an object of the present invention is to prevent shadows caused by one hair foot from occurring in order to accurately measure the color of a sample with a markedly uneven surface. .

[Means] Technical means of the method of the present invention for solving the above problems
, 1Nll on the oblique surface of the Ura Mahira layer or Banmeiha.
The reason is that it is colored I.

[Effect 1 ” The technical measures described in Section 2 act on the following measurements:

The bristles on the sample surface are pressed against the fabric side by the transparent body, and the significant unevenness on the sample surface disappears, resulting in a smooth surface.

Therefore, when the irradiation light is applied to the sample surface through the transparent body, no shadow is generated on the sample surface, and reflected light that is not affected by the shadow is obtained from the sample surface.

[effect] The present invention has the following unique effects.

Even if the sample surface has a rough surface, this will be smoothed and no shadows will appear in the irradiated light, so changes in measured values due to shadows will be reduced, allowing direct irradiation to the sample with less unevenness. Accurate measurements can be made in the same way as when shining a light.

Although it may be possible to smooth the surface by applying special treatment to the sample surface, according to the above configuration of the present invention,
Since the sample is simply pressed against a transparent body, there is an advantage that the surface of the sample can be made smooth, and furthermore, a part of the product can be used as a sample as it is.

[Example] Hereinafter, an example of the present invention will be described based on FIGS. 1 and 2.

In this embodiment, a glass plate (4) is used as the transparent body, and this glass plate is provided in the opening window (2) of the integrating sphere (1) of the device similar to the conventional example described above. This opening window is closed.

A rotatable suppression means is provided on the surface of the second device where the opening window is provided, and is configured to press the pad (5) against the transparent glass plate (4) with a predetermined pressure. There is.

Once the suppression means is rotated and removed from the aperture window (2)', the sample (3) is attached to the glass plate (4) provided in the aperture window (2), and then the suppression means is returned to its original position. The sample (3) is brought into a state where it is pressed against the glass plate (4) by the command (5), and if the colorimeter is operated in this state, the desired measurement can be performed.

In the above embodiment, the output from the sensor in the spectrometer (A) built into the measuring device is calculated and displayed as a graph on the screen of the computer (C), and the measurement results are can be displayed in an easy-to-understand format.

Here, the output from the sensors in the spectroscope (A) also includes the amount of reflection from the surface of the glass plate (4), which is also a transparent body, but this amount of reflection does not reflect any spectrum of light. Since it is also constant, the computer (C)
When performing calculations, it is sufficient to cut this and display it on the screen, so that only the spectral reflectance from the sample surface can be measured and displayed on the screen.

In addition, as mentioned above, the amount of reflection from transparent objects is cut.

In other words, the 0 point iA adjustment can be done by using other known methods.

It goes without saying that transparent films, transparent plates made of plastic, etc. can be used. Furthermore, if this transparent body is made removable, if the sample surface has few irregularities,
Measurements can be made in the same way as before, and a transparent body can be used if necessary.

As shown in Figure 1, by using a transparent body, the relative position between the sample (3) and the integrating sphere (1) in the sample mounting aperture of the colorimeter changes compared to when the transparent body is not used. Although the value will change, in order to minimize the change in the measured value due to the influence of this transparent body, it is preferable to keep the distance between the integrating sphere (1) and the sample (3) within 0.3 mri. More preferably, it is set within 0.2I.

For example, as shown in Figure 1, when attaching a transparent body to the outside, the thickness of the transparent body must be 0.3 mm or more than 0.2 mm.
It is preferable that it be below, as shown in Figure 2.
In the case of a structure in which the surface side of the cut body is aligned with the aperture window of the integrating sphere (1) and the entire body is thrown into the integrating sphere (1), the thickness of the transparent body must be within 111111 mm in any case. is preferable, and most preferably within Q, 3 m.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram of an embodiment of the method of the present invention, Fig. 2 is a modification thereof, and Fig. 3 is an explanatory diagram of a conventional example. Reference opening window (3)・
・φ sample (4)...Crow plate (5)--Pad

Claims (1)

[Claims] A color measurement method using an integrating sphere colorimeter, which is characterized in that the surface of the sample to be measured is brought into pressure contact with a smooth transparent body on both sides.