JP2001027604A - Gloss meter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To quantitatively measure the gloss caused by the surface properties of an object to be inspected such as hair, the skin, a fiber or cloth on the basis of the intensity of regularly reflected light and the intensity of irregularly reflected light. SOLUTION: When a regular reflection light source L1 and an irregular reflection light source L2 are successively allowed to light, the difference between the intensities of irradiation lights of the respective light sources L1, L2 is measured by the calibration light receiving element DC arranged at a measuring point P and, next, when an object to be inspected is placed at the measuring point and the light sources L1, L2 are successively allowed to light, the intensity of regularly reflected light and the intensity of irregularly reflected light are measured by the measuring light receiving element Dm arranged on the reflected light axis X3 of the irradiation light of the regular reflection light source L1 and, since the intensities of the respective reflected lights are corrected on the basis of the difference between them, a measuring error is not almost generated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a luster meter for quantitatively measuring luster caused by the surface properties of a subject such as hair, skin, fiber, cloth and the like.

[0002]

2. Description of the Related Art Various shampoos, hair rinses, hair packs, and other hair cosmetics are manufactured and sold according to the quality of hair in order to maintain the beauty of hair. Nurses and salespeople look at customers' hair, judge the quality of their hair based on their experience, recommend the best shampoo and hair cosmetics, and give advice on how to use them.

[0003] The quality of hair is mainly determined based on the degree of gloss, and the gloss depends on the roughness of the surface. Specifically, is the cuticle formed on the surface of the hair clean and uniform without peeling? It depends on whether or not. Therefore,
If you can measure the gloss quantitatively, you can objectively know the quality of the hair, not only can give more appropriate advice to customers, but also because of the use of the hair cosmetics The effect can also be objectively confirmed.

[0004] Optically, it can be said that the greater the reflection of light, the glossier it is, but there are two types of light reflection: specular reflection and irregular reflection. Specular reflection is reflection that obeys the law of reflection such as specular reflection when viewed macroscopically on a reflection surface, and diffuse reflection is reflection that is scattered in a direction other than the reflection angle on the reflection surface. And, according to the study of the present inventor, there is a correlation between the ratio of the specular reflection light intensity to the irregular reflection light intensity, and the luster felt by appearance, and in this regard, the luster and the glossiness are extremely similar. It has been found.

[0005] The glossiness is measured by a glossmeter as shown in FIG. This gloss meter has a measuring point 52 for positioning the subject at the center of an integrating sphere 51 whose inner surface is painted white.
Is formed, and a light source 53 for irradiating light at a predetermined incident angle toward the measurement point 52 is provided.
The light receiving element 5 for measuring the intensity of the regular reflection light is placed on the reflection optical axis 54 when the light emitted from the light source is reflected regularly at the measurement point 52.
5 and a light receiving element 56 for measuring the intensity of diffusely reflected light is disposed vertically above the measurement point 52.

According to this, the intensity of specular reflection light can be measured by the light receiving element 55 and the intensity of irregularly reflected light can be measured by the light receiving element 56, so that the present invention can be applied to gloss measurement. In this case, the gloss does not need to be strictly measured in accordance with JIS as in the case of the glossiness. Therefore, for example, a simple configuration in which the integrating sphere 51 is omitted can be used as a gloss meter.

[0007]

However, the light source 5
Since the regular reflection light intensity and the irregular reflection light intensity of the light emitted from 3 are measured using the two light receiving elements 55 and 56,
There is a problem that a measurement error occurs due to a difference in sensitivity between the light receiving elements 55 and 56.

For this purpose, a reference reflector whose specular reflectance and diffuse reflectance have been measured in advance is arranged at a measuring point 52, light from a light source 53 is irradiated on the reference reflector, and the reflected light intensity is measured by each of the light receiving elements 55, 55. The measurement is performed at 56, and the difference between the sensitivities of the light receiving elements 55 and 56 is corrected based on the regular reflectance and the irregular reflectance. However, if the reference reflector is soiled, it cannot be corrected correctly.

Accordingly, it is a technical object of the present invention to provide a method for quantitatively measuring the gloss of a subject without errors based on the intensity of specular reflected light and the intensity of irregularly reflected light.

[0010]

According to the present invention, there is provided a light source for regular reflection and a light source for irregular reflection which irradiate light at different angles with respect to a measurement point on which a subject is located, At the measurement point, a light receiving element for calibration for receiving irradiation light from each light source and measuring the irradiation light intensity is arranged, and when the test object is positioned at the measurement point, it is specularly reflected by the test object. A light receiving element for measurement for measuring the light intensity of the reflected light from the subject is arranged on a reflection optical axis of the light source for regular reflection to be performed, and the light receiving element for calibration is emitted by sequentially lighting the light sources. Are directly illuminated to measure the respective irradiating light intensities, and the respective light sources are sequentially turned on in a state where the subject is positioned at the measuring point, whereby the specular reflected light intensity and the irregularly reflected light intensity are measured by the light receiving element for measurement. Measure and calculate the reflected light intensity comparison value by correcting and comparing the specular reflected light intensity and the irregularly reflected light intensity with the respective irradiation light intensities, and refer to a preset reflected light intensity comparison value-gloss value conversion table. And reading out a gloss value corresponding to the reflected light intensity comparison value and displaying the value.

According to the present invention, when the regular reflection light source and the irregular reflection light source for irradiating light from different angles with respect to the measurement point where the subject is located are sequentially turned on, the calibration light reception arranged at the measurement point can be obtained. The element measures the difference in the irradiation light intensity of each light source, and then turns on each light source at the measurement point of the subject, and the light receiving element for measurement arranged on the reflection optical axis of the irradiation light of the light source for regular reflection Thus, the intensity of the regular reflection light and the intensity of the irregular reflection light are measured.

A reflected light intensity comparison value is calculated by correcting each reflected light intensity measured by the measuring light receiving element with each irradiation light intensity measured by the calibration light receiving element and comparing the corrected values. Set reflected light intensity comparison value-
A gloss value corresponding to the reflected light intensity comparison value is obtained with reference to the gloss value conversion table, and the value is displayed.

At this time, since the intensity of the specular reflected light and the intensity of the irregularly reflected light are measured by one measuring light receiving element, no measurement error is caused by a difference in sensitivity of the light receiving elements. Also,
The difference in irradiation light intensity between the regular reflection light source and the irregular reflection light source is measured by one calibration light receiving element arranged at the measurement point, and each reflected light intensity is corrected based on the measurement result. There is no measurement error caused by the use of.

[0014]

Embodiments of the present invention will be specifically described below with reference to the drawings. 1 is a block diagram showing a schematic configuration of a gloss meter according to the present invention, FIG. 2 is an external perspective view of the gloss meter, FIG. 3 is a flow sheet showing a processing procedure thereof, and FIGS. 4 and 5 show another embodiment. It is a perspective view.

In the gloss meter 1 shown in FIGS. 1 and 2, an optical system 3 for measuring the regular reflection light intensity and the irregular reflection light intensity of a subject such as hair is formed on the tip side of an elongated stick-like grip 2.

The optical system 3 includes a light source L ₁ for regular reflection and a light source L ₂ for irregular reflection such as a blue LED and a light receiving element Dm for measurement.
And a stage 5 on which a calibration light receiving element Dc is disposed. Between the head unit 4 and the stage 5, there is a gap serving as a guide groove 6 having a width of 1 to 2 mm for inserting a subject. Is formed.

The regular reflection light source L ₁ and the irregular reflection light source L
₂ illuminates each of the illuminating optical axes X ₁ , X ₁ ,
X ₂ is arranged so as to intersect at the measurement point P, on the measuring light receiving element Dm reflection optical axis X ₃ of the specular reflection light source L ₁ which is regularly reflected by the surface of the object placed in the measuring point P Are arranged.

In this embodiment, the light source for regular reflection L ₁ and the light source for irregular reflection L ₂ are arranged along a direction perpendicular to the longitudinal direction of the grip 2, and the light source for regular reflection L ₁ is connected to the measuring point P. a position irradiated with light at 45 ° towards the, also is disposed at a position to be irradiated with light from directly above the irregular reflection light source L ₂ toward the measuring point P.

The stage 5 has a measurement point P
Position, each light source L₁, L _TwoDiffuses and transmits the light from
A diffusion plate 7 for disposing the calib is provided below the diffusion plate 7.
A light receiving element for translation Dc is provided.

At the rear end side of the grip 2, there is provided a control device 8 for controlling the optical system 3 and obtaining a gloss value based on the measurement results of the light receiving elements Dc and Dm. The control device 8 includes a drive circuit 10 that sequentially turns on the light sources L ₁ and L ₂ when a switch signal is output from the main switch 9 a and the measurement switch 9 b, and a switch signal is output from the main switch 9 a. A light-receiving element switching circuit 11 that activates the light-receiving element Dc for calibration at the time and activates the light-receiving element Dm for measurement when a switch signal is output from the switch 9b for measurement;
An arithmetic processing unit 12 for obtaining a gloss value according to a predetermined procedure based on the light intensity measured by each of the light receiving elements Dc and Dm, and a reflected light intensity comparison value-gloss preset with a gloss value corresponding to the reflected light intensity comparison value. Value conversion table and light receiving elements Dc, D
Storage device 13 for storing necessary data such as the measurement result of m
And a display 14 for displaying the gloss value obtained by the arithmetic processing unit 12.

As shown in FIG. 3, the processing procedure in the control device 8 determines whether or not the main switch 9a is pressed in step STP1, and when the main switch 9a is pressed, the processing is started, and the calibration is performed in step STP2. Deployment photodetector Dc is actuated, regular reflection light source L ₁ and is lit irregular reflection light source L ₂ successively at step STP3, the irradiation light intensity S ₁ of people each measured in the calibration light receiving element Dc, S ₂ Is stored in a predetermined storage area of the storage device 13 in step STP4.

In step STP5, it is determined whether or not the measurement switch 9b has been pressed, and in step STP6, it is determined whether or not the main switch 9a has been turned off. When the main switch 9a is turned off, the processing is stopped,
If not turned off, the process returns to step STP5.

Next, for example, when measuring the gloss of the hair, the required number of hairs are pulled out without cutting the hair, the hair is put into the guide groove 6 in a lightly stretched state, and the measuring switch 9b is turned on. migrated measured photodetector Dm to actuation, incident on the specular reflection light source L ₁ and diffused light source L ₂ are sequentially lit specular reflection light and diffuse reflection light from the hair sequentially measuring light receiving element Dm in step STP8 is, stores the measured light receiving element specular reflected light intensity measured by the Dm R ₁ and diffused light intensity R ₂ in a predetermined storage area of the storage device 13 at step STP9.

Then, the process proceeds to step STP10, calculates the gloss value and displays the result.
Return to In step STP10, the specular reflected light intensity R ₁ and diffused light intensity R ₂ stored in step STP9, by correcting and compared with the irradiation light intensity of each S _1, S ₂ stored in step STP5, for example, The reflected light intensity comparison value H is determined by the following equation: H = (S ₂ / S ₁ ) · (R ₁ / R ₂ ).

According to this, the difference in the intensity of the light emitted from each of the light sources L ₁ and L ₂ is corrected by S ₂ / S ₁ , and the intensity of the regular reflection light when the light of the same intensity is emitted And the irregular reflection light intensity ratio.

Next, the gloss value T is directly proportional to the reflected light intensity comparison value H, and the equation T = αH (α is a proportionality constant) is stored in a reflected light intensity comparison value-shine value conversion table.
If the value of α is set so as to take a value from T = 00 to 99, the gloss value T can be displayed on the display device 14 in 100 levels.

[0027] Thus, according to this embodiment, since the reflection angle of the incident angle of the irradiation optical axis X ₁ of the regular reflection light source L ₁ and the reflected optical axis X ₃ are equal, the irradiation from the regular reflection light source L ₁ The intensity of the specular reflection light can be measured with the generated light, and the light source L ₂ for irregular reflection can be measured.
Since the reflection angle of the reflection optical axis X ₃ and the incident angle of the irradiation optical axis X ₂ of the unequal, it is possible to measure the diffuse reflection light intensity in the light emitted from the diffuse light source L _2.

Since the intensity of the specular reflected light and the intensity of the irregularly reflected light are measured by one measuring light receiving element Dm, no measurement error occurs due to the difference in the sensitivity of the light receiving elements. In addition, since the irradiation light intensity of each light source L ₁ and L ₂ is measured by one light receiving element for calibration Dc, and each reflected light intensity is corrected based on the measurement result, two light sources L _{1 and} L _{2 are used.} , nor causing a measurement error due to the use of L _2.

The regular reflection light source L ₁ and the irregular reflection light source L
_2, the measurement light receiving element Dm, the irradiation optical axis X ₂ of the irradiation optical axis X ₁ of the regular reflection light source L ₁ and irregular reflection light source L ₂ intersect at the measurement point P, a the irradiation optical axis X _1, measured Light receiving element D
If the reflective optical axis X ₃ is the optical axis of the m is the relationship between the incident angle and reflection angle with respect to the measurement points P, the positional relationship is arbitrary.

The equation for calculating the reflected light intensity comparison value is:
The expression is not limited to the above expression, and any expression that can compare the magnitude of the irregular reflection light intensity and the regular reflection light intensity can be adopted. The gloss value may be stored as a numerical table. Further, the gloss value is not limited to the case where it is digitally displayed using numbers on the display 14 but may be the case where it is displayed in an analog manner.

In the above description, the head unit 4 on which the light sources L ₁ and L ₂ and the light receiving element Dm for measurement are disposed, and the stage 5 on which the light receiving element Dc for calibration is disposed are gripped by the grip 2.
However, the present invention is not limited to this. For example, as shown in FIG. 4, the stage 5 is formed in a clip type that can be opened and closed with respect to the head unit 4. The subject may be held between the head unit 4 and the stage 5. In this case, the calibration light receiving element Dc is formed so as to advance and retreat with respect to the measurement point P by opening and closing the stage 5. .

Further, as shown in FIG.
Is formed so as to be detachable from the head unit 4, measurement is performed with the stage 5 mounted on a thin subject that can be inserted into the guide groove 6, and a stage is mounted on the subject that cannot be inserted into the guide groove 6. 5, the head 4 can be directly pressed against the subject to measure. In this case, if the electrode (not shown) formed on the head part 4 and the electrode 21 formed on the stage 5 are brought into contact with each other when the stage 5 is mounted on the head part 4, the stage 5 can be detached. In this case, a code for connecting the calibration light receiving element Dc disposed on the stage 5 and the control device 8 is not required.

Further, the subject for quantitatively measuring the gloss caused by the surface properties is not limited to the hair, but can be any object such as skin, fiber or cloth.

[0034]

As described above, according to the present invention, when measuring the regular reflection light intensity and the irregular reflection light intensity of the respective lights emitted from the regular reflection light source and the irregular reflection light source, each reflected light is measured. Since the intensity is measured by one measuring light receiving element, there is no measurement error due to the difference in sensitivity of the light receiving elements, and the irradiation light intensity of each light source is measured by one calibration light receiving element. Since each reflected light intensity is corrected based on the measurement result, there is no measurement error caused by using two light sources, and the gloss of the subject is quantitatively measured without error based on each of these measured values. It has an excellent effect that it can be done.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a schematic configuration of a gloss meter according to the present invention.

FIG. 2 is an external perspective view of a gloss meter.

FIG. 3 is a flow sheet showing the processing procedure.

FIG. 4 is a perspective view showing another embodiment.

FIG. 5 is a perspective view showing another embodiment.

FIG. 6 is an explanatory diagram showing a gloss meter.

[Explanation of symbols]

1 ... gloss meter 3 ... optical system 4 ... head unit 5 ... stage P ... measurement points 6 ... guide groove L ₁ · · regular reflection light source L ₂ · · irregular reflection light source X ₁ , X ₂ ··· Irradiation optical axis X ₃ ····· Reflection optical axis Dm ··· Measurement light receiving element Dc ··· Calibration light receiving element 8 ··· Controller

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Hiroshi Misawa 4-9-1-1, Shirahata, Urawa-shi, Saitama 2nd Kasuga Building F-term (reference) 2G059 AA02 EE02 FF08 GG03 MM10 MM12 PP04

Claims (4)

[Claims] 1. A measuring point (P) for positioning a subject
A light source for regular reflection (L ₁ ) and a light source for irregular reflection (L ₂ ) for irradiating light at different angles with respect to the light source are provided, and the measurement point (P) is irradiated from each light source (L ₁ , L ₂ ) A calibration light-receiving element (Dc) for receiving light and measuring the intensity of the irradiated light is provided, and when the subject is positioned at the measurement point (P), the light is regularly reflected by the subject. A measuring light receiving element (Dm) for measuring the light intensity of the reflected light from the subject is arranged on a reflection optical axis (X ₃ ) of the reflection light source (L ₁ ), and each of the light sources (L ₁ , L ₂ ) Are sequentially turned on to directly irradiate the calibration light receiving element (Dc) with light to measure the respective irradiation light intensities. With the subject positioned at the measurement point (P), each of the light sources (L ₁ , L
₂ ) The light receiving element for measurement (D
m), the regular reflection light intensity and the irregular reflection light intensity are measured, and the regular reflection light intensity and the irregular reflection light intensity are corrected by the respective irradiation light intensities and compared to calculate a reflection light intensity comparison value, which is set in advance. A gloss meter comprising a controller (8) for reading a gloss value corresponding to a reflected light intensity comparison value with reference to a reflected light intensity comparison value-gloss value conversion table and displaying the value. 2. The gloss meter according to claim 1, wherein a guide groove (6) for guiding the subject to the measurement point (P) is formed. 3. The light receiving element for calibration (D)
The stage (5) on which c) is arranged is a measurement point (P) of the head section (4) on which the light source for regular reflection (L ₁ ), the light source for irregular reflection (L ₂ ) and the light receiving element for measurement (Dm) are arranged.
2. The gloss meter according to claim 1, wherein the gloss meter is arranged so as to be capable of moving forward and backward. 4. A light receiving element for calibration (Dc) positioned at the measurement point (P) includes a light source for regular reflection (L ₁ ), a light source for irregular reflection (L ₂ ), and a light receiving element for measurement (Dm). 2. The gloss meter according to claim 1, wherein the gloss meter is detachably mounted on the disposed head part (4).