JPH06105223B2 - Optical surface property measuring device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for measuring the color, gloss, gloss and image clarity of paints, plastics, colored aluminum and the like.

[0002]

2. Description of the Related Art Industrial products such as paints, plastics, colored aluminum, and colored stainless steels have a great influence on the results of sales and price competition depending on the quality of the finished products. In particular, the color and luster of the appearance of automobiles, home appliances, etc.
In other words, the measurement of image clarity is an important issue in product control and inspection, and various methods are adopted and implemented in each industry.

Color and gloss are inseparable as a psychological effect on the visual sense, and the sense of gloss and the sense of gloss are related but independent from each other.
The image clarity expresses an aesthetic appearance that cannot be evaluated by gloss. In the case of industrial products in which the quality of the finished appearance greatly affects the sales, comprehensive and sufficient appearance control can be performed only by measuring all four of these optical surface characteristics.

Conventionally, color measurement is performed by a colorimeter using an optical system that satisfies the optical conditions of illumination and light reception specified in JIS (Japanese Industrial Standard) Z 8722 (method of measuring object color). ing.

FIG. 4 is a block diagram of an optical system of the 45 degree illumination vertical light receiving system which is frequently used for the measurement of the color of the painted surface in the optical system specified by JIS. In FIG. 4, the light from the light source 3 is extracted as light in the direction of 45 degrees, which is symmetrical to the straight line 7 passing through the center in the same plane, and is made into parallel light beams by using the collimator lenses 10a and 10b, respectively, and both parallel lines are drawn. Through the reflection mirrors 11a and 11b fixed in the middle of the optical path of the bundle, the sample 4 is bent from the direction of 45 degrees with respect to the straight line 7 by irradiating the surface of the sample 4 at 90 degrees. A light diffusing cylinder 1 that captures the reflected light with a condenser lens 16
The light having the color of the sample 4 collected on the bottom surface of the sample 5 and accumulated in the light diffusion tube 15 is measured by the tristimulus value XYZ light receiver 17. The straight line 7 coincides with the normal line passing through the center of the measurement surface of the sample 4.

The measurement of specular gloss is specified by JIS (Japanese Industrial Standard) Z 8741 (specular gloss measurement method),
It is said that the glossiness is measured by selecting the angle depending on the type of the measurement object under the conditions of the incident angle and the light receiving angle of ± 20 degrees, ± 45 degrees, ± 60 degrees, ± 75 degrees and ± 85 degrees. ing. When measuring a painted surface, the incident angle to the measured surface is 60
And the angle of reflection from the measurement surface of 60 degrees
Generally, specular reflection light in the 0 degree direction is measured, and FIG. 5 is a diagram showing the principle of the configuration of the optical system.

In FIG. 5, the light from the light source 3 is condensed by the condenser lens 23c on the slit-like diaphragm plate 24b, where it becomes a constant light source under the same conditions, and the straight line 7
The sample 4 is irradiated at an angle of 60 degrees with respect to the (normal line). The light receiver 27 is arranged so as to receive the light in the specular reflection direction (the specular reflection light in the direction of 60 degrees with respect to the straight line 7) in the reflected light of the sample 4. Further, the light receiver 27 is provided with a specular gloss stop 31b whose aperture size is defined according to the light receiving angle (arranged at the position indicated by the dotted line in FIG. 5), and specularly reflected light from the sample 4 is provided. Direction light is condensed by the condenser lens 23d and imaged in the aperture of the diaphragm 31b.
It is measured by the photodetector 27 for gloss measurement.

The luminous gloss meter is ISO / TC79 / SC2 /
It has been studied by the WG and the optical conditions basically have the same structure as the optical system used for the measurement of the specular gloss, and the specular reflection is excluded from the reflected light from the sample, and the reflected light in the vicinity of the specular reflection light is excluded. It is something to measure. Therefore, instead of the above-described specular gloss stop 31b, the aperture of this stop is closed, and the other part (corresponding to the part closed by the specular gloss stop 31b) is used as an open part. The measurement is performed under the condition that the gloss diaphragm 32b is replaced. Therefore, the principle diagram of the optical system of the visual gloss meter is the same as the principle diagram of the optical system of the specular gloss meter of FIG. 5, and the shape of the diaphragm is as described above.
It is only the luminescent gloss diaphragm 32b having an inverted shape.

The measurement of image clarity is specified by JIS H8686 (Testing method for image clarity of anodic oxide films of aluminum and aluminum alloys). The optical conditions of the incident angle and the light receiving angle with respect to the sample are 45 degree illumination, 45 degree illumination, and 60 degree reception. Lighting 60
Light reception is often used.

In FIG. 6, the principle of image clarity is that the light from the light source 3 is passed through the minute slit 43, and is collimated by the collimator lens 10d into a parallel light beam, which is projected onto the surface of the sample 4. The projected image is distorted due to minute irregularities on the surface of the sample 4 or minute warpage. In a state where the reflected light of the projected image having the distortion is formed by the condenser lens 23e on the image clarity measuring optical comb,
By moving the optical comb pattern 33b to the left and right, light is changed to the light receiver 27 having the same specular gloss as the specular gloss through the pattern of the dark portion and the bright portion on the image-forming optical comb pattern 33b, and the maximum of the transmitted light of the bright portion is obtained. The value M and the minimum value m of the transmitted light caused by the leakage of light in the dark part are measured, respectively, and (M-
m) ÷ (M + m) × 100 The value of image clarity is obtained by the calculation.

[0011]

In order to accurately and sufficiently control the appearance of industrial products with conventional measuring instruments and methods, it is necessary to use a colorimeter for color measurement and a specular gloss measurement. It was necessary to have four measuring instruments, a specular gloss meter, a visual gloss meter for measuring the glossiness of the visual sense, and an image clarity measuring instrument for measuring the image clarity.

Here, a particular problem is that even if the same sample is used, it is impossible to perform measurement at the same position when four measuring instruments are used.

In general, even if the measurement position is slightly deviated, the surface of the sample is uneven because of unevenness in color, unevenness, distortion, warpage and the like. On the other hand, in measurement, the sample must be replaced every time each measuring instrument is used, so it is almost impossible to always maintain the same position of the sample surface to be measured in any measuring instrument. In addition, inconsistency in the directionality of the measurement light with respect to the optical axis caused by replacement of the sample is unavoidable. Therefore, even if the intention was to measure the same location, different locations would actually be measured, and different evaluations could be performed on the same sample, and the evaluation was not reliable.

Particularly in the case of a coated plate or the like, chalking (chalking: a phenomenon in which the surface of the coating film becomes powdery) occurs on the surface thereof after outdoor exposure or after an accelerated weathering test using a weather meter or a fade meter. Chalking is not a problem in which surface defects such as fine coating unevenness are generally amplified and thus do not uniformly occur, and thus appear as a variation in various optical surface characteristic measurements and pose a problem. Therefore, when measuring the color, specular gloss, luminous gloss and image clarity of the choking surface, and then comprehensively evaluating the optical surface characteristics, the measurement points should be set to obtain the reliability of the evaluation. It is necessary to always be the same.

[0015]

[Table 1]

In Table 1, one sample (blue coated plate before the accelerated weathering test) was measured in the order of a colorimeter, a specular gloss meter, a visual gloss meter, and an image clarity measuring instrument, which was 5 The result is repeated. In the table, ΔE * ab represents the color difference between the first measured value and each of the second and subsequent measured values, and Δ represents the difference between the first measured value and the second and subsequent measured values.

Now, this measurement is carried out by moving the sample for each measurement, and the measurement is carried out with great care so that the measurement position of the sample does not change during each measurement.
As can be seen from E * ab (color difference) and Δ (difference), the measured values greatly vary. This must be recognized as a measurement error due to the measurement position. Even when the sample is not subjected to the accelerated weathering test as described above, it is impossible to evaluate the same measurement point by the method of moving the sample when measuring the above four kinds of optical surface characteristics. Become. Further, generally, it is necessary to carry out the operation of zero alignment and standard alignment (excluding the image clarity measurement) every time each measurement is performed, so that the measurement operation takes time including the labor of moving the sample.

Therefore, although it is necessary to perform measurement using a plurality of (four) measuring instruments as described above, the same measurement surface of the sample cannot be accurately maintained, and high-precision and accurate measurement evaluation cannot be performed. . Further, the measurement operation also requires repeated preparations for measurement such as zero alignment and standard alignment for each measuring instrument, which makes the measurement laborious.

Therefore, with one optical system, four kinds of optical surface characteristics of colorimetry, specular gloss, luminous gloss and image clarity can be continuously applied without moving the sample (without moving the measurement surface). It has been desired to develop a device that can measure by using this method.

[0020]

In order to solve the above-mentioned problems, (a) one light source for measurement is provided, and in a plane passing through the center of this light source, a straight line whose center line passes through the center of the light source. The light from the light source is taken out as two parallel light fluxes in the direction of 45 degrees, which are respectively defined as the first parallel light flux and the second parallel light flux, and these light fluxes are reflected at an angle of 90 degrees in the optical path of the first parallel light flux. In addition, a first reflecting mirror movably arranged to a position where the parallel light flux is not blocked is provided, and the parallel light flux is fixedly arranged in the optical path of the second parallel light flux so as to reflect the parallel light flux at an angle of 90 degrees. A first irradiating device provided with a second reflecting mirror so that when the first and second parallel light beams are reflected at an angle of 90 degrees, the intersections of the center lines of both parallel light beams are located on the straight line. And (a) the measurement surface of the sample is located at the intersection of the two parallel light beams. And the sample stage arranged to cut, (c)
A first light receiving device for color measurement, which receives diffused reflected light in the linear direction among reflected light of the sample when the sample on the sample stage is simultaneously irradiated with the first and second parallel light fluxes; D) When the first reflection mirror moves to a position where it does not block the first light beam, it is synchronized with this reflection mirror and moves between the light source and the second parallel light beam to block the light of the light source. A board,
(E) A third reflecting mirror is provided which reflects the first parallel light flux when the first reflecting mirror moves to a position where it does not block the first light flux. A second irradiation device arranged such that its center line coincides with the intersection of the center lines of the first and second parallel light fluxes and irradiates the straight line at an angle of 60 degrees; A diaphragm for glossy luster and a diaphragm for specular gloss arranged at a position to receive specularly reflected light in a direction of 60 degrees with respect to the straight line in the reflected light of the sample when the upper sample is irradiated with the third parallel light flux. And a second light-receiving device for movably providing a diaphragm pattern plate having an optical comb pattern for measuring image clarity, and switching the luminous gloss, specular gloss and image clarity by the movement of the diaphragm pattern plate. ) For measuring colorimetric, specular gloss, luminous gloss and image clarity It is composed of a controller having a computing memory circuit for determining the control the work and measurements 1
The optical system characteristic measuring device is characterized in that the above-mentioned four kinds of optical surface characteristics of the same measurement surface are measured by the optical system of the table without changing the measurement position of the sample.

[0021]

Since the above means is adopted, the reflecting mirror provided for bending one of the parallel luminous fluxes of the first irradiation device is moved to a position where the parallel luminous flux is not blocked, and the light shielding plate synchronized with this reflecting mirror is used. By blocking the other parallel light flux, the light source used in the first irradiation device can be used as the light source of the second irradiation device for measuring specular gloss, luminous gloss and image clarity. Further, since a diaphragm plate having a diaphragm for visual gloss, a diaphragm for specular gloss, and an optical comb for measuring image clarity is movably attached to the second light receiving device, the specular gloss, visual gloss and It is possible to receive light in three ways with image clarity. Further, by performing the operation for color measurement by the control device, the movement operation of the reflection mirror and the movement of the light shielding plate synchronized with this, and the movement operation of the diaphragm plate, the sample is not moved by one optical system. In addition, it is possible to continuously measure four kinds of optical surface characteristics such as color measurement, specular gloss, luminous gloss and image clarity.

[0022]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a basic configuration diagram for configuring one optical system 1 as an optical condition for measuring four kinds of optical surface characteristics of color measurement, specular gloss, luminous gloss and image clarity in the present invention. is there. 2 is a conceptual plan view particularly showing the relationship between the second irradiation device 19, the second light receiving device 26 and the sample 4 in FIG. 1. The diaphragm plate 24a and the second irradiation device 19 of the second irradiation device 19 are shown in FIG. 3 is an enlarged view of a diaphragm pattern plate 30 of the light receiving device 26. FIG.

In FIG. 1, the first irradiation device 2 is a light source 3
This is for irradiating the sample 4 with the light from the direction of 45 degrees, to receive the light in the vertical direction in the reflected light of the sample 4, to diffuse the light, and to receive the diffused light for color measurement.

In this structure, the light source 3 (12 V in this embodiment) is housed in the light source box 6 fixed to the bottom of the dark box-shaped case 5.
This is a light source box for extracting two luminous fluxes in the direction of 45 degrees that are symmetrical to the straight line 7 passing through the center of the light source 3 in a plane passing through the center of the light source 3 In FIG. 6, light flux extraction windows 8a and 8b are provided at two positions of 45 degrees with respect to the straight line 7.

As the optical paths of the two light fluxes, a first optical duct 9a and a second optical duct 9b, which have the same shape and have a prism shape whose center line lies in the plane and are bent at 90 degrees on the way, are used. The light extraction window 8 is provided on each side.
It is connected to a and 8b, and is arranged on the object with respect to the straight line 7.

Collimator lenses 10a and 10b are fixed to the two light ducts 9a and 9b, respectively, close to the light beam extraction windows 8a and 8b of the light source box 6, and the light beams extracted from the light source 3 are collimated into parallel light beams. I have to.

A first reflecting mirror 11a for reflecting a parallel light beam passing through the duct in the direction of 90 degrees is movably attached to the bent portion of the first optical duct 9a (details will be described later). Similarly, the second reflection mirror 11b is fixed (not movable) to the bent portion of the second light duct 9b. Therefore, the parallel light fluxes passing through both the light ducts 9a and 9b are not reflected by the first and second reflection mirrors 11a and 11b.
Each of the light beams is bent at 90 degrees by b, and the center lines of both light fluxes intersect the straight line 7 at an angle of 45 degrees. Further, both of the light ducts 9a and 9b are accurately adjusted so that the center lines of both the light ducts 9a and 9b are at the same point of the straight line 7. A condenser lens is provided at the other opening of each of the two light ducts 9a and 9b to narrow the parallel light flux reflected by the reflection mirrors 11a and 11b into a light flux of a predetermined size according to the measurement area of the sample 4. (Not shown)
Luminous flux diaphragms 12a and 12b having, for example, are detachably attached.

In the case 5, the measurement hole 13 of the sample 4 having the straight line 7 at the center is located at the target position with the light source 3. Sample 4
Is attached to the upper part of the outer surface of the case 5 such that the center thereof coincides with the measurement opening 13 and is exchangeably attached so that the sample 4 is irradiated through the measurement opening 13 at the intersection position of the two light beams.
On the sample table 14 having an opening corresponding to the size of the measurement surface of
The measurement surface is placed facing the light source 3.

Further, below the sample 4 and between the light source box 6 and the light source box 6, a light diffusing tube 15 having a straight line 7 as a center and a hemisphere connected to a cylinder is arranged as a first light receiving device. . The light diffusing tube 15 has a short focus lens 16 (a Fresnel lens is used in the present embodiment) in the cylindrical portion in order to receive light in the vertical direction in the reflected light of the sample 4 and focus it on the bottom. It was installed. The inner surface of the light diffusing tube 15 is coated with barium sulfate or the like to diffuse the light evenly, and the tristimulus values X, Y and Z are applied to the outer circumference of the hemisphere to extract the diffused light and measure the color. The light receivers 17 are separately attached.

In the first irradiating device 2 and the first light receiving device (light diffusing tube 15) thus constructed, the straight line 7 is 4
The light of the light source 3 extracted in the 5 degree direction becomes a parallel luminous flux, is bent in the 90 degree direction by the reflection mirrors 11a and 11b, is narrowed down to a luminous flux of a predetermined size, and the intersection of both parallel luminous fluxes on the straight line 7. The surface of the sample 4 located at is irradiated. Further, the reflected light from the surface of the sample 4 is condensed in the light diffusing cylinder 15 and diffused therein, and the diffused light is tristimulus value X,
The light is received by the Y and Z light receivers 17. The straight line 7 coincides with the normal line passing through the center of the measurement surface of the sample 4.

Next, an optical system for measuring specular gloss, visual gloss and image clarity will be described with reference to FIGS. 1 and 2.

The first reflecting mirror 11a attached to the bent portion of the first optical duct 9a is fixed on a mirror moving base 18a, and this moving base 18a has a generally known rack and pinion (not shown). It is possible to move linearly to the position where the parallel light flux is not blocked by using the technique (1). The first reflecting mirror 11a is a photo sensor (not shown) provided at both ends of the mirror moving table 18a.
By this, it is possible to maintain the predetermined position accurately.

The second irradiator 19 has an opening 20a for taking in the parallel luminous flux when the first reflecting mirror 11a is moved to a position where the parallel luminous flux is not blocked (moved to the dotted line position in FIG. 1). The center of this parallel light beam is the straight line 7
On the side opposite to the light source 3, a mirror box 21 provided with a third reflection mirror 11c fixed so as to reflect at an angle of 60 degrees, and reflected light of the third reflection mirror 11c opened in this box 21. A cylindrical duct 22a is attached to the opening 20b for passing through so that its center coincides with the center of the opening 20b. Also, the cylindrical duct 22
A condenser lens 23a for condensing reflected light is fixed to the aperture 20b side at the end of a, and a slit-like diaphragm plate 24a (24b in FIG. 2) having a very narrow width is provided at the focal position of the lens 23a. Is a plan view of the diaphragm plate 24a), and a collimator lens 10c for collimating the light passing through the slit into a parallel light flux is fixed to the other end. Further, the center line of the parallel light flux is accurately adjusted and fixed at a position where it coincides with the intersection of the two light fluxes of the first irradiation device 2.

In the middle of the second light duct 9b, the light source 3
A disc-shaped light-shielding plate 25 is arranged so as to shield the above light. The light blocking plate 25 rotates so as to block the light flux passing through the second optical duct 9b when the first reflecting mirror 11a moves to a position where the parallel light flux is not blocked by a motor (not shown). is there. The disk 25 can also be maintained at a predetermined position by a photo sensor (not shown).

The second light receiving device 26 receives the specularly reflected light component in the direction of 60 degrees with respect to the straight line 7 in the reflected light from the surface of the sample 4 irradiated by the second irradiation device 19. Second
The cylindrical duct 22b, which is on the same plane as the irradiating device 19 and has a condenser lens 23b fixed to the tip thereof, is provided in a light receiver box 28 in which a light receiver 27 (a silicon photocell is used in this embodiment) is arranged at the bottom. It is fixed together. Further, there is a partition plate 29 having a small opening at the focal position of the condenser lens 23b, and a diaphragm moving table 18b that moves horizontally by a rack and a pinion in contact with the partition plate 29, which is in contact with this partition plate 29a. A diaphragm pattern plate 30 (described later) fixed to the above is arranged.

In FIG. 2, the diaphragm pattern plate 30 has a rectangular slit-shaped diaphragm as a specular gloss diaphragm 31a and a circular gloss diaphragm 32a having the same shape as the specular gloss diaphragm at the center. It is a rectangular flat plate having a diaphragm provided with a light-shielding portion and an image-forming optical comb pattern 33a in which rectangular small slits for measuring image clarity are arranged in a comb shape. The diaphragm pattern plate 30 can also be maintained at a predetermined position by a photo sensor (not shown).

Therefore, the second irradiating device 19 is similar to the case of the first irradiating device 2 when the first reflecting mirror 11a moves to a position where it does not block the parallel light flux passing through the first light duct 9a. The parallel light flux reflected by the third reflection mirror 11c is irradiated onto the measurement surface of the sample 4 placed on the. At this time, since the parallel light flux passing through the second duct 9b is blocked by the light shielding plate 25, the surface of the sample 4 is irradiated with only the parallel light flux passing through the first duct 9a, and the second light reception. The device 26 can receive the reflected light of only the parallel light flux.

FIG. 3 is a diagram of the panel portion 35 of the control device 34 for performing the colorimetric measurement operation, the specular gloss measurement operation, the visual gloss measurement operation and the image clarity measurement operation. An arithmetic storage circuit (not shown) such as a microcomputer is built in the control device 34, and by pressing a corresponding switch on the panel portion 35, the above-mentioned four types of optical surface characteristics can be obtained. One of them is selected and controlled so as to perform a predetermined measurement operation.

The procedure for measuring a sample with the above-mentioned four types of optical surface characteristics and the operation at that time will be described below with reference to FIGS. 1, 2 and 3.

Here, 36 is a group of four kinds of optical surface characteristic selection switches, 37a is a colorimetric measurement, 37b is a specular gloss, 37
Reference numeral c is a luminous gloss and 37d is an image clarity selection switch. 38 is a zero adjustment switch, 39 is a standard adjustment switch, and 40 is a measurement switch. Reference numeral 41 is a group of numerical keys, which are used, for example, when inputting known X, Y, and Z values to measure the color difference from the measurement sample, and the display window 42 displays the measurement data. It is a liquid crystal panel.

(1) Zero adjustment operation: An operation for setting and storing an electric level zero line in an arithmetic storage circuit (not shown) in the control unit 34. Color measurement and specular gloss, visual gloss and Separately from the image clarity measurement. In the case of specular gloss, luminous gloss and image clarity measurement, since the second irradiation device 19 and the light receiver 27 are the same, for example, specular gloss measurement may be selected and performed once. For the operation, a dark box (not shown) is placed on the sample table 14 so that the measurement aperture 13 is not exposed to external light, and in the case of color measurement, the color measurement selection switch 37a is set to specular gloss, luminous gloss and mapping. In the case of measuring either of the sexes, the specular gloss selection switch 37b is pressed, and then the zero adjustment switch 38 is pressed.

When the colorimetric selection switch 37a is pressed,
The zero level of the XYZ light receiver 17 is stored by zeroing the colorimetric operation using the first irradiation device 2 and the first light receiving device. When the specular gloss selection switch 37b is pressed, the first reflection mirror 11a in the bent portion of the first light duct 9a moves to a position where it does not block the parallel light flux, and at the same time, the light shielding plate 25 causes the second light duct. It is rotationally moved to a position that blocks the parallel light flux that should pass through 9b. Further, in the second light receiving device 26, the mirror gloss diaphragm 31 of the diaphragm pattern plate 30.
a moves to the small opening position of the partition plate 29. Here, the zero level of the light receiver 27 is stored.

Now, the zero adjustment is for detecting the level of stray light of the apparatus by the light receiver and storing it in the arithmetic storage circuit. The stop 31 for specular gloss provided on the stop pattern plate 30 is used.
Although the aperture areas of the a, the glossy diaphragm 32a and the image-forming optical comb pattern 33a are different from each other, they do not cause a problem in measurement. Therefore, in the present embodiment, priority is given to simplicity of operation. The arithmetic storage circuit is configured so that any one of the three can be used. Of course, the arithmetic storage circuit may be configured to perform zeroing for each of specular gloss, luminous gloss, and image clarity.

(2) Standard adjustment: An operation for setting and storing an electric level standard line in the arithmetic storage circuit with respect to a standard value stored in advance, for color measurement, specular gloss and luminous gloss. Do it separately. It does not need to be done for image clarity. For the operation, the standard plate is applied to the measurement opening 13 of the sample table 14, the colorimetric selection switch 37a, the specular gloss selection switch 37b or the luminous gloss selection switch 37c is pressed, and then the standard matching switch 39 is pressed. At this time, the operations of the first reflecting mirror 11a and the light shielding plate 25 are the same as in (1) above, and the diaphragm pattern plate 30 also moves in correspondence with the respective specular gloss and luminous gloss selection switches 37b and 37c. Here, in the case of color measurement, the XYZ light receiver 17
Further, in the case of specular gloss and luminous gloss, the second light receiving device 26
Is measured by the light receiver 27 and the standard level is stored in the arithmetic storage circuit.

If the above operations (1) and (2) are carried out only once before the start of measurement, they are stored in the arithmetic storage circuit (not shown) in the control unit 34, so that this measurement is carried out after each measurement. No action is required.

(3) Measurement operation: After the operations of (1) and (2) are completed, the switch for selecting the optical condition to be measured from among the four optical surface characteristics is pressed, and then the measurement switch 40 is pressed. Unless the optical condition is changed, the measurement switch 40 may be pressed for each measurement for the subsequent operations. The operations of the first reflecting mirror 11a, the light blocking plate 25, and the aperture pattern plate 30 are the same as (1) and (2).

In the case of the image clarity measurement, the diaphragm pattern plate 30 is moved from point A to point B of the image clarity optical comb pattern 33.

[0048]

As described above, the reflecting mirror provided for bending one of the parallel luminous fluxes of the first irradiation device for color measurement is moved to a position where the parallel luminous flux is not blocked, and the reflecting mirror is moved. By blocking the other parallel light flux with the light shielding plate synchronized with the light source, the light source used in the first irradiation device can be used as the light source of the second irradiation device for measuring specular gloss, luminous gloss and image clarity. In addition, a diaphragm pattern plate having a specular gloss diaphragm, a luminous gloss diaphragm, and an optical comb pattern for image clarity can be moved, and four types of color measurement, specular gloss, luminous gloss and image clarity can be obtained. The optical surface characteristics can be measured with one optical system, and the zero and standard alignments of each optical surface characteristic can be stored, so that even if different optical surface characteristics are measured, the sample can be measured. Continuous measurement without moving Made to wear.

Therefore, since the operation required for the measurement can be simplified and the sample need not be moved, the measurement can be performed with each optical surface characteristic without the variation of the measurement result depending on the measurement position of the sample, and the reliability of the evaluation can be improved. Greatly improved.

[Brief description of drawings]

FIG. 1 is a basic configuration diagram of an optical system that enables measurement of color measurement, specular gloss, luminous gloss, and image clarity with one unit.

FIG. 2 is a conceptual plan view showing the relationship between the second irradiation device, the second light receiving device, and the sample in FIG.

FIG. 3 is a partial panel view of the control device.

FIG. 4 is a configuration diagram of a conventional 45-degree irradiation vertical light-receiving optical system.

FIG. 5 is a structural principle diagram of an optical system for measuring specular gloss and luminous gloss.

FIG. 6 is a structural principle diagram of an optical system for measuring image clarity.

[Explanation of symbols]

 1 Optical System 2 First Irradiation Device 3 Light Source 4 Sample 5 Case 7 Straight Line 9a First Light Duct 9b Second Light Duct 11a First Reflection Mirror 11b Second Reflection Mirror 11c Third Reflection Mirror 13 Measurement Open Hole 14 Sample stage 15 Light diffusing cylinder (first light receiving device) 16 Condensing lens 17 XYZ light receiver 18a Mirror moving table 18b Aperture moving table 19 Second irradiation device 25 Light-shielding plate 26 Second light receiving device 27 Light receiver 29 Partition plate 30 Aperture pattern plate 31a Specular gloss aperture 32a Visual gloss aperture 33a Image-combination optical comb pattern 34 Control device 35 Panel portion 36 Optical surface characteristic selection switch group 38 Zero adjustment switch 39 Standard adjustment switch 40 Measurement switch

Claims (1)

[Claims] 1. The color of a sample surface, specular gloss,
A device capable of measuring all of visual luster and image clarity,
(A) One light source for measurement is provided, and the light from the light source is extracted as two parallel luminous fluxes in the 45 ° direction, which are in the plane passing through the center of the light source and whose center line is a straight line passing through the center of the light source , A first parallel light flux and a second parallel light flux, respectively,
A first reflecting mirror is provided in the optical path of the first parallel light flux, which reflects the light flux at an angle of 90 degrees and is movable so as not to block the parallel light flux. A second reflecting mirror, which is fixedly arranged so as to reflect this parallel light flux at an angle of 90 degrees, is provided, and when the first and second parallel light fluxes are reflected at an angle of 90 degrees, the centers of both parallel light fluxes A first irradiation device in which the intersections of the lines are located on the straight line; (a) a sample table arranged so that the measurement surface of the sample can be located at the intersections of the two parallel light beams; A first light receiving device for color measurement, which receives diffused reflected light in the linear direction in the reflected light of the sample when the sample on the sample stage is simultaneously irradiated with the first and second parallel light fluxes; When the first reflecting mirror moves to a position where it does not block the first light flux, the reflection of this And (e) when the first reflection mirror moves to a position that does not block the first light beam, the light-shielding plate moving in synchronization with the light source and moving between the light source and the second parallel light beam to block the light of the light source. A third reflecting mirror for reflecting the first parallel light flux, the reflected light being a third parallel light flux, the center line of which coincides with the intersection of the center lines of the first and second parallel light fluxes, and A second irradiation device arranged so as to irradiate at an angle of 60 degrees with respect to the straight line; and (f) when the sample on the sample stage is irradiated with a third parallel light beam, the straight line in the reflected light of the sample It is arranged at a position for receiving regular reflection light in the direction of 60 degrees,
A diaphragm pattern plate having a diaphragm for visual gloss, a diaphragm for specular gloss, and an optical comb pattern for measuring image clarity is movably provided. By moving the diaphragm pattern plate, the luminous gloss, specular gloss, and image clarity are switched to receive light. And a control device having an arithmetic memory circuit for controlling the operation for measuring (g) colorimetry, specular gloss, luminous gloss and image clarity and for obtaining a measured value. With one optical system, without changing the measurement position of the sample,
An optical surface characteristic measuring device characterized by measuring the above-mentioned four types of optical surface characteristics.