JPH079382B2 - Color distribution color measuring device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to photochromism (a phenomenon in which when a substance is exposed to strong light, the color of the substance discolors, and when light is blocked, it returns to its original state).
The present invention relates to a colorimetric device for examining whether or not a material that has been subjected to a chemical treatment so as to cause the chemical treatment is uniformly subjected to the chemical treatment.

[Prior Art] To examine whether or not the chemical treatment of a sample that has been chemically treated to cause photochromism is performed uniformly,
Conventionally, the following procedure methods have been generally adopted.

First, a sample cut out from a test material for measurement is irradiated with light in a specific wavelength range (generally in the near ultraviolet region of 300 to 400 nm) to cause discoloration of the sample.

Next, each point on the sample is quickly color-measured to obtain a color distribution, that is, color unevenness, and it is determined whether the chemical treatment is uniform.

By the way, in the above, as a device for irradiating the sample with light in a specific wavelength range, for example, a light resistance tester 37 defined in JIS B 7754 is used. FIG. 4 is a schematic configuration diagram of an example of the testing machine 37. In the figure, this device has a xenon arc lamp 39 as an artificial light source in the center of a test tank 38, and a sample 3'having a size of about 70 x 150 mm mounted on a rotating frame 40 rotating around it. It is configured to hang the holder 41.

Further, in the above, as a device for measuring the color of each point of the sample, for example, a colorimeter 8'having optical conditions specified in JIS Z 8722 or the like is used. FIG. 5 is a schematic configuration diagram of an example of this colorimeter 8 ', which has an optical system that complies with the optical condition of condition d (od system) of JIS Z 8722. In the figure, in this apparatus, a light projecting unit 4'and a light receiving unit 5'are arranged in a dark box 42 which is not affected by external light. A sample 3'having a size of about 100 x 100 mm or less is placed immediately before the entrance aperture 43 of the integrating sphere 17 'between the two', and the parallel light flux from the light projecting portion 4'transmits the sample 3 '. The transmitted light is received by the light receivers 20 'of the three extreme values X, Y, Z provided on the integrating sphere 17' diffused in the integrating sphere 17 '. Further, it is led to an arithmetic processing unit through an amplifier and an A / D converter (not shown) to obtain a colorimetric value.

[Problems to be Solved by the Invention] The discoloration due to photochromism has a property of returning to the original in a short time when the light causing the discoloration is removed. It needs to be done quickly before it is complete.

By the way, in the color measurement of the sample according to the conventional technique as described above, since each point on the sample is sequentially measured one by one,
It takes time to measure the color and the discoloration returns to the original during the measurement.
It was not always possible to accurately measure the color distribution at each point of the sample.

Also, as mentioned above, the size of the sample compatible with the commonly used light resistance tester and colorimeter is about 70 × 150 mm and 100 ×
Due to its small size of about 100 mm, large samples, such as window glass for automobiles and architectural window film, etc., can be used as they are as a member that is normally used and discolored by photochromism, and its color distribution can be quickly measured. Was impossible.

Therefore, in order to manage the state of chemical treatment for causing photochromism and the treatment process during the production process of these materials and members, the color distribution is measured by causing discoloration due to photochromism with a sample as large as possible. Therefore, there is a demand for development of an apparatus capable of measuring color strength and color unevenness in a short time and determining whether the chemical treatment is good or bad.

[Means for Solving the Problems] An illumination room equipped with an illumination device for causing photochromism (photo-reversible discoloration) in a sample, and a colorimetric measurement having a plurality of light-transmitting parts and light-receiving parts for simultaneously measuring a plurality of positions of the sample A dark room equipped with an apparatus was connected to the apparatus, and a moving apparatus for moving the sample from the illumination room to the dark room at a high speed was provided. The apparatus was capable of measuring the color distribution of the photochromic sample.

[Operation] Therefore, in the present invention using the means as described above, the sample is discolored by photochromism in the illumination room and immediately moved to the dark room by the moving device. Here, since a colorimetric device having a plurality of light emitting parts and light receiving parts is provided in the dark room, it is possible to measure the color of each point of the sample at the same time.

[Embodiment] An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing the entire color distribution / colorimetry device 1 of the present embodiment, and FIG.
FIG. 3 is a partial perspective view of a moving device 2 that constitutes the color distribution colorimetry device 1, and FIG. 3 is a positional relationship diagram of the sample 3 and the light projecting part 4 and the light receiving part 5 in the color distribution colorimetry device 1.

By the way, the color distribution colorimetric apparatus 1 of the present embodiment is such that the upper part is the illumination room 7 provided with the light source 6 for causing the sample 3 to cause photochromism, and the lower part is the colorimeter for measuring the color distribution of the sample 3. A moving device for dividing the two into a dark room 9 provided with 8 and penetrating through a rectangular opening 10 provided in the bottom of the illumination room 7 (that is, the ceiling of the dark room) so that the sample 3 alternately moves between the two rooms. 2 is provided.

The moving device 2 is composed of a sample table 11 on which the sample 3 is mounted, shafts 12 and 12 'for supporting and vertically moving the sample, and a rotating device 13 for the shaft. The shafts 12 and 12 'are two round rods that penetrate through the opening 10 and are vertically arranged between the ceiling of the lighting room 7 and the bottom of the dark room 9. One shaft 12' is provided with a spiral groove. Below the shaft 12 ', a rotating device 13 including a bevel gear 14, a motor 15 and the like is connected to enable the shaft 12' to rotate. Sample table 11
Is a frame 16, which has an opening in the center of the flat plate, and a guide 16, 16 'having a small hole passing through the shaft 12, 12' in a square on one side.
Is fixed. Among these guides 16 and 16 ', the two guides 16' for passing the shaft 12 'having the spiral groove are
A spiral groove is formed so that the shaft 12 'can be screwed, and the sample table 11 is connected to the shaft 12,
It is supported by 12 'and moves up and down by the rotation of the shaft 12'. The sample 3 is attached to the sample table 11 by, for example, a sample retainer (not shown) having the same shape as the sample table 11.

As the light source 6 arranged in the illumination room 7, a plurality of black lights, which mainly emit light in the near-ultraviolet region of 300 to 400 nm, are horizontally and parallel to each other at regular intervals, and the sample table 11 is placed at a predetermined position in the illumination room 7. At one time, it was placed in parallel with this. In this embodiment, the number of black lights, the intervals between them, and the positional relationship with the sample table 11 are adjusted so that the area of about 1 m × 1 m on the sample table 11 can be uniformly irradiated.

The colorimeter 8 provided in the dark room 9 measures the transmitted color of the sample 3, and its optical system is composed of an integrating sphere 17, a plurality of light projecting portions 4 and a plurality of light receiving portions 5.

A xenon flash lamp 18 for producing diffused light is arranged on the inner wall of the integrating sphere 17, and a diffused light emitting opening 19 is provided on the inner wall facing the lamp 18. Further, around the integrating sphere 17, there is provided a light receiver 20 for measuring the three extreme values X, Y, Z in order to correct the variation of the light quantity of the xenon flash lamp 18. Further, a blocking plate 21 is provided on the front surface of the xenon flash lamp 18 so that this light is not directly emitted to the emission opening 19. Similarly, although not shown, a blocking plate is also provided on the front surface of each light receiver 20.

The light projecting section 4 is made of glass fiber and is provided in the same number as the number of locations where the color distribution of the sample 3 is measured. One end of the light projecting portion 4 is an introduction port 22 for introducing the diffused light in the integrating sphere 17, and the other end is an irradiation port 23 for irradiating the sample 3 with the introduced light.
The introduction ports 22 are inserted into and fixed to fixing plates 24 that are in close contact with the exit openings 19 of the integrating sphere 17. Irradiation port 23 is sample 3
Is fixed at a fixed distance close to the sample 3 via a positioning jig 25 so as to irradiate each position where the color distribution is measured.

The light receiving section 5 is made of glass fiber like the light projecting section 4,
The same number as the light projecting units 4 is provided. One end of the light receiving section 5 is an introduction port 22 'for introducing the transmitted light of the sample 3, and the central axes of the irradiation port 23 and the sample 3 of the light projecting section 4 are aligned with each other and close to the sample 3. Are arranged. Also, this inlet 2
The reference numeral 2'is fixed to a positioning jig 25 'for positioning the irradiation port 23 and a positioning jig 25' with the sample 3 sandwiched between them. In addition, the other end of the inlet 22 'is divided into three parts, and the divided end parts are respectively divided into three spectral intensity values (λ), (λ), and (λ) defined in JIS Z 8722. It is connected to a light receiver 27 having a filter 26 having characteristics. Further, each photodetector 27 is connected to a microcomputer 30 having a function of transmitting various operation processes and operation signals to each circuit of the apparatus through an amplifier 28 and an A / D conversion circuit 29.

Incidentally, 31 is an input / output port for exchanging signals between the microcomputer 30 and each circuit, 32 is a keyboard for instructing various operations, 33 is a graph of various color systems from signals from the microcomputer 30, A personal computer for data processing, 34 is a microcomputer
An output interface for sending a signal of 30 to the personal computer 33, a lighting circuit of the xenon flash sensor 19, and a display position of a colorimetric value or the like.

Further, the filter 26, the light receiver 27, the amplifier 28, the A / D conversion circuit 29, the microcomputer 30, the input / output port 31, the keyboard 32, and the output interface 34 are shown outside the device in FIG. 9 is arranged inside.

In the color distribution colorimetric apparatus 1 of the present embodiment configured as described above, the sample 3 is mounted on the sample table 11, the shaft 12 'is rotated by the motor 15 and the bevel gear 14, and the illumination chamber is provided along the shafts 12 and 12'. Move to 7. Here, all the light sources (black lights) are turned on for a certain period of time to uniformly irradiate the sample with light, thereby causing discoloration due to photochromism.

In the meantime, in the dark room 9, the xenon flash lamp 18 is made to emit light without setting the sample 3 to complete the standard adjustment of the colorimeter 8.

Next, the shaft 12 'is rotated in the opposite direction to move the discolored sample 3 from the illumination room 7 to a predetermined position in the dark room 9. Here, the xenon flash lamp 18 emits light and enters the introduction port 22 of each light projecting unit 4 as uniform diffused light in the integrating sphere 17, and irradiates each colorimetric position of the sample 3 from the irradiation port 23.
The light transmitted through the sample 3 is made incident from the inlet 22 'of the light receiving part 5 and guided to the other end divided into three parts, and the spectrum has characteristics of three extreme values (λ), (λ), and (λ). filter
The light is guided to a light receiver 27 equipped with 26, amplified by an amplifier 28, and
Digitized by D conversion circuit 29 Microcomputer 3
It is sent to 0 to obtain the colorimetric value.

Now, in the microcomputer 30, the intense values X, Y, Z are calculated by the following formulas.

Where X _S , Y _S , and Z _S are the data for standard adjustment, X _M , Y _M , and Z _M
Is the data when measuring the color of the sample, and the constants Kx, Ky, and Kz are the three extreme values when the transmittance is 100%.

The values of X, Y, Z are converted into, for example, L ^* a ^* b ^* , Lab, etc. and displayed on the display unit 36. It is also used to determine whether or not the colorimetric value sent to the microcomputer 33 is within a certain control numerical value range or to be graphed.

[Effect] According to the present invention, the material chemically treated to cause photochromism is uniformly irradiated with light to cause discoloration due to photochromism, and each portion of the sample is measured at the same time before the discoloration is restored. By coloring, the quality of this chemical treatment can be accurately and numerically determined in a short time.
For this reason, the quality can be easily made uniform and the defective rate of the product can be reduced. In addition, since large samples can also be determined, they can be introduced into the production line, and labor saving in product inspection can be achieved.

[Brief description of drawings]

FIG. 1 is a block diagram showing the entire color distribution colorimetric apparatus of the present invention,
FIG. 2 is a partial perspective view showing a moving device in the apparatus part of FIG. 1, FIG. 3 is a positional relationship diagram of a sample and a light emitting part and a light receiving part in the device of FIG. 1, and FIG. 4 is a conventional sample. Fig. 5 is a block diagram of a light resistance tester used to cause photochromism in Fig. 5, and Fig. 5 is a block diagram of a colorimeter conventionally used to measure discoloration due to photochromism. 1 ... Color distribution color measuring device, 2 ... moving device, 3,3 '... sample, 4,4' ... projecting unit, 5,5 '... light receiving unit, 6 ... light source, 7 ... Illumination room, 8,8 '... Colorimeter, 9 ... Dark room, 10 ... Aperture, 11 ... Sample stand, 12,12' ... Shaft, 13 ... Rotating device, 14 ... Bevel gear, 15 ... … Motor, 16,16 ′ …… Guide, 17,17 ′ …… Integrating sphere, 18 …… Xenon flash lamp, 19 …… Exit aperture, 20,20 ′ …… Receiver, 21 …… Shield plate, 22, 22 '…… Inlet port, 23 …… Irradiation port, 24 …… Fixing plate, 25,25 ′ …… Positioning jig, 26 …… Filter, 27 …… Receiver, 28 …… Amplifier, 29 …… A / D conversion circuit, 30 …… microcomputer, 31 …… input / output port, 32 …… keyboard, 33 …… personal computer, 34 …… output interface, 35 …… lighting circuit, 36 …… display, 37 …… lightproof Testing machine, 38 ... Test tank, 39 ... Xenon arc lamps, 40 ...... rotary frame, 41 ...... sample holder, 42 ...... dark box, 43 ...... entrance aperture.

Claims (1)

[Claims] 1. An illumination room provided with an illuminating device for causing photochromism (photoreversible discoloration) on a sample, and a color measuring device having a plurality of light projecting parts and light receiving parts for simultaneously measuring a plurality of positions of the sample. A color distribution colorimetric apparatus characterized in that it is connected to a dark room and is provided with a moving device that moves a sample from an illumination room to a dark room at high speed, and is capable of measuring the color distribution of a sample that causes photochromism.