JP2003014546A - Scanning colorimeter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simplify an apparatus as the whole and reduce its cost by miniaturizing a head section in a scanning colorimeter. SOLUTION: The colorimeter comprises a measurement head 3 that is provided at the measurement position of each color patch 61 that is relatively scanned to a color chart 6 where a plurality of color patches 61 are arranged for taking out illumination light concerned (reference light) and reflection light (measurement light) from the color patch 61 by illuminating the color patch 61 to be measured, a colorimetry processing section 4 for performing the operation processing of spectral characteristics from reference light and measurement light, and a flat cable 5 for guiding reference light and measurement light that are detected by the colorimetry head 3 to the colorimetry processing section 4. By separating a section for measuring and calculating spectral characteristics using colorimetry light and reference light from a section for taking out colorimetry light and reference light for measurement by illuminating a measurement target, the colorimetry head 3 can be miniaturized, the weight is reduced, and the load on its scanning member is reduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a color chart output by a color printer or a printing machine (a plurality of color patches arranged in a matrix and output).
The present invention relates to a scanning colorimetric apparatus that sequentially scans each color patch and automatically measures the color.

[0002]

2. Description of the Related Art In a color printer or printing machine, in order to keep the reproducibility of output colors constant, a color chart is created by the color printer or printing machine using predetermined color chart data. An output color of a color printer or a printing machine is evaluated by measuring the color of each color patch with a colorimeter and comparing the measured color value with a reference value. In the color chart, more than 800 color patches are arranged in a matrix, and all the color patches are measured quickly.
Conventionally, a scanning colorimeter that two-dimensionally scans each color patch in a color chart to perform color measurement has been proposed and commercialized.

For example, in Japanese Unexamined Patent Publication No. 6-117996, a sheet-like object to be measured is configured to be movable in the vertical direction, and a densitometer is configured to be movable in the horizontal direction. A scanning densitometer that automatically measures two or more points on the measured object by two-dimensionally scanning the densitometer with the lateral movement of the densitometer is shown. Has been done.

[0004]

The above-mentioned conventional scanning densitometer performs a measurement process using an illumination member that illuminates the object to be measured and a light receiving member that receives the reflected light from the object to be measured and the light receiving signal. Since the entire densitometer including the members is moved in the lateral direction, the portion to be scanned (head portion) becomes large and heavy, and the driving member of the scanning head also becomes large accordingly, which is also disadvantageous in terms of cost. Had a problem. Further, the head portion includes the illumination member, and the heat generated by the illumination member adversely affects the light receiving means,
Considering the stability of measurement, there is a certain limit to downsizing the head part.

The present invention has been made in view of the above problems, and in a scanning colorimeter, a portion to be scanned (head portion) is scanned.
Enables downsizing of the device, which in turn simplifies the entire device,
The present invention provides a scanning colorimeter that can be reduced in price.

[0006]

The invention according to claim 1 is
A scanning colorimeter that automatically measures the spectral characteristics of each color patch of a color chart in which a plurality of color patches are arranged in a grid pattern, and is movable relative to the color chart to generate illumination light. A light source, a first optical system that irradiates the color patch with the illumination light and guides reflected light from the color patch to a first light output end, and a part of the illumination light that outputs a second light. In order to measure the spectral characteristics of each color patch, the color measurement head having a second optical system leading to the end, and the color measurement head is moved relative to the color chart to move the color measurement head to the color A scanning unit of the colorimetric head, which is sequentially arranged to face the patch, a first spectral member that disperses the reflected light from the color patch in wavelength region units, and a first spectral member that disperses the illumination light in predetermined wavelength region units. Measurement means including a spectral member, a characteristic calculation unit that calculates spectral characteristics for each spectral component using the spectrally separated illumination light and reflected light, and the first and second color measurement heads. And a light guide unit including a pair of optical fibers for guiding the light emitted from the light output end to the first and second spectral members of the measurement processing unit.

According to the present invention, the colorimetric heads are moved relative to the color chart, the colorimetric heads are sequentially arranged to face the color patches, and the spectral characteristics of each color patch are automatically measured. It When the color measurement head is placed facing the color patch, the light source inside the color measurement head is turned on,
Illumination light generated by the light source is applied to the color patch. Reflected light from the color patch (hereinafter referred to as colorimetric light) is guided to the first spectral member of the measurement processing means via the first optical system and one optical fiber of the light guide means. Further, a part of the illumination light generated by the light source (hereinafter referred to as reference light) is guided to the second spectral member of the measurement processing means via the second optical system and the other optical fiber of the light guide means. The measurement light is dispersed in a predetermined wavelength region unit by the first spectral member, the reference light is dispersed in a predetermined wavelength region unit by the second spectral member, and the measurement processing is performed using the spectrally separated measurement light and the reference light. The spectral characteristic is calculated for each spectral component by the means.

By illuminating a color patch which is an object to be measured and separating a portion for taking out the measurement light and the reference light from a portion for separating the measurement light and the reference light and calculating a spectral characteristic for each spectral component, both are flexible. Since they are connected by the light guide means composed of optical fibers, the structure of the color measurement head to be scanned is simple and lightweight, and it is possible to realize a compact and low-cost scanning color measurement device as a whole. Further, since the portion for measuring and calculating the spectral characteristics is separated from the light source of the illumination light, stable measurement can be performed without being affected by heat generated by the light source.

According to a second aspect of the present invention, there is provided a scanning colorimetric apparatus for automatically measuring the spectral characteristics of each color patch of a color chart in which a plurality of color patches are arranged in a grid pattern. A light source that is relatively movable with respect to each other and that generates illumination light; a first optical system that irradiates the color patch with the illumination light and guides reflected light from the color patch to a light output end; and the illumination. The second optical system that guides a part of the light to the light output end and one of the lights that are guided from the first and second optical systems to the light output end are interrupted, and the reflected light and the illumination light are emitted. Of the mixed light and the reflected light, or the mixed light and the illumination light, the output light control member for alternately entering the light output end, and the spectral characteristics of each color patch. The above color measurement head to measure Is relatively moved with respect to the color chart sequentially the colorimetry head to the color patch,
Scanning means of the colorimetric head arranged opposite to each other, a spectral member for splitting the mixed light and the reflected light, or the mixed light and the illumination light in units of a predetermined wavelength region, and the spectroscopic means alternately. While separating the mixed light and the reflected light output to, separate the illumination light from the mixed light, or separate the mixed light and the illumination light alternately output from the spectroscopic means A measurement processing unit that includes a characteristic calculation unit that separates the reflected light from the mixed light and calculates spectral characteristics for each spectral component using the spectrally divided illumination light and reflected light; And a light guide unit composed of an optical fiber for guiding the light emitted from the light output end to the spectral member of the measurement processing unit.

The output light control member includes a semi-transmissive mirror arranged at the confluence of the reflected light guided by the first optical system and the illumination light guided by the second optical system, The chopper plate may be arranged between the semi-transmissive mirror and the first optical system or the second optical system, and a driving member for rotating the chopper plate at a predetermined speed (claim 3). .

According to the present invention, the colorimetric head is moved relative to the color chart, the colorimetric head is sequentially arranged opposite to the color patch, and the spectral characteristics of each color patch are automatically measured. It When the color measurement head is placed facing the color patch, the light source inside the color measurement head is turned on,
Illumination light generated by the light source is applied to the color patch. The reflected light (colorimetric light) from the color patch is guided to the input end of the optical fiber (light output end of the colorimetric head) by the first optical system, and part of the illumination light (reference light) generated by the light source is The second optical system guides the light to the input end of the optical fiber (light output end of the color measurement head). Either the colorimetric light guided by the first optical system or the reference light guided by the second optical system is interrupted at a predetermined cycle by the output light control member, and the optical fiber is mixed with the colorimetric light and the reference light. And the colorimetric light, or the mixed light and the reference light are alternately input in a predetermined cycle.

The mixed light and the colorimetric light, or the mixed light and the reference light are guided to the spectroscopic member of the measurement processing means through an optical fiber, and are spectrally separated in predetermined wavelength region units.
Then, when the mixed light and the colorimetric light are guided to the measurement processing means, the reference light is separated from the mixed light for each spectral component in the characteristic calculation unit, and the spectral characteristics are calculated using the reference light and the measurement light. It Further, when the mixed light and the reference light are guided to the measurement processing means, the measurement light is separated from the mixed light for each spectral component in the characteristic calculation unit, and the spectral characteristics are calculated using the measured light and the reference light. It

For example, in the invention described in claim 3, a chopper plate is provided between the semi-transmissive mirror and the first optical system, and when the chopper plate is rotated at a predetermined speed, the second optical system is operated. The guided reference light is continuously incident on the input end of the optical fiber, and the measurement light guided by the first optical system is interrupted at a predetermined cycle by the chopper plate and is incident on the input end of the optical fiber. Therefore, the mixed light of the measurement light and the reference light and the measurement light are alternately input to the optical fiber in a predetermined cycle.

The mixed light of the measurement light and the reference light and the measurement light are guided to the spectral member of the measurement processing means through an optical fiber,
The light-splitting member splits the light into predetermined wavelength regions. Then, the reference light is separated from the mixed light for each spectral component by the measurement processing means, and the spectral characteristics are calculated using the reference light and the measurement light.

On the other hand, in the invention according to claim 3, a chopper plate is provided between the semi-transmissive mirror and the second optical system, and when the chopper plate is rotated at a predetermined speed, the first optical system. The measurement light guided by (1) is continuously incident on the input end of the optical fiber, and the reference light guided by the second optical system is interrupted at a predetermined period by the chopper plate and is incident on the input end of the optical fiber. Therefore, the mixed light of the measurement light and the reference light and the reference light are alternately input to the optical fiber in a predetermined cycle.

The mixed light and the reference light are guided to the spectroscopic member of the measurement processing means through the optical fiber, and are separated into predetermined wavelength regions by the spectroscopic member. Then, the measurement light is separated from the mixed light for each spectral component by the measurement processing means,
The spectral characteristics are calculated using the measurement light and the reference light.

Also in the second and third aspects of the invention, the color patch to be measured is illuminated, the part for extracting the measurement light and the reference light, the measurement light and the reference light are dispersed, and the spectral characteristics are calculated for each spectral component. Since the part to be scanned is separated and both are connected by a light guide means consisting of a flexible optical fiber, the structure of the color measurement head to be scanned becomes simple and lightweight, and the entire device is compact and low cost scanning color measurement. The device becomes feasible. Further, since the portion for measuring and calculating the spectral characteristics is separated from the light source of the illumination light, stable measurement can be performed without being affected by heat generated by the light source.

Further, since the measurement light and the reference light are transmitted to the measurement processing means by the same light guide means, even if the transmission characteristics of the light guide means are changed by the scanning of the measuring head, the influence on the measurement result is reduced. be able to.

According to a fourth aspect of the present invention, there is provided a scanning colorimetric apparatus for automatically measuring the spectral characteristics of each color patch of a color chart in which a plurality of color patches are arranged in a grid pattern. A light source that is relatively movable with respect to each other and that generates illumination light; a first optical system that irradiates the color patch with the illumination light and guides reflected light from the color patch to a light output end; and the illumination. A second optical system that guides a part of the light to the light output end, a light that is guided from the first optical system to the output end, and a light that is guided from the second optical system to the output end are predetermined. In order to measure the spectral characteristics of each color patch, the colorimetric head including an output light control member that is made incident on the light output end alternately in a cycle of the colorimetric head is moved relative to the color chart. The color measurement Scanning means of the colorimetric head, which are sequentially arranged to face the color patch, a spectroscopic member for spectrally separating the reflected light from the color patch and a part of the illumination light in wavelength region units, and the spectroscopic means alternately. And a characteristic calculation unit that separates the reflected light from the color patch and a part of the illumination light output to, and calculates the spectral characteristic for each spectral component using the spectrally separated illumination light and the reflected light. And a light guide unit including an optical fiber for guiding the light emitted from the light output end of the colorimetric head to the spectral member of the measurement processing unit.

The light output control member is a chopper plate composed of a reflecting mirror arranged at the confluence of the reflected light guided by the first optical system and the illumination light guided by the second optical system. And a drive member for rotating the chopper plate at a predetermined speed (claim 5).

According to the present invention, the colorimetric heads are moved relative to the color chart, the colorimetric heads are sequentially arranged to face the color patches, and the spectral characteristics of each color patch are automatically measured. It When the color measurement head is placed facing the color patch, the light source inside the color measurement head is turned on,
Illumination light generated by the light source is applied to the color patch. The reflected light (colorimetric light) from the color patch is guided to the input end of the optical fiber (light output end of the colorimetric head) by the first optical system, and part of the illumination light (reference light) generated by the light source is The second optical system guides the light to the input end of the optical fiber (light output end of the color measurement head). The colorimetric light guided by the first optical system and the reference light guided by the second optical system are alternately input to the optical fiber at a predetermined cycle by the output light control member.

The colorimetric light and the reference light are alternately guided through the optical fiber in a time division manner to the spectral member of the measurement processing means, and are spectrally separated in predetermined wavelength region units. Then, the characteristic calculation unit calculates the spectral characteristic for each spectral component using the spectrally divided measurement light and reference light.

For example, in the invention described in claim 5, when the chopper plate is rotated at a predetermined speed, either one of the measurement light guided by the first optical system and the reference light guided by the second optical system. Light is intermittently transmitted through the chopper plate and is incident on the input end of the optical fiber, and the other light is reflected by the chopper plate and is incident on the input end of the optical fiber when one light is blocked. . Therefore, the measurement light and the reference light are alternately input to the optical fiber in a predetermined cycle. The measurement light and the reference light are guided to the spectroscopic member of the measurement processing means through the optical fiber, and are separated by the spectroscopic member into predetermined wavelength regions. Then, the measurement processing means calculates the spectral characteristics for each spectral component using the measurement light and the reference light.

Also in the fourth and fifth aspects of the invention, the color patch to be measured is illuminated, the portion for extracting the measurement light and the reference light, the measurement light and the reference light are dispersed, and the spectral characteristics are calculated for each spectral component. Since the part to be scanned is separated and both are connected by a light guide means consisting of a flexible optical fiber, the structure of the color measurement head to be scanned becomes simple and lightweight, and the entire device is compact and low cost scanning color measurement. The device becomes feasible. Further, since the portion for measuring and calculating the spectral characteristics is separated from the light source of the illumination light, stable measurement can be performed without being affected by heat generated by the light source.

Further, since the measurement light and the reference light are transmitted to the measurement processing means by the same light guide means, even if the transmission characteristics of the light guide means are changed by the scanning of the measuring head, the influence on the measurement result is reduced. be able to.

Further, since the data of the measuring light and the data of the reference light are directly obtained, the calculation of the spectral characteristic is simplified, and the deterioration of the measurement accuracy can be suppressed by this amount.

[0027]

1 is an external view of a scanning colorimetric apparatus according to the present invention. 2 is a block diagram showing the basic configuration of the scanning colorimeter according to the present invention.

The scanning colorimetric device 1 (hereinafter referred to as the colorimetric device 1) illuminates the sample table 2 on which the measurement sample 6 is mounted and the measurement sample 6 mounted on the sample table 2. With
A color measurement head 3 for taking out the light reflected by the measurement sample 6,
The light extracted from the colorimetric head 3 is spectrally separated, each spectral component is photoelectrically converted into an electrical signal, and then the colorimetric processing unit 4 that performs colorimetric measurement of the measurement sample 6 by predetermined signal processing; It is composed of a flexible flat cable 5 that electrically and optically connects the colorimetric processing unit 4.

The measurement sample 6 is a sheet-shaped color chart (several hundreds of color patches 61 are arranged in a grid) formed by a color printer or a printing machine. The colorimetric head 3 is arranged at a substantially horizontal center (in the vertical direction (Y direction in FIG. 1)) of a predetermined mounting area on which the measurement sample 6 (hereinafter referred to as the color chart 6) of the sample table 2 is mounted. (X direction in Figure 1)
It is movably attached to. A pair of support members 7 and 8 are provided on both ends of the sample table 2 in the horizontal direction (outside the mounting area), and a guide member 9 and a ball screw shaft 10 are provided on the support members 7 and 8 in parallel with the X direction. Has been erected. A guide rail 91 is formed on the surface of the guide member 9 that faces the ball screw shaft 10.

The ball screw shaft 10 is rotatably supported around the shaft center, and one end thereof is fixed to a rotor 111 (see FIG. 2) of an electric motor 11 such as a pulse motor which is a rotary drive source. A mounting portion 31 (see FIG. 2) having a nut (not shown) to which the ball screw shaft 10 can be screwed and a protrusion 311 (see FIG. 2) that can be fitted to the guide rail is formed on one side surface of the color measurement head 3. 2) is provided, and the colorimetric head 3 is
The ball screw shaft 10 is screwed into the nut of the mounting portion 1,
Moreover, the protruding piece 311 is fitted and attached to the guide rail 91. When the electric motor 11 is driven, the ball screw shaft 10 rotates, whereby the colorimetric head 3 is guided by the guide member 9 and moves linearly in the X direction. The ball screw shaft 1 is controlled by controlling the driving direction of the electric motor 11.
The rotation direction of 0 is controlled, and thereby the straight traveling direction of the color measurement head 3 is controlled. For example, when the ball screw shaft 10 is rotated clockwise with respect to the shaft center, the colorimetric head 3 moves to the support member 8 side (leftward in FIG. 1), and the ball screw shaft 10 is rotated counterclockwise with respect to the shaft center. When rotated, the colorimetric head 3 moves to the support member 7 side (rightward in FIG. 1).

On the other hand, although not visible in FIG. 1, as shown in FIG. 2, the color chart 6 is provided in the Y direction in a proper position in the sample table 2 (for example, a position facing the guide member 9) and the lower surface of the guide member 9. A chart feeding mechanism is provided for feeding to the. The chart feeding mechanism includes a pair of rod-shaped rollers 1.
2, 13 and an electric motor 14 such as a pulse motor which is a drive source of the roller 13. The roller 12 is arranged on the lower surface of the guide member 9 along the X direction, and both ends of the shaft 121 are rotatably supported. The roller 13 is arranged inside the sample table 2 so as to face the roller 12 and the peripheral surface of the roller 13 is substantially in contact with the peripheral surface of the roller 12.
One end of the shaft 131 of the roller 13 is rotatably supported by the sample table 2, and the other end is fixed to the rotor 141 of the electric motor 14. The peripheral surfaces of the rotors 12 and 13 are mounted with a friction member such as rubber or subjected to a predetermined surface treatment so that the frictional force between the rotors 12 and 13 and the color chart 6 sandwiched between the rollers is increased. It is processed.

At the time of measurement, the color chart 6 passes through between the guide member 9 and the sample table 2 as shown in FIG.
That is, the color chart 6 includes rollers 12 and 13
It is placed in a predetermined placement area of the sample table 2 so as to be sandwiched between and. When the electric motor 14 is driven in this state, the roller 13 rotates, and the color chart 6 sandwiched between the roller 12 and the roller 13 is thereby rotated.
3 is fed in the rotation direction (Y direction in FIG. 1). By controlling the driving direction of the electric motor 14, the rotation direction of the roller 13 is controlled, and thus the feeding direction of the color chart 6 is controlled. That is, in FIG.
3 is rotated counterclockwise with respect to the X axis, the color chart 6 is fed to the front side in the Y direction, and the roller 13 is moved to the X direction.
When rotated clockwise about the axis, the color chart 6
Is fed to the rear side in the Y direction.

Therefore, the colorimetric apparatus 1 according to this embodiment is
By combining the movement of the color chart 6 in the Y direction and the movement of the color measurement head 3 in the X direction, the color measurement head 3 is moved in a predetermined direction relative to the color chart 6, and the color patches 61 are sequentially moved. The color patches 61 are arranged so as to face each other and the color measurement of the color patch 61 is automatically performed.

It should be noted that motor control circuits 15 and 16 for controlling the drive of the electric motors 11 and 13 are provided at appropriate positions in the sample table 2.
And a control unit 17 for controlling the motor control circuits 15 and 16 and the color measurement processing unit 3. The control unit 17 is connectable to an external computer (not shown) such as a personal computer, and controls the color measurement processing of the color measurement device 1 under the control of the external computer. The control unit 17 controls the motor control circuits 15 and 1 in the color measurement process.
A drive control signal for the electric motors 11 and 13 is output to 6 to drive the electric motors 11 and 13 in a predetermined direction by a predetermined amount to sequentially arrange the color measurement heads 3 so as to face the color patches 61. The control unit 17 also outputs a scanning control signal of the color measurement head 3 to the color measurement processing unit 4, and the color measurement processing unit 4 concerned.
The color measurement processing of each color patch 61 is executed, the color measurement result is received from the color measurement processing unit 4, and the color measurement data of each color patch 61 is transferred to the external computer.

FIG. 3 is a diagram showing the internal structure of the colorimetric head 3 and the colorimetric processing section 4. As described above, the color measurement head 3
And the color measurement processing section 4 are electrically connected by a flat cable 5,
Optically connected. The flat cable 5 is shown in FIG.
As shown in Fig. 2, two pairs of electric wires (51, 51 '), (52, 52') for supplying power to an illumination light source in the color measurement head 3 and an electric motor for rotationally driving the chopper plate, which will be described later.
And an optical fiber 53 for guiding a light beam for color measurement from the color measurement head 3 to the color measurement processing unit 4. The flat cable 5 is a wire 5 for the light source on both sides of the optical fiber 53.
1, 51 ′ and electric wires 52, 52 ′ for the motor are arranged in parallel so as to be arranged and covered with an insulating member 54. Although not shown, the flat cable 5 has sockets at both ends and is detachably attached to the measurement head 3 and the colorimetric processing unit 4, respectively.

The colorimetric head 3 is reflected from the light source section 18 for illuminating the color patch 61, the illumination optical system 19 for guiding the illumination light from the light source section 18 to the color patch 61, and the illuminated color patch 61. Ray of light 53
Of the reflected light from the light receiving optical system 20, the color patch 61, and the reflected light and the illumination light from the light source unit 18 while guiding the illumination light from the light source unit 18 to the input end 53a of the optical fiber 53. It is configured with a chopper section 21 for alternately injecting light and the optical fiber 53 in a time division manner.

The light source section 18 is a hemispherical light mixing container 181.
And an incandescent light bulb 182. The incandescent lamp 182 is arranged at a predetermined position deviated from the container side surface on the central axis of the light mixing container 181. The incandescent light bulb 182 is connected to the electric wires 51 and 51 'in the flat cable 5, and the colorimetric processing unit 4
From the electric power is supplied from the electric wires 51 and 51 '. When power is supplied to the incandescent bulb 182, white light is emitted with a predetermined luminous intensity. The light mixing container 181 includes a hemispherical mirror 181a whose inner surface is a mirror, a donut-shaped diffusion plate 181b provided on the opening surface of the hemispherical mirror 181a, and a hemispherical mirror 18.
It is composed of an annular reflecting mirror (hereinafter referred to as a conical band mirror) 181c provided at a proper position on the inner curved surface of 1a, and a plane mirror 181d provided at the center of the inner side of the hemispherical mirror 181a.

The hemispherical mirror 181a and the diffusion plate 181b are
It constitutes a container for uniformly mixing the white light emitted by the incandescent lamp 181. The opening at the center of the diffusion plate 181b constitutes the exit of the light mixing container 18. An aperture lens 181e that constitutes a part of the illumination optical system 19 and the light receiving optical system 20 is provided in this aperture. The conical band mirror 181c uses the aperture lens 181 as a part of the white light mixed in the light mixing chamber 181 as the illumination light of the color patch 61.
The plane mirror 181d causes a part of the white light mixed in the light mixing chamber 181 to be emitted from the aperture lens 181e as reference light necessary for color measurement processing described later.

In the light mixing container 181, an incandescent lamp 181 is provided.
The white light emitted at is a hemispherical mirror 181a and a diffusion plate 181b.
After repeating reflection a plurality of times with and, the light is emitted to the outside from the opening provided with the aperture lens 181e. Diffusion plate 181b
The light beam incident on is diffused by the diffusing plate 181b and reflected on the hemispherical mirror 181a side, and these reflections are repeated a plurality of times to mix white light. Then, the light flux reflected by the conical band mirror 181c is emitted to the outside through the aperture lens 181e and is guided to the toroidal mirror 191 of the illumination optical system 19 described later. The light flux reflected by the plane mirror 181d is emitted to the outside through the aperture lens 181e and guided to the reflecting mirror 203 of the light receiving optical system 20 described later.

The illumination optical system 19 is a toroidal mirror 19 formed by forming an aperture lens 181e and a reflecting mirror on the inner surface of the ring.
It is composed of 1 and 1. The illumination optical system 19 converts the light flux of white light emitted from the light mixing container 18 into a conical light flux that forms 45 ° with respect to the normal line of the color chart surface and irradiates the color patch 61. . Light mixing container 1
Among the luminous fluxes emitted from 8, the luminous flux reflected by the conical band mirror 181c of the light mixing container 18 is incident on the toroidal mirror 191 through the aperture lens 181e, and this luminous flux is reflected by the toroidal mirror 191 and charted on the color patch 61. The light is incident at a predetermined angle with respect to the normal line n of the surface (the same as the optical axis L of the light beam emitted from the light mixing container 181). This incident angle is adjusted to about 45 ° by configuring the aperture lens 181e to form an image on the conical band mirror 181c at the focal position of the toroidal mirror 191. Therefore,
The color patch 61 is illuminated by the light source unit 18 and the illumination optical system 19 with a conical white light forming an angle of 45 ° with respect to the normal line n of the color chart surface.

The light receiving optical system 20 includes an aperture lens 181e,
Objective lens 201, three plane reflecting mirrors 202, 203,
204, two relay lenses 205 and 206, and a semitransparent mirror 207.

The plane reflecting mirror 202 has a reflecting surface facing the color patch 61 and the incident end 53a of the optical fiber 53 at the intersection of the optical axis L of the light beam emitted from the light mixing container 181 and the optical axis L'of the optical fiber 53. Thus, it is arranged at an angle of 45 °. The objective lens 201 is arranged at a proper position below the plane reflecting mirror 202 on the optical axis L, and the relay lens 205 is arranged at a proper place between the plane reflecting mirror 202 and the optical fiber 53. The relay lens 205 forms an optical image of the color patch 61 formed at the focal position of the objective lens 201 on the incident end 53a of the optical fiber 53.
The optical fiber 53 depends on the image forming position of the relay lens 205.
The incident angle (that is, the amount of incident light) of the light beam that is input to the incident end 53a is defined. A semi-transmissive mirror 207 is placed at an appropriate position on the optical axis L ′ between the relay lens 205 and the optical fiber 53.
Is provided. The semi-transmissive mirror 207 is arranged with its reflection surface inclined at 45 ° so as to face the incident end 53a of the optical fiber 53. The semi-transmissive mirror 207 has a ratio of transmitted light amount and reflected light amount of, for example, 9: 1.

Of the light flux reflected by the color patch 61,
The light flux in the direction of the normal line n is the objective lens 201 and the plane reflecting mirror 2.
The image is once formed at the focal position of the objective lens 201 on the optical axis L ′ by 02, and the optical image is formed at the incident end 53a of the optical fiber 53 by the relay lens 205. Since 10% of the light flux guided by the relay lens 205 is lost by the semi-transmissive mirror 207, 90% of the reflected light amount from the color patch 61 enters the optical fiber 53,
It is guided to the measurement processing unit 4 via the optical fiber 53.

On the other hand, the plane reflecting mirror 203 is the plane reflecting mirror 2
A reflecting surface is arranged at an appropriate position above 02 with an inclination of 45 ° so as to be orthogonal to the reflecting surface of the plane reflecting mirror 202. On the optical axis of the plane reflecting mirror 203 above the semi-transmitting mirror 207, the plane reflecting mirror 204 has its reflecting surface on the semi-transmitting mirror 2.
The plane reflecting mirror 203 is arranged in parallel with the reflecting surface of 07.
A relay lens 206 is arranged at an appropriate position on the optical axis of the flat reflecting mirror 204 between the flat reflecting mirror 204 and the flat reflecting mirror 204.

The light beam reflected by the plane mirror 181d in the light mixing container 181 is emitted to the outside through the aperture lens 181e, and the plane reflection mirror 203, the relay lens 206, the plane reflection mirror 204 and the anti-transmission reflection mirror 207 form an optical fiber. It is guided to the incident end 53a of 53. Relay lens 206
90% of the luminous flux guided by the semi-transmissive mirror 207
Therefore, 10 of the illumination light from the light source unit 18
% Is incident on the optical fiber 53,
Is guided to the measurement processing unit 4 via.

The chopper section 21 illuminates light (reference light) from the light source section 18 guided from the light receiving optical system 20 to the incident end 53a of the optical fiber 53, the illuminating light and the color patch 6.
The reflected light (measurement light) from 1 and the mixed light are made to enter the optical fiber 53 alternately by time division. The chopper portion 21 includes a chopper plate 211 and an electric motor 212 that is a rotational drive source for the chopper plate 211. The chopper plate 211 divides the periphery of the disk into four equal parts as shown in FIG.
The circular substrate 211 is removed by removing the facing portions in a fan shape.
Two blades 211b are formed at opposing positions on the peripheral edge of a. The chopper plate 211 is fixed to the rotor 212a of the electric motor 212, and is disposed between the flat reflecting mirror 204 and the semi-transmissive mirror 207 so that only the blade 211b is positioned on the optical path of the flat reflecting mirror 204. The electric motor 212 includes electric wires 52, 5 in the flat cable 5.
2'is connected, and power is supplied from the colorimetric processing unit 4 via the electric wires 52, 52 '. When power is supplied to the electric motor 212, the electric motor 212 is rotated at a predetermined rotation speed (for example, 600 rpm).

When the colorimetric data of the color patch 61 is fetched, the electric motor 212 is supplied with power and the chopper plate 211 is rotated at, for example, 600 rpm. As described above, the illumination light (reference light) from the light source unit 18 and the reflected light (measurement light) from the color patch 61 are guided to the incident end 53a of the optical fiber 53, but the blade 211b of the chopper plate 211 is flat. When passing through the optical path of the reflecting mirror 204, the illumination light from the light source unit 18 is blocked,
When only the reflected light from the color patch 61 is incident on the optical fiber 53 and the blade 211b of the chopper plate 211 does not pass on the optical path of the plane reflecting mirror 204, the optical fiber 53 reflects the reflected light from the color patch 61 and the light source unit. The mixed light with the illumination light from 18 is incident.

Therefore, the blade 21 of the chopper plate 211
When 1b passes on the optical path of the plane reflecting mirror 204, the
N ”, and when the blade 211b does not pass through the optical path of the flat reflecting mirror 204, it is set to“ OFF ”, and the chopper plate 21
If the rotation speed of 1 is 600 rpm, 10 × per second
Since the ON / OFF is repeated 2 = 20 times, the reference light and the mixed light are alternately captured by the colorimetric processing unit 4 at a cycle of 20 Hz.

The colorimetric processing section 4 comprises a polychrome unit 41 and a signal processing circuit 42. In the polychrome unit 41, a diffraction grating 411 that disperses the light flux is disposed on the optical axis of the light flux emitted from the emission end 53b of the optical fiber 53, and a sensor array 412 is disposed at an appropriate position above the optical fiber 53. A lens 413 is provided at a position in front of the diffraction grating 411 to form an image of the dispersed light beam on a corresponding light receiving sensor of the sensor array 412. The diffraction grating 411 disperses the light flux in the range of 400 to 700 nm emitted from the emission end 53b of the optical fiber 53 at a pitch of 10 nm. The sensor array 412 is formed by arranging at least 31 light receiving sensors, which are composed of photoelectric conversion elements, in a line, and the light incident from each light receiving sensor is converted into an electric signal (current value) according to its intensity. Is output.

The signal processing circuit 42, as shown in FIG.
Each light receiving sensor S0, S1, ... S3 of the sensor array 412
I / V conversion circuit 421 for converting an electric signal (current value) output from 0 into a voltage value, the 31st I / V conversion circuit 4
21 is output from a chopper comparator 422 that detects an AC component of the voltage signal that is output from the I / V converter 21, a multiplexer 423 that switches the voltage signals that are output in parallel from the I / V conversion circuit 421 in a time-division manner, and that outputs serially. An amplifier 424 that amplifies the voltage signal to a predetermined level, an A / D conversion circuit 425 that converts the voltage signal output from the amplifier 424 into a digital signal (light reception data) of a predetermined bit (for example, 16 bits), and an A / D conversion circuit A control circuit 426 is provided which calculates the spectral characteristics of the color patch 61 using the received light data output from 425. Further, the signal processing circuit 42 controls the motor control circuit 427 that controls the drive of the electric motor 212 that is the drive source of the chopper plate 211 in the color measuring head 3 and the light emission of the incandescent lamp 182 in the color measuring head 3. Lamp control circuit 42
And 8 are provided.

The control circuit 426 also controls driving of the motor control circuit 427 and the lamp control circuit 428. The drive signal output from the motor control circuit 427 is input to the electric motor 212 in the color measurement head 3 by the electric wires 52 and 52 'of the flat cable 5, and the drive signal output from the lamp control circuit 428 is the electric wire of the flat cable 5. 51,5
It is input to the incandescent lamp 182 in the colorimetric head 3 by 1 '. A scanning drive signal is input to the control circuit 426 from the control unit 17 in the sample table 2, and the control circuit 426 sequentially moves the colorimetric head 3 to each color patch 61 in the color chart 6 based on the scanning drive signal. Then, the incandescent lamp 182 in the colorimetric head 3 is operated after confirming that they are arranged to face each other, and each circuit in the signal processing circuit 42 is operated to determine the spectral characteristics for each color patch 61 by the signal processing described later. The control unit 17 in the sample table 2 calculates the calculation result.
Transfer to.

The I / V conversion circuit 421 is provided for each light receiving sensor S.
0, S1, ... S30 has 31 I / V conversion circuits, and the light receiving signals (current signals) output from the respective light receiving sensors S0, S1 ,. Output from terminals CH0 to CH30. From the light receiving sensors S0, S1, ...
10 nm, 310 to 320 nm, ... 690 to 700 nm
Since the signal that receives the light of the wavelength component of
From the channel terminals CH0 to CH30 of the V conversion circuit 421, the voltage signals V0, V1, ... V30 of the respective wavelength components are output.

Channel terminal C of I / V conversion circuit 421
The voltage signal output from H30 is input to the chopper comparator 422 via the capacitor C, and the output signal from the chopper comparator 422 is input to the control circuit 426. The sensor array 412 has two reference lights and two mixed lights.
Since the light is incident alternately at a cycle of 0 Hz, the I / V conversion circuit 4
A voltage signal in which a direct current component (corresponding to the reflected light component from the color patch 61 included in the mixed light) is superimposed on a 20 Hz alternating current signal (corresponding to the reference light component included in the mixed light) is output from the channel terminal CH30 of 21. Is output. Therefore, from the chopper comparator 422, a voltage signal obtained by shaping only the AC component of the voltage signal into a pulse shape is output from the control circuit 426.
Entered in.

Since the chopper comparator 422 detects the intermittent period of the reference light by the chopper plate 221, and inputs it to the controller 426, the input signal to the chopper comparator 422 is limited to the output signal of the channel terminal CH30. Channel terminal CH0
The output signal of any one of CH30 to CH30 can be input.

Channel switching of the multiplexer 423 is controlled by the control circuit 426. Multiplexer 42
3 is a channel terminal CH of the I / V conversion circuit 421 based on a channel scanning signal input from the control circuit 426.
0 to CH30 input voltage signals V0, V1, ... V3
0 is sequentially output to the amplifier 424. The gain of the amplifier 424 is variable, and a predetermined gain is set by the control circuit 426 for each channel corresponding to the open period (mixed light receiving period) and the closed period (measurement light receiving period) of the chopper plate 211. It is like this. The control circuit 426 synchronizes with each channel CHi (i =
The gain corresponding to 0, 1, ... 30) is set in the amplifier 424. Therefore, the voltage signals V0, V1, ... V30 sequentially output from the multiplexer 423 are output to the amplifier 424.
Is amplified by the gain corresponding to each channel,
After that, it is converted into 16-bit digital data by the A / D converter 425 and input to the control circuit 426. In addition, A
The A / D converter 425 also synchronizes with the channel scanning signal to A /
The D conversion process is controlled.

FIG. 6 is a diagram showing the output waveform of each part in the signal processing circuit 42. Next, the process of calculating the spectral characteristic in the signal processing circuit 42 using this output waveform will be specifically described.

In FIG. 6, the "scan drive signal A" is a signal for controlling the color chart scan of the color measuring head 3 which is input from the control section 17 in the sample table 2 to the control circuit 426. The “lamp drive signal B” is a signal input from the control circuit 426 to the lamp control circuit 428 for controlling the drive of the incandescent lamp 4. Also, "Lamp luminous flux C"
Indicates the luminous intensity state of the incandescent light bulb 4.

The state in which the scanning drive signal A is "ON" indicates the period during which the color measuring head 3 is being moved to the measurement position of the color patch 61 to be measured, and the state in which it is "OFF" is the color measuring head 3 is measuring target. The color patch 61 of FIG. Further, the state where the lamp drive signal B is “ON” indicates a state where the incandescent bulb 4 is turned on, and the state where the lamp drive signal B is “OFF” indicates a state where the incandescent bulb 4 is turned off. Since the incandescent lamp 3 is turned on only during the measurement period, the lamp drive signal B is turned “ON” in synchronization with the scanning drive signal A “OFF”, and the incandescent bulb 4 is emitted at a predetermined light intensity during this period.

"Chopper comparator output D" is a signal output from the chopper comparator 422. As described above, the chopper comparator 422 equivalently outputs a signal that detects a change in the reference light by the chopper plate 211 in the measurement head 4 (periodic change of 20 Hz). Therefore, in FIG. A 20 Hz pulse signal is output during the period.

"Output E of channel terminal CHi" is I /
This is a signal output from the channel terminal CHi of the V conversion circuit 421. From each channel terminal CHi of the I / V conversion circuit 421, a light reception signal obtained by alternately receiving the mixed light and the reference light at the time of measurement is output. Therefore, a pulse synchronized with the chopper comparator output during the ON period of the lamp drive signal B is output. Signal is output. In FIG. 6, the output E from each channel terminal CHi is represented by an inverted signal. Further, since the light emission amount of the incandescent light bulb 4 transiently changes at the rising and falling of the lamp drive signal B,
The waveform of the output E from each channel terminal CHi is also unstable.

The "chopper open / closed state F" is one period of the open state (mixed light receiving period) and the closed state (measurement light receiving period) of the chopper plate 211 in the stable period of the output E of the channel terminal CHi. It is an enlarged display. The "amplifier output G" is an enlarged display of the output waveform from the amplifier 424 during the open period and the closed period of the chopper plate 211 corresponding to the enlarged display of the chopper open / closed state F.

As shown in the figure, the multiplexer 423 is respectively provided during the open period and the closed period of the chopper plate 211.
Channel scanning is performed, and in the open period of the chopper plate 211, a predetermined gain corresponding to the open period is set in the amplifier 424 for each channel, and the voltage signals V0, V1 sequentially output from each channel CHi. , ... V
30 is amplified by the amplifier 424, and then A / D converter 42
It is converted into 16-bit digital data at 5 and input to the control circuit 426. Similarly, in the closed period of the chopper plate 211, a predetermined gain corresponding to the closed period is set in the amplifier 424 for each channel, and each channel CH
The voltage signals V0, V1, ... V30 sequentially output from i
Is amplified by an amplifier 424, then converted into 16-bit digital data by an A / D converter 425, and the control circuit 42
6 is input.

The light receiving process of the mixed light and the reference light by the channel scanning increases the S / N in the measuring process.
The operation is performed for N cycles of the opening / closing operation of the chopper plate 211, and the integrated value of the light reception data of the mixed light and the reference light taken in each opening / closing period becomes the data for the measurement processing. That is,
Let Cij be the received light data (mixed light received data) of the j-th chopper open period of the channel CHi, and let Sij be the received light data (measured light received data) of the j-th closed period. Si is Ci = ΣCij (j = 1
Up to N), and Si = ΣSij (j = 1 to N).

In the control circuit 426, if the received light data Cij of the mixed light is the sum of the received light data of only the measurement light Sij and the received light data of only the reference light Rij, Ci = ΣCij = Σ
Since (Sij + Rij), Ci-Si is obtained for each spectral component.
= Σ (Sij + Rij) −ΣSij (j = 1 to N is added), the received light data Ri of the reference light only = ΣRij (j
= 1 to N) is calculated, and the spectral characteristic Pi (= Si / Ri) which is the ratio of the received light data Si of the measurement color to the received light data Ri of the reference light is calculated. Then, the calculation result is transmitted to the external computer via the control unit 17, and is converted into the spectral reflectance R (λ) of each color patch by a known technique such as white calibration.

As described above, in the scanning colorimeter 1 according to this embodiment, the portion for illuminating the color patch 61 to be measured and taking out the measurement light and the reference light is the measurement head 3, and the measurement light and the reference light are used. The portion that calculates the spectral characteristic of each light and calculates the spectral characteristic for each spectral component is the measurement processing unit 4, and the measurement head 3 and the measurement processing unit 4 are connected by the flat cable 5 including the optical fiber 53. The structure of the colorimetric head 3 for relatively scanning the image becomes simple and lightweight,
The load on the scanning member of the colorimetric head 3 is also reduced, and the size and cost of the entire apparatus can be reduced.

Further, since the incandescent lamp 182 which is a heat source is separated from the measurement processing section 4 by separating the colorimetric head 3 and the measurement processing section 4, the heat generated by the incandescent lamp 182 is transmitted to the measurement processing section 4. Stable measurement is possible without influence. Further, since the measurement light and the reference light output from the color measurement head 3 are guided to the measurement processing unit 4 by using the same optical fiber 53, the bending state of the flat cable 5 can be prevented by scanning the color measurement head 3. Even if the optical transmission characteristic of the optical fiber 53 changes due to the change, the influence thereof affects both the measurement light and the reference light, and therefore does not affect the calculation accuracy of the spectral characteristic.

The mixed light and the reference light are fed to the chopper plate 21.
1 is time-divided, and each is transmitted to the measurement processing unit 4 by the optical fiber 53.
The spectral member and the measurement processing circuit for the mixed light and the reference light therein can be shared, and the configuration of the measurement processing unit 4 can be simplified. Further, it is not necessary to adjust both characteristics when the spectral member and the measurement processing circuit are provided for each of the mixed light and the reference light, which also makes it possible to stabilize the measurement.

In the above embodiment, the chopper plate 21 is used.
1 is provided between the plane reflecting mirror 204 and the semi-transmissive mirror 207,
Although the reference light is interrupted by the chopper plate 211, the chopper plate 211 may be provided between the relay lens 205 and the semitransparent mirror 207 so that the measurement light is interrupted by the chopper plate 211.

Further, as shown in FIG. 7, in the colorimetric head 3 shown in FIG. 3, the chopper plate 2 whose surface facing the plane reflecting mirror 204 is a reflecting mirror instead of the semi-transmissive mirror 207.
11 'may be provided and the reference light and the measurement light may be alternately guided to the optical fiber 5 at a predetermined cycle by rotating the chopper plate 211' at a predetermined speed.

Since a semi-transparent mirror is not used in this configuration,
Both the measurement light reflected from the color patch 61 and the reference light from the light source unit 18 are transmitted to the color measurement processing unit 4 via the optical fiber 5 at about 100%. Therefore, as compared with the first embodiment, the resolution of the data obtained by converting the received light signals of the measurement light and the reference light into digital values by the A / D circuit 425 can be increased, and there is an advantage that the measurement accuracy is improved.

In the first embodiment, Ci-Si = Σ
Although it was necessary to calculate the light reception data Ri = ΣRij (j = 1 to N is added) of only the reference light by (Sij + Rij) −ΣSij, Ri = ΣRij (j =
1 to N) and Si = ΣSij (j = 1 to 1)
Since the value obtained by adding up to N) can be directly obtained, the spectral characteristic Pi can be immediately obtained by calculating Si / Rj. Further, since the calculation process is simplified as described above, there is an advantage that the deterioration of the measurement accuracy is suppressed.

In the above embodiment, the measuring light and the reference light are transmitted from the colorimetric head 3 to the colorimetric processing section 4 by sharing the same optical fiber 53. In addition to providing a spectroscopic optical system and a light receiving sensor for measuring light in the same, while providing a spectroscopic optical system and a light receiving sensor for reference light, an optical fiber for measuring light transmission and an optical fiber for reference light transmission are provided in the flat cable 5. The measurement light and the reference light from the colorimetric head 3 may be transmitted to the corresponding spectroscopic optical system and the light receiving sensor in the colorimetric processing unit 4 through separate optical fibers. With this configuration, since it is not necessary to provide the chopper portion 21 in the color measurement head, the color measurement head 3 can be further reduced in size and weight. In addition, since it is not necessary to wire the electric wires 52 and 52 'for driving the motor in the flat cable 5, the cable width of the flat cable 5 can be shortened.

[0073]

As described above, according to the present invention of claim 1, the color patch to be measured is illuminated,
Since the portion for extracting the measurement light and the reference light and the portion for measuring the measurement light and the reference light and for calculating the spectral characteristic for each spectral component are separated, and both are connected by the light guide means made of a flexible optical fiber, The structure of the color measurement head to be scanned becomes simple and lightweight, and it becomes possible to realize a compact and low-cost scanning color measurement device as a whole. Further, since the portion for measuring and calculating the spectral characteristics is separated from the light source of the illumination light, stable measurement can be performed without being affected by heat generated by the light source.

According to the invention described in claims 2 and 3,
In addition to the above effects, the measurement light and the reference light are transmitted to the measurement processing means by the same light guide means, so that even if the transmission characteristics of the light guide means change due to the scanning of the measuring head, the influence on the measurement results Can be reduced.

Further, according to the inventions of claims 4 and 5,
In addition to the above effects, the data of the measurement light and the reference light are directly obtained, so that the calculation of the spectral characteristics is simplified and the deterioration of the measurement accuracy can be suppressed by this amount.

[Brief description of drawings]

FIG. 1 is an external view of a scanning colorimeter according to the present invention.

FIG. 2 is a block diagram showing a basic configuration of a scanning colorimeter according to the present invention.

FIG. 3 is a diagram showing an internal configuration of a color measurement head and a color measurement processing unit.

FIG. 4 is a diagram showing a shape of a chopper plate.

FIG. 5 is a block diagram showing a configuration of a signal processing circuit.

FIG. 6 is a diagram showing an output waveform of each part of the signal processing circuit.

FIG. 7 is a view showing another embodiment of the measuring head.

[Explanation of symbols]

1 Colorimeter (scanning colorimeter) 2 sample table 3,3 'colorimetric head 4 Color measurement processing section 41 Polychrome unit (spectral member) 42 signal processing circuit (measurement processing means) 421 I / V conversion circuit 422 Chopper comparator 423 multiplexer 424 amplifier 425 A / D conversion circuit 426 Control circuit 427 Motor control circuit 428 Lamp control circuit 5 flat cable 51, 51 ', 52, 52' electric wire 53 Optical fiber (light guiding means) 54 Insulation member 6 Measurement sample (color chart) 61 color patches 7,8 Support member 9 Guide member (element of scanning means) 10 Ball screw shaft (element of scanning means) 11 Electric motor (element of scanning means) 12, 13 Roller (element of scanning means) 14 Electric motor (element of scanning means) 15, 16 Motor control circuit 17 Control unit 18 Light source (light source) 181 Light Mixing Container 182 Incandescent light bulb 19 Illumination optical system 191 toroidal mirror 20 Light receiving optical system (first and second optical systems) 201 Objective lens 202, 203, 204 Plane reflector 205, 206 Relay lens 207 Semi-transparent mirror 21 Chopper part (output light control member) 211,211 'Chopper board 212 Electric motor (driving member)

Claims (5)

[Claims] 1. A scanning colorimetric apparatus for automatically measuring the spectral characteristics of each color patch of a color chart in which a plurality of color patches are arranged in a grid pattern, wherein the scanning colorimeter is movable relative to the color chart. A light source that generates illumination light, a first optical system that irradiates the color patch with the illumination light and guides reflected light from the color patch to a first light output end, and a portion of the illumination light. In order to measure the spectral characteristics of each color patch and a color measurement head having a second optical system that leads to the second light output terminal, the color measurement head is moved relative to the color chart to perform the measurement. Scanning means of the colorimetric head in which the color heads are sequentially arranged opposite to the color patches, a first spectral member that disperses the reflected light from the color patches in wavelength region units, and the illumination light has a predetermined wavelength region. single Of the colorimetric head, and a measurement processing unit that includes a second spectral member that disperses light at a position, a characteristic calculation unit that calculates spectral characteristics for each spectral component using the spectrally divided illumination light and reflected light. And a light guide unit including a pair of optical fibers for guiding the light emitted from the first and second light output ends to the first and second spectral members of the measurement processing unit, respectively. Scanning colorimeter. 2. A scanning colorimetric apparatus for automatically measuring the spectral characteristics of each color patch of a color chart in which a plurality of color patches are arranged in a grid pattern, wherein the scanning colorimeter is movable relative to the color chart. A light source that generates illumination light, a first optical system that irradiates the color patch with the illumination light and guides reflected light from the color patch to a light output end, and outputs a part of the illumination light to the light output. One of the second optical system guided to the end and the light guided from the first and second optical systems to the output end is intermittently connected to generate the mixed light of the reflected light and the illumination light and the reflected light. ,
Alternatively, in order to measure the spectral characteristic of each color patch, a colorimetric head including an output light control member that alternately causes the mixed light and the illumination light to enter the light output end, and Scanning means of the colorimetric head, which moves the colorimetric head relative to the color chart so as to sequentially face the color patch, and the mixed light and the reflected light, or the mixed light and the illumination light. And a light-splitting member that splits light in predetermined wavelength region units, separates the mixed light and the reflected light that are alternately output from the light splitting means, separates the illumination light from the mixed light, or While separating the mixed light and the illumination light alternately output from the spectroscopic means, separating the reflected light from the mixed light, for each spectral component using the spectrally divided illumination light and reflected light A measurement processing unit including a characteristic calculation unit that calculates a light characteristic; and a light guide unit including an optical fiber that guides light emitted from the light output end of the colorimetric head to a spectral member of the measurement processing unit. A scanning colorimetric device characterized by being provided. 3. The scanning colorimeter according to claim 2, wherein the output light control member joins the reflected light guided by the first optical system and the illumination light guided by the second optical system. A semi-transmissive mirror disposed at a point, a chopper plate disposed between the semi-transmissive mirror and the first optical system or the second optical system, and the chopper plate is rotated at a predetermined speed. A scanning colorimetric device comprising a driving member. 4. A scanning colorimetric apparatus for automatically measuring the spectral characteristics of each color patch of a color chart in which a plurality of color patches are arranged in a grid pattern, the scanning colorimeter being capable of relative movement with respect to the color chart. A light source that generates illumination light, a first optical system that irradiates the color patch with the illumination light and guides reflected light from the color patch to a light output end, and outputs a part of the illumination light to the light output. The second optical system guided to the end, the light guided to the output end from the first optical system, and the light guided to the output end from the second optical system are alternately output at a predetermined cycle. In order to measure the spectral characteristics of each color patch and a color measurement head having an output light control member that is incident on the end, the color measurement head is moved relative to the color chart to move the color measurement head to the color Sequential to patch Scanning means of the colorimetric heads arranged to face each other, a spectroscopic member that disperses the reflected light from the color patch and a part of the illumination light in wavelength region units, and the color patch alternately output from the spectroscopic means. And a part of the illumination light from the reflected light from the measurement processing means including a characteristic calculation unit that calculates spectral characteristics for each spectral component using the spectrally divided illumination light and the reflected light, A light guide means formed of an optical fiber for guiding the light emitted from the light output end of the color measurement head to the spectral member of the measurement processing means. 5. The scanning colorimeter according to claim 4, wherein the light output control member joins the reflected light guided by the first optical system and the illumination light guided by the second optical system. A scanning colorimetric device comprising a chopper plate formed of a reflecting mirror arranged at a point, and a driving member for rotating the chopper plate at a predetermined speed.