JP2000088651A - Colorimetric system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a colorimetric value subjected to correction while taking account of the temperature of an object being measured. SOLUTION: A light source section 5 and a light receiving section 6 form a colorimetric optical system and measurements can be obtained by driving it. A temperature detecting section 7 has a thermopile 72 disposed oppositely to an object being measured and detects surface temperature thereof. Thermochromism of a sample, i.e., a temperature characteristic data, is stored in a memory 11. A corrected colorimetric value is obtained by correcting the measurements from the colorimetric optical system using the temperature characteristic data and the detected surface temperature.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a colorimeter for measuring the surface color and the like of an object to be measured.

[0002]

2. Description of the Related Art In recent years, metallic coating, mica coating, and the like have become widespread, particularly as seen in automobiles. Since these metallic materials appear in different colors depending on the viewing angle, it is necessary to observe from various angles to accurately determine the surface color. Therefore, conventionally, a device that irradiates light from one light source and receives light at a plurality of angles, or conversely, a gonio colorimeter or a multi-angle colorimeter that irradiates light from a plurality of angles and receives light at one light receiving unit is known. Have been. In this type of colorimeter, since there is diffuse reflection light on the surface of the object to be measured and specular reflection light from the metallic element on the surface layer, the irradiation angle and the light reception angle of the irradiation light on the surface of the object to be measured are different. These angles need to be set particularly accurately because they are important components of color measurement.

[0003]

Conventionally, it is known that the color of a color material changes when the temperature changes, as in the case where the colorimetric value cannot be measured accurately due to an angle shift.

[0004] The present invention has been made in view of the above,
It is an object of the present invention to provide a colorimetric device that obtains a colorimetric value in consideration of a color material temperature.

[0005]

According to the first aspect of the present invention,
In a colorimetric device that irradiates light to an object to be measured and receives light reflected from the surface of the object to obtain a light receiving signal, a temperature detecting means for detecting a temperature and temperature characteristic data of the object to be measured are stored. A memory for calculating a colorimetric value based on the light receiving signal, and a calculating means for correcting the colorimetric value based on the detected temperature and the temperature characteristic data. It is known that the color of a color material changes when the temperature changes, so if you have data on the temperature characteristics of the DUT including the color material in advance, it can be corrected according to the detected temperature of the DUT. The obtained colorimetric values are obtained.

According to a second aspect of the present invention, the temperature characteristic data is a change amount of a colorimetric value per unit temperature, and the calculating means is configured to calculate a difference between a detected temperature and a reference temperature and the change amount. It is characterized in that the colorimetric value is corrected.

[0007]

1 to 4 show a first embodiment of a configuration in which a colorimetric device according to the present invention is provided in a multi-angle spectral colorimetric device. FIG. 2 is a side sectional view, FIG. 3 is a sensor structure diagram of a posture detecting unit, and FIG. 4 is a diagram of a posture adjusting mechanism viewed from the rear.

In FIG. 1, reference numeral 1 denotes an optical base plate of the colorimeter, and reference numeral 2 denotes an outer cover fixed to the optical base plate 1 and including the optical base plate 1. Reference numeral 3 denotes a lower portion of the outer cover 2, which is a measurement leg fixed to the optical base plate 1. The measuring leg 3 and the outer cover 2 are tightly closed to ensure light shielding against external light. A substantially semicircular measurement space 1a is formed below the optical base plate 1 when viewed from the front.

A light source unit 5 for irradiating the object 4 with light, a light receiving unit 6 for receiving light reflected from the surface of the object to be measured, a temperature detecting unit 7, an attitude detecting unit 8, and an attitude are provided inside the outer cover 2. An adjusting mechanism 9 is provided.

The measuring leg 3 is provided at a position covering the measuring space 1a, and has a predetermined shape such as a circle or a square at the lower portion, and an opening 31 facing the object 4 is formed. . A peripheral ridge 32 bent at a predetermined dimension downward at a peripheral edge of the opening 31 or at a position in the vicinity thereof.
The surface of the DUT 4 comes into contact with the protrusion 32.

The light source unit 5 and the light receiving unit 6 forming the colorimetric optical system are both fixed to the optical base plate 1 so as to be on one plane (hereinafter referred to as an X plane).

The light source unit 5 includes three light sources 5 provided at radial positions so as to direct the center positions of the openings 31 respectively.
1, 52, and 53, and are set at angles of + 27.5 °, 0 °, and −20 ° with respect to a normal on the X plane. Reference numerals 51a, 52a, and 53a denote light sources such as halogen lamps and Xe lamps that emit light having a predetermined color temperature. The luminous flux of the irradiating light emitted from each of the light sources 51a, 52a, 53a is transmitted to a lens 51b, 52b,
The light beam is converted into a parallel light beam at 53b, and irradiates the central position of the opening 31, that is, the surface or the surface layer of the object 4 to be measured.

The light receiving section 6 is composed of an incident section 61 and a sensor section 62, and is connected by an optical fiber 63 therebetween. The incident portion 61 is directed toward the center of the opening portion 31 and is set at, for example, 45 ° with respect to a normal on the X plane. As a result, the incident portion 61 receives 27.5 °, 45 °, 6 ° as reflected light from the surface or the surface layer of the DUT 4.
A light beam from a direction of 5 ° is incident. In the incident section 61, a convex lens 61b and a hemispherical lens 61c behind the convex lens 61b are fixed in a lens barrel 61a for guiding light flux (for ensuring directivity), and a fiber tip 63a is located immediately behind the convex lens 61b. Are located in Thereby, the reflected light is converged by the convex lens 61b and the hemispherical lens 61c, and is efficiently guided to the fiber 63. The sensor section 62 has a light receiving lens barrel 62a, a fiber rear end 63b at a front end thereof, and a cylindrical lens 62b to 62
The light axes are arranged so that d coincides with each other, and a spectroscopic optical sensor 62e is arranged behind the light axis on the same optical axis. The light beam introduced from the fiber 63 is converted into a rectangular light beam by the cylindrical lenses 62b to 62d and guided to the light receiving surface of the optical sensor 62e. The light receiving beam is converted into the corresponding square shape because the optical sensor 62e, which is a spectral sensor, usually has a square shape in which a plurality of light receiving elements are arranged in the spectral direction. , Corresponding to this shape. In addition, by using the optical fiber 63, the sensor unit 62 can be disposed at a required space position of the exterior cover 2 or at a position deviated from the X plane, thereby making it possible to reduce the size and facilitate the layout.

The temperature detecting section 7 is attached to the optical base plate 1 with a screw 70, and its tip end is inserted into a hole 33 of a required diameter formed in an appropriate position on a surface of the measuring leg 3 facing downward. Thereby, it faces the surface of the DUT 4. The temperature detecting section 7 includes a cylindrical holder 71 fitted in the hole 33 of the measuring leg 3, a thermopile 72 fixed as a thermosensitive element in the holder 71, and a thermopile holder 73 fitted or screwed in the holder 71. And two lead wires 74 for detecting electrical signals. The sensor surface of the thermopile 72 is located at a position separated from the surface of the measured object 4 by substantially the dimension of the ridge 32. The thermopile 72 is a kind of thermocouple that generates and outputs a voltage difference between two lead wires according to the surface temperature of the device under test 4, thereby measuring the surface temperature of the device under test 4. I can do it.

As shown in FIG. 2, the posture detector 8 is fixed to the optical base plate 1 so as to be located on a plane (hereinafter, referred to as a Y plane) orthogonal to an X plane for colorimetry. Yes,
This prevents colorimetry from being hindered. The posture detection unit 8 includes a light source unit 81 and a light receiving unit 82,
Both are directed to the center position of the opening 31 and are set at symmetrical angles, for example, + 20 ° and −20 ° with respect to the normal on the Y plane. If the colorimetric optical system is not hindered, the attitude detection unit 8 does not need to be positioned on the Y plane, and may be on the same X plane or on a plane inclined from the X plane. Further, it is preferable that the angles of the light source unit 81 and the light receiving unit 82 with respect to the normal direction are the same, but there is no reason to limit to this, as long as the light receiving level at the light receiving unit 82 does not hinder the measurement. , May be slightly different, and the angle does not need to be particularly limited to 20 °,
It can be set appropriately in relation to the arrangement position.

The light source section 81 has a light projecting lens barrel 81a, in which a light projecting lens 81b is fixed by a lens holder 81c. Lens holder 8
An LED 81d, which is a light emitting source, is provided behind 1c, and the LED 81d is bonded and fixed in a state fitted in a cylindrical holder 81e. The holder 81e is fastened by a fixing screw (not shown) in a state of being fitted from the rear end side of the projection lens barrel 81a. Floodlight barrel 8
1a, a cylindrical portion is formed to extend at the tip side of the light projecting lens 81b, and this cylindrical portion is exposed to the measurement space 1a to guide the light projected from the LED 81d to the center position of the opening 31. ing. The rear end of the light source unit 81 is connected to a lead wire 81f for causing the LED 81d to emit light. Note that a tungsten lamp or laser light may be used instead of the LED as the light emitting source.

The light receiving section 82 has a light receiving barrel 82a, in which a light receiving lens 82b is fixed by a lens holder 82c. Lens holder 8
Behind 2c, an SPD (silicon photodiode) 82d as a photo sensor is integrally provided in a state of being bonded to the SPD base plate 82e. The SPD base plate 82e is fastened and fixed in a fitted state by a fixing screw 82i in a cylindrical holder 82f fitted in the light receiving lens barrel 82a. 82g is an adjusting screw for adjusting the position of the SPD 82d. When the position of the SPD 82d is adjusted, the position of the SPD base plate 82e is adjusted by rotating the adjusting screw 82g with the fixing screw 82i loosened, and the SP 82 is tightened by tightening the holder 82f at a predetermined position.
The position of D82d is fixed.

The holder 82f is used for the light receiving lens barrel 8
2a with the fixing screw 82h fitted in from the rear end side.
Is fastened and fixed. The light receiving lens barrel 82a has a cylindrical portion extending from the distal end of the light receiving lens 82b. The cylindrical portion measures the reflected light from the surface of the object 4 to be guided to the light receiving lens 82b. It is exposed to the space 1a. The light receiving lens 82b condenses the reflected light into a spot light LS1 (see FIG. 3A) having a required diameter, and
The light is guided to the light receiving surface d. At the rear end of the SPD 82d, a lead wire for extracting a light reception signal as an electric signal corresponding to the light reception amount and leading it to a processing unit described later is connected.
As a photo sensor, instead of SPD, CCD
(Solid-state imaging device) may be used.

FIG. 3 is a plan view of the SPD 82d as viewed from the light receiving surface side. The SPD 82d is configured such that one cell is divided and arranged at four equally-spaced positions in the circumferential direction. In the following description, these four cells are represented as Ce1 to Ce4 for convenience in relation to the spot light LS1.

Here, the adjustment of the mounting position of the SPD 82d and the angle in the circumferential direction will be described.

Now, when the main body of the colorimeter is tilted in the plus direction (clockwise around the opening 31 in FIG. 1) on the X plane, the light reception at the cells Ce2 and Ce3 increases, and When tilted in the negative direction, the amount of light received by the cells Ce1 and Ce4 increases. Further, the colorimeter main body is in the plus direction on the Y plane (in FIG. 2, clockwise around the opening 31).
, The light reception at the cells Ce1 and Ce2 increases,
When tilted in the minus direction on the Y plane, the cells Ce3, C3
The amount of light received at e4 increases. Therefore, when the main body of this device is in a vertical posture (reference posture) with respect to the surface of the object to be measured,
Adjustment is performed, for example, at the production stage so that the light reception amounts of the four cells Ce1 to Ce4 match.

On the other hand, it is difficult to finely adjust the position of the SPD 82d so that the four cells Ce1 to Ce4 are uniformly irradiated with the light from the LED 81d even in the reference posture, and furthermore, the adjustment for that is necessary. Therefore, uniform irradiation may be equivalently realized by processing on the signal side as described below.

The adjustment at this time can be performed in a calibration process for calibrating the characteristic variation of each device using a reference white calibration plate. That is, at this time, the reflected light from the white calibration plate is received by each of the cells Ce1 to Ce4, and the output voltage from each of the cells Ce1 to Ce4 according to the amount of received light is taken in. From this voltage value, a calibration coefficient for the output voltage of the light receiving surface of each of the cells Ce1 to Ce4 is determined and taken in.

Now, cells Ce1, Ce2, Ce3, Ce4
Is V1, V2, V3, and V4, the calibration coefficient K1 of the cell Ce1 is (VT / 4) / V1. Similarly, K2 is (VT / 4) / V2.
K3 is (VT / 4) / V3, and K4 is (VT / 4)
/ V4. However, VT = V1 + V2 + V3
+ V4. By multiplying these calibration coefficients K1 to K4 by the output voltage value of each corresponding cell at the time of actual measurement, the output voltage from each cell is obtained when the apparatus main body is in a vertical posture with respect to the surface of the object to be measured. Can be matched.

In this adjustment step, the sensor SPD8
Adjustment of the circumferential angle of 2d is also performed. That is, the cells Ce1 to CE4 constituting the sensor SPD 82d need to correspond exactly to the four quadrants divided by the X plane and the Y plane which are orthogonal to each other (the state shown in FIGS. 3A and 3B). If each cell does not correspond to the X and Y planes of the apparatus main body (the state of FIG. 3C), the actual inclination direction of the apparatus main body does not match the calculation result of the inclination, and as a result, This is because the irradiation angle and the light receiving angle of the colorimetric optical system with respect to the surface of the object to be measured are deviated, and an accurate colorimetric result cannot be obtained.

The circumferential angle of the sensor SPD 82d is adjusted by tilting the main body of the sensor in the plus (or minus) direction on the X (or Y) plane and examining the change in the output voltage value of each cell at this time. Done.

As shown in FIG. 3 (b), when the directions of the cells are accurately aligned with the respective quadrants, the main body of the colorimeter is moved in the plus direction on the Y plane as described above. To the spot light LS1 as shown in FIG.
Moves to the light receiving surface side of the cells Ce1 and Ce2, the output voltage values V1 and V2 of the cells Ce1 and Ce2 increase, and conversely, the output voltage values V3 and V4 from the cells Ce3 and Ce4 decrease. At this time, if the relationship between the output voltage values of the cells is always (V1 + V4) = (V2 + V3), it means that the cell direction is set correctly. To be more accurate, or alternatively, instead of the Y plane, X
A confirmation process of (V1 + V2) = (V3 + V4) may be performed on a plane.

On the other hand, as shown in FIG. 3 (c), when the colorimetric device body is tilted in the plus direction on the Y plane when the cell direction is LS1 moves to the light receiving surface side of the cells Ce1 and Ce2, and the output voltage values V1 and V2 of the cells Ce1 and Ce2 increase, and conversely, the output voltage values V3 and V of the cells Ce3 and Ce4.
4 is reduced, and the result is apparently similar to that of FIG. 3B. At this time, the relationship between the output voltage values of the respective cells is as shown in FIG.
As is clear from (c), since V1 <V2,
(V1 + V4) <(V2 + V3), which is not equal. In this case, although the main body of the colorimetric device is actually inclined in the plus direction on the Y plane, the result of the calculation is a combined direction of the plus direction of the Y plane and the plus direction of the X plane. Becomes Then, the fixing screw 82h is loosened and the holder 82f is rotated to obtain (V1 + V4) = (V2
After the angle is adjusted so as to be + V3), the fixing screw 82h is fastened. The number of cells is
There may be three, and these are arranged every 120 °. In this case, the inclination shift amount may be calculated separately for each vector component.

As shown in FIG. 2, the posture adjusting mechanism 9 is provided at a rear portion inside the outer cover 2. The details of the attitude adjusting mechanism 9 are shown in FIG. 4, which is a plane parallel to the X plane and equidistant from the center of the opening 31 (in a mirrored relationship to each other). Have been. Since the pair of attitude adjusting mechanisms 9 have the same structure, one of the configurations will be described below.

Reference numerals 91a and 91b denote base plate shafts having a predetermined length and standing upright from the lower surface of the outer cover 2 at predetermined intervals.
Small diameter portions 191a and 191b are formed at the top. Two gear base plates 9 are provided between the small diameter portions 191a and 191b.
2a, 92b are cylindrical spacers 93a, 93b having predetermined dimensions.
It is erected on top of each other. Gear base plates 92a, 92
b are the same positions, and motor shaft holes 192a and 192b are formed on the base plate shaft 91a side, while gear holes 292a and 292b are formed on the base plate shaft 91b side. The motor shaft 941 of the motor 94 provided below the motor shaft holes 192a and 192b is fitted and pivotally supported. The motor 94 is fixed at an appropriate position on the optical base plate 1. A gear 95 is fixedly mounted on the motor shaft 941 and between the gear base plates 92a and 92b so as to be integrally rotatable.

Gear holes 292a, 29
A through-hole 2a is formed at a position directly below 2b, and a column-shaped support leg 96 is slidably fitted in the through-hole 2a. A screw portion 961 formed with a screw extends from the upper half of the support leg 96. A gear 97 is pivotally supported between the gear base plates 92a and 92b with the gear holes 292a and 292b as bearings. The gear 97 has a diameter that meshes with the gear 95. The gear 97 has a female screw hole 971 having a required diameter at the center thereof. The screw portion 961 is threaded through the female screw hole 971.

The support leg 96 has a foot portion 962 formed at its lower end and covered with a soft member so as to prevent the surface of the object to be measured from being damaged when it comes into contact with the object 4. In addition, since the foot portion 962 stably holds the apparatus main body in the adjustment posture, a material having a small elastic deformation or a thin layer even if it is a soft member is employed.

The support leg 96 is provided with a bearing 98 at the position of the through hole 2a.
It is supported upright to prevent vibration.
The support leg 96 has a cut groove 963 formed in a predetermined length along the axial direction on one side surface portion in the circumferential direction. Reference numeral 99 denotes a pin-shaped rotation restricting key which can be maintained in contact with the cut groove 963 of the support leg 96 via a hole 981 formed in the bearing 98. This rotation restricting key 99 is
In a state where the support leg 96 is in contact with the main body 63, the support leg 96 is allowed to slide vertically with respect to the apparatus main body within the length of the cut groove 963, and the rotation is restricted.

When the motor 94 rotates in a required direction, this rotational force is transmitted to the gear 97 via the gear 95. The rotational force applied to the gear 97 is transmitted to a screw portion 961 that is screwed into the female screw hole 971 of the gear 97, and the screw portion 96
Since the rotation of 1 is regulated by the rotation regulating key 99, it is converted into a movement in the straight traveling direction. That is,
With the rotation of the motor 94, the support leg 96 is variably adjusted with respect to the main body of the apparatus in terms of the length of a drawer from below.

Incidentally, as the motor 94, any of a DC motor, a stepping motor, an ultrasonic motor and the like can be adopted. When a linear motor is used, the gear 9
Since 5, 97 is not required, simplification can be achieved.

The posture adjustment is performed based on the detection data from the posture detector 8 as described later. For example, when the posture is inclined in the plus direction on the X plane, FIG.
Of the support leg 96 on the left side of the
), The other side 96 'is shortened (reversal of the motor 94'). Similarly, when inclined in the minus direction, the drawer dimensions are lengthened and shortened in the opposite manner. When inclined in the plus direction on the Y plane, both support legs 96, 9
6 'is extended, while when it is inclined in the minus direction, both extension dimensions are shortened. When the inclination is related to both the X and Y planes, the above operation is repeated to gradually converge to the vertical posture. In this case, the total draw-out dimensions of the support legs 96 and 96 'for both the X and Y sides may be obtained, and the motors 94 and 94' may be driven collectively based on the calculation result.

The pull-out dimension of the support leg 96 is such that a concentric rotary encoder is provided on the rotation shaft 941 or the gears 95 and 97 of the motor 94, and the position is managed by detecting the rotation pulse from the encoder. Or, also,
A driving signal to the motor 94 or, in the case of constant-speed driving, a driving time may be managed as a drawing dimension with respect to a reference position.

The control unit for adjusting the posture includes the screw unit 9.
When the screwing position between the female screw hole 61 and the female screw hole 971 approaches a predetermined range, for example, a position of 2 mm from the upper end or the lower end of the screw portion 961, a warning message is issued or the motor 94
Drive is stopped. This prevents the female screw hole 971 from biting at the end of the screw portion 961 and preventing re-driving in the opposite direction.

FIG. 5 is a circuit block diagram of the color measuring device according to the first embodiment.

Reference numeral 10 denotes a microcomputer (hereinafter, referred to as a CPU) that controls the overall operation of the colorimeter.
A program for colorimetry is stored inside. The memory 11 stores calibration data for colorimetry, calibration data necessary for posture detection, and the like. In addition, the memory 11 stores characteristic data of an object to be measured, for example, “sample No., color material, color” and the like corresponding to thermochromism for each sample No. Note that when measuring an object to be measured having characteristic data that is not stored in the memory 11 in advance, it is also possible for the measurer to manually input the measured data.

Here, the thermochromism refers to a specific temperature characteristic of the coloring material (see Table 1). It is known that the color of a color material changes when the temperature changes.In general, when the temperature increases, the spectral reflectance distribution shifts to a longer wavelength side, and when the temperature decreases, the spectral reflectance changes to a shorter wavelength side. shift.
Also, even with the same color material, the higher the saturation, the greater the change in color value. If the color materials are different, the amount of change in color value is different even for the same color. Table 1 shows 10 ° C. for a color material having a certain saturation.
The temperature characteristic per hit, that is, the change amount Δ is shown. Table 1 is represented by an L ^* a ^* b ^* color coordinate system. E ^* a
b indicates a color difference.

[0042]

[Table 1]

Reference numeral 12 denotes an operation unit which includes a keyboard or the like and is capable of inputting operation instructions and required data, for example, the characteristic data of the object to be measured as required. I / O port 13
Indicates data from the operation unit 12 to the CPU 10 or control data from the CPU 10 to the motor 9 as described later.
4, 94 '.

PE1 to PE4 are photoelectric conversion circuits for converting signals received by the cells Ce1 to Ce4 constituting the SPD 82d into voltage level signals in which the received light amount and output voltage have predetermined linearity. Photoelectric conversion circuit PE1
To each output voltage from the next-stage A / D conversion circuit 14
Is converted into digital data and taken into the CPU 10. Reference numeral 15 denotes a light emission drive unit that causes the LED 81d for posture detection to emit light based on a control signal from the CPU 10. Reference numeral 16 denotes a temperature measurement data processing unit which takes in an output voltage from the thermopile 72 and converts this voltage into temperature data in which the voltage and the temperature measurement value have predetermined linearity. Reference numeral 17 denotes a display unit such as an LCD, which is provided at an appropriate position outside the colorimetry device and is easy to see, and which can display various types of information, or a dedicated display unit separate from the device main unit. Reference numeral 18 denotes an external output unit for outputting a color measurement result, a measured temperature, a posture detection result, and the like to an external device such as a personal computer or a printer. For example, when connected to a PC,
Colorimetric values, temperature measured values, etc. can be independently corrected, or data processing can be performed. Further, by connecting the external output unit 18 to a general-purpose robot and outputting a posture detection result, the posture can be adjusted using the general-purpose robot.
Reference numeral 19 denotes a colorimetric optical system driving unit that drives the colorimetric optical systems of the light source unit 5 and the light receiving unit 6 based on a control signal from the CPU 10.

FIGS. 6 to 9 are flowcharts showing the operation of the first embodiment. FIGS. 6 and 7 show a first operation example.
7 to 9 show a second operation example.

The first operation example is a case where the present colorimetric apparatus uses only the attitude detecting section 8 and the display section 17, and does not require the attitude adjusting mechanism section 9.

In FIG. 6, first, the type and color of the color material are input in advance so that the temperature can be corrected, and then the measurement key of the operation unit 12 is turned on (# 2, # 4). When the measurement key is turned on, posture detection is performed prior to measurement (# 6).

The "posture detection" subroutine will be described with reference to FIG. 7. First, the LED 81d is turned on, and the reflected light from the surface of the object to be measured is received by each cell of the SPD 82d (# 30, # 32). The CPU 10 calculates a posture shift (difference between the reference posture (vertical) and the current posture (inclination angle)) based on the data from each cell (# 34). That is, the displacement X on the X plane is X = K · (V1-V2-V
3 + V4), and the deviation Y on the Y plane is X
= K · (V1 + V2-V3-V4).
In this calculation, V1 to V4 above are calibrated by the above-described calibration coefficients K1 to K4 for posture detection. K is a conversion coefficient for replacing a voltage value with an angle.

Then, the deviation amount as the calculation result is displayed on the display unit 17 (# 36). The measurer adjusts the posture from the displayed deviation amount, and repeats the posture adjustment and the re-detection after the adjustment, so that the deviation amount is accurately within the allowable range, and preferably zero. . As a configuration for manual posture adjustment, instead of the motors 94 and 94 'in FIG. 4, a circular operation dial or the like having a part of the peripheral surface exposed from the apparatus main body is attached. By turning in the direction, the pointing legs 96, 9
The drawer size of 6 'may be adjusted. Also,
Instead of using the attitude adjustment mechanism 9 of FIG. 4 that can be manually operated, an appropriate method such as adjusting the attitude by adjusting the height on both sides with the number of superimposed thin sheets is adopted. It is possible. As described above, since the posture can be adjusted while checking the amount of displacement during display, this operation can be performed quickly, easily, and accurately.

In a normal colorimeter (one light source, one light receiving unit), the light source automatically emits light when the amount of deviation falls within an allowable range during the manual posture adjustment. Then, color measurement may be performed. In the case of one light source, the light emission (measurement) time is instantaneous, so that sufficiently reproducible data can be obtained even with such a configuration, and the operation can be performed quickly and easily.

FIG. 10 is experimental data showing the amount of deviation from the reference posture when the posture is adjusted based on the human feeling. This figure shows the posture adjustment by six persons A to F, in which the horizontal axis represents the number of times and the vertical axis represents the deviation angle (unit: minute) from the reference posture (vertical). As can be seen from the figure, the average shift is as much as 15 to 20 minutes, and furthermore, since there is a large difference in the amount of shift for each person, the reproducibility of the colorimetric data is low.

FIG. 11 shows a change in color difference corresponding to the amount of deviation from the reference posture of the colorimetric apparatus main body. The figure shows the change in color difference for five colors of white, gold, red, blue, and green (where white is a solid painted plate and the others are metallic painted plates). The amount (minutes) and the vertical axis are the color difference change values ΔE ^* ab. As described above, since the difference is 15 to 20 minutes on average in FIG. 10, it can be seen that the change value of the color difference corresponding to the shift amount is 1 or more for gold and close to 1 for red. On the other hand, referring to Table 1, since the change value of the color difference is equal to the change of the temperature by 10 ° C. or more, it can be understood that the error of the inclination shift includes a large error in the colorimetric result.

Returning to FIG. 6, subsequently, the light sources 51a to 53a
Are sequentially emitted, and each time, the reflected light is received by the light receiving unit 6 and colorimetric data is taken in (# 8 to # 18). Next, a colorimetric operation is performed, and L ^* , a ^* , and b ^* are calculated (# 20). After that, the thermopile 7 which is a temperature sensor
2 is turned on and temperature data is taken in (22, #
24 #). Then, using the temperature data and the temperature correction data stored in the memory 11, the corrected color values HL ^* , Ha ^* , Hb are calculated by the following arithmetic expressions (1) to (3).
^* Is required (# 26).

HL ^* = L ^* + ΔT · EL (1) Ha ^* = a ^* + ΔT · Ea (2) Hb ^* = b ^* + ΔT · Eb (3) where ΔT is the difference from the reference temperature (° C.), EL , Ea, Eb
Are the measured values HL ^* , Ha ^* , and the change values obtained per 1 ° C.
Hb ^* and the current temperature T are displayed on the display unit 17.

It should be noted that the measurer can easily confirm whether or not the measurement was performed with the position shift, since the position shift amount is displayed in # 36. Therefore, when the amount of the posture deviation is not within the allowable range, the posture adjustment is performed while confirming or remembering the displayed posture deviation amount, and the colorimetric operation is executed again. Then, once the posture is adjusted, there is no need to readjust it during a series of colorimetric operations.

Next, a second operation example will be described. Second
An operation example is a case where the posture adjustment mechanism 9 is used.

In FIG. 8, first, the type and color of the color material are input in advance so that the temperature can be corrected, and then the measurement key of the operation unit 12 is turned on (S40, # 42). When the measurement key is turned on, posture detection is performed prior to measurement (# 44). This "posture detection" subroutine is the same as that described in FIG. Subsequently, the posture adjustment I is performed (# 46).

FIG. 9 shows a subroutine of this "posture adjustment I".
This will be described below.

Here, it is determined whether or not the deviation amounts X and Y are within the allowable range, that is, −dX ≦ X ≦ dX and −dY ≦ Y ≦ dY (# 80, # 82). If any of them is within the allowable range, the process returns as it is.

If the deviation X is not within the allowable range, X> d
X is determined (# 84). If so, the motor 94 is rotated forward and the motor 94 'is reversed (# 86). Conversely, if X <-dX (NO in # 84), Motor 94
And the motor 94 'is rotated forward (# 88). At this time, it is determined whether or not the screw position with the gear 97 has reached the end of the screw portion 961 (a position 2 mm from the end in this embodiment) (# 90).
4 'is stopped and a warning is displayed (# 92, # 9)
4). If not, the subroutine "posture detection" is subsequently executed (# 96). By repeating the attitude detection and the attitude adjustment in this way, the deviation amount X is made to converge within an allowable range.

On the other hand, if the deviation amount Y is not within the allowable range,
It is determined whether or not Y> dY (# 98). If so, both motors 94 and 94 'are rotated forward (# 10).
0) Conversely, if Y <-dY (NO in # 98), both motors 94 and 94 'are reversed (# 102).
At this time, it is determined whether or not the screwing position with the gear 97 has reached the end of the screw portion 961 (# 104). If so, the drive of both motors 94 and 94 'is stopped and a warning display is displayed. (# 106, # 108). If not at the end, the “posture detection” subroutine is subsequently executed (#
110). Then, by repeating the operation of the posture detection and the posture adjustment in this way, the deviation amount Y is made to converge within an allowable range.

Next, the configuration of the second embodiment will be described with reference to FIGS.

FIG. 12 is a front sectional view, and FIG. 13 is a view of a posture adjusting mechanism viewed from a side view. In the figure, components denoted by the same reference numerals as the first embodiment perform the same functions.

The second embodiment differs from the first embodiment in that the apparatus main body is non-contact type with respect to the object to be measured.
Therefore, the ridges 32 shown in FIG. 1 are not particularly provided on the periphery of the opening 31 of the measuring leg 3 and are flush with each other.

The distance detecting section 100 includes a screw 10
1, the tip side of which is fitted into a hole 33 of a required diameter drilled at an appropriate position on a surface facing downward of the measuring leg 3 and is directed downward, thereby facing the surface of the object 4 to be measured. It is arranged. The distance detecting unit 100 includes a cylindrical holder 102 fitted in the hole 33 of the measuring leg 3, an eddy current type displacement sensor 103 fitted in the holder 102, and a screw 104 for fastening the sensor 103 and the holder 102.
And a detection signal lead wire 105.
The eddy current type displacement sensor 104 is provided with a magnetic flux generating coil and a detecting coil on a horizontal plane. At this time, the current level generated in the detection coil is detected. That is, an alternating current is applied to the magnetic flux generating coil to generate an alternating magnetic flux orthogonal to the surface of the object to be measured, and an eddy current is caused to flow through the surface of the object to be measured due to the alternating magnetic flux. The magnetic flux generated by the eddy current is received by the detection coil to detect the induced current, so that a current at a level corresponding to the distance between the measured object and the detection coil can be detected. Note that the sensor of the distance detection unit 100 may be a mechanical sensor in addition to an optical or magnetic non-contact sensor.

The posture adjusting mechanism 90 is described in detail in FIG. The attitude adjustment mechanism 90 is separately connected to the rear part of the exterior cover 2 and is connected via the optical base plate 1. Further, the posture adjusting mechanism section 90 includes a base plate 900 and a cover 901, and the adjusting mechanism is disposed inside the base plate 900 and the cover 901.

Reference numeral 902 denotes a distance adjusting shaft,
And the upper surface of the cover 901 so as to be pivotally supported.
A gear 902a having a required diameter is integrally formed at a lower end of the shaft 902, and a screw 902b is formed at other portions. A distance motor 903 is fixed downward at a rear lower end position of the cover 901 by a fastening member such as a screw.
A gear 903b meshing with 2a is provided so as to be able to rotate integrally. The lower end of the rotating shaft 903a is fitted to the base plate 900 to reinforce the shaft strength.

Reference numeral 904 denotes a movable bearing having a female screw hole 904a having a female screw formed on an inner peripheral surface thereof.
a is screwed with the screw 902b of the shaft 902. The movable bearing 904 is restricted by a vertical guide (not shown) from rotating along with the rotation of the shaft 902, and is configured to perform only vertical movement. This movable bearing 904
A horizontally oriented bearing hole 904b is bored in the front side surface.

Reference numeral 905 has a columnar shape, and its tip (FIG. 13)
Worm wheel 905a that rotates integrally near the right)
Are the first arms formed. The tip of the first arm is fitted into the bearing hole 904b, and the worm wheel 9
The rear surface portion of 05a is directly penetrated through a hole 1904c of an arm bearing member 904c attached to the movable bearing 904. Thus, the first arm 905 has the bearing hole 904b.
And the hole 1904c, it is pivotally supported in a horizontally oriented state. At the rear end of the first arm 905, a through-hole 905b is formed in a horizontal direction orthogonal to the axis, and the through-hole 905b is rotatably fitted to a horizontal connecting shaft 906 so as to be rotatable. I have.

On the other hand, a second arm 907 is attached to the rear of the optical base plate 1 at the large-diameter end on the left side in FIG. 12 with a fixing member such as a screw or a bolt and a nut so as to face rearward in the horizontal direction. Have been. The second arm 907 protrudes rearward through the exterior cover 2. A gear portion 907 a having a predetermined diameter is formed on a vertical surface at a base end thereof, and a through hole 907 b is formed at the center thereof. Have been.
The through-hole 907b is externally fitted to the connection shaft 906 and fastened by a fixing tool such as a screw so as to rotate integrally.

Reference numeral 908 denotes an X-plane motor fixed to the upper surface of the movable bearing 904 in the horizontal direction. A worm gear 908a that meshes with the worm wheel 905a is formed on the rotating shaft. 909 is a first arm 905
And a gear 909a meshing with a gear portion 907a is formed on the rotating shaft of the motor for the Y surface fixed at an appropriate position on the shaft peripheral surface.

Although the temperature detector 7 is not shown in FIG. 12, the distance detector 1
It may be mounted at a position symmetrical to 00 as shown in FIG. Further, the temperature sensor may be separate from the apparatus main body and connected by a flexible signal lead wire so as to have portability so that the temperature of the DUT 4 can be appropriately measured. Alternatively, for example, a color material having a small temperature characteristic, such as a measurement work in a temperature-controlled work space,
In particular, when temperature correction is not necessary, the same applies to the first embodiment, but the temperature detector 7 may not be provided.

In the above configuration, the distance motor 903
Is rotated, the rotational force is transmitted to the shaft 902 via the gears 903a and 902b, whereby the movable bearing 9 is rotated.
04 is raised and lowered. The first arm 905 and the second arm 907 are integrally moved up and down by moving up and down the movable bearing 904, so that the colorimeter main body moves in the direction of contact and separation of the object 4 to be measured. In this embodiment, the main body of the colorimeter is a distance motor 90.
3 to rise in the normal rotation and fall in the reverse. When the X-plane motor 908 rotates, the rotational force is transmitted to the connection shaft 906 via the worm gear 908a and the worm wheel 905a, and the second arm 907 rotates around its axis. As a result, the inclination angle of the colorimeter main body with respect to the DUT 4 on the X plane is changed. Also,
When the Y-plane motor 909 rotates, this rotational force
09a, and transmitted to the gear portion 907a,
7 rotates around the connection shaft 906. As a result, the inclination angle of the colorimeter main body with respect to the DUT 4 on the Y plane is changed.

FIG. 14 is a circuit block diagram of the second embodiment. In the drawing, those denoted by the same reference numerals as those in FIG. 5 perform the same functions.

Reference numeral 20 denotes a signal processing unit which drives the distance detecting sensor 103 based on a control signal from the CPU 10 and converts the detected signal based on predetermined linearity and outputs the converted signal. The I / O port 13 guides control data from the CPU 10 to each of the motors 903, 908 and 909.

FIGS. 15 to 18 are flowcharts showing the operation of the second embodiment.

In FIG. 15, first, the type and color of the color material are input in advance so that the temperature can be corrected (# 120).
Thereafter, when the measurement key is turned on (# 122), subsequently, distance detection and its adjustment, and posture detection and its adjustment are performed (# 124 to # 132). Then, if both the distance and the posture are within the allowable range, the colorimetric operation is subsequently started,
The obtained colorimetric result is displayed on the display unit 17 (# 134).
YES, # 136- # 156). Note that # 136 to # 136
The operation of 156 is the same as that of # 8 to # 28 in FIG. 6 (first embodiment), and the description is omitted.

FIG. 16 is a diagram showing a subroutine of "distance detection". Here, first, the eddy current displacement sensor 1
03 is turned on (# 170), the sensor output is taken in, the distance is calculated based on the sensor output (# 172), and the calculation result is displayed on the display unit 17 (# 174).

FIG. 17 is a diagram showing a subroutine "distance adjustment".

Here, the current distance L obtained in # 172
Is within the allowable range, that is, −dL ≦ L ≦ dL (# 180). If it is within the allowable range, the process returns as it is.

On the other hand, if the current distance L is not within the allowable range, it is determined whether or not L> dL (# 182). If so, the motor 903 is reversed and the apparatus body is lowered (# 184). Conversely, if L <−dL (# 182
NO), the motor 903 is rotated forward, and the apparatus main body is raised (# 186). At this time, it is determined whether the screwing position of the movable bearing 904 has reached the upper and lower ends of the shaft 902 (# 188).
Is stopped and a warning is displayed (# 190, # 19)
2). If not, the subroutine "distance detection" is subsequently executed (# 194). By repeating the distance detection and the adjustment in this manner, the current distance L
Are converged within an allowable range with respect to a predetermined reference distance.

Once the distance detection and its adjustment (# 124, # 12)
When 126) is completed, the posture detection and its adjustment are subsequently performed (# 128, # 130). The operation of posture detection is the same as that in FIG.

FIG. 18 is a diagram showing a subroutine of "posture adjustment II" of # 130.

Here, it is determined whether or not the deviation amounts X and Y are within the allowable range, that is, −dX ≦ X ≦ dX and −dY ≦ Y ≦ dY (# 200, # 202). If any of them is within the allowable range, the process returns as it is.

If the deviation X is not within the allowable range, X> d
X is determined (# 204), and if so, the motor 908 is reversed (# 206), and conversely, X <-dX
If it is (NO in # 204), the motor 908 is rotated forward (# 208), and the movement of the apparatus main body is controlled so that the displacement X becomes zero. At this time, the screwing position with the worm gear 908a is set at the end of the worm wheel 905a (X of the apparatus main body).
It is determined whether or not a predetermined rotation limit value on a plane has been reached (# 210). If it has reached, the drive of the motor 908 is stopped and a warning display is performed (# 212, # 21).
4). If not at the end, a subroutine "posture detection" is subsequently executed (# 216). By repeating the attitude detection and the attitude adjustment II in this manner, the shift amount X
Are converged within an allowable range.

On the other hand, if the deviation amount Y is not within the allowable range,
It is determined whether or not Y> dY (# 218). If so, the motor 909 is reversed (# 220), and conversely, Y <dY.
If −dY (NO in # 218), the motor 909 is rotated forward (# 222). At this time, it is determined whether or not the screw position with the gear 909a has reached the end of the gear portion 907a (both ends where the gear is formed, or a predetermined rotation limit value on the Y plane of the apparatus main body) (# 224). , The driving of the motor 909 is stopped and a warning is displayed (# 22).
6, # 228). If not at the end, a subroutine "posture detection" is subsequently executed (# 230). By repeating the operation of the posture detection and the posture adjustment II in this way, the deviation amount Y is made to converge within an allowable range.

When the posture detection and the posture adjustment II are completed, the distance detection is confirmed again (# 132). This is # 1
The case where the distance to the DUT 4 is changed by swinging the apparatus main body in the X and Y plane directions in the posture adjustment of # 130 after performing the distance adjustment at 26 is considered. FIG.
Is detected, and if the obtained current distance L is within the allowable range (YES in # 134), the process proceeds to the colorimetric operation as described above. If the result of the re-detection is not within the allowable range, the operations of # 124 to # 132 are repeated.

FIG. 19 is a side sectional view showing another embodiment of the temperature detector 7. In FIG.

The temperature detecting section 7 ′ is provided on the optical base plate 1 as in the first embodiment, but is mounted at the front of the light source section 5. Note that, in this case, the posture detection unit 8 is disposed at another position. And thermopile 7
By providing the condenser lens 75 'in front of 2', required measurement accuracy can be ensured even when the distance to the object to be measured increases. The optical axes of the thermopile 72 'and the condenser lens 75' are aligned with the center of the opening 3, and the tip of the holder 71 'is moved along the optical axis to the measurement space 1.
The temperature of an object to be measured at the same position as the colorimetric position can be measured by extending to a.

If the temperature correction of the colorimetric values is not performed, # 2 and # 26 (and # 40, # 66, # 120 and # 154 corresponding thereto) are unnecessary in the colorimetric operation. It is. In this case, only the measured current temperature T may be displayed, or the temperature measurement operation itself (# 22, # 2)
The display of the temperature may not be performed except for 4).

FIGS. 20 to 22 show the structure of the third embodiment. FIG. 20 is a front sectional view and FIG. 21 is a side sectional view. In the drawings, components denoted by the same reference numerals as the first and second embodiments perform the same functions. Although not shown, it is assumed that the temperature detector 7 is provided at an appropriate position as in the first and second embodiments.

In the third embodiment, a posture adjusting mechanism 110 is employed in place of the posture adjusting mechanism 9 of the first embodiment. Specifically, in the first embodiment, the outer cover 2 fixedly includes the optical base plate 1 and the posture adjusting mechanism 9
Has performed the posture adjustment by integrally driving the optical base plate 1 and the exterior cover 2, but in the third embodiment, the exterior cover 2 movably includes the optical base plate 1, and the posture adjustment mechanism unit Numeral 110 drives only the optical base plate 1 (at this time, the exterior cover 2 is fixed to the DUT 4) to adjust the posture. Hereinafter, a third embodiment will be described.

In FIG. 20, bearings 111a, 111b
Are fixed on both sides of the exterior cover 2 by fixing screws (not shown) so as to be horizontal on the Y plane. The attitude adjustment base plate 112 is shown by hatching in the figure, and the attitude adjustment base plate 112 has rotation support shafts 112a and 112b formed at both ends thereof. The rotation support shafts 112a and 112b are fitted to bearings 111a and 111b, respectively. Thereby, the posture adjustment base plate 1
Reference numeral 12 is rotatably supported on the exterior cover 2 in the Y plane.

The Y surface mower 113 is fixedly arranged on the peripheral surface of the bearing, for example, on the upper part by a fixing bracket (not shown), and its rotating shaft 113a is provided with a gear 113b. The gear 113b is a gear 11 provided on the rotation support shaft 112a.
12a. With this configuration, when the Y-plane motor 113 rotates, this rotational force is applied to the gears 113b,
The posture adjustment base plate 112 is transmitted via the rotation support shafts 112a and 112b. As a result, the outer cover 2 remains fixed to the DUT 4,
The inclination angle of the optical base plate 1 with respect to the DUT 4 on the Y plane is changed.

In FIG. 21, the optical support plate 1 is provided with rotation support shafts 1A and 1B at front and rear positions which are horizontal on the X-plane, respectively.
Reference numerals A and 1B denote bearings 11 provided on a posture adjusting base plate 112.
2c and 112d, respectively. Thus, the optical base plate 1 is supported rotatably on the X plane with respect to the posture adjusting base plate 112.

The X-plane motor 114 is fixed on the attitude adjusting base plate 112 by a fixture (not shown). A worm gear 115 is provided on a rotation shaft 114a of the X-plane motor 114, and the worm gear 115 meshes with a worm wheel 1C provided on the rotation support shaft 1B. With this configuration, when the X-plane motor 114 rotates, the rotational force is transmitted through the worm gear 115 and the worm wheel 1C, and the optical base plate 1 rotates about the rotation support shafts 1A and 1B. Thus, the optical base plate 1 is fixed while the exterior cover 2 is fixed to the DUT 4.
Is changed with respect to the DUT 4 on the X plane.

Motors 113 and 114 in the third embodiment
Is performed as follows. For example, if the posture is X
When inclined in the plus direction on the plane, the X-plane motor 114 is rotated forward, and conversely, when inclined in the minus direction. When the motor 113 is inclined in the plus direction on the Y plane, the motor 113 for the Y surface is rotated forward, and when inclined in the minus direction, the motor 113 is reversed.

The circuit configuration in the third embodiment may be replaced by motors 113 and 114 instead of the motors 94 and 94 'of the first embodiment shown in FIG. The operation order of the third embodiment is the same as that of the second operation example of the first embodiment shown in FIGS.
6, # 88, and # 92, respectively,
Steps # 100, # 102, # 1 are "forward rotation", "X-plane motor 114 inversion", and "X-plane motor 114 stopped".
06 may be set as “Y-plane motor 113 forward rotation”, “Y-plane motor 113 reverse”, and “Y-plane motor 113 stop”, respectively. Regarding the "end determination" in steps # 90 and # 104, the angle at which the optical base plate 1 is inclined may be limited in advance, and it may be determined whether or not the angle has exceeded this angle. As described above, since the circuit configuration and the operation order of the third embodiment can be easily changed from those of the first embodiment, further description is omitted.

FIG. 22 shows a measuring leg 3 'suitable for the third embodiment.
It is shown.

In the first embodiment, the measuring leg 3 is provided with a circumferential ridge 32 having a predetermined dimension and bent downward at the periphery of the opening 31 thereof. 32 is configured to abut on the surface of the DUT 4. However, in this configuration, since the abutting portion with the DUT 4 has a planar shape, the holdability of the device is unstable with respect to the DUT 4 having a curved surface. FIG.
(A) and (b) are diagrams illustrating this state, in which (a) is a bottom view of the ridge 32 and (b) is a front view of the ridge 32. That is, in the case of the first embodiment, since the optical base plate 1 and the outer cover 2 are integrally adjusted, that is, the attitude is adjusted by driving the entire apparatus, even if the holdability of the apparatus is unstable, the attitude adjusting mechanism is used. The proper posture is maintained by the unit 9. However, in the case of the third embodiment, since only the optical base plate 1 is driven and the posture is adjusted while the outer cover 2 is fixed, it is necessary to stably hold the apparatus with respect to the DUT 4.

FIGS. 22 (c) and 22 (d) show the structure of the measuring leg 3 'which can stably hold the device even with respect to the DUT 4 having a spherical surface. Is a bottom view and FIG. (D) is a front view. In the figure, instead of the ridge 32, five protrusions 3A, 3B.
3C, 3D, and 3E are provided at, for example, predetermined intervals in a front view. According to this configuration, for the DUT 4 having a planar surface, the five protrusions 3A to 3A are provided.
All E contact the DUT 4 and hold the device at these five points. On the other hand, for the DUT 4 having a spherical surface, three of the five protrusions 3B, 3C,
The 3D contacts the DUT 4 and holds the device at these three points. By forming the projections 3A to 3E on the periphery of the opening 31 'of the measuring leg 3' in this way, the measurement target 4 having a spherical surface as well as the measurement target having a flat surface is provided.
, The device can be stably held.

[0102]

According to the present invention, since the temperature of an object to be measured is detected, a colorimetric value calculated based on a light receiving signal from the object to be measured is changed according to the temperature of the object to be measured. A corrected colorimetric value can be obtained.

[Brief description of the drawings]

FIG. 1 is a front sectional view showing a configuration of a first embodiment.

FIG. 2 is a side sectional view showing the configuration of the first embodiment.

FIG. 3A is a view showing the structure of a sensor of a posture detection unit showing a configuration of a first embodiment; FIG. 3B is a view showing a moving direction of a spot light on a cell due to an inclination of an apparatus main body with respect to the sensor;
(C) is a diagram showing the direction of movement of the spot light on the cell due to the inclination of the apparatus main body when the sensors are not correctly arranged in the circumferential direction.

FIG. 4 is a view of a posture adjusting mechanism showing the configuration of the first embodiment as viewed from the rear.

FIG. 5 is a circuit block diagram of the colorimetric device according to the first embodiment.

FIG. 6 is a flowchart illustrating an operation of “measurement I” which is a first operation example in the first embodiment.

FIG. 7 is a diagram illustrating a subroutine of “posture detection” in the first operation example.

FIG. 8 is a second operation example of the first embodiment, “Measurement I”.
It is a flowchart which shows operation | movement of "I".

FIG. 9 is a diagram illustrating a subroutine of “posture adjustment I” in a second operation example.

FIG. 10 is a table showing experimental data indicating a posture shift amount from a reference posture when a posture is adjusted based on human feeling.

FIG. 11 is a table showing a change in color difference corresponding to a deviation of a colorimetric device main body from a reference posture.

FIG. 12 is a front sectional view showing the configuration of the second embodiment.

FIG. 13 is a side view of a posture adjusting mechanism showing the configuration of the second embodiment.

FIG. 14 is a circuit block diagram of a second embodiment.

FIG. 15 is a flowchart illustrating an operation of “measurement III” according to the second embodiment.

FIG. 16 is a diagram showing a subroutine of “distance detection” in the second embodiment.

FIG. 17 is a diagram showing a subroutine of “distance adjustment” in the second embodiment.

FIG. 18 is a diagram showing a subroutine of “posture adjustment II” in the second embodiment.

FIG. 19 is a side sectional view showing another embodiment of the temperature detector 7;

FIG. 20 is a front sectional view showing the configuration of the third embodiment.

FIG. 21 is a side sectional view showing the configuration of the third embodiment.

22 (a) is a bottom view of the ridge portion in the first embodiment, FIG. 22 (b) is a front view of the ridge portion in the first embodiment,
(C) is a bottom view of the measuring leg in the third embodiment, and (d) is a front view of the measuring leg in the third embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Optical base plate 1a Measurement space 2 Exterior cover 3, 3 'Measurement leg 31, 31' Opening 32 Projection 3A-3E Projection 4 Object to be measured 5 Light source part 6 Light receiving part 7, 7 'Temperature detecting part 8 Attitude detection Unit 81d LED 82d SPC Ce1-Ce4 Cell constituting SPD 9, 90, 110 Attitude adjusting mechanism 94, 94 ', 113, 114 Motor 96, 96' Support leg 961 Screw 971 Female screw hole 903, 908, 909 Motor 904 Movable bearing 905 First arm 906 Connecting shaft 907 Second arm 100 Distance detection unit 10 CPU 11 Memory 12 Operation unit 17 Display unit

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Isamu Nakajima 2-3-13 Azuchicho, Chuo-ku, Osaka-shi Osaka International Building Minolta Co., Ltd.

Claims (2)

[Claims] 1. A colorimeter for irradiating an object to be measured with light and receiving reflected light from a surface of the object to obtain a light receiving signal.
Temperature detecting means for detecting a temperature, storage means for storing temperature characteristic data of the device under test, and calculating a colorimetric value based on the light receiving signal, and detecting the colorimetric value as the detected temperature and the temperature characteristic data. And a calculating means for performing correction based on the colorimetric data. 2. The temperature characteristic data is a change amount of a colorimetric value per unit temperature, and the calculating means corrects the colorimetric value based on a difference between a detected temperature and a reference temperature and the change amount. The colorimetric apparatus according to claim 1, wherein the colorimetry is performed.