Temperature control device and color measurement system

Abstract

To provide a temperature control device and a color measurement system capable of stably measuring a reflection spectrum of visible light on the surface of an object by stabilizing temperature of the surface of the object to be measured with a simple configuration.SOLUTION: A temperature control device 20 includes: a holder 40 having a mounting section 41 configured so as to be capable of mounting a measurement object 80 having an object surface 81 for measuring color characteristics by a color measuring device 10 and piping 46 for supplying gas with which the object surface 81 is sprayed; and a gas supply device 30 for controlling temperature of gas and supplying it. The mounting section 41 has a sidewall 45 for dividing a space 44 positioned between the object surface 81 and the color measuring device 10 along with the object surface 81 and the color measuring device 10. One end of the piping 46 is positioned in a sidewall 45 such that gas is jetted out toward the object surface 81 in the space 44.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present disclosure relates to a temperature control device and a color measurement system. [Background technology]

[0002] BACKGROUND ART Conventionally, a color detection device that determines the color characteristics of an object within a given temperature range is known (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2005-308764 Summary of the Invention [Problem to be solved by the invention]

[0004] The visible light reflectance spectrum of an object's surface, which is one of the object's color characteristics, changes depending on the temperature of the surface that reflects the visible light. In other words, the measurement result of the visible light reflectance spectrum of an object's surface is affected by temperature changes. To reduce the effect of temperature changes, it is possible to maintain the measurement environment temperature within a given temperature range, as described in Patent Document 1.

[0005] However, in order to control the measurement environment temperature within a given temperature range, a large-scale facility such as a temperature-controlled measurement room is required. Even if the temperature in the measurement room is controlled, the surface temperature of the object to be measured may not be stable due to heat generated by the reflectance spectrum measurement device, for example.

[0006] It is required to stabilize the temperature of the surface of an object to be measured using a simple configuration and to stably measure the visible light reflection spectrum of the object surface.

[0007] The present disclosure has been made in consideration of the above points, and aims to provide a temperature control device and a color measurement system that can stabilize the temperature of the surface of an object to be measured with a simple configuration and stably measure the reflection spectrum of visible light from the surface of the object. [Means for solving the problem]

[0008] (1) According to some embodiments, a temperature control device includes a mounting portion configured to support a measurement object having a target surface whose color characteristics are to be measured by a color measurement device, a holder having a pipe for supplying gas to be sprayed onto the target surface, and a gas supply device for supplying the gas while controlling the temperature. The mounting portion has a sidewall that, together with the target surface and the color measurement device, defines a space between the target surface and the color measurement device. One end of the pipe is positioned on the sidewall so that the gas is sprayed toward the target surface within the space.

[0009] The temperature control device can stabilize the temperature of the target surface of the measurement object with a simple configuration by controlling the temperature of the gas and spraying it onto the target surface of the measurement object. As a result, the color measurement device can stably measure the visible light reflectance spectrum of the target surface without being affected by temperature changes of the target surface. In other words, the accuracy of measuring the visible light reflectance spectrum of the target surface by the color measurement device is improved.

[0010] (2) In the temperature control device described in (1) above, the mounting portion may have a protrusion that supports the object to be measured so that the object to be measured is spaced a predetermined distance from the mounting portion.

[0011] When the object to be measured is moved a predetermined distance away from the mounting portion, the gas supplied to the space flows through the gap created by the distance between the object to be measured and the mounting portion, from the center of the object surface toward the periphery, along the object surface, and outflows from the space. The gap between the object to be measured and the mounting portion stabilizes the flow of gas flowing out of the space. The stabilized gas flow allows the gas to come into uniform contact with the object surface. The uniform contact of the gas with the object surface results in a uniform temperature of the object surface. As a result, the accuracy of measuring the visible light reflectance spectrum of the object surface by the color measuring device is improved.

[0012] (3) In the temperature control device described in (1) or (2) above, the holder may be configured to allow the color measuring device to be attached and detached.

[0013] By configuring the holder so that the color measurement device can be attached and detached, calibration of each of the plurality of color measurement devices can be easily performed simply by replacing the color measurement device.

[0014] (4) In the temperature control device according to any one of (1) to (3) above, the holder may be configured so that a heat insulating member can be installed at a position where the object to be measured is sandwiched between the holder and the placement portion.

[0015] By sandwiching the object to be measured between the mounting portion and the heat insulating member, the influence of heat emitted from the object surface or the influence of heat conducted to the object surface is reduced, and as a result, when the object to be measured is placed on the holder for a long period of time, the energy efficiency for controlling the object surface to a predetermined temperature is improved.

[0016] (5) In some embodiments, a color measurement system includes a temperature control device described in any one of (1) to (4) above, and a color measurement device that measures the color characteristics of the target surface of a measurement object whose temperature is controlled by the temperature control device.

[0017] By controlling the temperature of the object surface of the object to be measured by the temperature control device, the accuracy of measuring the visible light reflectance spectrum of the object surface by the color measurement device can be improved without placing the entire color measurement system in an environment with a uniform temperature. [Effects of the Invention]

[0018] According to the present disclosure, a temperature control device and a color measurement system are provided that are simply configured to stabilize the temperature of the surface of an object to be measured and to stably measure the reflection spectrum of visible light from the surface of the object. [Brief explanation of the drawings]

[0019] [Figure 1] FIG. 1 is a schematic diagram showing a color measurement system according to a comparative example. [Figure 2] FIG. 1 is a plan view illustrating an example of the configuration of a color measurement system according to an embodiment. [Figure 3] 3 is a cross-sectional view taken along the line AA in FIG. 2. [Figure 4] 1 is a block diagram illustrating an example of the configuration of a temperature control device according to an embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0020] (Comparative Example) The visible light reflectance spectrum of an object's surface changes depending on the temperature of the surface that reflects the visible light. In other words, the measurement results of the visible light reflectance spectrum of an object's surface are affected by temperature changes. It is necessary to reduce the influence of temperature changes and measure the visible light reflectance spectrum stably. Stable measurement is particularly important when measuring the visible light reflectance spectrum as reference data. Stable measurement leads to improved measurement accuracy.

[0021] In order to reduce the influence of temperature changes and stably measure the reflectance spectrum of visible light, it is possible to control the temperature of the measurement environment in which the measurement device is installed. As shown in Fig. 1, a color measurement system 90 according to a comparative example includes a color measurement device 91 and a measurement room 97 that houses the color measurement device 91. The measurement room 97 is equipped with a temperature control device 98 that controls the temperature inside the room within a predetermined range. The color measurement device 91 includes an irradiation unit 92 that irradiates a measurement object 96 with measurement light 94, and a detection unit 93 that detects reflected light 95 that is the measurement light 94 reflected by the measurement object 96.

[0022] In the color measurement system 90 according to the comparative example, the temperature of the measurement object 96 is stabilized, in principle, at the ambient temperature of the measurement chamber 97. The stabilization of the temperature of the measurement object 96 stabilizes the measurement results of the visible light reflectance spectrum of the surface of the measurement object 96. However, the cost of installing the measurement chamber 97 and the cost of controlling the temperature inside the measurement chamber 97 increase.

[0023] If the color measuring device 91 can only be used in the measurement room 97, it will be difficult to move the color measuring device 91 to another location for use. In other words, the convenience of the color measuring device 91 will decrease.

[0024] Even when the ambient temperature of the measurement room 97 is stable, the irradiation unit 92, which irradiates the measurement light 94, of the color measurement device 91 may generate heat. Because the irradiation unit 92 irradiates the measurement light 94 onto the measurement object 96, there is no obstruction between the measurement object 96 and the irradiation unit 92. Therefore, the temperature of the measurement object 96 may change due to radiation from the irradiation unit 92 to the measurement object 96. The change in the temperature of the measurement object 96 changes the measurement result of the visible light reflection spectrum of the surface of the measurement object 96. In other words, the measurement result may be unstable due to the influence of the color measurement device 91.

[0025] As described above, in the color measurement system 90 according to the comparative example, the cost of installing the measurement room 97, or the influence of radiation from heat-generating parts present in the color measurement device 91 even within the measurement room 97, can be problematic.

[0026] Therefore, with reference to Figures 2 to 4, this disclosure describes a temperature control device 20 and a color measurement system 1 that can stably measure the visible light reflection spectrum of the target surface 81 of the measurement object 80 with a simple configuration even if the color measurement device 10 includes a heat-generating part.

[0027] (Example of color measurement system 1 configuration) 2 and 3, a color measurement system 1 according to an embodiment of the present disclosure includes a color measurement device 10 that measures color characteristics of a target surface 81 of a measurement target 80, and a temperature control device 20 that controls the temperature of the target surface 81 of the measurement target 80. The temperature control device 20 includes a holder 40 that holds the measurement target 80, and a gas supply device 30. The temperature control device 20 is configured to control the temperature of the target surface 81 to a predetermined temperature by spraying gas at a predetermined temperature onto the target surface 81 of the measurement target 80. The gas supply device 30 supplies the gas, the temperature of which has been controlled to the predetermined temperature, to the holder 40.

[0028] <Color measuring device 10> The color measurement device 10 measures the color of an object surface 81 of an object 80 to be measured. Specifically, the color measurement device 10 measures the visible light reflectance spectrum of the object surface 81. The lower limit of the wavelength range of visible light is assumed to be, for example, 360 nm to 400 nm. The upper limit of the wavelength range of visible light is assumed to be, for example, 760 nm to 830 nm. The color measurement device 10 includes an irradiation unit 11, a detection unit 12, and a control unit 13.

[0029] The irradiating unit 11 irradiates the target surface 81 with measurement light that includes at least components with wavelengths in the range of visible light. The irradiating unit 11 may include a light source such as a lamp or an LED (Light Emitting Diode).

[0030] The detection unit 12 detects the spectrum of reflected light, which is measurement light reflected by the target surface 81. The detection unit 12 may be configured by combining a spectroscope and a detection element so as to detect the intensity of each wavelength component contained in the reflected light. The spectroscope may include a monochromator or the like. The detection element may include a PD (Photo Diode) or a phototransistor or the like.

[0031] The control unit 13 acquires the spectra of the measurement light and the reflected light. The control unit 13 may control at least one of the irradiation unit 11 and the detection unit 12. The control unit 13 calculates the reflection spectrum of the target surface 81 based on the difference between the spectrum of the measurement light and the spectrum of the reflected light. The control unit 13 may be configured to include a processor such as a CPU (Central Processing Unit) or a dedicated circuit such as an FPGA (Field Programmable Gate Array). The control unit 13 may be configured to execute programs that realize various functions of the color measurement device 10.

[0032] The control unit 13 may include a storage unit. The storage unit may store various information used in the operation of the control unit 13, or programs for realizing the functions of the control unit 13. The storage unit may function as a work memory for the control unit 13. The storage unit may be configured as a semiconductor memory, for example. The storage unit may be configured separately from the control unit 13.

[0033] The color measurement device 10 may further include an interface. The interface may include, for example, a communication interface for communicating with an external device via a wired or wireless connection. The interface may include a display device. The display device may include various displays such as a liquid crystal display. The interface may also include an audio output device such as a speaker. The interface may also include an input device for receiving input from a user. The input device may include, for example, a keyboard or physical keys, a touch panel or touch sensor, or a pointing device such as a mouse.

[0034] <Holder 40> The holder 40 includes a mounting portion 41 and an edge portion 42. The mounting portion 41 is configured so that the object 80 to be measured can be placed on it with its target surface 81 facing the color measurement device 10, which is located in the negative direction of the Z axis when viewed from the holder 40. The edge portion 42 is configured so that the position of the object 80 on the mounting portion 41 along each of the X and Y axes is limited when the object 80 to be measured is abutted against the edge portion 42. When the object 80 to be measured is rectangular in plan view in the Z axis direction, the edge portion 42 may be configured so that only the corners of the object 80 to abut against the edge portion 42. The edge portion 42 may be configured to include an elastic material, such as a sponge, in a portion other than the portion against which the object 80 to be measured is abutted.

[0035] The mounting portion 41 has a protrusion 43 that protrudes in the positive direction of the Z axis. The protrusion 43 supports the target surface 81 of the measurement object 80, thereby creating a gap between the mounting portion 41 and the target surface 81, the distance of which corresponds to the height of the protrusion 43. In other words, the protrusion 43 supports the measurement object 80 so that the measurement object 80 is spaced a predetermined distance from the mounting portion 41.

[0036] The mounting portion 41 is configured so as not to block the measurement light coming from the color measurement device 10 and the reflected light heading toward the color measurement device 10 when the measurement object 80 is placed on it. Specifically, a space 44 is defined within the mounting portion 41, through which the measurement light and the reflected light can pass. In other words, the presence of the space 44 exposes the object surface 81 to the color measurement device 10. The holder 40 has a side wall 45 that defines the space 44. The shape of the side wall 45 is circular when viewed in a plan view in the Z-axis direction. The shape of the side wall 45 is not limited to a circular shape when viewed in a plan view in the Z-axis direction, and may be various other shapes.

[0037] The holder 40 includes a pipe 46 that connects the gas supply device 30 and the space 44. One end of the pipe 46 on the space 44 side is located on the side wall 45 so that gas is ejected toward the target surface 81 within the space 44. In other words, the pipe 46 has openings on both ends. The opening of the pipe 46 on the space 44 side is located on the side wall 45. The gas supplied from the gas supply device 30 passes through the pipe 46 and is ejected into the space 44 from the opening of the pipe 46 located on the side wall 45.

[0038] Holder 40 includes a temperature measuring unit 47 located near the opening of pipe 46. Temperature measuring unit 47 measures the temperature of the gas ejected from the opening of pipe 46 into space 44. Temperature measuring unit 47 may include a temperature sensor such as a thermistor or a thermocouple. Temperature measuring unit 47 outputs the measurement result of the gas temperature or an electrical signal corresponding to the gas temperature to gas supply device 30.

[0039] The gas supplied from the gas supply device 30 through the pipe 46 to the space 44 is indicated by a dashed arrow as inflow gas 48. The inflow gas 48 supplied to the space 44 fills the space 44. The gas causes the pressure in the space 44 to be more positive than the pressure outside the space 44. As a result, the gas that has flowed into the space 44 flows out of the space 44 through the gaps between the measurement object 80 and the mounting portion 41 and the edge portion 42. The gas flowing out of the space 44 is indicated by a dashed arrow as outflow gas 49.

[0040] At least a portion of the inflow gas 48 that has flowed into the space 44 is sprayed onto the target surface 81 of the object to be measured 80 and flows along the target surface 81 before flowing out of the space 44 as outflow gas 49. The outflow gas 49 also passes through the gap between the mounting portion 41 and the target surface 81, passing from the center of the object to be measured 80 outward, around the entire periphery of the object to be measured 80, and flows out of the space 44. The mounting portion 41, protrusions 43, and sidewall 45 of the holder 40 may be configured so that the outflow gas 49 flows evenly around the object to be measured 80.

[0041] The color measuring device 10 may be attached to a holder 40. In other words, the holder 40 may be configured to allow the color measuring device 10 to be attached and detached.

[0042] <Gas supply device 30> 4, the temperature control device 20 includes a gas supply device 30 and a holder 40. The gas supply device 30 includes a regulator 31, a cooling unit 32, a heating unit 33, and a control unit 34, and supplies gas, the temperature of which is controlled to a predetermined temperature, to the holder 40 through a pipe 46. The gas supply device 30 may supply various gases, such as atmospheric air, dry air, or nitrogen gas.

[0043] The regulator 31 adjusts the flow rate of the gas. The cooling unit 32 cools the gas. The cooling unit 32 may be configured to include, for example, a vortex cooler. The heating unit 33 heats the gas. The heating unit 33 may be configured to include, for example, a heater. In the gas supply device 30, the gas whose flow rate has been adjusted by the regulator 31 is cooled by the cooling unit 32 and then heated by the heating unit 33. By heating the gas after cooling, the temperature of the gas is adjusted to a temperature similar to the temperature of the location where the color measurement system 1 is installed. Furthermore, by maintaining the gas flow rate constant by the regulator 31, the temperature of the gas is stably adjusted.

[0044] The control unit 34 controls the regulator 31, the cooling unit 32, and the heating unit 33. The control unit 34 may be configured to include a processor or a dedicated circuit. The control unit 34 acquires a measurement result of the temperature of the gas ejected from the opening of the pipe 46 into the space 44 from the temperature measurement unit 47 of the holder 40. Based on the measurement result of the gas temperature by the temperature measurement unit 47, the control unit 34 controls the regulator 31, the cooling unit 32, and the heating unit 33 so that the temperature of the gas ejected from the opening of the pipe 46 into the space 44 is adjusted to a predetermined temperature. In other words, the control unit 34 feeds back the measurement result of the temperature of the gas ejected from the opening of the pipe 46 into the space 44 by the temperature measurement unit 47 to control the regulator 31, the cooling unit 32, and the heating unit 33. By feeding back the measurement result of the temperature of the gas ejected from the opening of the pipe 46 into the space 44 to the gas temperature adjustment in the gas supply device 30, the influence of the pipe 46, the gas supply device 30, etc. on the temperature of the gas ejected from the opening of the pipe 46 into the space 44 is reduced.

[0045] The gas supply device 30 does not need to include either the cooling unit 32 or the heating unit 33, as long as it can control the temperature of the gas ejected from the opening of the pipe 46 into the space 44 to a predetermined temperature. In other words, the gas supply device 30 may control the temperature of the gas ejected from the opening of the pipe 46 into the space 44 to a predetermined temperature only by heating the gas with the heating unit 33. The gas supply device 30 may also control the temperature of the gas ejected from the opening of the pipe 46 into the space 44 to a predetermined temperature only by cooling the gas with the cooling unit 32. The gas supply device 30 does not need to include the regulator 31, as long as it can maintain the temperature of the gas ejected from the opening of the pipe 46 into the space 44 at a predetermined temperature regardless of the gas flow rate.

[0046] <Case 70> The color measurement system 1 may further include a housing 70. The housing 70 may be configured to support the color measurement device 10 and the temperature control device 20. The housing 70 may be configured to allow the color measurement device 10 to be detachably attached thereto.

[0047] (Example of operation of color measurement system 1) As described above, the color measurement system 1 includes a color measurement device 10 that measures the visible light reflectance spectrum of the object surface 81 of the object 80, and a temperature control device 20 that maintains the temperature of the object surface 81 of the object 80 at a predetermined temperature. In the color measurement system 1, the temperature control device 20 controls and stabilizes the temperature of the object surface 81 of the object 80 placed on the holder 40 in order to stabilize the measurement results of the visible light reflectance spectrum of the object surface 81 of the object 80 by the color measurement device 10. The temperature control device 20 controls the temperature of the object surface 81 of the object 80 so that the temperature is stabilized at the predetermined temperature. The color measurement device 10 measures the visible light reflectance spectrum of the object surface 81 of the object 80 placed on the holder 40 while the temperature of the object surface 81 is stabilized at the predetermined temperature.

[0048] Specifically, the temperature control device 20 controls the temperature of the target surface 81 to a predetermined temperature by supplying gas, the temperature of which has been controlled to a predetermined temperature, from the gas supply device 30 and spraying the gas onto the target surface 81 of the measurement target 80 placed on the holder 40. The holder 40 has a mounting unit 41 as a mechanism for holding the measurement target 80 so that the temperature of the target surface 81 is maintained at the predetermined temperature, and a pipe 46 as a mechanism for spraying gas at the predetermined temperature onto the target surface 81. The holder 40 also has a temperature measurement unit 47 located near the opening of the pipe 46, which measures the temperature of the gas sprayed onto the target surface 81 from the opening of the pipe 46 and outputs the measurement result to the gas supply device 30. The gas supply device 30 can control the flow rate and temperature of the gas using a regulator 31, a cooling unit 32, and a heating unit 33. The control unit 34 of the gas supply device 30 controls the regulator 31, the cooling unit 32, and the heating unit 33 so that the gas temperature becomes a predetermined temperature, based on the gas temperature measurement result obtained from the temperature measurement unit 47. In other words, the control unit 34 feeds back the gas temperature measurement result to the control of the regulator 31, the cooling unit 32, and the heating unit 33.

[0049] The holder 40 has a structure in which the gas sprayed onto the target surface 81 flows along the target surface 81 and uniformly contacts each part of the target surface 81, and the gas sprayed onto the center of the target surface 81 flows evenly toward the periphery of the target surface 81 and flows out from the space 44. Specifically, the holder 40 has a protrusion 43 on the mounting portion 41 configured to allow the measurement object 80 to be placed thereon. The protrusion 43 forms a gap between the target surface 81 of the measurement object 80 and the surface of the mounting portion 41. The gas sprayed onto the target surface 81 flows toward the periphery of the target surface 81 through the gap between the target surface 81 and the surface of the mounting portion 41 and flows out from the space 44.

[0050] If there is no gap between the object surface 81 and the surface of the mounting portion 41, gas will flow out of the positively pressurized space 44, causing the measurement object 80 to move irregularly from the mounting portion 41. Irregular movement of the measurement object 80 will result in uneven gas flow. In this embodiment, a gap is created between the object surface 81 and the surface of the mounting portion 41, ensuring a path for gas to flow out of the space 44. Ensuring a path for gas to flow out ensures a uniform gas flow. The gas uniformly contacts each part of the object surface 81, maintaining the temperature of each part of the object surface 81 at a predetermined temperature. Furthermore, as the gas flows along the object surface 81, the flow of gas blocks radiation from the color measurement device 10, which faces the object surface 81 across the space 44. The reduced influence of radiation from the color measurement device 10 stabilizes the temperature of the object surface 81.

[0051] <Replacing the color measuring device 10> If the color measurement device 10 is configured to be detachable from the holder 40 or the housing 70, calibration of each of the multiple color measurement devices 10 can be easily performed simply by replacing the color measurement device 10. If the entire color measurement system 1 is installed in a temperature-controlled environment such as a measurement room, it is necessary to wait for the environmental temperature or the temperature of the color measurement device 10 to stabilize before performing calibration each time the color measurement device 10 is replaced. On the other hand, the color measurement system 1 according to this embodiment reduces the influence of the environmental temperature or the temperature of the color measurement device 10 on the target surface 81 of the measurement target 80. By reducing the influence of temperature, the time required to wait for the temperature to stabilize when the color measurement device 10 is replaced can be shortened. As a result, calibration of each of the multiple color measurement devices 10 can be easily performed.

[0052] Furthermore, the color measurement device 10 may be configured to be detachable while a calibration sample of the color measurement device 10 remains placed on the holder 40 as the measurement object 80. In this case, the color measurement device 10 is replaced while the temperature of the target surface 81 of the measurement object 80 remains stable. As a result, the time required to wait for the temperature to stabilize when the color measurement device 10 is replaced is further reduced. As a result, calibration of each of multiple color measurement devices 10 can be easily performed.

[0053] The holder 40 may further include an insulating member that covers the surface opposite the target surface 81 when the measurement object 80 is placed on the mounting portion 41. The insulating member may be configured to be attachable to and detachable from the holder 40 when the measurement object 80 is placed on the mounting portion 41. In other words, the holder 40 may be configured to allow the insulating member to be installed so as to sandwich the measurement object 80 together with the mounting portion 41 when the measurement object 80 is placed on the mounting portion 41. Covering the surface opposite the target surface 81 with the insulating member reduces the influence of heat radiated from the target surface 81 to the surface opposite the target surface 81 through the interior of the measurement object 80, or the influence of heat conducted from the surface opposite the target surface 81 to the target surface 81 through the interior of the measurement object 80. Therefore, when the measurement object 80 is placed on the holder 40 for a long period of time, energy efficiency for controlling the target surface 81 of the measurement object 80 at a predetermined temperature is improved.

[0054] (summary) As described above, in the color measurement system 1 according to this embodiment, the temperature control device 20 can uniformly control the temperature of the object surface 81 of the measurement object 80, which is the measurement target of the color measurement device 10. As a result, the temperature of the object surface 81 can be controlled to a desired temperature. Furthermore, the temperature control device 20 can achieve uniform temperature control of the object surface 81 without installing the entire color measurement system 1 in an environment with a uniform temperature. Furthermore, the temperature control device 20 can reduce the influence of radiation from the color measurement device 10 to the object surface 81 of the measurement object 80 by supplying temperature-controlled gas to the space 44 between the measurement object 80 and the color measurement device 10. As a result, the temperature control device 20 can stabilize the temperature of the object surface 81 of the measurement object 80 with a simple configuration. Furthermore, the color measurement device 10 can stably measure the visible light reflectance spectrum of the object surface 81 of the measurement object 80 without being affected by temperature changes of the object surface 81 of the measurement object 80. In other words, the accuracy of measurement of the visible light reflectance spectrum of the object surface 81 by the color measurement device 10 is improved.

[0055] The above describes an embodiment of the present disclosure with reference to the drawings, but the specific configuration is not limited to this embodiment, and various modifications are also included within the scope that does not deviate from the spirit of the present disclosure.

[0056] In this disclosure, the X-axis, Y-axis, and Z-axis are provided for convenience of explanation and may be interchanged. The configurations according to this disclosure have been described using a Cartesian coordinate system formed by the X-axis, Y-axis, and Z-axis. The positional relationship between the components according to this disclosure is not limited to an orthogonal relationship. [Explanation of symbols]

[0057] 1 Color Measurement System 10 Color measuring device (11: irradiation unit: 12: detection unit, 13: control unit) 20 Temperature control device 30 gas control device (31: regulator, 32: cooling unit, 33: heating unit, 34: control unit) 40 holder (41: mounting portion, 42: edge portion, 43: protrusion, 44: space, 45: side wall, 46: piping, 47: temperature measurement portion, 48: inflow gas, 49: outflow gas) 70 Case 80 Measurement object (81: target surface)

Claims

1. a holder having a mounting portion configured to be able to mount a measurement object having a target surface whose color characteristics are to be measured by a color measurement device, and a piping for supplying gas to be sprayed onto the target surface; a gas supply device that supplies the gas by controlling the temperature of the gas; Equipped with the mounting portion has a side wall that partitions a space located between the object surface and the color measurement device together with the object surface and the color measurement device, and has a protrusion that supports the measurement object so that the measurement object is spaced a predetermined distance from the mounting portion; one end of the pipe is positioned on the side wall so that the gas is ejected toward the target surface in the space; Temperature control device.

2. A temperature control device as described in claim 1, wherein the holder has a structure in which gas sprayed onto the center of the target surface flows toward the periphery of the target surface and escapes from the space.

3. The temperature control device according to claim 1 or 2, wherein the holder is configured to allow the color measuring device to be detachably attached thereto.

4. The temperature control device according to claim 1 or 2, wherein the holder is configured so that a heat insulating member can be installed on the holder so as to cover a surface opposite to the object surface when the object is placed on the placement portion.

5. 3. A color measurement system comprising: the temperature control device according to claim 1; and a color measurement device that measures color characteristics of a surface of a measurement object whose temperature has been controlled by the temperature control device.

Images