Color measurement system, backing plate, color measurement device

Abstract

To solve the problem that reducing the size of a backing member in consideration of portability results in the backing member having area smaller than that of a color measurement target, which makes it difficult to locate the position of the backing member and may cause a measurement position to be out of the backing member.SOLUTION: A colorimetric system is provided, comprising a colorimetric device for measuring the color of a color measurement target, a backing plate to be placed below the color measurement target, and alignment means for aligning the backing plate with the colorimetric device while the backing plate is placed below the color measurement target and the entire backing plate is covered with the color measurement target.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a color measurement system including a color measurement device and a backing plate, and also to a backing plate used for color measurement and a color measurement device. [Background technology]

[0002] In color measurement using a colorimetric device, if the object to be measured is thin and highly transparent, such as a sheet material, the measured value may be affected by the background color, making it difficult to obtain an accurate measurement. To avoid this problem, as shown in Patent Document 1, a backing member has traditionally been placed under the object to be measured. The color of the backing member is either white or black, and its performance is specified in the international standard ISO 13655. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2013-205067 Summary of the Invention [Problem to be solved by the invention]

[0004] In situations where a portable color measurement device is used, miniaturization of the backing member is also required for portability. However, if the area of ​​the backing member becomes smaller than the area of ​​the object to be measured by miniaturizing the backing member, the entire backing member will be hidden below the object to be measured, making it difficult to determine the position of the backing member, and there is a risk that the color measurement position will deviate from the backing member. [Means for solving the problem]

[0005] In order to solve the above problem, the backing plate of the present invention is a backing plate that is placed under a color measurement object to be measured by a color measurement device, and is characterized by having an emitting portion that can emit light toward the color measurement object.

[0006] The backing plate of the present invention is a backing plate that is placed under an object to be measured by a color measurement device, and is characterized by having a magnet at a position facing the color measurement device.

[0007] The colorimetry system of the present invention is characterized by comprising a colorimetry device that measures the color of an object to be measured, a backing plate that is placed under the object to be measured, and an alignment means for aligning the backing plate with the colorimetry device when the backing plate is placed under the object to be measured and the entire backing plate is covered by the object to be measured.

[0008] The colorimetric device of the present invention is a colorimetric device that measures the color of an object to be measured, and is characterized in that it has a power transmission coil positioned facing a backing plate placed below the object to be measured, and the power transmission coil supplies power to a light-emitting unit provided on the backing plate via a power receiving coil provided on the backing plate.

[0009] The color measurement device of the present invention is further characterized in that it includes a device-side magnet positioned facing a backing plate placed below the object to be measured, and the device-side magnet faces the backing plate with a polarity opposite to the polarity of the plate-side magnet provided on the backing plate facing the color measurement device.

[0010] The colorimetric device of the present invention is a colorimetric device that measures the color of an object to be measured, and is characterized in that it is provided with a magnetic sensor in a position facing a backing plate that is placed below the object to be measured, and the magnetic sensor is in a position where it can detect a magnet provided on the backing plate. [Brief explanation of the drawings]

[0011] [Figure 1] FIG. [Figure 2] FIG. 2 is a cross-sectional view of the color measurement device cut along the XZ plane at the center position of the opening. [Figure 3] FIG. 1 is a perspective view of a color measurement system, a color measurement device, and a backing plate according to a first embodiment. [Figure 4] FIG. 1 is a perspective view of a color measurement system, a color measurement device, and a backing plate according to a first embodiment. [Figure 5] FIG. 10 is a perspective view of a color measurement system, a color measurement device, and a backing plate according to a second embodiment. [Figure 6] FIG. 10 is a perspective view of a color measurement system, a color measurement device, and a backing plate according to a third embodiment. [Figure 7] FIG. 10 is a perspective view of a color measurement system, a color measurement device, and a backing plate according to a fourth embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0012] The present invention will be briefly described below. The backing plate according to the first aspect is a backing plate that is placed under an object to be measured by a color measurement device, and is characterized by having a light-emitting unit that can emit light toward the object to be measured. According to this aspect, the backing plate placed under the object to be measured by the colorimetric device is equipped with an emitting unit capable of emitting light toward the object to be measured. Therefore, even if the entire backing plate is hidden under the object to be measured, the light emitted from the emitting unit passes through the object to be measured, allowing the backing plate to be aligned with the colorimetric device and colorimetric device to perform appropriate color measurement.

[0013] The second aspect is characterized in that the backing plate described in the first aspect is provided with a receiving coil that obtains power via a transmitting coil provided in the colorimetric device, and the light-emitting unit receives power from the receiving coil and emits light. According to this aspect, the color measurement device is provided with a receiving coil that obtains power via a transmitting coil provided in the color measurement device, and the light-emitting unit receives power from the receiving coil and emits light. This allows the thickness of the backing plate to be made thinner, improving the portability of the backing plate and making color measurement work easier.

[0014] A backing plate according to a third aspect is a backing plate that is placed under an object to be measured by a color measurement device, and is characterized by having a magnet at a position facing the color measurement device. According to this aspect, the backing plate placed under the object to be measured by the colorimetric device is provided with a magnet in a position facing the colorimetric device. Therefore, even if the entire backing plate is hidden under the object to be measured, the magnet can be used to align the backing plate with the colorimetric device, allowing for appropriate color measurement.

[0015] A fourth aspect is the third aspect, wherein the magnet faces the color measurement device with a polarity opposite to a polarity of the magnet provided in the color measurement device that faces the backing plate. According to this aspect, the magnet faces the colorimetric device with the polarity opposite to the polarity of the magnet provided in the colorimetric device facing the backing plate, so that the adhesive force between the magnet on the backing plate side and the magnet on the colorimetric device side can reliably align the backing plate and the colorimetric device.

[0016] The color measurement system according to the fifth aspect is characterized by comprising a color measurement device that measures the color of an object to be measured, a backing plate that is placed under the object to be measured, and an alignment means for aligning the backing plate with the color measurement device when the backing plate is placed under the object to be measured and the entire backing plate is covered by the object to be measured. According to this aspect, the color measurement system is equipped with an alignment means for aligning the backing plate with the color measurement device, so that color measurement can be performed appropriately even if the entire backing plate is hidden below the object to be measured.

[0017] The sixth aspect is characterized in that, in the fifth aspect, the alignment means is an illuminating unit provided on the backing plate, and is configured as an illuminating unit capable of emitting light toward the object to be measured. According to this aspect, the alignment means is an emitting unit provided on the backing plate and is composed of an emitting unit capable of emitting light toward the object to be measured. Therefore, even if the entire backing plate is hidden below the object to be measured, the light emitted from the emitting unit passes through the object to be measured, thereby allowing the backing plate to be aligned with the color measurement device and color measurement to be performed appropriately.

[0018] The seventh aspect is characterized in that, in the sixth aspect, the color measurement device is provided with a transmitting coil, the backing plate is provided with a receiving coil that receives power via the transmitting coil, and the light-emitting unit receives power from the receiving coil and emits light. According to this aspect, the color measurement device is equipped with a power transmission coil, the backing plate is equipped with a power receiving coil that obtains power via the power transmission coil, and the light emitting unit receives power from the power receiving coil and emits light. Therefore, the thickness of the backing plate can be made thinner, which improves the portability of the backing plate and also makes color measurement work easier.

[0019] The eighth aspect is characterized in that, in the fifth aspect, the alignment means comprises a device-side magnet arranged in a position facing the backing plate on the color measurement device, and a plate-side magnet arranged in a position facing the color measurement device on the backing plate, and the device-side magnet and the plate-side magnet are capable of facing each other and have opposite polarities facing each other.

[0020] According to this aspect, the alignment means comprises the device-side magnet provided on the color measurement device and the plate-side magnet provided on the backing plate, and since the two magnets can face each other and have opposite polarities, the adhesive force between the device-side magnet and the plate-side magnet can reliably align the backing plate and the color measurement device.

[0021] The ninth aspect is characterized in that, in the fifth aspect, the alignment means comprises a magnet provided on the backing plate at a position facing the color measurement device, and a magnetic sensor provided on the color measurement device for detecting the magnetism of the magnet. According to this aspect, the alignment means comprises a magnet provided on the backing plate at a position facing the color measurement device, and a magnetic sensor provided on the color measurement device for detecting the magnetism of the magnet. Therefore, even if the entire backing plate is hidden below the object to be measured, the magnetic sensor can detect the magnetism of the magnet to align the backing plate with the color measurement device, allowing appropriate color measurement to be performed.

[0022] The tenth aspect is characterized in that, in the ninth aspect, the alignment means comprises multiple pairs of the magnet and the magnetic sensor, the colorimetric device comprises a display unit that displays information, and a control unit that controls the display unit causes the display unit to display that fact when all of the magnetic sensors detect the opposing magnet.

[0023] According to this aspect, the alignment means includes multiple pairs of magnets and magnetic sensors, the colorimetric device includes a display unit that displays information, and a control unit that controls the display unit causes the display unit to display an indication that all of the magnetic sensors detect the opposing magnet, thereby allowing the user to easily understand that the backing plate and the colorimetric device are aligned, improving usability.

[0024] The color measuring device of the 11th aspect is a color measuring device that measures the color of an object to be measured, and is characterized in that it has a power transmitting coil positioned facing a backing plate placed below the object to be measured, and the power transmitting coil supplies power to a light emitting unit provided on the backing plate via a power receiving coil provided on the backing plate.

[0025] According to this aspect, the power transmission coil provided in the color measurement device supplies power to the light emitting unit provided in the backing plate via the power receiving coil provided in the backing plate, so that the light emitted from the light emitting unit passes through the object to be measured, thereby enabling alignment between the backing plate and the color measurement device and enabling appropriate color measurement. Furthermore, the thickness of the backing plate can be reduced, which improves portability of the backing plate and also facilitates color measurement operations.

[0026] A color measurement device according to a twelfth aspect is a color measurement device for measuring the color of an object to be measured, and is characterized in that it is provided with a device-side magnet positioned facing a backing plate placed below the object to be measured, and the device-side magnet faces the backing plate with a polarity opposite to the polarity of the plate-side magnet provided on the backing plate facing the color measurement device.

[0027] According to this aspect, the backing plate and the color measurement device can be reliably aligned by the attraction force between the backing plate side magnet and the color measurement device magnet.

[0028] The color measuring device according to the thirteenth aspect is a color measuring device for measuring the color of an object to be measured, characterized in that it is provided with a magnetic sensor positioned facing a backing plate placed below the object to be measured, and is positioned so that the magnetic sensor can detect a magnet provided on the backing plate.

[0029] According to this aspect, even if the entire backing plate is hidden below the object to be measured, the magnetic sensor can detect the magnetism of the magnet, thereby aligning the backing plate with the color measurement device and performing appropriate color measurement.

[0030] The present invention will be specifically described below. The XYZ coordinate system shown in each drawing is a Cartesian coordinate system, with the XY plane being the horizontal plane and the YZ and XZ planes being the vertical planes. The Z-axis direction is a vertical direction that intersects with the top surface 2c and the bottom surface 2a of the color measuring device 1A, and is parallel to the optical axis CL, which will be described later. The Y-axis direction is the longitudinal direction of the color measurement device 1A when viewed from the Z-axis direction, and the X-axis direction is the lateral direction of the color measurement device 1A when viewed from the Z-axis direction. In this specification, the configuration of the color measurement device 1A will be described assuming that the device is placed on a color measurement object Pb that forms a surface parallel to a horizontal plane, and that the longitudinal direction of the color measurement device 1A is along the Y-axis direction.

[0031] 1 and 2, a color measurement device 1A has a configuration for measuring color based on light Mb arriving from an object Pb to be measured. The color measurement device 1A includes an internal device unit 3 inside a housing 2 that forms the outer shell of the device. In other words, the internal device unit 3 is covered by the housing 2. The length of the housing 2 in the Y-axis direction is longer than the length of the housing 2 in the X-axis direction. A user of the device holds and uses the device with the side of the device in the -Y direction facing forward. The internal device unit 3 includes an incident light processing section 4 that processes light Mb that has entered the device. A detailed description of the incident light processing section 4 will be omitted, but in this embodiment, the incident light processing section 4 includes an optical filter (not shown).

[0032] This optical filter selectively transmits a desired wavelength component from the light Mb incident inside the device. The light that passes through this optical filter is incident on a light-receiving element (not shown), specifically a photodiode. The intensity of the incident light is then converted into a voltage value and output to a control unit (not shown). The colorimetric device 1A measures the spectrum of the object Pb to be measured by repeatedly selecting wavelengths using the optical filter and acquiring the intensity of received light. In this embodiment, the optical filter is a wavelength-tunable Fabry-Perot etalon, which is a wavelength filter that utilizes multiple interference between two opposing reflecting surfaces. Of course, the incident light processing unit 4 is not limited to a configuration that includes such an optical filter. The wavelength-tunable Fabry-Perot etalon is configured to select a wavelength by controlling the distance in the Z-axis direction between a pair of mirrors (not shown) that are arranged facing each other with a gap in the Z-axis direction.

[0033] An opening 2b is formed in the bottom surface 2a of the device, and light Mb traveling from the object Pb to be measured toward the incident light processing section 4 enters the device through the opening 2b. The opening 2b is a circular opening centered on an optical axis CL. The optical axis CL is the optical axis of light Mb traveling from the object Pb to be measured toward the incident light processing section 4.

[0034] The internal unit 3 includes a light-emitting unit 5 inside the opening 2b. Light Ma emitted from the light-emitting unit 5 travels through the opening 2b toward the outside of the device and irradiates the object Pb under color measurement facing the bottom surface 2a. The internal device unit 3 also includes a colorimetry battery 6, which is the power supply source for the device, and power is supplied from this colorimetry battery 6 to the incident light processing unit 4, light emitting unit 5, etc. via a voltage adjustment circuit (not shown). In FIG. 2, reference numeral 9 denotes a control unit that performs various controls of the color measurement device 1A.

[0035] [First embodiment] Next, a colorimetry system 100A, a colorimetry device 1A, and a backing plate 50A according to the first embodiment will be described with reference to Figures 3 and 4. The colorimetry system 100A includes a colorimetry device 1A that measures the color of a colorimetry object Pb, and a backing plate 50A that is placed below the colorimetry object Pb. The symbol Pa denotes a mounting surface on which the colorimetry object Pb and the backing plate 50A are placed. Fig. 3 shows a state in which a backing plate 50A is placed on a placement surface Pa, and a sheet-like object Pb to be measured for colorimetry and the colorimetry device 1A are about to be placed on top of it. Fig. 4 shows a state in which a backing plate 50A is placed on a placement surface Pa, and a object Pb to be measured for colorimetry is placed on top of it, and the colorimetry device 1A is about to be placed on top of it.

[0036] The upper surface of the backing plate 50A is, for example, a white backing surface that conforms to the international standard ISO 13655, and the color measurement device 1A measures the color of the sheet-like object Pb when the backing plate 50A is placed under the object Pb. This also applies to the other embodiments described below. The backing plate 50A is provided with an alignment means for aligning the backing plate 50A with the colorimetric device 1A when the entire backing plate 50A is covered with the colorimetric object Pb. This also applies to the other embodiments described below. In this embodiment, the positioning means is configured by a light emitting unit 51 .

[0037] A light-emitting battery 53 is provided inside the backing plate 50A, and the light-emitting unit 51 emits light using power supplied from the light-emitting battery 53. The light-emitting unit 51 can be turned on and off using a switch 52. Both the light-emitting unit 51 and the switch 52 are provided so as not to protrude from the top surface of the backing plate 50A. In this embodiment, the light-emitting battery 53 is a secondary battery that can be used repeatedly by charging, and can be charged by obtaining power from an external device or external power source via a connector (not shown) provided on the backing plate 50 A. The light-emitting battery 53 may be configured to be charged by providing a solar panel (not shown) on the backing plate 50 A.

[0038] 3 and 4, the area of ​​the backing plate 50A in the XY plane is smaller than the area of ​​the object of color measurement Pb, and the entire backing plate 50A may be hidden under the object of color measurement Pb, as shown in Fig. 4. In this state, it is difficult to determine the position of the backing plate 50A, and there is a risk that the opening 2b of the colorimetric device 1A, i.e., the colorimetric position, may deviate from the backing plate 50A. However, as shown in Fig. 4, the light emitted from the light-emitting unit 51 passes through the object of color measurement Pb, making it possible to determine the position of the backing plate 50A, align the backing plate 50 with the colorimetric device 1, and perform appropriate color measurement.

[0039] In this embodiment, the light-emitting portions 51 are provided at the four corners of the backing plate 50A, but this is not limiting and it is sufficient that at least one light-emitting portion 51 is provided. However, providing a plurality of light-emitting portions 51 makes it even easier to grasp the position of the backing plate 50A. In particular, providing the light-emitting portions 51 at the four corners of the backing plate 50A as in this embodiment makes it easier to grasp the position of the entire backing plate 50A. The light emitting unit 51 can be configured, for example, by a white LED.

[0040] [Second embodiment] Next, a second embodiment of the color measurement system, color measurement device, and backing plate will be described with reference to Fig. 5. In each embodiment described below, the same components as those in the previously described embodiment are assigned the same reference numerals, and redundant description will be omitted. In each embodiment described below, the placement surface Pa and the color measurement target Pb shown in Figs. 3 and 4 will be omitted. FIG. 5 shows a color measurement system 100B, a color measurement device 1B, and a backing plate 50B according to the second embodiment.

[0041] The backing plate 50B includes a power receiving coil 54 that receives power from the colorimetric device 1B via the power transmitting coil 12 provided in the colorimetric device 1B. That is, the power transmitting coil 12 and the power receiving coil 54 form a wireless power feeding system. The light emitting unit 51 receives power from the power receiving coil 54 and emits light. The color measurement device 1B has a power transmission coil 12 positioned facing a backing plate 50B placed below the color measurement object Pb, and the power transmission coil 12 supplies power to a light-emitting unit 51 provided on the backing plate 50B via a power receiving coil 54 provided on the backing plate 50B. The color measurement system 100B includes the color measurement device 1B configured as described above and a backing plate 50B. With this configuration, the thickness of the backing plate 50 can be made thinner than with a configuration including a battery, improving the portability of the backing plate 50B and facilitating the color measurement operation.

[0042] [Third embodiment] Next, a third embodiment of a color measurement system, a color measurement device, and a backing plate will be described with reference to Fig. 6. Fig. 6 shows a color measurement system 100C, a color measurement device 1C, and a backing plate 50C according to the third embodiment.

[0043] The backing plate 50C has a permanent magnet at a position facing the color measurement device 1C. Hereinafter, the permanent magnet is an example of a magnet. Reference numeral 62 denotes a plate-side first permanent magnet, and reference numeral 63 denotes a plate-side second permanent magnet. In contrast to this, in the color measurement device 1C, a permanent magnet is also provided at a position facing the backing plate 50C. Reference numeral 60 denotes a device-side first permanent magnet, and reference numeral 61 denotes a device-side second permanent magnet. The color measurement system 100C includes the above-described color measurement device 1C and a backing plate 50C. The plate-side first permanent magnet 62, the plate-side second permanent magnet 63, the device-side first permanent magnet 60, and the device-side second permanent magnet 61 constitute an alignment means 59A for aligning the color measurement device 1C with the backing plate 50C.

[0044] The distance in the XY plane between the plate-side first permanent magnet 62 and the plate-side second permanent magnet 63 is equal to the distance in the XY plane between the device-side first permanent magnet 60 and the device-side second permanent magnet 61. This allows the plate-side second permanent magnet 63 to face the device-side second permanent magnet 61 while the plate-side first permanent magnet 62 and the device-side first permanent magnet 60 face each other.

[0045] The plate-side first permanent magnet 62 and the device-side first permanent magnet 60 have opposite polarities facing each other; for example, the plate-side first permanent magnet 62 has its south pole facing the colorimetric device 1C, and the device-side first permanent magnet 60 has its north pole facing the backing plate 50C. Similarly, the second permanent magnet 63 on the plate side and the second permanent magnet 61 on the device side also have opposite polarities facing each other; for example, the north pole of the second permanent magnet 63 on the plate side faces the colorimetric device 1C, and the south pole of the second permanent magnet 61 on the device side faces the backing plate 50C.

[0046] With the above configuration, an adhesive force is obtained between the plate-side first permanent magnet 62 and the device-side first permanent magnet 60, and an adhesive force is obtained between the plate-side second permanent magnet 63 and the device-side second permanent magnet 61, so that the backing plate 50C and the colorimetric device 1C can be aligned and colorimetric measurement can be performed appropriately.

[0047] In the above embodiment, as an example, the south pole of the first permanent magnet 62 on the plate side faces the north pole of the first permanent magnet 60 on the device side, and the north pole of the second permanent magnet 63 on the plate side faces the south pole of the second permanent magnet 61 on the device side, but it goes without saying that this is not limited to this. Furthermore, in the above embodiment, the polarities of the device-side first permanent magnet 60 and the device-side second permanent magnet 61 facing the backing plate 50C are different, and the polarities of the plate-side first permanent magnet 62 and the plate-side second permanent magnet 63 facing the colorimetric device 1C are different. As a result, for example, when the colorimetric device 1C is rotated 180° in the XY plane from the state shown in FIG. 6, the permanent magnets of the colorimetric device 1C and the permanent magnets of the backing plate 50C face each other with the same polarity, and are not attracted to each other. With this configuration, the orientation of the colorimetric device 1C with respect to the backing plate 50C is fixed, and the opening 2b, which is the colorimetric position, can be reliably faced to the backing plate 50C.

[0048] However, the polarity of the device-side first permanent magnet 60 and the device-side second permanent magnet 61 facing the backing plate 50C may be the same, and the polarity of the plate-side first permanent magnet 62 and the plate-side second permanent magnet 63 facing the colorimetric device 1C may be the same. In this case, it is preferable to configure the colorimetric device 1C so that the opening 2b does not come off the backing plate 50C even when the colorimetric device 1C is rotated 180° on the XY plane from the state in FIG. 6 .

[0049] In the above embodiment, the device-side first permanent magnet 60 and the device-side second permanent magnet 61 are arranged diagonally at the corners of the bottom surface of the device, but it goes without saying that this is not limited to this, and they may be arranged, for example, along the periphery of the opening 2b. In the above embodiment, two permanent magnets are provided for each of the color measurement device 1C and the backing plate 50C, but this is not limited to this, and one permanent magnet, or three or more permanent magnets may be provided for each of the color measurement device 1C and the backing plate 50C. Furthermore, in the above embodiment, permanent magnets are provided for each of the color measurement device 1C and the backing plate 50C, but a permanent magnet may be provided for one and a metal member may be provided for the other.

[0050] In the above embodiment, electromagnets may be used instead of the device-side first permanent magnet 60 and the device-side second permanent magnet 61. The electromagnets are normally de-energized and are energized when aligning the colorimetry device 1C with the backing plate 50C. The electromagnets may be switched from a de-energized state to a powered state using a dedicated switch, or may be switched from a de-energized state to a powered state by turning on the power of the device. This configuration prevents the magnets on the colorimetry device and the backing plate from accidentally attracting each other, making it easier to align them. Alternatively, the magnets on the backing plate may be electromagnets, and the electromagnets may be energized by receiving power from the wireless power supply system described above.

[0051] [Fourth embodiment] Next, a fourth embodiment of a color measurement system, a color measurement device, and a backing plate will be described with reference to Fig. 7. Fig. 7 shows a color measurement system 100D, a color measurement device 1D, and a backing plate 50D according to the fourth embodiment.

[0052] Similar to the backing plate 50C according to the third embodiment, the backing plate 50D according to the present embodiment includes a plate-side first permanent magnet 62 and a plate-side second permanent magnet 63. As an example, the plate-side first permanent magnet 62 is disposed so that its south pole faces the colorimetric device 1D, and as an example, the plate-side second permanent magnet 63 is disposed so that its north pole faces the colorimetric device 1D. The color measuring device 1D has a first magnetic sensor 65 at a position facing the backing plate 50D where it can detect the first plate-side permanent magnet 62, and a second magnetic sensor 66 at a position where it can detect the second plate-side permanent magnet 63. The color measurement system 100D includes the above-described color measurement device 1D and a backing plate 50D. The plate-side first permanent magnet 62, the plate-side second permanent magnet 63, the first magnetic sensor 65, and the second magnetic sensor 66 constitute a positioning means 59B for aligning the color measurement device 1D with the backing plate 50D.

[0053] According to the above configuration, by detecting the first permanent magnet 62 on the plate side using the first magnetic sensor 65 and detecting the second permanent magnet 63 on the plate side using the second magnetic sensor 66, it is possible to align the backing plate 50D with the colorimetric device 1D, and to perform appropriate colorimetry.

[0054] In addition, in this embodiment, as described above, multiple pairs of permanent magnets and magnetic sensors are provided, and when all of the magnetic sensors (first magnetic sensor 65 and second magnetic sensor 66) detect the opposing permanent magnets (plate-side first permanent magnet 62 and plate-side second permanent magnet 63), the control unit 9 (see Figure 2) of the colorimetric device 1D displays this on the display unit 8. This allows the user to easily understand that the positions of the backing plate 50D and the colorimetric device 1D are aligned, improving usability. The display on the display unit 8 may be a message such as "The position with the backing plate is aligned." Alternatively, or in addition to the display on the display unit 8, a beep may be emitted, for example.

[0055] In the above embodiment, two pairs of permanent magnets and magnetic sensors are provided, but the number is not limited to this and may be one, or three or more. Furthermore, either the south pole or the north pole of the plate-side first permanent magnet 62 and the plate-side second permanent magnet 63 may face the colorimetric device 1D. However, if one of the plate-side first permanent magnet 62 and the plate-side second permanent magnet 63 is arranged so that its south pole faces the colorimetric device 1D and the other is arranged so that its north pole faces the colorimetric device 1D, the orientation of the colorimetric device 1D can be regulated by detecting the difference in polarity.

[0056] The present invention is not limited to the embodiments described above, and various modifications are possible within the scope of the invention described in the claims, and it goes without saying that these modifications are also included in the scope of the present invention. [Explanation of symbols]

[0057] DESCRIPTION OF SYMBOLS 1A, 1B, 1C, 1D...colorimetry device, 2...housing, 2a...bottom surface, 2b...opening, 2c...top surface, 3...internal unit of device, 4...incident light processing section, 5...light emitting section, 6...colorimetry battery, 7...operation section, 8...display section, 9...control section, 12...power transmitting coil, 50A, 50B, 50C, 50D...backing plate, 51...light emitting section, 52...switch, 53...light emitting battery, 54...power receiving coil, 59A, 59B...alignment means, 60...device-side first permanent magnet, 61...device-side second permanent magnet, 62...plate-side first permanent magnet, 63...plate-side second permanent magnet, 65...first magnetic sensor, 66...second magnetic sensor, 100A, 100B, 100C, 100D...colorimetry system, Pa...mounting surface, Pb...object to be measured

Claims

1. A backing plate to be placed under a color measurement target to be measured by a color measurement device, a light emitting unit capable of emitting light toward the object to be measured; a power receiving coil that receives power via a power transmitting coil provided in the color measuring device, The light emitting unit emits light upon receiving power from the power receiving coil. A backing plate characterized by:

2. A colorimetric device for measuring the color of an object to be measured, a power transmission coil provided at a position facing a backing plate placed under the object to be measured; The power transmitting coil supplies power to a light emitting unit provided on the backing plate via a power receiving coil provided on the backing plate. A color measuring device characterized by:

3. A colorimetric device for measuring the color of an object to be measured; a backing plate disposed under the object to be measured, the color measurement device includes a power transmission coil, the backing plate includes a light-emitting unit capable of emitting light toward the object to be measured, and a power-receiving coil that receives power via the power-transmitting coil; The light emitting unit emits light upon receiving power from the power receiving coil. Color measurement system.

Images