Optical characteristic measurement device

Abstract

An optical characteristic measurement device (1) comprises: a device body (2); a device placing table (3) that detachably accommodates the device body (2); and a calibration unit (4) that has a calibration member (42) for use in calibration of the device body (2). In the device body (2), a first holding part (24) for holding the calibration unit (4) on the device body (2) in a removable manner in a state where the calibration member (42) faces a measurement opening (23) of the device body (2) is formed. In the device placing table (3), a second holding part (34) for holding the calibration unit (4) in a removable manner when the calibration unit (4) is not held by the device body (2) is formed.

Description

Optical property measuring device

[0001] The present invention relates to an optical characteristic measuring device, such as a colorimeter, that includes a device main body and a device stand for detachably accommodating the device main body.

[0002] When an optical property measuring device such as a colorimeter is used, it is common to perform a calibration, such as a white calibration, to calibrate the colorimetric values ​​and then calibrate the colorimetric values ​​based on this calibration.

[0003] Patent Literature 1 discloses an optical property measuring device that includes a device main body and a device stand that detachably houses the device main body, and in which a white calibration unit is provided integrally with the device stand. With this optical property measuring device, white calibration can be performed using the white calibration unit of the device stand.

[0004] U.S. Pat. No. 1,106,0966

[0005] However, in the optical characteristic measuring device described in Patent Document 1, the white calibration unit is provided integrally with the device stand, which poses the following problems.

[0006] That is, when carrying a portable handheld device housed in a device stand to a measurement location to perform white calibration, it was necessary to bring along the large device stand as well, which resulted in a problem of poor usability.

[0007] An object of the present invention is to provide an optical characteristic measuring apparatus that is easy to use and does not require an apparatus stand when the apparatus main body is carried to a measurement location for calibration.

[0008] The above object is achieved by the following means: (1) An optical characteristic measuring device comprising: an apparatus main body; an apparatus stand for detachably accommodating the apparatus main body; and a calibration unit having a calibration member used to calibrate the apparatus main body, wherein the apparatus main body is formed with a first holding portion for detachably holding the calibration unit to the apparatus main body with the calibration member facing a measurement opening of the apparatus main body, and the apparatus stand is formed with a second holding portion for detachably holding the calibration unit when the calibration unit is not held by the apparatus main body. (2) The optical characteristic measuring device according to paragraph 1, wherein the first holding portion of the apparatus main body and the second holding portion of the apparatus stand are formed with the same shape. (3) The optical characteristic measuring device according to paragraph 1 or 2, wherein when the calibration unit is held in the second holding portion of the apparatus stand, a portion of the calibration unit protrudes from the apparatus stand. (4) The optical characteristic measuring device according to paragraph 1 or 2, wherein the second holding portion of the apparatus stand holds the calibration unit with the calibration member facing the interior of the apparatus stand. (5) The optical property measuring device according to the preceding paragraph 1 or 2, wherein the calibration unit displays identification information of the calibration unit in a position that is visible when the calibration unit is held in the first holding section of the device body and the second holding section of the device stand. (6) The optical property measuring device according to the preceding paragraph 1 or 2, wherein the device body and the device stand are formed with a recess or protrusion unique to each optical property measuring device, the calibration unit is formed with a convex or recess unique to each optical property measuring device that corresponds to the recess or protrusion, and the calibration unit is held in the first holding section or the second holding section with the concave and convex portions fitted together. (7) The optical property measuring device according to the preceding paragraph 1 or 2, wherein the calibration unit includes an identification information holding section that holds identification information of the calibration unit, and the device body and / or the device stand are provided with a reading section that reads the identification information from the identification information holding section.(8) The optical characteristic measuring device according to the preceding paragraph 7, wherein the device main body and / or the device stand are provided with: a discrimination means for discriminating whether the identification information read by the reading unit matches or does not match the identification information held by the device main body and / or the device stand; and a warning means for outputting a warning when the discrimination means determines that there is a mismatch. (9) The optical characteristic measuring device according to the preceding paragraph 7, wherein when the device main body is provided with the reading unit, the reading unit can be driven by a power source on the device stand side.

[0009] The optical property measuring device according to the present invention includes a device main body, a device stand for detachably accommodating the device main body, and a calibration unit having a calibration member used for calibrating the device main body. The device main body is formed with a first holding portion for detachably holding the calibration unit on the device main body with the calibration member facing the measurement opening of the device main body. The device stand is formed with a second holding portion for detachably holding the calibration unit when the calibration unit is not held on the device main body.

[0010] Therefore, when the device main body is removed from the device stand and taken to, for example, a measurement location, the calibration unit can be removed from the second holder of the device stand and attached to the first holder of the device main body. On the other hand, when the device main body is stored in the device stand, the calibration unit can be removed from the first holder of the device main body and attached to the second holder of the device stand. As a result, when taking the device main body to a measurement location, it is no longer necessary to take the device stand integrated with the calibration unit, improving usability.

[0011] 1 is a front view of an optical characteristic measuring device according to an embodiment of the present invention; FIG. 2 is a perspective view of the same optical characteristic measuring device; FIG. 3 is a perspective view of the device main body; FIG. 4 is a perspective view of the device main body before a calibration unit is attached and held thereon; FIG. 5 is a perspective view of the device stand without the calibration unit attached; FIG. 6 is a perspective view of the device stand with the calibration unit attached and held thereon; FIG. 7 is a perspective view of the calibration unit; FIG. 8 is a cross-sectional view of the main parts of the calibration unit; FIG. 9 is a cross-sectional view of the main parts before the calibration unit is attached to the device main body; FIG. 10 is a partial enlarged view of the calibration unit attached and held thereon; FIG. 11 is a cross-sectional view of the main parts when the calibration unit is removed from the device main body; FIG. 12 is a front view of the calibration unit, showing another embodiment of the present invention; FIG. 13 is a perspective view of the calibration unit, showing yet another embodiment of the present invention; FIG. 14 is a perspective view of the calibration unit, showing yet another embodiment of the present invention; FIG. 15 is a block diagram of a reading circuit built into the device main body or the device stand; FIG. 16 is a flowchart for explaining the operation of the reading circuit; FIG. 17 is a perspective view of a modified device stand; FIG. 18 is a perspective view of another modified device stand.

[0012] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0013] Fig. 1 is a front view of an optical characteristic measuring device 1 according to one embodiment of the present invention, and Fig. 2 is a perspective view of the same. This optical characteristic measuring device 1 comprises an apparatus main body 2, an apparatus stand 3, and a calibration cap 4 as a calibration unit.

[0014] 3 to 5, the device main body 2 has a vertically long body portion 21 and a box-shaped head portion 22 formed integrally with the body portion 21 at the upper end of the body portion 21. The body portion 21 is the part that the user holds in the palm of their hand during measurement. For this reason, the body portion 21 has a circular or nearly circular cross section that is easy for the user to grip, and the upper side has a smaller diameter than the lower side.

[0015] A measurement diameter changeover switch 211 is provided at the bottom of the front side of the body 21, and an operation button 212 is provided at the top. The operation button 212 is pressed by the user when starting measurement or when activating a preview mode for checking the position of the object to be measured.

[0016] The head 22 houses electronic circuit components and the like. A display unit 221 made of a liquid crystal panel or the like and an operation key unit 222 having a plurality of operation keys are formed on the top surface of the head 22. A communication cable connection unit 223 is formed on the front surface of the head 22. A power button 26 is provided on the side of the head 22.

[0017] A downward-opening measurement opening 23 (see FIG. 10) is formed at the bottom end of the body 21. The device body 2 is configured to measure the light irradiated or reflected from the object to be measured by placing the object in front of this measurement opening 23. Also, a first holding portion is formed at the bottom end of the body 21 to removably hold the calibration cap 4. The first holding portion will be described later.

[0018] As shown in FIGS. 6 and 7, the device stand 3 includes an upright back portion 31 and a receiving portion 32 that protrudes forward from the lower portion of the back portion 31.

[0019] A hollow storage section 321 with its depth extending vertically is formed in the center of the top surface of the receiving section 32. The storage section 321 serves to fit and store the body 21 of the device body 2 when the device body 2 is not in use. For this reason, the shape of the storage section 321 is adapted to the shape of the body 21 of the device body 2.

[0020] A connector board 311 is provided protruding from the top surface of the back 31 of the device stand 3. This connector board 311 is electrically connected to a connection joint (not shown) on the device main body 2 side when the device main body 2 is housed in the housing portion 321 of the receiving portion 32, and is used to charge the battery of the device main body 2.

[0021] A circular hole 322 is formed in the front surface of the receiving portion 32, and a second holding portion is formed inside this circular hole 322 for removably attaching and holding the calibration cap 4. The second holding portion will be described later.

[0022] 8 and 9, the calibration cap 4 includes a cylindrical cap body 41 molded from resin or the like and having a bottom and an open top, and a white calibration plate (corresponding to a calibration member) 42 provided on the inner bottom surface of the cap body 41. The white calibration plate 42 is used for white calibration, which is performed before measurement by the device main body 2. White calibration itself is well known, so a description thereof will be omitted.

[0023] The calibration cap 4 is removably attached to and held by a first holding portion formed at the lower end of the trunk portion 21 of the device main body 2, with a configuration described below.

[0024] That is, two vertically elongated swinging pieces 43, 44 are provided at diametrically opposing positions on the inner peripheral surface of the cap body 41, so as to be swingable within a plane including the length direction of the swinging pieces 43, 44, with their vertical midpoints as fulcrums. Engagement protrusions 431, 441 that protrude inward are formed at the upper ends of each swinging piece 43, 44. Furthermore, the lower ends of each swinging piece 43, 44 are exposed on the outer surface of the cap body 4, forming gripping portions 432, 442. The exposed gripping portions 432, 442 allow the user to pinch the gripping portions 432, 442 of both swinging pieces 43, 44 between two fingers.

[0025] Additionally, springs 45, 46 are disposed at positions inside each of the swinging pieces 43, 44. Each of the springs 45, 46 constantly applies a radially inward biasing force to the engaging protrusions 431, 441 at the upper ends of the swinging pieces 43, 44. Therefore, when a user pinches the gripping portions 432, 442 at the lower ends of each of the swinging pieces 43, 44 with their fingers and presses the gripping portions 432, 442 toward each other, the engaging protrusions 431, 441 of each of the swinging pieces 43, 44 open outward against the biasing force of the springs 45, 46. When the user releases the gripping portions 432, 442, the biasing force of the springs 45, 46 causes the engaging protrusions 431, 441 to move inward and return to their original position. The application of the biasing force to the engaging projections 431, 441 is not limited to the use of spring material, but may be performed by other elastic members other than springs.

[0026] 4 and 10, a hollow throttle section 25 is formed at the lower end of the body section 21 of the device main body 2, the diameter of which tapers downward, and the measurement opening 23 is formed on the underside of the throttle section 25. An annular groove section (corresponding to the first holding section) 24 is formed around the throttle section 25 at the base end of the throttle section 25.

[0027] The minimum distance between the engaging protrusions 431, 441 of the two swinging pieces 43, 44 of the cap body 41, which are biased by the spring materials 45, 46, is set to be smaller than the diameter of the base end of the throttle portion 25. On the other hand, the maximum distance between the engaging protrusions 431, 441 when the swinging pieces 43, 44 swing in the direction in which the engaging protrusions 431, 441 move apart is set to be larger than the diameter of the base end of the throttle portion 25.

[0028] 10 , the white calibration plate 42 of the calibration cap 4 is positioned so as to face the measurement opening 23 of the device body 2, and the user pushes the calibration cap 4 into the restrictor portion 25 from the outside. Then, the engaging protrusions 431, 441 of each swinging piece 43, 44 move apart along the outer inclined surface of the restrictor portion 25 against the biasing force of the spring members 45, 46. When the engaging protrusions 431, 441 pass the base end of the restrictor portion 25 and reach the annular groove 24, the engaging protrusions are returned by the biasing force of the spring members 45, 46 in the direction toward each other, and fit into and engage with the annular groove 24. This allows the calibration cap 4 to be held in the device body 2, as shown in FIG. 11 . When the calibration cap 4 is held in the device body 2, the peripheral edge of the measurement opening 23 of the device body 2 abuts against the white calibration plate 42 of the calibration cap 4, and the surface of the white calibration plate 42 is located on the opening surface of the measurement opening 23.

[0029] The calibration cap 4 is removed from the device body 2 as follows. That is, the user grasps the gripping portions 432, 442 of each of the swinging pieces 43, 44 and pushes the gripping portions 432, 442 toward each other. Then, as shown in FIG. 12 , the engaging protrusions 431, 441 of each of the swinging pieces 43, 44 move away from each other and disengage from the annular groove 24. In this state, the user can remove the calibration cap 4 from the device body 2 by pulling it away from the body 21.

[0030] In this way, the user can attach and detach the calibration cap 4 to and from the device main body 2 with a simple operation.

[0031] The inner diameter of the circular hole 322 formed in the front surface of the receiving portion 32 of the device stand 3 is set to be larger than the outer diameter of the cap body 41 of the calibration cap 4. Therefore, the cap body 41 is configured to be able to be inserted into the circular hole 322.

[0032] Furthermore, the receiving portion 32 is formed with a truncated cone-shaped bulge 33 (see FIG. 6 ) whose diameter decreases from the base of the circular hole 322 toward the opening of the circular hole 322, and an annular groove 34 (corresponding to the second joint) is formed around the bulge 33 at the base end of the bulge 33. The bulge 33 and the annular groove 34 have substantially the same shapes as the narrowed portion 25 and the annular groove 24 formed in the trunk 21 of the device main body 2.

[0033] Therefore, to attach the calibration cap 4 to the device stand 3, the user simply performs the same operation as the operation for attaching the calibration cap 4 to the annular groove 24 of the device body 2. That is, the user orients the calibration cap 4 so that the white calibration plate 41 faces the bulge 33 (the inner side of the device stand 3), and pushes the calibration cap 4 into the circular hole 322. Then, the engaging protrusions 431 and 441 of the swinging pieces 43 and 44 of the calibration cap 4 fit into and engage with the annular groove 34.

[0034] When removing the calibration cap 4 from the device stand 3, the user can simply perform the same operation as the operation for removing the calibration cap 4 from the annular groove 24 of the device body 2. That is, the user can remove the calibration cap 4 by releasing the engagement between the engaging protrusions 431, 441 of the swinging pieces 43, 44 of the calibration cap 4 and the annular groove 34 and pulling the calibration cap 4 out of the circular hole 322 of the device stand 3.

[0035] Although the case where the annular groove portion (first joint portion) 24 of the device body 2 and the annular groove portion (second joint portion) 34 of the device stand 3 have the same shape has been described, they do not have to have the same shape. The point is that they have a shape that allows the engaging protrusions 431, 441 of the swinging pieces 43, 44 of the calibration cap 4 to engage with the annular groove portions 24, 34 and hold the calibration cap 4 in place.

[0036] In this embodiment, the height of the cap body 41 of the calibration cap 4 is set to be greater than the depth of the circular hole 322. Therefore, when the calibration cap 4 is held on the device stand 3, the gripping portions 432, 442 of the swinging pieces 43, 44 of the calibration cap 4 protrude outward from the opening end face of the circular hole 322. Therefore, the user can easily grip the protruding swinging pieces 43, 44, and the calibration cap 4 can be easily removed.

[0037] Next, a method of using the optical characteristic measuring device 1 according to this embodiment will be described.

[0038] When the device main body 2 is not in use, the body 21 is stored in the storage section 321 of the device stand 3 with the head 22 of the device main body 2 facing up. In this state, a connector board 311 provided on the back 31 of the device stand 3 is automatically inserted into and connected to a connection joint provided on the head 22 of the device main body 2. As shown in Figure 2, an insertion hole 35 for a power adapter is formed on the underside of the back 31 of the device stand 3. When the power adapter is connected to this insertion hole 35, power is supplied to the battery of the device main body 2 via the connector board 311 on the back 31 of the device stand 3 and the connection joint of the device main body 2, and the battery is charged.

[0039] When the device main body 2 is not in use, the calibration cap 4 is fitted into the circular hole 322 of the device stand 3 with the white calibration plate 42 facing inward and is held in the annular groove 34. Because the white calibration plate 42 of the calibration cap 4 faces inward, it is not exposed to the outside. This prevents dust and dirt from adhering to the white calibration plate 42, maintaining highly accurate white calibration.

[0040] When using the device main body 2, the user removes the device main body 2 from the accommodation section 321 of the device stand 3 and removes the calibration cap 4 from the annular groove 34. The calibration cap 4 can be removed by pushing both gripping sections 432, 442 in the direction toward each other to release the engagement between the engaging protrusions 431, 441 at the tips of the swinging pieces 43, 44 and the annular groove 34 of the device stand 3, and then pulling out the calibration cap 4 from the circular hole 322 in this state.

[0041] The calibration cap 4 removed from the device stand 3 is then attached to the device main body 2 taken out of the housing 321 of the device stand 3. To attach the calibration cap 4, the user positions the white calibration plate 42 of the calibration cap 4 toward the narrowed portion 25 of the trunk 21 of the device main body 2 and pushes the calibration cap 4 toward the narrowed portion 25. When the user pushes the calibration cap 4 in, the engaging protrusions 431, 441 of the swinging pieces 43, 44 are guided by the inclined surfaces of the narrowed portion 25 and begin to open. Eventually, the engaging protrusions 431, 441 engage with the annular groove 24 and are locked, and the calibration cap 4 is in an attached state.

[0042] The user brings the device main body 2 with the calibration cap 4 attached and held therein to the measurement location. This eliminates the need to bring the device stand 3, as in the technology described in Patent Document 1, improving usability. Moreover, because the calibration cap 4 is attached with the engaging protrusions 431, 441 and the annular groove 24 locked, there is little risk of the calibration cap 4 accidentally falling off the device main body 2 while the device main body 2 is being carried.

[0043] A user who brings the device main body 2 to a measurement location performs white calibration using the white cap 4. The white calibration is performed while the white cap 4 is attached to the device main body 2.

[0044] When the white calibration is completed, the user removes the white cap 4 from the device main body 2 and performs measurement of the object to be measured.

[0045] When the measurement is complete, the user reattaches the white cap 4 to the device body 2 and moves it to the device stand 3. After moving, the user operates the gripping portions 432, 442 of the swinging pieces 43, 44 to disengage the engaging protrusions 431, 441 from the annular groove 24, and removes the white cap 4 from the device body 2. The user positions the removed white cap 4 so that the white calibration plate 42 faces inward, and pushes it into the circular hole 322 of the device stand 3 until the engaging protrusions 431, 441 of the swinging pieces 43, 44 engage with the annular groove 34, thereby attaching the calibration cap 4 to the device stand 3. The user then places the barrel 21 of the device body 2, from which the calibration cap 4 has been removed, in the storage portion 321 of the device stand 3.

[0046] As described above, in this embodiment, the calibration cap 4 can be removably attached to and held on either the apparatus main body 2 or the apparatus stand 3, thereby preventing loss of the calibration cap 4. [Another Embodiment 1] Figure 13 shows another embodiment of the present invention and is a front view of the calibration cap 4. In this embodiment, an identification information display section 5 is provided on the outer bottom surface of the calibration cap 4, on which unique identification information for identifying the calibration cap 4 is written.

[0047] The calibration cap 4 used for white calibration is associated with each optical characteristic measuring device 1, and the same calibration cap 4 is always used for white calibration for each optical characteristic measuring device 1. For this reason, identification information is displayed on the calibration cap 4 in a location visible to the user. This allows the user to confirm whether the calibration cap 4 is appropriate regardless of whether it is held on the device main body 2 or the device stand 3. The identification information display unit 5 may be made of paper, a resin plate, a metal plate, or an electrical display unit. The location of the identification information display unit 5 need only be visible to the user and is not limited to the outer bottom surface of the calibration cap 4. [Another Embodiment 2] FIG. 14 is a perspective view of the calibration cap 4, showing yet another embodiment of the present invention. In this embodiment, the calibration cap 4 cannot be attached or held if the combination of the device main body 2 or the device stand 3 and the calibration cap 4 is different.

[0048] Specifically, a plurality of (two in this example) convex portions 6 are formed on the inner peripheral surface of the cap body 41 of the calibration cap 4. Meanwhile, although not shown, a plurality of concave portions into which the convex portions 6 fit when the calibration cap 4 is attached are also formed in corresponding positions of the device body 2 and the device stand 3. Note that it is also possible to form concave portions in the calibration cap 4 and convex portions in corresponding positions of the device body 2 and the device stand 3.

[0049] The circumferential position of each convex portion 6 of the calibration cap 4 and the position of each concave portion corresponding to each convex portion 6 are different for each optical characteristic measuring device 1. In other words, each optical characteristic measuring device 1 has a unique combination of convex portions 6 and concave portions.

[0050] Therefore, even if a user attempts to attach the calibration cap 4 to the device body 2 or device stand 3 of another characteristic measuring device 1, the positional relationship between the convex portion 6 and the concave portion does not match, making it impossible to attach or hold the calibration cap 4. This prevents a calibration cap 4 that is not compatible with the optical characteristic measuring device 1 from being mistakenly attached to the device body 2 or device stand 3 and used. Furthermore, the user can easily recognize that the calibration cap 4 is not compatible with the optical characteristic measuring device 1 because the calibration cap 4 cannot be attached.

[0051] In the above description, the positions of the convex portions 6 and the concave portions are made different for each optical characteristic measuring device 1. However, instead of the positions of the convex portions and the concave portions, the number of convex portions and the concave portions or the fitting shape may be made different for each optical characteristic measuring device 1 to correspond to the calibration cap 4 and the optical characteristic measuring device 1. [Another Embodiment 3] Figure 15 shows yet another embodiment of the present invention and is a perspective view of the calibration cap 4. In this embodiment, a chip substrate 7 (corresponding to an identification information storage unit) such as an IC tag that electrically stores identification information for the calibration cap 4 is provided on the inner surface of the cap body 41.

[0052] On the other hand, the device main body 2 and the device stand 3 are equipped with a reading unit and a memory unit that electrically reads the identification information held on the chip substrate 7 when the calibration cap 4 is attached. The memory unit stores the correct identification information of the corresponding calibration cap.

[0053] 16 is a block diagram showing the reading circuit 8 built into each of the device main body 2 and the device stand 3. The reading circuit 8 includes a reading unit 81, a storage unit 82, a processor 83 such as a CPU, and a warning unit 84.

[0054] The reading unit 81 electrically reads the identification information of the calibration cap 4 held on the chip substrate 7 provided on the calibration cap 4. The memory unit 82 stores the appropriate identification information of the calibration cap 4 associated with the optical property measuring device 1 as verification information. The processor 83 compares the identification information of the calibration cap 4 held on the chip substrate 7 read by the reading unit 81 with the identification information stored in the memory unit 82 as verification information. The warning unit 84 displays a warning when the comparison by the processor 83 shows a mismatch between the identification information read by the reading unit 81 and the verification information. The warning may be displayed by voice or as a message on the display unit 221. Alternatively, it may be displayed by lighting an indicator such as an LED lamp. Alternatively, a color-coded display may be used, such as lighting a red lamp in the case of a mismatch and a green lamp in the case of a match.

[0055] FIG. 17 is a flowchart for explaining the operation of the reading circuit 8.

[0056] In step S01, the processor 83 determines whether the calibration cap 4 is attached. If the calibration cap 4 is not attached (NO in step S01), the processor 83 waits for it to be attached. If the calibration cap 4 is attached (YES in step S01), the processor 83 acquires the identification information stored on the chip substrate 7 of the calibration cap 4 via the reader 81 in step S02.

[0057] Next, in step S03, processor 83 acquires identification information for verification from storage unit 82, and then in step S04 compares the identification information acquired via reading unit 81 with the verification information. In step S05, processor 83 determines whether the two match based on the comparison result. If they match (YES in step S05), processor 83 ends the processing. If they do not match (NO in step S05), processor 83 issues a warning via warning unit 84 in step S06.

[0058] In this way, the processor 83 of the device main body 2 and / or device stand 3 to which the calibration cap 4 is attached issues a warning if the identification information held in the attached calibration cap 4 does not match the reference information held by the processor 83. This warning allows the user to easily recognize that the attached calibration cap 4 is not appropriate.

[0059] Furthermore, in this embodiment, the reading circuit 8 including the reading unit 81 on the device main body 2 can be driven not only by the power supply on the device main body 2 side, but also by the power supply on the device stand 3 side. That is, with the device main body 2 housed in the housing 321 of the device stand 3, the user presses the power button 26 on the side of the head 22 of the device main body 2. The reading circuit 8 on the device main body 2 is then driven by the power supply on the device stand 3 side, and the identification information is read from the chip substrate 7 of the calibration cap 4. If the read identification information is incorrect, a warning is issued. This configuration is useful, for example, when the battery of the device main body 2 runs out of charge. On the other hand, when the device main body 2 is removed from the device stand 3 and the calibration cap 4 is attached to the device main body 2, pressing the power button 26 enables the reading circuit 8 to be driven by the power supply on the device main body 2 side.

[0060] 15 shows the case where the identification information storage unit provided in the calibration cap 4 is a chip substrate 7 such as an IC tag that electrically stores identification information. In addition to the chip substrate 7, the identification information storage unit may be configured as a display device that displays identification information using a two-dimensional code such as a barcode or QR code (registered trademark).

[0061] Although one embodiment of the present invention has been described above, the present invention is not limited to the above embodiment.

[0062] For example, although the example has been given in which the calibration cap 4 is held on the front side of the receiving portion 32 of the device stand 3, the holding position is not limited. For example, as shown in Fig. 18, the calibration cap 4 may be held on the side of the receiving portion 32 or on the front side of the back portion 31. Or, as shown in Fig. 19, the calibration cap 4 may be held on the rear surface of the back portion 31. Multiple holding portions may be provided. In either case, it is desirable that the calibration cap 4 be held in a position in which the white calibration plate 42 is not exposed to the outside in order to prevent the adhesion of dirt, dust, and the like.

[0063] Furthermore, although the case where the calibration unit is the calibration cap 4 has been described, the shape of the calibration unit is not limited to a cap shape. The point is that it is sufficient if the calibration unit having the calibration member can be removably held on the device main body 2 and the device stand 3.

[0064] The reading circuit 8 may be built into either the device body 2 or the device stand 3 .

[0065] This application claims priority from Japanese Patent Application No. 2024-6799, filed on January 19, 2024, the disclosure of which is incorporated herein by reference in its entirety.

[0066] The present invention can be used as an optical characteristic measuring device such as a colorimeter.

[0067] REFERENCE SIGNS LIST 1 Optical property measuring device 2 Device body 3 Device stand 4 Calibration cap (calibration unit) 5 Identification information display section 6 Convex section 7 Chip substrate 8 Reading circuit 21 Body section 22 Head section 23 Measurement opening 24 Annular groove section (first holding section) 25 Diaphragm section 26 Power button 31 Back section 32 Receiving section 33 Bulging section 34 Annular groove section (second holding section) 35 Power adapter socket 41 Cap body 42 White calibration plate (calibration member) 43, 44 Oscillating pieces 45, 46 Spring material 81 Reading section 82 Memory section 83 Processor 84 Warning section 221 Display section 222 Operation key section 223 Communication cable connection section 311 Connector board 321 Storage section 322 Circular holes 431, 441 Engagement protrusion 432, 442 gripping part

Claims

1. An optical property measuring device comprising: a device main body; a device stand for detachably accommodating the device main body; and a calibration unit having a calibration member used for calibrating the device main body, wherein a first holding portion for removably holding the calibration unit to the device main body is formed on the device main body in a state where the calibration member faces a measurement opening of the device main body, and a second holding portion for removably holding the calibration unit is formed on the device stand when the calibration unit is not held by the device main body.

2. The optical property measuring device according to claim 1, wherein the first holding portion of the device main body and the second holding portion of the device stand are formed in the same shape.

3. The optical property measuring device according to claim 1 or 2, wherein a part of the calibration unit protrudes from the device stand in a state where the calibration unit is held by the second holding portion of the device stand.

4. The optical property measuring device according to claim 1 or 2, wherein the second holding portion of the device stand holds the calibration unit in a posture where the calibration member faces the inside of the device stand.

5. The optical property measuring device according to claim 1 or 2, wherein identification information of the calibration unit is displayed at a visible position in a state where the calibration unit is held by the first holding portion of the device main body and the second holding portion of the device stand.

6. The optical property measuring device according to claim 1 or 2, wherein a unique concave portion or convex portion is formed on the device main body and the device stand for each optical property measuring device, a unique convex portion or concave portion corresponding to the concave portion or convex portion is formed on the calibration unit for each optical property measuring device, and the calibration unit is held by the first holding portion or the second holding portion in a state where the concave portion and the convex portion are fitted together.

7. The optical property measuring device according to claim 1 or 2, wherein the calibration unit includes an identification information holding portion for holding identification information of the calibration unit, and the device main body and / or the device stand includes a reading portion for reading the identification information from the identification information holding portion.

8. The optical property measuring device according to claim 7, wherein the device main body and / or the device stand includes: a determination means for determining whether the identification information read by the reading portion matches or does not match the identification information held by the device main body and / or the device stand; and a warning means for outputting a warning when it is determined by the determination means that they do not match.

9. The optical property measuring apparatus according to claim 7, wherein when the apparatus main body includes the reading unit, the reading unit can be driven by the power supply on the apparatus stand side.

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