Spectroscopic measurement equipment

Abstract

To provide a spectroscopic measurement device that can easily acquire data on a plurality of types of measurement targets with high accuracy.SOLUTION: A spectroscopic measurement device 1 includes a body 2, a head 3A detachably attached to the body 2, and a spectroscope 4. The body 2 includes a housing 21 and a control unit 22 arranged inside the housing 21. The head 3A includes a plurality of light sources 31 for emitting irradiation light L1 to be irradiated on an object, a wiring board 33 on which the plurality of light sources 31 are mounted, and a light guide 34 for guiding measurement light L2 emitted from the object. The spectroscope 4 spectrally detects the measurement light L2 guided by the light guide 34. The control unit 22 controls the plurality of light sources 31 and the spectroscope 4.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a spectroscopic measurement device. [Background technology]

[0002] A spectroscopic measurement device is known that includes a head unit including multiple light sources that emit irradiation light to be irradiated onto an object, an optical cable through which measurement light incident on the head unit from the object propagates, and a main unit that detects the measurement light propagated through the optical cable by dispersing it (see, for example, Patent Document 1). Such a spectroscopic measurement device is used to obtain a predetermined quantitative value of an object (for example, fat mass, fat percentage, etc. in a human body) by utilizing the property that a measurement object (for example, fat contained in a human body) easily absorbs light of a specific wavelength. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2019-070550 A Summary of the Invention [Problem to be solved by the invention]

[0004] Incidentally, the wavelength of light that is easily absorbed by the measurement object may vary depending on the measurement object. For example, the wavelength of light that is easily absorbed by fat is about 930 nm, the wavelength of light that is easily absorbed by chlorophyll is about 670 nm, and the wavelength of light that is easily absorbed by water is about 956 nm. For this reason, spectroscopic measurement devices such as those described above tend to be designed specifically for each measurement object.

[0005] An object of the present invention is to provide a spectroscopic measurement device that can easily and accurately acquire data relating to a plurality of types of measurement targets. [Means for solving the problem]

[0006] The spectroscopic measurement device of the present invention comprises a main body including a housing and a control unit arranged within the housing, a head unit including a plurality of light sources that emit irradiation light to be irradiated onto an object, a wiring board on which the plurality of light sources are mounted, and a light guiding unit that guides the measurement light emitted from the object, and is detachably attached to the main body, and a spectroscope that disperses and detects the measurement light guided by the light guiding unit, and the control unit controls the plurality of light sources and the spectroscope.

[0007] With this spectroscopic measurement device, for example, by preparing multiple types of head units each irradiating light with different wavelengths, it is possible to select the head unit appropriate for measurement of multiple types of measurement objects and attach it to the main body. Furthermore, because the head unit includes not only multiple light sources but also a light guide unit, the positional relationship between the light guide unit and the multiple light sources can be optimized depending on the measurement object. Furthermore, because the distance between the light guide unit and the spectrometer is shortened, it is possible to improve the efficiency of incidence of measurement light on the spectrometer and, ultimately, improve the spectroscopic accuracy of the measurement light by the spectrometer. Therefore, with this spectroscopic measurement device, data on multiple types of measurement objects can be easily and accurately obtained.

[0008] In the spectroscopic measurement device of the present invention, the light guide unit may include a cylindrical member having a light entrance opening and a light exit opening, thereby suppressing the incidence of ambient light and allowing the measurement light emitted from a specific portion of the object to efficiently enter the spectroscope.

[0009] In the spectroscopic measurement device of the present invention, the wiring board may have an opening, and the cylindrical member may extend to both sides of the wiring board via the opening. This allows the multiple light sources, the wiring board, and the light guide to be efficiently arranged, thereby making it possible to reduce the size of the head unit.

[0010] In the spectroscopic measurement device of the present invention, the cylindrical member may be made of metal, which can improve the durability of the cylindrical member.

[0011] In the spectroscopic measurement device of the present invention, the inner surface of the cylindrical member may be a light-reflecting surface, which allows the measurement light to be more efficiently incident on the spectroscope.

[0012] In the spectroscopic measurement device of the present invention, the light guide unit may include a lens that focuses the measurement light emitted from the object onto the light entrance unit of the spectroscope, thereby making it possible to more efficiently direct the measurement light into the spectroscope.

[0013] In the spectroscopic measurement device of the present invention, the plurality of light sources may be arranged to surround the light guiding section, whereby the measurement light emitted from the object in response to irradiation with the irradiation light can be stably incident on the light guiding section.

[0014] In the spectroscopic measurement device of the present invention, the head unit may further include a holding member having a plurality of first through holes and a plurality of second through holes, and the plurality of light sources may be arranged inside the plurality of first through holes, respectively, and the light guiding unit may be arranged inside the second through hole. This makes it possible to maintain a predetermined positional relationship between the light guiding unit and the plurality of light sources.

[0015] In the spectroscopic measurement device of the present invention, the spectroscope may be attached to the main body, which allows the spectroscope and the control unit to be used in common.

[0016] In the spectroscopic measurement device of the present invention, the spectroscope may be attached to the head unit, whereby a spectroscope suitable for measurement can be used for a plurality of types of measurement targets.

[0017] In the spectroscopic measurement device of the present invention, the head unit may further include a memory mounted on the wiring board, the memory storing characteristic data of the plurality of light sources, and the control unit may acquire the characteristic data from the memory and the detection signal from the spectrometer, and output the characteristic data and the detection signal to an external calculation unit, thereby simplifying the configuration of the control unit.

[0018] In the spectroscopic measurement device of the present invention, the head unit may further include a memory mounted on the wiring board, the memory storing characteristic data of the plurality of light sources, and the control unit may acquire the characteristic data from the memory and the detection signal from the spectrometer, and calculate a predetermined quantitative value of the object based on the characteristic data and the detection signal. This allows the spectroscopic measurement device to operate as a standalone device. [Effects of the Invention]

[0019] According to the present invention, it is possible to provide a spectroscopic measurement device that can easily and accurately acquire data on a plurality of types of measurement targets. [Brief explanation of the drawings]

[0020] [Figure 1] FIG. 1 is a perspective view of a spectroscopic measurement device according to an embodiment. [Figure 2] FIG. 2 is a cross-sectional view taken along line II-II shown in FIG. [Figure 3] FIG. 3 is an enlarged view of the head portion shown in FIG. 2. [Figure 4] FIG. 4 is a cross-sectional view taken along line IV-IV shown in FIG. 3. [Figure 5] FIG. 4 is a cross-sectional view taken along line VV shown in FIG. [Figure 6] FIG. 4 is a cross-sectional view taken along line VI-VI shown in FIG. [Figure 7] FIG. 2 is an exploded perspective view of the spectroscopic measurement device shown in FIG. [Figure 8] FIG. 10 is a front view of a light source unit of another head portion. [Figure 9] FIG. 10 is a front view of a light source unit of another head portion. [Figure 10] 2 is a sequence diagram showing an example of the operation of the spectroscopic measurement device shown in FIG. 1. FIG. [Figure 11] FIG. 10 is a sequence diagram illustrating an example of the operation of another spectroscopic measurement device. DETAILED DESCRIPTION OF THE INVENTION

[0021] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In each drawing, the same or corresponding parts are designated by the same reference numerals, and redundant explanations will be omitted.

[0022] As shown in FIG. 1, the spectroscopic measurement device 1 irradiates an object S with irradiation light L1 of a predetermined wavelength, and detects measurement light L2 emitted from the object S in response to the irradiation of the irradiation light L1. The spectroscopic measurement device 1 outputs a detection signal of the measurement light L2 to an external calculation unit 100. The calculation unit 100 calculates a predetermined quantitative value of the object S based on the detection signal of the measurement light L2. The calculation unit 100 is a computer device such as a personal computer, a smartphone, or a tablet terminal. As an example, the spectroscopic measurement device 1 outputs the detection signal of the measurement light L2 to the external calculation unit 100 to obtain a predetermined quantitative value of the object S (e.g., fat mass, fat percentage, etc. in the human body) by utilizing the property that the measurement object (e.g., fat contained in the human body) easily absorbs light of a specific wavelength.

[0023] 1 and 2, the spectroscopic measurement device 1 includes a main body 2, a head 3A, and a spectrometer 4. The main body 2 includes a housing 21, a control unit 22, a support structure 23, a switch 24, and a cable 25. The head 3A includes multiple light sources 31, a memory 32, a wiring board 33, a light guide 34, a holding member 35, and a cover 36. In the following description, a direction parallel to the incident direction of the measurement light L2 is referred to as direction A, and one side of direction A is referred to as a first side and the other side is referred to as a second side, respectively.

[0024] The housing 21 includes a cylindrical side wall 210, a first wall 211, and a second wall 212. The side wall 210 has, for example, a cylindrical shape with a center line that is parallel to direction A. The housing 21 functions as a grip for an operator to hold. A plurality of grooves are provided on the outer surface of the side wall 210 to make it easier for the operator to grip. The first wall 211 is disposed on a first side with respect to the side wall 210. The first wall 211 has openings 211a that open to the first and second sides. In this embodiment, the first wall 211 is fixed to an end 210a on the first side of the side wall 210 by, for example, a bolt (not shown). The second wall 212 is disposed on a second side with respect to the side wall 210. The second wall 212 has a through-hole 212a. In this embodiment, the second wall 212 is formed integrally with the side wall 210.

[0025] The control unit 22 is disposed within the housing 21. The control unit 22 is fixed to a support structure 23 attached to a sidewall 210 within the housing 21, for example, by bolts (not shown). The control unit 22 controls the multiple light sources 31 and the spectrometer 4. The control unit 22 is configured with electronic components including, for example, an integrated circuit such as an FPGA (field-programmable gate array) and a non-volatile memory such as an EEPROM (electrically erasable programmable read-only memory). The switch 24 is disposed on the sidewall 210. The switch 24 is electrically connected to the control unit 22 via wiring (not shown). The cable 25 extends inside and outside the housing 21 through a through-hole 212a in the housing 21. The cable 25 electrically connects the control unit 22 to the calculation unit 100. For example, the cable 25 is electrically connected to the calculation unit 100 via a USB connector.

[0026] As shown in FIGS. 3, 4, 5, and 6, the wiring board 33 is disposed on the first side of the main body 2, with the thickness direction of the wiring board 33 coinciding with direction A. When viewed from direction A, the wiring board 33 has, for example, a circular shape. The wiring board 33 has openings 33a that open to the first and second sides. The plurality of light sources 31 and the memory 32 are mounted on the wiring board 33. In this embodiment, the plurality of light sources 31 and the memory 32 are mounted on the main surface of the wiring board 33 on the first side. A connector 33b is provided on the main surface of the wiring board 33 on the second side. Wiring (not shown) extending from the control unit 22 is detachably connected to the connector 33b. The plurality of light sources 31 and the memory 32 are electrically connected to the control unit 22 via the wiring board 33, the connector 33b, and the wiring (not shown).

[0027] Each light source 31 emits irradiation light L1 to be irradiated onto the target S (see FIG. 1 ) toward a first side. Each light source 31 is, for example, an LED (light emitting diode). The memory 32 stores characteristic data of the plurality of light sources 31. The memory 32 is, for example, a non-volatile memory such as an EEPROM. The characteristic data of the plurality of light sources 31 includes, for example, data indicating the wavelength range, wavelength spectrum, and / or center wavelength of the irradiation light L1 emitted by each light source 31, data for calibrating the intensity, etc., of the irradiation light L1 emitted by each light source 31, and data indicating a quantification algorithm for calculating a predetermined quantitative value of the target S.

[0028] The holding member 35 is disposed on a first side of the wiring board 33. When viewed from the direction A, the holding member 35 has, for example, a circular shape. The holding member 35 has a plurality of first through holes 35a, second through holes 35b, and third through holes 35c. The plurality of first through holes 35a, second through holes 35b, and third through holes 35c each penetrate the holding member 35 along the direction A. The wiring board 33 is fixed to the holding member 35 by, for example, bolts (not shown) with the light sources 31 disposed inside the first through holes 35a and the scale marks 32 disposed inside the third through holes 35c. Note that the holding member 35 may have a recess opening to the second side instead of the third through holes 35c, and the scale marks 32 may be disposed inside the recess.

[0029] The light guide 34 guides the measurement light L2 emitted from the object S (see FIG. 1) from the first side to the second side. In this embodiment, the light guide 34 is a cylindrical tubular member 340 having a center line parallel to the direction A. The tubular member 340 has a light entrance opening 340a on the first side and a light exit opening 340b on the second side. For example, the tubular member 340 has a cylindrical shape in which only the end portion on the second side including the light exit opening 340b has an expanded diameter. The tubular member 340 is made of metal (e.g., aluminum). An inner surface 340c of the tubular member 340 is a light-reflecting surface. The inner surface 340c may be treated to increase light reflectance. The multiple light sources 31 are arranged to surround the tubular member 340. For example, when viewed from the direction A, the multiple light sources 31 are arranged on a single circumference, and the tubular member 340 is located at the center of the single circumference.

[0030] The cylindrical member 340 is fixed to the holding member 35 by, for example, a setscrew (not shown) with a first side portion of the cylindrical member 340 disposed inside the second through-hole 35b. That is, the cylindrical member 340 is disposed inside the second through-hole 35b. The cylindrical member 340 extends to both sides of the wiring board 33 via the opening 33a. The light incident opening 340a is located on the first side with respect to the wiring board 33, and the light exit opening 340b is located on the second side with respect to the wiring board 33. The end of the second through-hole 35b on the first side has a tapered diameter.

[0031] In this embodiment, the light source unit 30 is configured by mounting a plurality of light sources 31 and memories 32 on a wiring board 33 and fixing the tubular member 340 and the wiring board 33 to a holding member 35. The light source unit 30 has a plurality of positioning holes 30a. Each positioning hole 30a penetrates the wiring board 33 along direction A and opens to the second side of the holding member 35. A plurality of positioning pins 20a protruding from the first wall 211 to the second side correspond to the plurality of positioning holes 30a. The light source unit 30 is positioned with respect to the main body 2 by inserting each positioning pin 20a into each positioning hole 30a and bringing the wiring board 33 into contact with the first wall 211.

[0032] When the light source unit 30 is positioned relative to the main body 2, the second through-hole 35b of the holding member 35, the opening 33a of the wiring board 33, and the opening 211a of the housing 21 are aligned along the direction A. As an example, when viewed from the direction A, the second through-hole 35b is included in the opening 33a, and the opening 33a is included in the opening 211a. When the light source unit 30 is positioned relative to the main body 2, the light exit opening 340b of the cylindrical member 340 is located inside the opening 211a of the housing 21, and the connector 33b protrudes into the housing 21 through the opening 211a.

[0033] The cover 36 includes a cylindrical main body member 360 and a plate-like light-transmitting member 361. The main body member 360 has, for example, a cylindrical shape with a center line that is parallel to the direction A. The light-transmitting member 361 is fixed to the main body member 360 while closing the first end of the main body member 360. In this embodiment, a female screw 36a provided on the cover 36 and a male screw 21a provided on the housing 21 are threadedly engaged with each other, thereby maintaining the light source unit 30 positioned relative to the main body 2. The female screw 36a is provided on the inner surface of the second end 360a of the main body member 360, and the male screw 21a is provided on the outer surface of the first end 210a of the housing 21.

[0034] The spectroscope 4 disperses and detects the measurement light L2 guided by the cylindrical member 340. The spectroscope 4 includes a housing having a light incident portion 4a onto which the measurement light L2 is incident, a diffraction grating that disperses the incident measurement light L2 within the housing, and a photodetector that detects the dispersed measurement light L2 within the housing. In this embodiment, the spectroscope 4 is disposed within the housing 21 so that the light incident portion 4a faces the opening 211a of the housing 21, and is held by the support structure 23 so that the light incident portion 4a is positioned on the center line of the cylindrical member 340. In other words, the spectroscope 4 is attached to the main body 2. When the light source unit 30 is positioned relative to the main body 2, the second end of the cylindrical member 340 is in contact with the support structure 23. The photodetector of the spectroscope 4 is electrically connected to the control unit 22 via wiring (not shown).

[0035] In the spectroscopic measurement device 1 configured as described above, the head unit 3A is detachably attached to the main body unit 2, so that the head unit 3A can be replaced with another head unit. The reason why the head unit 3A needs to be replaced is that the "wavelength of the irradiated light L1" suitable for measurement and the "positional relationship between the light guide unit 34 and each light source 31" vary depending on the measurement target, measurement position, etc.

[0036] As an example, as shown in FIG. 7, when multiple types of heads 3A, 3B, and 3C are prepared, one head is selected from the multiple types of heads 3A, 3B, and 3C depending on the measurement target and measurement position, and the selected head is attached to the main body 2. Each of the heads 3B and 3C differs from the head 3A in the characteristics of the multiple light sources 31. In this example, the diameter of the head 3A is smaller than the diameter of the head 3B, and the diameter of the head 3C is larger than the diameter of the head 3B. Note that the diameters of the heads 3A, 3B, and 3C may be the same.

[0037] As shown in Fig. 8, in the light source unit 30 of the head part 3B, a plurality of light sources 31 are arranged on two circumferences having a common center, and a cylindrical member 340 is located at the center. As shown in Fig. 9, in the light source unit 30 of the head part 3C, a plurality of light sources 31 are arranged on three circumferences having a common center, and a cylindrical member 340 is located at the center. In the light source unit 30 of each of the head parts 3B and 3C, the plurality of light sources 31 arranged on the outer circumference are used when the measurement position is deep from the surface of the target object S.

[0038] The wavelength ranges of the irradiating light L1 emitted by each light source 31 in the head unit 3A, the wavelength ranges of the irradiating light L1 emitted by each light source 31 in the head unit 3B, and the wavelength ranges of the irradiating light L1 emitted by each light source 31 in the head unit 3C are at least partially offset from one another. For example, when the measurement target is fat, the wavelength of light easily absorbed by fat is approximately 930 nm, so a light source 31 emitting irradiating light L1 in a wavelength range of 875 to 940 nm is used. When the measurement target is chlorophyll, the wavelength of light easily absorbed by chlorophyll is approximately 670 nm, so a light source 31 emitting irradiating light L1 in a wavelength range of 670 to 700 nm is used. When the measurement target is water, the wavelength of light easily absorbed by water is approximately 956 nm, so a light source 31 emitting irradiating light L1 in a wavelength range of 935 to 950 nm is used.

[0039] While the heads 3B and 3C differ from the head 3A in the characteristics of the plurality of light sources 31, the positions of the plurality of positioning holes 30a in the light source unit 30 of each of the heads 3B and 3C are the same as the positions of the plurality of positioning holes 30a in the light source unit 30 of the head 3A (see FIG. 3). Furthermore, the shape of the end 360a and the standard of the female thread 36a in the cover 36 of each of the heads 3B and 3C are the same as the shape of the end 360a and the standard of the female thread 36a in the cover 36 of the head 3A (see FIG. 3).

[0040] Therefore, any of the multiple types of head units 3A, 3B, and 3C can be attached to the main body 2. Here, an example of the procedure for attaching each of the head units 3A, 3B, and 3C to the main body 2 will be described. First, wiring (not shown) extending from the control unit 22 is connected to the connector 33b (see FIG. 3). Next, each positioning pin 20a is inserted into each positioning hole 30a, and the wiring board 33 is brought into contact with the first wall 211 (see FIG. 3). This positions the light source unit 30 relative to the main body 2. Next, the female screw 36a provided in the cover 36 and the male screw 21a provided in the housing 21 are screwed together (see FIG. 3). This completes the attachment of one head unit to the main body 2.

[0041] When one head unit selected from the plurality of types of head units 3A, 3B, and 3C is attached to the main body unit 2, spectroscopic measurement of the object S and calculation of a predetermined quantitative value for the object S are performed. Here, an example of the procedure for spectroscopic measurement of the object S and calculation of a quantitative value will be described with reference to FIG. 10 . First, when the cable 25 is connected to the calculation unit 100, the power of the light source unit 30 and the control unit 22 are turned on. Next, the control unit 22 acquires characteristic data of the plurality of light sources 31 from the memory 32 of the light source unit 30, and the control unit 22 outputs the characteristic data of the plurality of light sources 31 and the characteristic data of the spectroscope 4 to the calculation unit 100. Next, the calculation unit 100 selects a quantification algorithm for calculating a predetermined quantitative value for the object S based on the characteristic data of the plurality of light sources 31.

[0042] Next, when the switch 24 is pressed or the control unit 22 receives a measurement instruction from the calculation unit 100, spectroscopic measurement of the object S is performed. That is, each light source 31 emits irradiation light L1, and the spectroscope 4 disperses and detects the measurement light L2, and the control unit 22 acquires a detection signal from the spectroscope 4. At this time, the control unit 22 calibrates the intensity, etc. of the irradiation light L1 emitted by each light source 31 based on characteristic data of the multiple light sources 31, and calibrates the intensity, etc. of the detection signal output from the spectroscope 4 based on characteristic data of the spectroscope 4. Next, the control unit 22 outputs the detection signal to the calculation unit 100. Next, the calculation unit 100 calculates a predetermined quantitative value of the object S based on the selected quantification algorithm and the acquired detection signal, and displays the result on the display.

[0043] As described above, with the spectroscopic measurement device 1, for example, by preparing multiple types of heads 3A, 3B, and 3C that emit different wavelengths of irradiated light L1, it is possible to select a head suitable for measurement of multiple types of measurement objects and attach it to the main body 2. Furthermore, because each head 3A, 3B, and 3C includes not only multiple light sources 31 but also a light guide 34, the positional relationship between the light guide 34 and the multiple light sources 31 can be optimized depending on the measurement object. Furthermore, because the distance between the light guide 34 and the spectrometer 4 is shortened, it is possible to improve the incidence efficiency of the measurement light L2 on the spectrometer 4 and, ultimately, improve the spectroscopic accuracy of the measurement light L2 by the spectrometer 4. Therefore, with the spectroscopic measurement device 1, data on multiple types of measurement objects can be easily and accurately acquired.

[0044] In the spectroscopic measurement device 1, the light guide 34 includes a cylindrical tubular member 340 having a light entrance opening 340a and a light exit opening 340b. This allows the measurement light L2 emitted from a specific portion of the object S to be efficiently incident on the spectroscope 4 while suppressing the incidence of ambient light.

[0045] In the spectroscopic measurement device 1, the wiring board 33 has an opening 33a, and the tubular member 340 extends through the opening 33a to both sides of the wiring board 33. This allows the multiple light sources 31, the wiring board 33, and the light guide 34 to be efficiently arranged, and each of the head units 3A, 3B, and 3C can be made smaller.

[0046] In the spectroscopic measurement device 1, the cylindrical member 340 is made of metal, which makes it possible to improve the durability of the cylindrical member 340.

[0047] In the spectroscopic measurement device 1, the inner surface 340c of the cylindrical member 340 is a light reflecting surface, which allows the measurement light L2 to be incident on the spectroscope 4 more efficiently.

[0048] In the spectroscopic measurement device 1, multiple light sources 31 are arranged to surround the light guiding unit 34. This allows the measurement light L2 emitted from the object S in response to irradiation with the irradiation light L1 to be stably incident on the light guiding unit 34.

[0049] In the spectroscopic measurement device 1, in each of the head units 3A, 3B, and 3C, the holding member 35 has a plurality of first through holes 35a and second through holes 35b, and each light source 31 is disposed inside each of the first through holes 35a, and the light guiding unit 34 is disposed inside each of the second through holes 35b. This makes it possible to maintain a predetermined positional relationship between the light guiding unit 34 and the plurality of light sources 31.

[0050] In the spectroscopic measurement device 1, the spectroscope 4 is attached to the main body 2. This allows the spectroscope 4 and the control unit 22 to be used in common.

[0051] In the spectroscopic measurement device 1, the control unit 22 acquires characteristic data of the plurality of light sources 31 from the memory 32 of each of the head units 3A, 3B, and 3C, acquires detection signals from the spectroscope 4, and outputs the characteristic data and detection signals to the external calculation unit 100. This simplifies the configuration of the control unit 22.

[0052] The present invention is not limited to the above-described embodiments. For example, the control unit 22 may acquire characteristic data of the plurality of light sources 31 from the memory 32 and may acquire detection signals from the spectroscope 4, and calculate a predetermined quantitative value of the target S based on the acquired characteristic data and detection signals. This allows the spectroscopic measurement device 1 to operate as a stand-alone device. In this case, a display may be provided on the main body 2.

[0053] An example of the procedure for spectroscopic measurement of the object S and calculation of the quantitative value in this case will be described with reference to FIG. 11 . First, when the switch 24 is pressed for a predetermined time, the power of the light source unit 30 and the control unit 22 are turned on. Next, the control unit 22 acquires characteristic data of the plurality of light sources 31 from the memory 32 of the light source unit 30 and selects a quantification algorithm for calculating the predetermined quantitative value of the object S based on the characteristic data of the plurality of light sources 31. Next, the control unit 22 performs spectroscopic measurement of the object S, triggered by another press of the switch 24 (receiving a measurement start instruction). At this time, the control unit 22 calibrates the intensity, etc. of the irradiation light L1 emitted by each light source 31 based on the characteristic data of the plurality of light sources 31, and calibrates the intensity, etc. of the detection signal output from the spectroscope 4 based on the characteristic data of the spectroscope 4. Next, the control unit 22 calculates the predetermined quantitative value of the object S based on the selected quantification algorithm and the acquired detection signal, and displays the result on the display.

[0054] The spectroscope 4 may be attached to each of the head units 3 A, 3 B, and 3 C. This allows the spectroscope 4 suitable for measurement to be used for a plurality of types of measurement targets.

[0055] The light guide 34 may include, instead of or together with the cylindrical member 340, a lens that focuses the measurement light L2 onto the light incident portion 4a of the spectrometer 4. This allows the measurement light L2 to be incident on the spectrometer 4 more efficiently.

[0056] Although the control unit 22 and the calculation unit 100 are electrically connected by a wire (cable 25), they may be electrically connected wirelessly instead of by a wire.

[0057] When the diameters of the heads 3A, 3B, and 3C are different, the wavelength range of the irradiated light L1 emitted by each light source 31 of the head 3A, the wavelength range of the irradiated light L1 emitted by each light source 31 of the head 3B, and the wavelength range of the irradiated light L1 emitted by each light source 31 of the head 3C may be the same. Even if the measurement target is the same, spectroscopic measurement may be required for regions at different depths. In such cases, by selecting a head with an optimal diameter from the multiple heads 3A, 3B, and 3C (for example, by selecting the head 3A with a small diameter when performing spectroscopic measurement on a shallow region and selecting the head 3C with a large diameter when performing spectroscopic measurement on a deep region), spectroscopic measurement can be optimized for each region at different depths.

[0058] When the diameters of the heads 3A, 3B, and 3C are different, and the wavelength ranges of the irradiation light L1 emitted by each light source 31 of the head 3A, the wavelength ranges of the irradiation light L1 emitted by each light source 31 of the head 3B, and the wavelength ranges of the irradiation light L1 emitted by each light source 31 of the head 3C are the same, the intensities of the irradiation light L1 emitted by each light source 31 of the head 3A, the intensity of the irradiation light L1 emitted by each light source 31 of the head 3B, and the intensity of the irradiation light L1 emitted by each light source 31 of the head 3C may be different from one another. For example, if the intensity of the irradiation light L1 emitted by each light source 31 is increased for a head with a larger diameter, when spectroscopic measurement of a deeper region is to be performed, the accuracy of the spectroscopic measurement of the deeper region can be improved by selecting the head 3C with a larger diameter and with a higher intensity of the irradiation light L1 emitted by each light source 31. [Explanation of symbols]

[0059] 1...spectroscopic measurement device, 2...main body, 3A, 3B, 3C...head, 4...spectroscope, 4a...light entrance section, 21...housing, 22...control section, 31...light source, 32...memory, 33...wiring board, 33a...opening, 34...light guide section, 35...holding member, 35a...first through hole, 35b...second through hole, 340...cylindrical member, 340a...light entrance opening, 340b...light exit opening, 340c...inner surface, 100...calculation section, L1...irradiation light, L2...measurement light, S...object.

Claims

1. a main body including a housing and a control unit disposed within the housing; a head unit including a plurality of light sources that emit irradiation light to be irradiated onto an object, a wiring board on which the plurality of light sources are mounted, a light guide unit that guides the measurement light emitted from the object, and a memory mounted on the wiring board, and the head unit is detachably attached to the main body unit; a spectroscope that separates and detects the measurement light guided by the light guide unit, the control unit controls the plurality of light sources and the spectroscope; the memory stores characteristic data of the plurality of light sources; The control unit acquires the characteristic data from the memory and acquires a detection signal from the spectroscope.

2. The spectroscopic measurement device according to claim 1 , wherein the light guide portion includes a cylindrical member having a light entrance opening and a light exit opening.

3. the wiring substrate has an opening; The spectroscopic measurement device according to claim 2 , wherein the cylindrical member extends to both sides of the wiring board through the opening.

4. The spectroscopic measurement device according to claim 2 or 3, wherein the cylindrical member is made of metal.

5. 5. The spectroscopic measurement device according to claim 2, wherein the inner surface of the cylindrical member is a light reflecting surface.

6. 6. The spectroscopic measurement device according to claim 1, wherein the light guide section includes a lens that focuses the measurement light emitted from the object onto a light entrance section of the spectroscope.

7. 7. The spectroscopic measurement device according to claim 1, wherein the plurality of light sources are arranged so as to surround the light guiding section.

8. the head portion further includes a holding member having a plurality of first through holes and a second through hole; the plurality of light sources are disposed inside the plurality of first through holes, respectively; The spectroscopic measurement device according to any one of claims 1 to 7, wherein the light guide section is disposed inside the second through hole.

9. The spectroscopic measurement device according to any one of claims 1 to 8, wherein the spectroscope is attached to the main body.

10. The spectroscopic measurement device according to any one of claims 1 to 8, wherein the spectroscope is attached to the head portion.

11. A spectroscopic measurement device described in any one of claims 1 to 10, wherein the control unit outputs the characteristic data and the detection signal to an external calculation unit.

12. A spectroscopic measurement device described in any one of claims 1 to 10, wherein the control unit calculates a predetermined quantitative value for the object based on the characteristic data and the detection signal.

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