JP6873458B2 - Light characteristic measurement system - Google Patents

Description

The present invention relates to a characteristic measurement system using light and a method for measuring characteristics using light, and in particular, a characteristic measuring system using light and light that measure the characteristics of an object by incident light and utilizing at least one of the characteristics of transmission and reflection. Regarding the characteristic measurement method by.

The aging rate is high in Japan. For example, cosmetics manufacturers are energetically developing cosmetics based on collagen and the like to give a feeling of skin rejuvenation. In the future, the shift to aging will increase, and research and development in this direction is expected to progress further.

Currently, as a measurement of cosmetic evaluation, there is a microscope or the like that can directly observe the skin. However, this only observes the tissue morphology and cannot measure the transparency.

Further, in the case of a conventional colorimeter that measures the spectral distribution by irradiating illumination light, it has not been possible to examine the transparency of the skin until the reflection characteristics of the skin can be measured.

As described above, the conventional skin measurement has stopped observing with the microscope type. On the other hand, there is a method using a colorimeter, but this is a method using a general colorimetric optical system, and even reflection measurement was possible. In the future, it is thought that there will be a need for something that can objectively investigate the condition of the skin and produce results.

For some time, there have been TRS, phase difference method, SRS and the like as spectroscopic methods for examining the internal information of scatterable samples such as skin and foods and pharmaceuticals in detail. These have been studied especially for the realization of optical CT.

TRS is an abbreviation for Time Recommended Spectroscopy, and is a method for measuring the time from when light is incident on a sample to when it is emitted. For example, there is a method of counting each Photon individually, which is described in Non-Patent Document 1 and Non-Patent Document 2.

The phase difference method is a method in which a short pulsed light of 70 MHz to 200 Hz or the like is given and the inside of the sample is investigated from the difference between the given waveform and the output waveform, which is described in Non-Patent Document 3.

SRS (Spatial Resolved Spectroscopy) is a method of precisely investigating a substance inside a sample by constructing a distance difference between an incident and an emitted using spatial information. It has been considered that broad white light can be used as a light source, and light from a plurality of points can be simultaneously acquired by using an aberration-free spectroscope for spectroscopy, and each can be separated. This is described, for example, in Prior Document 4.

Further, Patent Document 1 and Non-Patent Document 5 are described as a transmission-only device for measuring a scatterable sample.

As a conventional device for measuring the reflected light distribution characteristic, there is a goniometer.

JP-A-2002-248080

Michael S. Patterson, B. Chance, and BC Wilson, "Time resolved reflectance and transmittance for the noninvasive measurement of tissue optical properties", Optical Society of America, Applied Optics, June 15, 1989, Vol. 28, No. 12, p. 2331-2336 M.Oda, Y.Yamashita, H.Kan, H.Miyajima, A.Sawaki, T.Nakano, S.Suzuki, A.Suzuki, K.Shimizu, S.Muramatsu, N.Sugiura, K.Ohta and Y. Tsuchiya "Advanced Devices for Near-infrared Time-Resolved Spectroscopy and Optical Computed Tomography: High Sensitive / Fast PMT, High Power PLP, Miniaturized CFD / TAC Module and High Speed Multi-Channel Signal Acquisition Unit", The Society of Photo-Optical Instrumentation Engineers, February 9-12, 1997, Vol. 2979, p.765-773 Matthias Kohl-Bareis, Russell W. Watson, Gabriel Chow, Idris Roberts, David T. Delpy, Mark Cope, "Monitoring of cerebral hemodynamics during open-heart surgery in children using near-infrared intensity-modulated spectroscopy" The International Society for Optical Engineering, August 18, 1997, Vol. 2979, p. 408-416 Michael G. Nichols, Edward L. Hull, and Thomas H. Foster, "Design and testing of a white-light, steady-state diffuse reflectance spectrometer for determination of optical properties of highly scattering systems," Optical Society of America, 1997. January 1, Applied Optics Vol. 36, No.1, pp. 93-104 Mitsuhiro Masano, Yoshie Muramatsu, Masaharu Yuasa, "Development and Application of Optical Properties Measurement Method for Skin Surface", Japan Cosmetic Engineers Association, Cosmetics Magazine, 1982, Vol. 16, No. 1, p.15 -18

As described above, there has been a conventional method for measuring skin reflection, but the problem is that there is no device for measuring the degree of transparency, which is an important index of skin. Therefore, in the past, for example, by increasing the number of purple colors (blue, etc.) to give a more transparent feeling, there was a method such as trying to solve the problem with a provisional appearance, deviating from the basic research that brings about the original transparency (transparency). It has been taken. In the future, the essential research of measuring actual transparency will become important.

On the other hand, with regard to reflection measurement, unlike the current colorimeters, it is considered that a measuring instrument capable of acquiring data considering the difference in the angle of the illumination light will be required. Therefore, these will be an important group of measuring instruments for the cosmetics industry in the future and for consumers who use them.

Therefore, if we can measure the parameters of reflection and transmission, and the appearance of the skin with high accuracy, we can develop cosmetics by advanced measurement without blurring the measurement target, and we can provide high quality cosmetics to consumers. become.

In the case of the TRS method described in Non-Patent Document 1 and Non-Patent Document 2, it is difficult to construct a circuit system for accurately measuring the time difference from incident to exit, and it takes time for optical setup. There was a problem.

The phase difference method described in Non-Patent Document 3 was developed as a method for avoiding the problems of Non-Patent Document 1 and Non-Patent Document 2. However, in these methods, it is necessary to create a light source that emits light having a steep temporal peak (1 to several picoseconds or less). Further, in the phase difference, since it is necessary to produce short pulse continuous light (eg, 70 to 200 MHz, etc.), it is necessary to use a monochromatic light source such as a laser diode (LD) as a light source, and as a result, a certain arbitrary light source is used. There is a problem that light of the same wavelength can only give a difference of several wavelengths even if there are a plurality of wavelengths, and there is a problem that a continuous long wavelength range cannot be measured at the same time.

The SRS described in Non-Patent Document 4 has been developed as a method for avoiding the problems of the above-mentioned phase difference method. Non-Patent Document 4 describes a theory of investigating a substance inside a sample by using spatial information with broad white light as a light source and using the difference in distance between incident and exit. However, Non-Patent Document 4 is mainly a theoretical explanation, and there is no description of a specific device for the measurement target, and there is no description regarding the measurement of the transparency of the skin surface.

Further, since the devices described in Patent Document 1 and Non-Patent Document 5 can measure only the attenuation of light with a certain distance, the scattering coefficient cannot be calculated, and therefore, it can be used as an index showing transparency. Was unsuitable.

Further, the conventional goniometer is a device that receives reflected light, but the light receiving side is a device that receives light at a different angle by a mechanism that changes the angle, and is a large device. Therefore, there is a problem that the sample has to be greatly changed, such as cutting the sample and mounting it in the sample chamber. For example, there remains a problem that measurement of human skin is unsuitable.

In view of the above problems, it is an object of the present invention to provide a characteristic measurement system and method capable of measuring more accurate characteristics by performing analysis based on imaging by a spectroscopic imaging unit using a plurality of fibers on the light receiving side. And.

In order to achieve the above object, one of the typical optical characteristic measurement systems of the present invention is a spectroscopic imaging unit which is an aberration-free spectroscope and has an optical sensor, and an incident in which one is connected to a light source and emits light from the other. The optical fiber, a plurality of outgoing fibers connected to the spectroscopic imaging unit and receiving light from the other, and a processing device are provided, and the incident fiber and the other tip of the outgoing fiber are objects to be measured. The spectroscopic imaging unit is configured so as to be applied perpendicularly to the surface, and the other tip positions of the plurality of exit fibers are arranged at different distances from the tip positions of the incident fibers. , A first combined convex lens, a first prism, a grating, a second prism, and a second combined convex lens, and one of the plurality of the emitting fibers is arranged in the lateral direction and the spectroscopy is performed. Connected to the imaging unit, the spectroscopic imaging unit uses the light obtained from the plurality of emitting fibers to be subjected to the first combination convex lens, the first prism, the grating, and the second prism. An image is formed on the optical sensor via the second combination convex lens with the horizontal direction as the spatial axis and the vertical direction as the wavelength axis, and the processing apparatus obtains transmission characteristics based on the imaging result obtained by the optical sensor. It is characterized by calculating.

Further, in one of the characteristic measurement systems using light of the present invention, the incident fiber and the other tip portion of the outgoing fiber are inserted into a hole provided in a reinforcing portion or a fiber fixing portion and formed linearly. It is characterized by being.
Further, one of the characteristic measurement systems using light of the present invention is characterized in that the processing device calculates transparency by using the imaging result by the optical sensor and the Y function of the color matching function.
Further, one of the optical characteristic measurement systems of the present invention includes a plurality of the incident fibers, and from the other tip of the plurality of incident fibers, the other tip of the plurality of exit fibers is provided at the same distance. It is characterized by arranging each.

Further, one of the characteristic measurement systems using light of the present invention is a spectroscopic imaging unit which is an aberration-free spectroscope and has an optical sensor, an incident fiber in which one is connected to a light source and emits light from the other, and one is the prism. A plurality of emitting fibers connected to an imaging unit and receiving light from the other and a processing device are provided, and the other tip of the incident fiber is separated from the measurement center on the surface of the object to be measured by a certain distance. It is arranged so as to emit light at a certain angle from the position, and the other tips of the plurality of emitting fibers are arranged so that the reflected light can be received at different angles at a position separated from the measurement center by a certain distance. The spectroscopic imaging unit includes a first combination convex lens, a first prism, a grating, a second prism, and a second combination convex lens, and one of the plurality of emission fibers is lateral. Connected to the spectroscopic imaging unit side by side in the direction, the spectroscopic imaging unit directs light obtained from the plurality of emitting fibers to the first combination convex lens, the first prism, the grating, and the light. An image is formed on the optical sensor via the second prism and the second combination convex lens with the horizontal direction as the spatial axis and the vertical direction as the wavelength axis, and the processing apparatus obtains an imaging result obtained by the optical sensor. It is characterized in that the reflection characteristic is calculated based on.

Further, in one of the characteristic measurement systems using light of the present invention, the incident fiber and the other tip portion of the outgoing fiber are inserted into a hole provided in a reinforcing portion or a fiber fixing portion and formed linearly. It is characterized by being.

Further, one of the characteristic measurement systems using light of the present invention is a spectroscopic imaging unit which is an aberration-free spectroscope and has an optical sensor, and one is a transmission incident fiber in which one is connected to a light source and emits light from the other. A plurality of transmission emitting fibers connected to the spectral imaging unit and receiving light from the other, a reflecting incident fiber connected to a light source and emitting light from the other, and one connected to the spectral imaging unit and the other. A plurality of reflecting exit fibers that receive light from the light are provided, and a processing device is provided so that the other tip of the transmission incident fiber and the transmission exit fiber is applied perpendicularly to the surface of the object to be measured. The other tip positions of the plurality of transmission exit fibers are arranged at different distances from the other tip positions of the transmission incident fiber, and the other tip position of the reflection incident fiber is arranged. The tip of the light is arranged so as to emit light at a certain angle from a position separated by a certain distance from the measurement center on the surface of the object to be measured, and the other tip of the plurality of the reflecting emission fibers is the measurement. The reflected light is arranged so that the reflected light can be received at different angles at a certain distance from the center, and the measurement center is arranged between the transmission incident fiber and the transmission exit fiber, and the spectral imaging is performed. The unit forms an image of the light obtained from the plurality of the transmission exit fibers and the reflection emission fiber on the optical sensor, and the processing device transmits and transmits based on the imaging result obtained by the optical sensor. It is characterized by calculating the reflection characteristics.

Further, one of the characteristic measurement systems using light of the present invention is characterized in that a prism is used at the other end of the transmissive incident fiber.

Further, one of the light-based characteristic measurement methods of the present invention is a spectroscopic imaging unit which is an aberration-free spectroscope and has an optical sensor, an incident fiber in which one is connected to a light source and emits light from the other, and one is the spectroscopy. This is a light-based characteristic measurement method using a plurality of emitting fibers connected to an imaging unit and receiving light from the other and a processing device, in which the other tip of the incident fiber is perpendicular to the surface of the object to be measured. The step of emitting light by hitting the light and the other tips of the plurality of emitting fibers hit perpendicularly to the surface of the object to be measured receive light at different distances with respect to the position of the other tip of the incident fiber. The transmission characteristics are determined based on the step, the step of forming the light obtained from the plurality of emitting fibers on the optical sensor by the spectroscopic imaging unit, and the imaging result obtained by the optical sensor by the processing device. It is characterized by having a step to calculate.

Further, one of the light-based characteristic measurement methods of the present invention is a spectroscopic imaging unit which is an aberration-free spectroscope and has an optical sensor, an incident fiber in which one is connected to a light source and emits light from the other, and one is the spectroscopic A light-based characteristic measurement method that uses a plurality of emitting fibers connected to an imaging unit to receive light from the other and a processing device, from the other tip of the incident fiber to the measurement center on the surface of the object to be measured. On the other hand, the step of emitting light at a certain angle from a position separated by a certain distance and the light reflected from the measurement center at the other tip of the plurality of emitting fibers are received at different angles at a position separated by a certain distance. Based on the step, the step of forming the light obtained from the plurality of emitting fibers on the optical sensor by the spectroscopic imaging unit, and the imaging result obtained by the optical sensor by the processing device, the reflection characteristics are obtained. It is characterized by having a step to calculate.

According to the present invention, in a characteristic measurement system or method using light, more accurate characteristics can be measured by analyzing based on imaging by a spectroscopic imaging unit using a plurality of fibers on the light receiving side.

FIG. 1 shows a schematic view of a transmission characteristic measurement system, which is an embodiment of the light characteristic measurement system of the present invention. FIG. 2 is a perspective perspective view showing an example of a spectroscopic imaging unit applied to the transmission characteristic measurement system of FIG. FIG. 3 is a side view showing a first specific example of a measurement portion in a transmission characteristic measurement system according to an embodiment of the light characteristic measurement system of the present invention. FIG. 4 is a bottom view showing a first specific example of a measurement portion in a transmission characteristic measurement system according to an embodiment of the light characteristic measurement system of the present invention. FIG. 5 is a cross-sectional view of a central portion in the width direction cut in the longitudinal direction showing a second specific example of the measurement portion in the transmission characteristic measurement system according to the embodiment of the characteristic measurement system using light of the present invention. FIG. 6 is a bottom view showing a second specific example of the measurement portion in the transmission characteristic measurement system according to the embodiment of the characteristic measurement system using light of the present invention. FIG. 7 is a side view showing a first example of standard value calibration in a transmission characteristic measurement system, which is an embodiment of the light characteristic measurement system of the present invention. FIG. 8 is a side view showing a second example of standard value calibration in a transmission characteristic measurement system, which is an embodiment of the light characteristic measurement system of the present invention. FIG. 9 shows a schematic view of a reflection characteristic measurement system, which is an embodiment of the light characteristic measurement system of the present invention. FIG. 10 shows a measurement example by the reflection characteristic measurement system, which is an embodiment of the light characteristic measurement system of the present invention. FIG. 11 is a cross-sectional view in which the central portion in the width direction showing the first specific example of the measurement portion in the reflection characteristic measurement system according to the embodiment of the characteristic measurement system using light of the present invention is cut in the longitudinal direction. FIG. 12 is a cross-sectional view cut in the width direction at the measurement center showing the first specific example of the measurement portion in the reflection characteristic measurement system according to the embodiment of the characteristic measurement system using light of the present invention. FIG. 13 shows a measuring portion showing a first specific example of a measuring portion in a measuring system for measuring transmission and reflection characteristics, which is an embodiment of the characteristic measuring system using light of the present invention, cut in the longitudinal direction at the center in the width direction. It is a sectional view. FIG. 14 is a plan view showing a first specific example of a measurement portion in a measurement system for measuring transmission and reflection characteristics, which is an embodiment of the light characteristic measurement system of the present invention. FIG. 15 is centered in the width direction of the transmission characteristic measurement portion showing a modification of the first specific example of the measurement portion in the measurement system for measuring transmission and reflection characteristics, which is an embodiment of the light characteristic measurement system of the present invention. It is a cross-sectional view cut in the longitudinal direction in. FIG. 16 is a side view of the reflection characteristic toward the measurement unit, showing a second specific example of the measurement portion in the measurement system for measuring the transmission and reflection characteristics, which is an embodiment of the light characteristic measurement system of the present invention. FIG. 17 is a side view of a transmission characteristic measurement direction showing a second specific example of a measurement portion in a measurement system for measuring transmission and reflection characteristics, which is an embodiment of the light characteristic measurement system of the present invention. FIG. 18 is a plan view showing a second specific example of a measurement portion in a measurement system for measuring transmission and reflection characteristics, which is an embodiment of the light characteristic measurement system of the present invention.

A mode for carrying out the present invention will be described.

(Embodiment of transmission characteristic measurement system)
FIG. 1 shows a schematic view of a transmission characteristic measurement system, which is an embodiment of the light characteristic measurement system of the present invention.

The transmission characteristic measurement system 1 includes a light source 10 for an irradiation fiber, an incident fiber 11, a plurality of emitting fibers 15, a spectroscopic imaging unit 20, and a processing device 30.

The irradiation fiber light source 10 is a light source for supplying light to the incident fiber 11. Transmission characteristics are measured based on this light. As the light source 10 for the irradiation fiber, for example, if an LED is applied, spectroscopy can be performed on the light source side. That is, the wavelength can be limited on the light source side, and the transmission characteristics for that wavelength can be investigated. This makes it possible to investigate the transmission characteristics for each wavelength range on the light source side.

The incident fiber 11 is a single optical fiber, one end of which is connected to the irradiation fiber light source 10, and the other end of which is arranged so as to hit the object to be measured 200. A reinforcing portion 12 is formed on the other end side of the incident fiber 11, and the circumference of the incident fiber 11 is reinforced with a pipe-shaped cylindrical member such as metal. As a result, the incident fiber 11 becomes linear in the reinforcing portion 12, and can be brought into contact with the surface of the object to be measured 200 at a right angle. Further, on the front end side surface, the incident fiber 11 can be polished at the same time as the reinforcing portion 12 to form a flat tip surface.

The exit fiber 15 is a plurality of optical fibers, each of which is arranged so that one end of the fiber 15 abuts on the object to be measured 200. Here, the positions of one ends of the plurality of emitting fibers 15 are arranged so as to be different distances from the contact positions of the incident fibers 11 with respect to the measurement object 200. The other end of the exit fiber 15 is connected to the spectroscopic imaging unit 20. Further, a reinforcing portion 16 is formed on one end side of the emitting fiber 15, and the periphery of the emitting fiber 15 is reinforced with a cylindrical member such as metal. As a result, in the reinforcing portion 16, the emitting fiber 15 becomes linear and can be brought into contact with the surface of the measurement object 200 at a right angle. Further, on the front end side side surface, the reinforcing portion 16 and the exit fiber 15 can be polished at the same time to form a flat tip surface.

Here, as the material of the reinforcing portions 12 and 16, a metal such as aluminum or a resin can be adopted. In particular, a material having a low reflectance is effective because it has little influence on the measurement. For example, a metal material that has been subjected to black alumite plating, low-temperature chrome plating, or the like, a resin that absorbs light, or the like can be used.

The incident fiber 11 can be a quartz fiber or a multi-component fiber. Further, the exit fiber 15 can be a quartz fiber or a multi-component fiber. As a combination at this time, a multi-component fiber can be selected as the incident fiber 11 and a quartz fiber can be selected as the outgoing fiber 15. Further, the thicknesses of the incident fiber 11 and the outgoing fiber 15 may be the same or different.

In the example of FIG. 1, six examples of the exit fiber 15 are shown by 15a, 15b, 15c, 15d, 15e, and 15f. These are arranged in a line in the order of the exit fibers 15a, 15b, 15c, 15d, 15e, 15f from the contact position of the incident fiber 11 with respect to the measurement object 200. _{That is, different distances r 1} , r from the contact position of the incident fiber 11 with respect to the measurement object 200 to the contact position of the exit fibers 15a, 15b, 15c, 15d, 15e, 15f with respect to the measurement object 200, respectively. ₂ , r ₃ , r ₄ , r ₅ , and r ₆ increase in this order. At this time, the measurement target position 201 of the transmission characteristic is between the contact position of the incident fiber 11 with respect to the measurement target 200 and the contact position of the exit fiber 15 with respect to the measurement target 200.

The processing device 30 is a device that is connected to the spectroscopic imaging unit 20 via a connecting line 31 and can perform calculations related to transmission characteristics such as transparency. For example, any mechanism that can process data, such as a personal computer, can be applied. The connection line 31 may be a cable such as a USB cable that can transfer the captured image. It is also possible to integrate the processing device 30 with the spectroscopic imaging unit 20.

FIG. 2 is a perspective view showing an example of a spectroscopic imaging unit applied to the transmission characteristic measurement system of FIG. FIG. 2 is a perspective perspective view so that the inside can be seen.

The spectroscopic imaging unit 20 is connected to a plurality of ejection fibers 15, and is provided with a combination convex lens 21, a prism 22, a grating 23, a prism 24, a combination convex lens 25, and an optical sensor 26 in this order in the longitudinal direction. It is a spectroscope.

The plurality of emitting fibers 15 are connected to the spectroscopic imaging unit 20 side by side in the lateral direction. In the prism 22, the vertical surface 22b is arranged on the grating 23 side, and the inclined surface 22a is arranged on the combined convex lens 21 side. In the prism 24, the vertical surface 24b is arranged on the grating 23 side, and the inclined surface 24a is arranged on the combined convex lens 25 side. The prisms 22 and 24 are prisms for angle correction. The grating 23 is a grating for wavelength dispersion. The optical sensor 26 is a two-dimensional optical sensor. For example, a monochrome camera made of silicon or InGaAs, such as a CCD camera or CMOS, can be applied.

Here, the light input from the exit fiber 15 is imaged on the optical sensor 26 through the combination convex lens 21, the prism 22, the grating 23, the prism 24, and the combination convex lens 25. In the image formation here, the horizontal direction is the spatial axis and the vertical direction is the wavelength axis.

Therefore, the spectroscopic imaging unit 20 stores the spatial information, while the energy information is decomposed for each wavelength. One is in the form of a spatial axis and the other is in the form of a wavelength axis, which converges on a two-dimensional sensor which is an optical sensor 26. Since the spatial information about the fiber incident point by the incident fiber 11 is stored in the spectroscopic imaging unit 20, the wavelength-dispersed signal is directly transmitted along the difference in the distance between the incident on the measurement object 200 and the emission. It will be possible to detect.

The information acquired by the optical sensor 26 of the spectroscopic imaging unit 20 is transmitted to the processing device 30. The processing device 30 receives this information and calculates the transparency characteristics such as transparency.

The calculation of transparency measurement will be described.

Using a plurality of emitting fibers 15, it is possible to solve the absorption coefficient (μa) and the scattering coefficient (μsd) of all wavelengths from the light intensity (R) in which the distance between measurements (r) is changed. Specifically, by formulating and solving simultaneous equations using the diffusion equations shown below, the scattering coefficients (μa) and scattering coefficients (μsd) of all wavelengths are solved as unknowns so as to match each light intensity. ..

…（式１）

… (Equation 1)

…（式２）

…（式３）

…（式４）

…（式５）
Here, the definition of the constant used in Equation 1 is as follows.

… (Equation 2)

… (Equation 3)

… (Equation 4)

… (Equation 5)

Here, ua is the absorption coefficient. usd is the scattering coefficient. z0 is the average scattering distance. ρ is the inter-measurement distance including the average scattering distance. μeff is an effective damping coefficient. D is the diffusion coefficient.

Further, r is the distance from the above-mentioned contact position of the tip of the incident fiber 11 with respect to the measurement object 200 to the contact position of the tips of the plurality of exit fibers 15 with respect to the measurement object 200. Further, R is a light intensity, which can be obtained from the imaging result of the spectroscopic imaging unit 20 described with reference to FIG. Here, the light intensity R is calculated for each distance (r). As a result, if the values of the light intensities R for a plurality of distances (r) are obtained, the above-mentioned simultaneous equations can be solved, and the scattering coefficient (μa) and the scattering coefficient (μsd) for all wavelengths can be solved. The larger the number of distances (r), the more accurate the value can be calculated. In the example of FIG. 1, the light intensity R is measured at six _{distances r 1} , r ₂ , r ₃ , r ₄ , r ₅ , and r _{6, respectively.} The number of distances (r) may be 2 or more, and an accurate scattering coefficient (μa) and scattering coefficient (μsd) can be obtained each time the number is increased to 3 or more, 5 or more, and 6 or more.

Of the above two parameters, the absorption coefficient (μa) and the scattering coefficient (μsd), the scattering coefficient (μsd) can be used to obtain, for example, a value proportional to the transparency of the sample. , Transparency is calculated from this property.

The calculated scattering coefficient (μa) and scattering coefficient (μsd) have values for each wavelength. In order to obtain one parameter of transparency from these, the Y function (y (λ)) of the color matching function, which is equivalent to that of the human eye, is used.

…（式６）
For example, when the measurement range is 380 to 780 nm, the following formula is used.

… (Equation 6)

Here, SanranY indicates a degree of scattering that matches the visual observation. Further, K1 is a coefficient for fine adjustment.

…（式７）
Since the transparency may be the reciprocal of the scattering degree, the formula shown below is used.

… (Equation 7)

Here, ToumeiY is transparency. K2 is a coefficient for fine adjustment.

…（式８）
Further, the wavelength range can be appropriately selected. For example, in the case of only the central portion (503 to 637 nm), the formula for obtaining the degree of scattering is as follows.

… (Equation 8)

Here, K3 is a coefficient for fine adjustment.

It is not necessary to be strictly concerned with the Y value of the color matching function (all wavelengths), and it is sufficient to visually check each other. Therefore, it suffices to experimentally correlate with human eyes, and there is no problem even if the value has an arbitrary bandpass width and is 530 nm. The reciprocal of the scattering degree of the obtained sample is directly proportional to the transparency of the sample. In the above-described embodiment, the wavelength is shown in a specific range, but the wavelength range is not limited to this, and various wavelength ranges can be applied depending on the material of the object to be measured.

In the above, it has been described that the transparency (ToumeiY) is obtained from the scattering coefficient (μa). Also, if the other absorption coefficient (μa) is known, it can be considered as the sum (mixture) of the absorption coefficient * concentration of each substance. Therefore, the following addition theorem holds, and the amount of each component can be solved. it can.

Here, instead of the absorption coefficient (μa) for each wavelength shown above, the explanation is added with the spectrum S. Assuming that the mixture spectrum is sampled into N samples at equal wavelength intervals, the spectrum of this mixture is represented by an N-dimensional vector x having _{the absorbances x 1} , x ₂ , x ₃ , ... x _{N of each wavelength as elements.} To do. Similarly, the spectra per unit of M components are represented as S ₁ , S ₂ , S ₃ , ... _SM , respectively. The M standard spectra can be collectively represented by the N * M matrix S = (S ₁ , S ₂ , ... _SM ).

The amounts of the components constituting the mixture are c ₁ , c ₂ , ... c _M , and these are collectively represented by the M-dimensional vector c = (c ₁ , c ₂ , ... c _M ) t. However, t means transposition. Here, the mixture vector x has the following relationship using the component spectrum Si and the component amount ci.
x = c ₁ s ₁ + c ₂ s ₂ + ... + c _M s _M
= Sc
… (Equation 9)

In this equation, the component spectrum S may be known, and the component amount c may be obtained from the measurement data x.

This method minimizes the squared norm, that is, Q expressed by the following equation, with respect to the residual vector x-Sc of the spectrum Sc created by the estimated component amount c and the measured mixed spectrum x. It is to obtain the component amount c by the directionality implementation.
Q = | x − Sc | ²
… (Equation 10)

Therefore, as a result, it is synonymous with the fact that the minute change amount of Q when a minute change is given, that is, the partial differential coefficient shown below should be close to the minimum value, 0. That is,
dQ / dc ₁ = 0 dQ / dc ₂ = 0 dQ / dc ₃ = 0
… (Equation 11)
Is synonymous with solving, and the result is, as a result.
c = ( ^St · S) ^{-1 St} · x
… (Equation 12)
Just solve.

From this equation, if the measurement mixture spectrum x is given to the spectrum S, the estimated component amount c can be obtained. This is generally a method of solving the least squares method, and basically it can be solved if the absorption coefficient spectrum of the target and the absorption coefficient (μa) of each component in a certain amount are known. ..

In addition to this, there are already known techniques for quantifying each component from the mixture, but other solutions are omitted.

(First specific example of the measurement part of the transmission characteristic measurement system)
FIG. 3 is a side view showing a first specific example of a measurement portion in a transmission characteristic measurement system according to an embodiment of the light characteristic measurement system of the present invention. FIG. 4 is a bottom view showing a first specific example of a measurement portion in a transmission characteristic measurement system according to an embodiment of the light characteristic measurement system of the present invention.

In the first specific example of the measurement portion of the transmission characteristic measurement system, as shown in FIGS. 3 and 4, the direction (vertical direction) and the direction perpendicular to the direction (longitudinal direction) connecting the incident fiber 11 and the outgoing fiber 15 (horizontal direction). ), The configuration including the plurality of incident fibers 11 and the outgoing fibers 15 will be described.

In addition to the incident fiber 11 and the outgoing fiber 15, the transmission measuring unit 40 includes one incident side block 41, a spacer 43, and a plurality (six) outgoing side blocks 42.

The incident side block 41 has a rectangular parallelepiped shape with the lateral direction as the longitudinal direction. Then, the incident side block 41 has six holes arranged in the horizontal direction vertically penetrating vertically, and six incident fibers 11 are inserted therein. The tip end side of the incident fiber 11 substantially coincides with the lower end surface of the incident side block 41, and serves as a place where light is emitted.

The exit side block 42 has a rectangular parallelepiped shape with the lateral direction as the longitudinal direction. Then, near the center of the exit side block 42 in the vertical direction, six holes arranged in the horizontal direction vertically penetrate vertically, and six exit fibers 15 are inserted therein. The tip end side of the emission fiber 15 substantially coincides with the lower end surface of the emission side block 42, and serves as a place where light enters.

Six emission side blocks 42 are arranged side by side with their side surfaces in contact with each other in the vertical direction. Six emission fibers 15a, 15b, 15c, 15d, 15e, and 15f are inserted into each emission side block 42 in the lateral direction. Therefore, in the examples of FIGS. 3 and 4, a total of 36 exit fibers 15 are used.

In the examples of FIGS. 3 and 4, the lateral holes of the incident side block 41 and the outgoing side block 42 are arranged at equal intervals, and the corresponding lateral positions are arranged at the same positions. Further, in the emission side blocks 42, the distances between the holes in the emission side blocks 42 adjacent to each other in the vertical direction are the same.

The spacer 43 has a rectangular parallelepiped shape and is arranged between the incident side block 41 and the exit side block 42 closest to the incident side block 41. That is, one side surface of the spacer 43 abuts on one side surface of the incident side block 41, and the other side surface abuts on one side surface of the exit side block 42. As a result, the incident side block 41, the spacer 43, and the outgoing side block 42 are configured in this order, and a plurality of outgoing side blocks 42 are arranged side by side. The vertical distance of the spacer 43 is determined within the range to be measured.

Here, as the material of the incident side block 41, the spacer 43, and the outgoing side block 42, a metal such as aluminum or a resin can be adopted. In particular, a material having a low reflectance is effective because it has little influence on the measurement. For example, a metal material that has been subjected to black alumite plating, low-temperature chrome plating, or the like, a resin that absorbs light, or the like can be used. At this time, the incident fiber 11 and the emitting fiber 15 can be polished at the same time as the incident side block 41 to form a flat lower end surface.

With this configuration, light is emitted from the six incident fibers 11 arranged in the horizontal direction, and the distances from the incident fibers 11 are r ₁ , r ₂ , r ₃ , r ₄ , r ₅ , and r _6. It is possible to measure the transmission characteristics such as transparency more accurately by reducing the SN by inputting light from the emission fiber 15 at each of 6 points.

(Second specific example of the measurement part of the transmission characteristic measurement system)
FIG. 5 is a cross-sectional view of a central portion in the width direction cut in the longitudinal direction showing a second specific example of the measurement portion in the transmission characteristic measurement system according to the embodiment of the characteristic measurement system using light of the present invention. FIG. 6 is a bottom view showing a second specific example of the measurement portion in the transmission characteristic measurement system according to the embodiment of the characteristic measurement system using light of the present invention.

The transmission measuring unit 50 includes a fiber fixing portion 51, a base portion 52, an outer frame 53, a cylindrical fixing portion 54, a cylindrical portion 55, and a connecting portion 56, and an incident fiber 11 and an outgoing fiber 15 are arranged therein. Has been done. Here, the longitudinal direction of the transmission measuring unit 50 is defined as the left-right direction in FIG. 5, and the direction orthogonal to the longitudinal direction is defined as the width direction.

The fiber fixing portion 51 has a plurality of holes that penetrate vertically in the vertical direction. This hole can be configured in the same manner as the arrangement of the holes in the incident side block 41 and the outgoing side block 42 described with reference to FIGS. 3 and 4. That is, it has a plurality of (five) holes for inserting the incident fibers 11 arranged in the width direction. Further, it has a plurality (five) holes arranged in the width direction at six locations having different distances in the longitudinal direction from the holes. These 30 holes serve as holes for the exit fiber 15 (15a, 15b, 15c, 15d, 15e, 15f).

Here, the fiber fixing portion 51 can be applied as one block having a flat lower surface, and as a material, a metal such as aluminum or a resin can be adopted. In particular, a material having a low reflectance is effective because it has little influence on the measurement. For example, a metal material that has been subjected to black alumite plating, low-temperature chrome plating, or the like, a resin that absorbs light, or the like can be used.

Further, the fiber fixing portion 51 may have a configuration in which the incident side block 41, the exit side block 42, and the spacer 43 described with reference to FIGS. 3 and 4 are combined in addition to one block.

The fiber fixing portion 51 is fixed to the base portion 52 on the lower side of the periphery, and a cylindrical fixing portion 54 is provided on the upper side near the end portion of the base portion 52, and the cylindrical portion 55 is fixed there. Further, an outer frame 53 is provided on the upper portion of the base portion 52, and an incident fiber 11 and an outgoing fiber 15 are provided inside the outer frame 53.

The incident fiber 11 and the outgoing fiber 15 are inserted into each hole of the fiber fixing portion 51 from the upper part, and the tip portion coincides with the lower end portion of the fiber fixing portion 51. At this time, the incident fiber 11 and the outgoing fiber 15 can be polished at the same time as the fiber fixing portion 51 to form a flat lower end surface. At the lower end, the distance from the incident fiber 11 increases in the order of the outgoing fibers 15a, 15b, 15c, 15d, 15e, and 15f.

The cylindrical portion 55 is arranged parallel to the longitudinal direction, one end is arranged inside the outer frame 53, and the other end is arranged outside the outer frame 53, and is connected to the connecting portion 56. Here, the incident fiber 11 and the outgoing fiber 15 are transferred from the inside of the outer frame 53 to the irradiation fiber light source 10 via the cylindrical portion 55 and the connecting portion 56, and the outgoing fiber 15 It is connected to the spectroscopic imaging unit 20.

The measurer applies the lower end of the fiber fixing portion 51 to the surface of the object to be measured to perform the measurement. At this time, the position is adjusted so as to be the measurement target position between the tip of the incident fiber 11 and the tip of the exit fiber 15. This makes it possible to investigate transmission characteristics such as transparency. Further, since a plurality of incident fibers 11 and outgoing fibers 15 are arranged in the lateral direction, more accurate measurement can be performed.

(First example of standard value calibration of transmission characteristic measurement system)
FIG. 7 is a side view showing a first example of standard value calibration in a transmission characteristic measurement system, which is an embodiment of the light characteristic measurement system of the present invention.

In this example, the lower end side of the incident side block 41 and the lower end side of the exit side block 42 shown in FIGS. At this time, the positions of the holes of the incident side block 41 and the positions of the holes of the exit side block 42 arranged in the horizontal direction are aligned with each other. As a result, the tip positions of the incident fiber 11 and the outgoing fiber 15 are aligned. Here, the tips of the incident fiber 11 and the outgoing fiber 15 are in contact with each other (optical contact).

Light is incident on the incident fiber 11 from the light source 61 through the ND filter 62. Then, the light is transmitted to the exit fiber 15, and is sent from the exit fiber 15 to the spectroscopic imaging unit 20. The standard value can be calibrated based on the result at this time.

By making optical contact between the irradiation fiber and the light receiving side fiber in this way, a more accurate reference light amount can be obtained, and 100% transmittance calibration can be performed.

(Second example of standard value calibration of transmission characteristic measurement system)
FIG. 8 is a side view showing a second example of standard value calibration in a transmission characteristic measurement system, which is an embodiment of the light characteristic measurement system of the present invention.

In this example, the tip of the incident fiber 11 and the tip of the emitting fiber 15 are applied perpendicularly to the surface of the reference member 65. As the reference member 65, a material having a constant scattering coefficient can be applied. The scattering coefficient is, for example, preferably about 0.5 to 1.5. Specifically, opal glass, a white resin material, or the like can be applied.

The light from the incident fiber 11 is transmitted to the exit fiber 15 via the reference member 65, and is sent from the exit fiber 15 to the spectroscopic imaging unit 20. The standard value can be calibrated based on the result at this time.

In this way, the reference light amount can be obtained by using the reference member 65, and 100% transmittance calibration can be performed. Further, in this method, since the transmission measuring units 40 and 50 shown in FIGS. 3 to 6 may be directly applied to the reference member 65, the standard value can be calibrated without disassembling the product.

Further, the examples of standard value calibration shown in FIGS. 7 and 8 can be used in combination. For example, in the first example of standard value calibration in FIG. 7, the standard value calibration is performed in a factory, and in the second example of standard value calibration in FIG. 8, after the product is sold, during actual measurement, etc. Standard value calibration may be performed. In this way, it is possible to calibrate the standard value more accurately than the two calibrations.

(Example of measurement application by transmission characteristic measurement system)
A specific application example of the above-mentioned transmission characteristic measurement system will be described.

When the above transmission characteristic measurement system is used on the skin, transparency and transparency can be measured. As described above, the diffusion equation can be solved from the transmission information captured at different distances and the parameters of the distance interval, and can be divided into absorption and scattering coefficients, and transparency can be obtained directly from the scattering coefficients. It will be possible. Transparency is currently an important parameter for skin evaluation, but there has been no way to measure it properly. INDUSTRIAL APPLICABILITY According to the present invention, evaluation can be performed with high accuracy.

In addition, since it is possible to measure the permeability of the skin, it is possible to calculate the color using the transmittance of the skin. Together with the parameters of the reflected light described below, it becomes possible to accurately capture the information of the translucent body, and it becomes possible to investigate the characteristics related to the color of the skin more precisely. Furthermore, the absorption coefficient of the target derived from the measured value using the diffusion equation enables quantitative calculation of the substance existing in the skin. For example, it becomes possible to quantify oxidized hemoglobin, reduced hemoglobin, melanin and the like.

The present invention can also be applied to foods. According to the present invention, most translucent samples can be measured. For example, food evaluation becomes possible. The present invention can be applied not only to the measurement of transparency by visible light but also to the measurement of transparency by near infrared light. At this time, the Y function may be obtained experimentally, or a transparent function may be created from the correlated wavelengths. If not only visible light but also light in the wavelength range of near infrared light (for example, 600-1100 nm, 1000-2500 nm, etc.) is used, in addition to the spectral information derived from the dye component that becomes clear in the visible range, Spectral information derived from near-infrared absorption worthy of 2 to 8 harmonics of molecular vibration caused by infrared light can be captured. Therefore, if the substance in the food, for example, the sample is a fruit, it is possible to quantify not only the sugar component such as glucose and fructose but also the substance derived from the acid component such as malic acid.

In particular, in the case of processed components such as fruits, grains, and other processed components such as bread, the internal components can be measured non-destructively. In the conventional method, it is common to take a log from the transmittance, replace it with an absorbance, convert it to its second derivative, and then quantify it using a statistical calculation method such as multiple regression calculation. there were. In that case, the meaning of the acquired spectrum could not be fully understood because it was only possible to investigate by converting the transmittance into the degree of absorption. That is, for example, it is possible to investigate the difference in the degree of absorption of the spectrum due to the absorption of the basic component or the increase in the scattering coefficient due to the difference in the material structure, and the degree of synthesis thereof. It wasn't done. However, in the present invention, by changing the incident and light receiving distances, it is possible to investigate the amount of transmitted light that matches the distances, and as a result, it is divided into an absorption coefficient and a scattering coefficient. That is, it is possible to determine whether the difference in spectrum is due to the difference in tissue or the difference in the amount of substance in the tissue.

Therefore, for example, it has become possible to improve the quantification accuracy of internal components by non-destructive inspection using near infrared light. At the same time, since only the scattering coefficient can be extracted, the structure itself can be evaluated. For example, in the case of judging fruit (pear), it is the judgment of water core fruit called water pear or normal fruit, and in the case of apple, whether it is apple with honey or not, and the degree of ripeness of persimmon. I understand. Furthermore, in addition to fruits and grains, it is effective for evaluating dairy products such as yogurt and translucent foods such as ice cream.

Furthermore, the present invention can also be applied to industrial products. Any industrial product or any translucent sample can be used. For example, the range of application is the measurement of soap, plastic materials, etc., and it is possible to evaluate soap, plastic materials (particularly milky white), and the like.

(Embodiment of Reflection Characteristic Measurement System)
FIG. 9 shows a schematic view of a reflection characteristic measurement system, which is an embodiment of the light characteristic measurement system of the present invention. The same parts as those in the embodiment of the transmission characteristic measurement system described with reference to FIGS. 1 and 2 are designated by the same reference numerals, and the description thereof is partially omitted.

The reflection characteristic measurement system 2 includes a light source 10 for an irradiation fiber, an incident fiber 71, a fiber fixing portion 73, a plurality of emitting fibers 75, a spectroscopic imaging unit 20, and a processing device 30.

The irradiation fiber light source 10 is the same as that of the transmission characteristic measurement system described with reference to FIG. The reflection characteristics can be investigated based on this light.

The incident fiber 71 is a single optical fiber, one end of which is connected to the irradiation fiber light source 10, and the other end of which shines light on the object to be measured 200 from a position separated by a certain distance from a specific angle. It is fixed to the fiber fixing portion 73 as described above. At this time, a reinforcing portion 72 is formed on the other end side of the incident fiber 71, and the circumference of the incident fiber 71 is reinforced with a pipe-shaped cylindrical member such as metal. As a result, the incident fiber 71 becomes linear in the portion of the reinforcing portion 72 near the portion where light is emitted. Further, on the front end side surface, the incident fiber 71 can be polished at the same time as the reinforcing portion 72 to form a flat tip surface.

The exit fiber 75 is a plurality of optical fibers, each of which is fixed to the fiber fixing portion 73 so that light can be received from a position separated from a specific angle by a certain distance from the measurement object 200. The specific angles here are all different for each of the emitting fibers 75, and may be arranged so that light can be received at regular intervals. The other end of the exit fiber 75 is connected to the spectroscopic imaging unit 20. Further, a reinforcing portion 76 is formed on one end side of the emitting fiber 75, and the periphery of the emitting fiber 75 is reinforced with a cylindrical member such as metal. As a result, the exit fiber 75 becomes linear in the portion of the reinforcing portion 76 near the portion that receives light. Further, on the front end side surface, the reinforcing portion 76 and the exit fiber 75 can be polished at the same time to form a flat tip surface.

The fiber fixing portion 73 is a semicircular member obtained by cutting a cylinder in half, and has a constant thickness in the width direction. The inner arc portion 73a is formed with a radius d centered on the measurement target position 201. The thickness t of the cylinder is formed with a thickness as required. In the fiber fixing portion 73, straight holes radially centering on the measurement target position 201 penetrate from the inner arc portion 73a to the outer arc portion 73b. The incident fiber 71 and the outgoing fiber 75 are inserted here together with the reinforcing portions 72 and 76. Then, the tips of the incident fiber 71 and the outgoing fiber 75 are arranged so as to be located on the inner surface of the arc portion 73a.

In the example of FIG. 9, the incident fiber 71 illuminates the measurement target position 201 at the incident angle α. Then, the exit fiber 75 can receive light reflected from a plurality of angles centered on the measurement target position 201 in the same vertical plane as the incident angle α. In FIG. 9, the reflected light is acquired in the range on the right side of FIG. 9, but the incident fiber 71 may be provided up to the left side by increasing the number of receiving angles.

Convex lenses may be provided at the tips of the incident fiber 71 and the outgoing fiber 75. The tip of a normal fiber spreads light within a certain range (for example, in the case of a multimode quartz fiber, the opening angle is about 15 ° to about 30 °), or receives light in this range. To do. Here, by providing a convex lens at the tip of the fiber, it becomes possible to deal with parallel light. That is, it is possible to emit parallel light without spreading from the tip of the incident fiber 71, and the emitting fiber 75 can receive parallel light without spreading from the tip.

Further, instead of using the reinforcing portions 72 and 76, the fiber fixing portion 73 may be provided with holes for the incident fiber 71 and the outgoing fiber 75 and directly inserted. This hole also radially penetrates from the inner arc portion 73a to the outer arc portion 73b centering on the measurement target position 201. Also in this case, the tips of the incident fiber 71 and the outgoing fiber 75 are arranged so as to be located on the inner surface of the arc portion 73a.

The incident fiber 71 may be a quartz fiber or a multi-component fiber. Further, the exit fiber 75 may be a quartz fiber or a multi-component fiber. As a combination at this time, a multi-component fiber can be selected as the incident fiber 71, and a quartz fiber can be selected as the outgoing fiber 75. Further, the thickness of the incident fiber 71 and the outgoing fiber 75 may be the same or different. In the same case, the holes of the reinforcing portions 72 and 76 or the fiber fixing portion 73 can be shared, and the angle between the incident fiber 71 and the outgoing fiber 75 can be selected in a wide range.

Further, as the material of the fiber fixing portion 73 and the reinforcing portions 72 and 76, a metal such as aluminum or a resin can be adopted. In particular, a material having a low reflectance is effective because it has little influence on the measurement. For example, a metal material that has been subjected to black alumite plating, low-temperature chrome plating, or the like, a resin that absorbs light, or the like can be used.

The spectroscopic imaging unit 20 has the configuration described with reference to FIG. The light input from the exit fiber 75 is imaged on the optical sensor 26 through the combination convex lens 21, the prism 22, the grating 23, the prism 24, and the combination convex lens 25. In the image formation here, the horizontal direction is the spatial axis and the vertical direction is the wavelength axis. Then, the information acquired by the optical sensor 26 of the spectroscopic imaging unit 20 is transmitted to the processing device 30 via the connection line 31. The processing device 30 receives this information and calculates the reflection characteristic.

As described above, the reflection characteristic measurement system of the present invention uses the incident fiber 71 for illumination to irradiate light from an angle having a certain incident angle α, and for each angle reflected by the sample. The exit fiber 75 is arranged so as to capture the amount of light of. The light incident on each optical fiber is guided by the optical fiber of the exit fiber 75 and guided to the spectroscopic imaging unit 20 (aberration-free spectroscope), and inside the unit, the combined convex lens 21, the prism 22, and the prism 22 An image is formed on the two-dimensional optical sensor 26 through the grating 23, the prism 24, and the combined convex lens 25.

Spatial information is stored by the spectroscopic imaging unit 20, and energy information is decomposed for each wavelength and converged by a two-dimensional optical sensor 26. Since the spatial information of the fiber incident point is stored in the spectroscopic imaging unit 20, as a result, it becomes possible to capture the amount of signals whose wavelength is dispersed for each angle. The reflection characteristic measurement system of the present invention is characterized by having an optical system (goniophotometry) for investigating the angle-dependent reflection characteristics of the sample.

FIG. 10 shows a measurement example by the reflection characteristic measurement system, which is an embodiment of the light characteristic measurement system of the present invention. By using the reflection characteristic measurement system of the present invention, the reflection intensity for each angle can be displayed as shown in FIG. 10, so that it is possible to determine, for example, the degree of rise of the specular reflection component for each angle. From these, it can be determined whether the reflection characteristics of the sample are glossy or, conversely, a matte type (less mirror gloss) sample.

FIG. 10 shows the reflectance of the skin measured separately for the case where there is gloss (gloss) (FIG. 12 (a)) and the case where there is no gloss (FIG. 12 (b)). (A1) to (a3) in the figure are diagrams showing different wavelengths when there is gloss, and (b1) to (b3) are distribution characteristics of reflected energy when different wavelengths are when there is no gloss. Is.

FIG. 10 shows a 45-degree incident (from the left side), and comparing (a1) to (a3) with (b1) to (b3), the reflectance (that is, the mirror surface) under the 45-degree emission condition at any wavelength. Since the reflectance) is higher in the case of gloss ((a1) to (a3)), it is shown that the protrusion is larger only in that part than in the case of no gloss ((b1) to (b3)). Has been done.

For example, conventional base makeup is aimed at hiding color unevenness. Nowadays, ordinary women are beginning to realize that it is important not only to hide with color but also to express the texture. Image words such as transparency, bare skin, shedding, sexyness, and health often appear in makeup magazines. In order to produce these image words, it is necessary to have a skin texture as if the foundation had not been applied, and it cannot be expressed simply by applying the existing foundation evenly. This is because the foundation contains powder, so if you apply it, it will always shift to a matte direction, and it will be far from the skin and natural feeling.

In the future, it will be important to develop foundations that claim that the texture can be manipulated. In fact, recent research has shown that when the reflectance at 600 to 700 nm is increased by 10%, the dullness disappears and the transparency appears. Conventionally, a goniometer has been widely used for the development of the new base material. We make fiber powder (about 20 * 100 microns) with various shapes, measure it with an existing goniometer, find the optimum cross-sectional shape from its spectral shape and light distribution characteristics, and find the world's first foundation. We are developing materials.

The reflection characteristic measurement system of the present invention is a system that can measure directly from the top of the skin after applying the foundation directly to the skin, and this time, it is also possible to apply a human-made material to the face and test it. Is to be.

(Specific example of the measurement part of the transmission characteristic measurement system)
FIG. 11 is a cross-sectional view in which the central portion in the width direction showing the first specific example of the measurement portion in the reflection characteristic measurement system according to the embodiment of the characteristic measurement system using light of the present invention is cut in the longitudinal direction. FIG. 12 is a cross-sectional view cut in the width direction at the measurement center showing the first specific example of the measurement portion in the reflection characteristic measurement system according to the embodiment of the characteristic measurement system using light of the present invention.

The reflection measuring unit 80 includes a fiber fixing portion 81, an outer frame 83, a cylindrical fixing portion 84, a cylindrical portion 85, a connecting portion 86, and a side surface fixing portion 87, and internally includes an incident fiber 71 and a plurality of outgoing fibers. 75 are arranged. Here, the left-right direction of FIG. 11 is the longitudinal direction of the reflection measurement unit 80, and the direction orthogonal to the longitudinal direction is the width direction.

The fiber fixing portion 81 is a semicircular member obtained by cutting a thick cylinder in half and has a constant thickness in the width direction. The inner arc portion 81a is formed with a radius d'centered on the measurement center 88. The thickness t'is formed with a thickness as required. In the fiber fixing portion 81, a straight hole 81c radially centered on the measurement center 88 penetrates from the inner arc portion 81a to the outer arc portion 81b near the center in the width direction. The incident fiber 71 and the outgoing fiber 75 are inserted here. Then, the tips of the incident fiber 71 and the outgoing fiber 75 are arranged so as to be located on the inner surface of the arc portion 81a. Further, a convex lens may be provided at the tips of the incident fiber 71 and the outgoing fiber 75.

In the example of FIG. 10, 59 holes 81c having a central angle of 3 ° are provided in the same vertical plane extending in the longitudinal direction. Therefore, if the hole 81c is a hole into which both the incident fiber 71 and the outgoing fiber 75 can be inserted, one of these holes can be used as the hole for the incident fiber 71, and the other can be used as the hole for the outgoing fiber 75. Can be a hole in. Although the illustration of the exit fiber 75 is omitted in FIG. 10, the exit fiber 75 is inserted into all the holes to check the reflection characteristics at a total of 58 points every 3 °. be able to.

Here, the fiber fixing portion 81 can be applied as one block, and as the material, a metal such as aluminum or a resin can be adopted. In particular, a material having a low reflectance is effective because it has little influence on the measurement. For example, a metal material that has been subjected to black alumite plating, low-temperature chrome plating, or the like, a resin that absorbs light, or the like can be used.

Both sides of the fiber fixing portion 81 are fixed by the side surface fixing portion 87, and the side surface fixing portion 87 is fixed to the inner side surface of the outer frame 83. Inside the outer frame 83, an incident fiber 71 and an outgoing fiber 75 are provided.

The cylindrical portion 85 is arranged parallel to the longitudinal direction, one end is arranged inside the outer frame 83, and the other end is arranged outside the outer frame 83, and is connected to the connecting portion 86. The cylindrical portion 85 is fixed to the outer frame 83 via the side surface fixing portions 87 on both sides. Here, the incident fiber 71 and the outgoing fiber 75 are transferred from the inside of the outer frame 83 through the cylindrical portion 85 and the connecting portion 86, the incident fiber 71 is sent to the irradiation fiber light source 10, and the outgoing fiber 75 is It is connected to the spectroscopic imaging unit 20.

The measurer makes a measurement so that the measurement center 88 at the lower end of the fiber fixing portion 81 is at the measurement target position. As a result, the light from the incident fiber 71 is received by the plurality of emitting fibers 75, and the spectroscopic imaging unit 20 forms an image for analysis, so that the reflection characteristics for each angle can be investigated at once.

The measurement unit of the reflection characteristic measurement system described in FIGS. 9 to 12 changed the angle in the same vertical plane with the measurement target position 201 as the center, and received light from the exit fiber 75. However, these may be hemispherical, for example, and a light receiving surface may be provided three-dimensionally depending on the inner surface shape of the hemisphere. That is, the tip of the exit fiber 75 arranges the inner surfaces of the hemispheres three-dimensionally so that the reflected light can be acquired. This enables more multifaceted measurements.

(Example of measurement application by reflection characteristic measurement system)
A specific application example of the above-mentioned reflection characteristic measurement system will be described.

The reflection characteristic measurement system of the present invention can be used for living body (particularly skin) measurement. By measuring with a constant incident angle and various light receiving angles, for example, in addition to the color information (XYZ, L * a * b *, H * C *) required for skin measurement, glossiness and shine It is possible to derive parameters derived from specular reflection such as sensation. On the contrary, it is possible to derive an index or the like indicating a flat and matte skin-specific bokeh feeling, and to accurately measure the degree of lifting and lowering of the reflection at the boundary from the specular reflection to the flat feeling.

The method of measuring the reflectance for each angle used for this measurement is called goniometer photometry, and until now, a mechanism for gradually changing the incident and light receiving angles has been required. For example, in order to make artificial leather look more authentic, it is necessary to investigate the optical characteristics accurately, and when the genuine leather and its artificial leather are measured and evaluated, the difference is the magnitude of the light reflected at each angle. You can find out by examining in detail. It is a method that has been developed to investigate such a fine appearance, that is, appearance. However, this device is a large-scale device, requires a mechanism for measuring by changing the angle between the light source and the light receiving little by little, and is a method that takes time for scanning.

The method based on the reflection characteristic measurement system of the present invention uses a plurality of ejection fibers 75 and a spectroscopic imaging unit 20 so that the same parameters as goniometers can be measured more easily and quickly by omitting all the moving mechanism parts. , Real-time measurement is possible at once. Therefore, in skin measurement, it is possible to measure with as little burden as possible on the subject. Furthermore, even in the measurement of products, it is necessary to cut out a part of the product and examine the reflection characteristics because the conventional method is a large-scale device. However, in the present invention, since it is possible to directly apply the measuring unit to the product for examination, it is possible to perform a wide range of applications such as discrimination of a fake product based on the reflection characteristics and evaluation of the product.

Further, the method based on the reflection characteristic measurement system of the present invention is also effective for foods. Further, the reflection characteristic measurement system of the present invention can also be used for quality control of industrial products. As mentioned above in the explanation of the skin, since the optical system without a driving part is constructed by simple construction, quality control of various industrial products is possible just by applying the measuring part. For example, goniometers have long been used for material quality inspections because car interior parts must be more authentic at a more stringent cost. A wide range of industrial products such as synthetic leather inspection for dashboards, plastic materials, and fabrics for seats will be measured.

Currently, these data can be expressed on CG. Since the number of cases where the appearance situation is expressed on CG by changing the incident and exit angles will increase in the future, it is effective to easily measure the optical characteristics with this device. Further, the reflection characteristic measurement system of the present invention can be applied not only to foods but also to natural objects such as plants and animals.

(About the system for measuring transmission and reflection characteristics)
As described above, FIGS. 1 to 8 have described the transmission characteristic measurement system, and FIGS. 9 to 12 have described the reflection characteristic measurement system. However, these systems cannot measure the same point at the same time. For example, it is impossible for the transmission measuring unit 50 of FIG. 5 and the reflection measuring unit 80 of FIG. 11 to hit the same location at the same time.

Therefore, if the transmission and reflection measurement units are arranged side by side, the transmission characteristics and the reflection characteristics can be measured at the same time, but the reflection characteristics and the transmission characteristics can be measured at slightly different parts. In this case, since the measurement sites are different, if the characteristics differ depending on the site, the difference in the site will be the output result as it is. Further, when the measuring unit is re-installed at the same location, that is, in the method of measuring the transmission with the transmission measuring unit 50 of FIG. 5 and then measuring the reflection with the reflection measuring unit 80 of FIG. 11, each of them is located at the same location. It is necessary to reapply the measuring part. At this time, it is difficult to reapply to the same place with high accuracy.

What is shown as a method of avoiding them is a system by a measuring unit for measuring transmission and reflection characteristics shown in FIGS. 13 to 18. By using these, it is possible to measure transmission and reflection information of the same site.

(First specific example of a measuring unit for measuring transmission and reflection characteristics)
FIG. 13 shows a measuring portion showing a first specific example of a measuring portion in a measuring system for measuring transmission and reflection characteristics, which is an embodiment of the characteristic measuring system using light of the present invention, cut in the longitudinal direction at the center in the width direction. It is a sectional view. FIG. 14 is a plan view showing a first specific example of a measurement portion in a measurement system for measuring transmission and reflection characteristics, which is an embodiment of the light characteristic measurement system of the present invention. Here, the same parts as those of the transmission characteristic measurement system described in FIGS. 1 to 8 and the reflection characteristic measurement system described in FIGS. 9 to 12 are designated by the same reference numerals, and some description thereof will be omitted. There is. Further, in FIG. 14, the illustration of the fiber is omitted.

The transmission / reflection measurement unit 100 includes a reflection fiber fixing unit 101 and transmission fiber storage units 105 and 106. Further, the (reflection) incident fiber 71 and the (reflection) exit fiber 75 are attached to the reflection fiber fixing portion 101. Further, the transmission fiber storage unit 105 houses the (transmission) incident fiber 11 and the prism 107 on the measurement unit side, and the transmission fiber storage unit 106 houses a plurality of (transmission) exits on the measurement unit side. The fiber 15 and the prism 108 are housed in the fiber 15. Here, the longitudinal direction of the transmission / reflection measuring unit 100 is the left-right direction in FIG. 13, and the direction orthogonal to the longitudinal direction is the width direction.

The reflective fiber fixing portion 101 is a fan-shaped member obtained by cutting out a part of an angle of a thick cylinder, and has a constant thickness in the width direction. The inner arc portion 101a is formed with a constant radius centered on the measurement center 103. In the reflective fiber fixing portion 101, a plurality of straight holes 101c radially centered on the measurement center 103 (the center of the fan shape) penetrate from the inner arc portion 101a to the outer arc portion 101b near the center in the width direction. ing. An incident fiber 71 (for reflection) and an exit fiber 75 (for reflection) are inserted here. Then, the tips of the incident fiber 71 and the outgoing fiber 75 are arranged so as to be located on the inner surface of the arc portion 81a. Further, a convex lens may be provided at the tip of the (reflection) incident fiber 71 and the (reflection) exit fiber 75.

The side surface portions 101d and the side surface portions 101e on both sides of the reflective fiber fixing portion 101 in the longitudinal direction are formed at an angle from the horizontal plane. This is to prevent interference with the transmission fiber accommodating portions 105 and 106. This angle can be, for example, 20 ° or more, 30 ° or more, and the like.

In the examples of FIGS. 13 and 14, for example, a total of nine holes 101c of the reflection fiber fixing portion 101 are formed at equal angular intervals. These holes 101c are formed radially in the same vertical plane formed in the longitudinal direction from the measurement center 103. With respect to the plurality of holes 101c, if any one of them is a hole for the (reflection) incident fiber 71, the rest can be applied as a hole for the (reflection) exit fiber 75.

The prism 107 is a 45 ° prism, and the cross section cut in the longitudinal direction is an isosceles right triangle. One short side surface of the prism 107 is a surface facing outward with respect to the measurement center 103, and is connected to the (transmission) incident fiber 11. As a result, the (transmissive) incident fiber 11 can be connected to the prism 107 at the end in a state of extending in the longitudinal direction. Further, the other short side surface is the lower surface side and comes into contact with the surface of the measurement object 200.

The prism 108 is also a 45 ° prism, and the cross section cut in the longitudinal direction is a right-angled isosceles triangle. One short side surface of the prism 108 is a surface facing outward with respect to the measurement center 103, and is connected to the (transmission) exit fiber 15. As a result, the (transmission) exit fiber 15 can be connected to the prism 108 at the end in a state of extending in the longitudinal direction. Further, the other short side surface is the lower surface side and comes into contact with the surface of the measurement object 200.

A plurality of prisms 108 are formed in a straight line along the lower surface with respect to the prism 107 at different distances. Here, the direction of the straight line is the same as the direction in the longitudinal direction passing through the measurement center 103. The measurement center 103 is located between the prism 107 and the prism 108 closest to the prism 107. In the example of FIG. 13, six prisms 108 are arranged at six positions at equal intervals using six (transmissive) exit fibers 15.

The upper portion of the transmission fiber accommodating portion 105 on the measurement center 103 side is an inclined portion 105a. This is to suppress interference with the reflective fiber fixing portion 101 (side surface portion 101d) as much as possible. The inclined portion 105a may be linear or curved. In FIG. 13, a linear inclination having two angles having different inclination angles that become steep toward the measurement center 103 side is formed.

The transmissive fiber accommodating portion 106 and the transmissive fiber accommodating portion 105 are formed along the longitudinal direction so as to face each other with the measurement center 103 interposed therebetween. The upper portion of the transmission fiber accommodating portion 106 on the measurement center 103 side is an inclined portion 106a. This is also for suppressing interference with the reflective fiber fixing portion 101 (side surface portion 101e) as much as possible. The shape of the inclined portion 106a is the same as that of the inclined portion 105a.

The (transmitting) incident fiber 11 and the (reflecting) incident fiber 71 are connected to the irradiation fiber light source 10. Further, the spectroscopic imaging unit 20 is connected to the (transmission) exit fiber 15 and the (reflection) exit fiber 75, and can input the respective information to form an image.

With this configuration, the transmission characteristics and the reflection characteristics can be examined for the same measurement center 103.

In the case of transmission characteristics, the light from the irradiation fiber light source 10 is emitted to the lower measurement object 200 via the (transmission) incident fiber 11 and the prism 107. Then, the light is received by a plurality of prisms 108 having different distances, sent to the (transmitting) exit fiber 15, and sent to the spectroscopic imaging unit 20. Then, the processing device 30 performs the above-mentioned calculation.

In the case of the reflection characteristic, the light from the irradiation fiber light source 10 is emitted from the (reflection) incident fiber 71 to the measurement center 103, and the reflected light is received from the (reflection) exit fiber 75. , Is sent to the spectroscopic imaging unit 20. Then, the processing device 30 performs the above-mentioned calculation.

As for the optical information, if the light source for measuring the transmission characteristics and its light reception, and the light source and the light reception for measuring the reflection characteristics are measured at the same time, optical interference may occur. .. Therefore, a time difference is provided between the measurement of transmission characteristics and the measurement of reflection characteristics. For example, after measuring the transmission characteristics for 1 second, the transmission light source is turned off, and after a certain time (for example, 1 second), 1 second. Interference can be prevented by measuring the reflection characteristics.

In the above configuration, the arrangement direction of the (transmission) incident fiber 11 and the (transmission) exit fiber 15 and the direction of the (reflection) incident fiber 71 and (reflection) exit fiber 75 are the same. Therefore, it is possible to make the width narrow and compact as a whole. Further, by using the prisms 107 and 108, the size of the transmission fiber storage portions 105 and 106 can be reduced, the interference with the reflection fiber fixing portion 101 is minimized, and the angle of the reflection fiber fixing portion 101 is increased. Can be widened as much as possible to widen the observation angle range of reflection characteristics.

(Modification of the first specific example of the measurement portion for measuring transmission and reflection characteristics)
FIG. 16 is centered in the width direction of the transmission characteristic measurement portion showing a modification of the first specific example of the measurement portion in the measurement system for measuring transmission and reflection characteristics, which is an embodiment of the light characteristic measurement system of the present invention. It is a cross-sectional view cut in the longitudinal direction in.

As a modification here, an example in which the prisms 107 and 108 are eliminated from the “first specific example of the measuring unit for measuring transmission and reflection characteristics” described with reference to FIGS. 13 and 14 will be described. Since the prisms 107 and 108 are eliminated, the (transmission) incident fiber 11 and the (transmission) exit fiber 15 are bent downward at a right angle.

The transmission fiber storage units 105 and 106 of FIGS. 13 and 14 are transmission fiber storage units 115 that store the (transmission) incident fiber 11 and the transmission fiber storage unit 115 that stores the (transmission) exit fiber 15. Replaced by 116. The size of the transmission fiber storage portions 115 and 116 is higher than that of the transmission fiber storage portions 105 and 106. Further, the transmission fiber storage portions 115 and 116 have inclined portions 115a and 116a at the upper portion on the measurement center 103 side to avoid interference with the reflection fiber fixing portion 101.

In this modification, the cost is reduced by omitting the prisms 107 and 108, and the (transmission) incident fiber 11 and the (transmission) exit fiber 15 are directly applied to the surface of the object to be measured 200 for measurement. can do.

(Second specific example of the measurement part for measuring transmission and reflection characteristics)
FIG. 16 is a side view of the reflection characteristic toward the measurement unit, showing a second specific example of the measurement portion in the measurement system for measuring the transmission and reflection characteristics, which is an embodiment of the light characteristic measurement system of the present invention. FIG. 17 is a side view of a transmission characteristic measurement direction showing a second specific example of a measurement portion in a measurement system for measuring transmission and reflection characteristics, which is an embodiment of the light characteristic measurement system of the present invention. FIG. 18 is a plan view showing a second specific example of a measurement portion in a measurement system for measuring transmission and reflection characteristics, which is an embodiment of the light characteristic measurement system of the present invention. Here, the same parts as those of the transmission characteristic measurement system described with reference to FIGS. 1 to 8 and the reflection characteristic measurement system described with reference to FIGS. 9 to 12 are designated by the same reference numerals, and some description thereof are omitted. .. Further, in FIG. 17, the reflection fiber is not shown, and in FIG. 18, the fiber is not shown.

The transmission / reflection measurement unit 120 includes a reflection fiber fixing unit 121 and transmission fiber storage units 125 and 126. Further, the (reflection) incident fiber 71 and the (reflection) exit fiber 75 are attached to the reflection fiber fixing portion 121. Further, the (transmission) incident fiber 11 is housed in the transmission fiber storage unit 125 on the measurement unit side, and a plurality of (transmission) exit fibers 15 are housed in the transmission fiber storage unit 126 on the measurement unit side. It is stored in. The longitudinal direction of the reflective fiber fixing portion 121 is the left-right direction in FIG. 16, and the direction orthogonal to the left-right direction is the width direction. The longitudinal direction of the transmission fiber accommodating portions 125 and 126 is the left-right direction in FIG.

The reflective fiber fixing portion 121 is a semicircular member obtained by cutting a cylinder in half, and has a constant thickness in the width direction. The inner arc portion 121a is formed with a constant radius centered on the measurement center 123. In the reflective fiber fixing portion 121, a straight hole 121c radially centered on the measurement center 123 (the center of the semicircle) penetrates from the inner arc portion 121a to the outer arc portion 121b near the center in the width direction. An incident fiber 71 (for reflection) and an exit fiber 75 (for reflection) are inserted here. Then, the tips of the incident fiber 71 and the outgoing fiber 75 are arranged so as to be located on the inner surface of the arc portion 121a. Further, a convex lens may be provided at the tip of the (reflection) incident fiber 71 and the (reflection) exit fiber 75.

In the example of FIGS. 16 to 18, the holes 121c of the reflection fiber fixing portion 121 have a total of 11 holes formed at equal angle (15 °) intervals. These holes 121c are formed radially in the same vertical plane formed from the measurement center 123 in the longitudinal direction of the reflection fiber fixing portion 121. If any one of the plurality of holes 121c is used as a hole for the (reflection) incident fiber 71, the rest can be applied as a hole for the (reflecting) emitting fiber 75.

The incident fiber 11 (for transmission) is formed so as to extend in the longitudinal direction (of the transmission fiber storage portion 125), and at a position approaching the measurement center 123, the lower surface thereof is such that the tip is perpendicular to the surface of the measurement object 200. Is facing.

The plurality of (transmissive) exit fibers 15 are arranged at positions opposite to each other with the measurement center 123 in between. Then, the (transmission) exit fiber 15 is formed so as to extend in the longitudinal direction (of the transmission fiber storage portion 126), and the tip of the fiber 15 approaches the measurement center 123 at a right angle to the surface of the measurement object 200. It faces the bottom surface. The plurality of (transmission) exit fibers 15 are formed at different distances from the (transmission) incident fiber 11. Further, the distances between the tips of the plurality of (transmissive) exit fibers 15 may be evenly spaced. In the example of FIG. 17, six (transmissive) exit fibers 15 are used and six tip portions are arranged at equal intervals.

The tip position of the (transmission) incident fiber 11 and the tip positions of the plurality of (transmission) exit fibers 15 are in a straight line, and the direction of this straight line is the (reflection) incident fiber 71 and (for reflection). It is perpendicular to the radial plane on which the exit fiber 75 (for reflection) is formed.

The transmissive fiber accommodating portion 125 and the transmissive fiber accommodating portion 126 are formed along the longitudinal direction so as to face each other with the measurement center 123 interposed therebetween. Here, the orientation of the transmission fiber storage portion 125 and the transmission fiber storage portion 126 in the longitudinal direction is orthogonal to the orientation of the reflection fiber fixing portion 121 in the longitudinal direction (vertical plane direction). Then, the tip side of the transmission fiber storage portion 125 and the tip side of the transmission fiber storage portion 126 are partially inserted into the arc portion 121a inside the reflection fiber fixing portion 121, and are located in front of the measurement center 123. Have been placed up to. The upper portion of the transmission fiber storage portion 125 on the measurement center 123 side forms an inclined portion 125a, and the upper portion of the transmission fiber storage portion 126 on the measurement center 123 side forms an inclined portion 126a.

With this configuration, the transmission characteristics and the reflection characteristics can be examined for the same measurement center 123. The calculation of the transmission characteristic and the reflection characteristic is the same as the "first specific example of the measuring unit for measuring the transmission characteristic and the reflection characteristic" described with reference to FIGS. 13 and 14. The same applies to the connection to the irradiation fiber light source 10 and the spectroscopic imaging unit 20.

In the above configuration, the arrangement direction of the (transmission) incident fiber 11 and the (transmission) exit fiber 15 is perpendicular to the radial direction of the (reflection) incident fiber 71 and the (reflection) exit fiber 75. It was formed in. This makes it possible to arrange the (reflection) incident fiber 71 and the (reflection) exit fiber 75 in the semicircular reflection fiber fixing portion 121, and these fibers are arranged from 0 ° to nearly 180 °. It can be formed in the range of.

In the above configuration, the arrangement direction of the (transmission) incident fiber 11 and the (transmission) exit fiber 15 and the radiation direction of the (reflection) incident fiber 71 and (reflection) exit fiber 75 are Although the right-angled direction has been described, it can be applied at different angles as long as there is no interference even if the direction is not right-angled.

(Example of measurement application by a system that measures transmission and reflection characteristics)
A specific application example of the above-mentioned transmission and reflection characteristic measurement system will be described.

Since the system for measuring the transmission and reflection characteristics of the present invention combines the transmission optical system and the reflection optical system, it is possible to measure the same part. Therefore, for example, by scanning it two-dimensionally, it is possible to measure the transmission characteristics and the light distribution characteristics of a plurality of parts. As a result, the skin measurement result can be evaluated not only by spectroscopic imaging but also by more detailed evaluation including transmission information. In addition, as an application to foods, in the case of foods, internal components are quantified, but it is also useful for evaluation including appearance. In addition, as an application to industrial products, it will be possible to evaluate internal ingredients and appearance as in the case of foods.

As described above, the embodiments of the present invention have been described with reference to some examples, but the present invention is not limited to the above examples, and includes various modifications. For example, the present invention is not limited to the one having all the configurations provided in the above-described embodiment. It is also possible to delete a part of the configuration of one embodiment, replace it with the configuration of another embodiment, or add the configuration of another embodiment to the configuration of one embodiment.

For example, the number of emitting fibers 15 for measuring the transmission characteristics is not limited to the above embodiment, and may be configured to be larger than that of the above embodiment in any direction so that the details can be investigated.

For example, the angle at which the fibers for measuring the reflection characteristics are arranged radially may be configured more finely than that of the above embodiment, for example, every 0.5 °, every 1 °, etc., so that it can be investigated in detail. Further, the number of incident fibers 71 on the light emitting side may be not limited to one, but may be plurality, and light may be emitted from a plurality of locations to measure the reflection characteristics.

For example, the spectroscopic imaging unit 20 shows an example of a transmission type aberration-free spectroscope, but in addition to this, a reflection-type aberration-free spectroscope or an FT (Fourier Transform) type spectroscope can also be used.

1 Transmission characteristic measurement system 2 Reflection characteristic measurement system 10 Light source for irradiation fiber 11 (for transmission) Incoming fiber 15 (for transmission) Fiber for exit 20 Spectral imaging unit 26 Optical sensor 30 Processing device 40 Transmission measuring unit 41 Incident side block 42 Emission side block 50 Transmission measurement unit 51 Fiber fixing unit 65 Reference member 71 (for reflection) Incident fiber 75 (for reflection) Emission fiber 73 Fiber fixing unit 80 Reflection measurement unit 81 Fiber fixing unit 100 Transmission / reflection measurement unit 101 Reflective fiber fixing part 105, 106 Transmission fiber storage part 107, 108 Prism 115, 116 Transmission fiber storage part 120 Transmission / reflection measurement part 121 Reflection fiber fixing part 125, 126 Transmission fiber storage part

Claims (6)

A spectroscopic imaging unit that is an aberration-free spectroscope and has an optical sensor, an incident fiber that is connected to a light source and emits light from the other, and a plurality of exit fibers that are connected to the spectroscopic imaging unit and receive light from the other. It is equipped with a fiber and a processing device.
The other tip of the incident fiber and the exit fiber is configured to be applied perpendicularly to the surface of the object to be measured, and the position of the other tip of the plurality of exit fibers is the tip of the incident fiber. They are placed at different distances with respect to their position,
The spectroscopic imaging unit includes a first combination convex lens, a first prism, a grating, a second prism, and a second combination convex lens.
One of the plurality of emitting fibers is connected to the spectroscopic imaging unit side by side in the lateral direction.
The spectroscopic imaging unit uses the light obtained from the plurality of emitting fibers to be combined with the first combination convex lens, the first prism, the grating, the second prism, and the second combination. An image is formed on the optical sensor via a convex lens with the horizontal direction as the spatial axis and the vertical direction as the wavelength axis.
The processing device is a characteristic measurement system using light, which calculates transmission characteristics based on the imaging result obtained by the optical sensor. In the characteristic measurement system using light according to claim 1,
A characteristic measurement system using light, wherein the incident fiber and the other tip portion of the outgoing fiber are inserted into a hole provided in a reinforcing portion or a fiber fixing portion and formed in a straight line. In the optical characteristic measurement system according to claim 1 or 2.
The processing device is a characteristic measurement system using light, which is characterized in that transparency is calculated by using an imaging result by the optical sensor and a Y function of a color matching function. In the light characteristic measurement system according to any one of claims 1 to 3.
A characteristic measurement system using light, comprising a plurality of the incident fibers, and arranging the other tips of the plurality of emitting fibers at the same distance from the other tips of the plurality of incident fibers. A spectroscopic imaging unit that is an aberration-free spectroscope and has an optical sensor, an incident fiber that is connected to a light source and emits light from the other, and a plurality of exit fibers that are connected to the spectroscopic imaging unit and receive light from the other. It is equipped with a fiber and a processing device.
The other tip of the incident fiber is arranged so as to emit light at a certain angle from a position separated by a certain distance from the measurement center on the surface of the object to be measured, and the other tip of the plurality of emitting fibers is arranged. Are arranged so that the reflected light can be received at different angles at a position separated from the measurement center by a certain distance.
The spectroscopic imaging unit includes a first combination convex lens, a first prism, a grating, a second prism, and a second combination convex lens.
One of the plurality of emitting fibers is connected to the spectroscopic imaging unit side by side in the lateral direction.
The spectroscopic imaging unit uses the light obtained from the plurality of emitting fibers to be the first combination convex lens, the first prism, the grating, the second prism, and the second combination convex lens. An image is formed on the optical sensor via the above with the horizontal direction as the spatial axis and the vertical direction as the wavelength axis.
The processing device is a characteristic measurement system using light, which calculates reflection characteristics based on the imaging result obtained by the optical sensor. In the light characteristic measurement system according to claim 5.
A characteristic measurement system using light, wherein the incident fiber and the other tip portion of the outgoing fiber are inserted into a hole provided in a reinforcing portion or a fiber fixing portion and formed in a straight line.

Images