# US 2019/0170577 A1 · Optical characteristic measurement system and calibration method for optical characteristic measurement system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0170577 A1 - Document ID: US20190170577A1 - Status: Published application - Kind: A1 - Application number: 16/271,608 - Filed: 2019-02-08 - Published: 2019-06-06 - Earliest claimed: 2015-07-07 - Assignees: Otsuka Electronics Co., Ltd. - Applicants: Otsuka Electronics Co., Ltd. - Inventors: Yoshihiro OSAWA; Tsutomu MIZUGUCHI; Munehiro NOGUCHI - Web page: https://patentgrep.com/patent/US20190170577A1 ## CPC - G01J 3/28: Investigating the spectrum (using colour filters G01J3/51) - G01J 3/0218: {using optical fibers} - G01J 3/0251: {Colorimeters making use of an integrating sphere} - G01J 3/0254: {Spectrometers, other than colorimeters, making use of an integrating sphere} - G01J 3/0286: {Constructional arrangements for compensating for fluctuations caused by temperature, humidity or pressure, or using cooling or temperature stabilization of parts of the device; Controlling the atmosphere inside a spectrometer, e.g. vacuum} - G01J 3/18: using diffraction elements, e.g. grating (gratings per se G02B) - G01N 21/274: {Calibration, base line adjustment, drift correction} - G01N 21/33: using ultraviolet light (G01N21/39 takes precedence) - G01N 21/35: using infrared light (G01N21/39 takes precedence) - G01N 21/645: {Specially adapted constructive features of fluorimeters} - G01N 21/0332: {with temperature control (control of temperature G05D23/00; cryostats F17C3/08)} - G01N 2201/1211: for temperature - G01J: MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY (light sources F21, H01J, H01K, H05B; investigating properties of materials by optical means G01N) - G01N: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES (measuring or testing apparatus or processes other than immunoassay, involving enzymes or microorganisms C12M, C12Q) ## Abstract There is provided an optical characteristic measurement system that can be set up in a relatively short time and can increase a detection sensitivity. The optical characteristic measurement system includes a first measurement apparatus. The first measurement apparatus includes: a first detection element arranged in a housing; a first cooling unit at least partially joined to the first detection element that cools the detection element; and a suppression mechanism that suppresses temperature variations occurring around the detection element in the housing. ## Claims ### Claim 1 An optical characteristic measurement system comprising: a first measurement apparatus, the first measurement apparatus comprising: a first detection element arranged in a housing; a first cooling unit at least partially joined to the first detection element, for cooling the first detection element; a suppression mechanism for suppressing temperature variations occurring around the first detection element in the housing; and a first diffraction grating arranged to correspond to the first detection element and configured to guide light in a first wavelength range to the first detection element; and a second measurement apparatus, the second measurement apparatus comprising: a second detection element arranged in a housing; and a second diffraction grating arranged to correspond to the second detection element and configured to guide light in a second wavelength range to the second detection element, wherein the first detection element of the first measurement apparatus is configured to have a detection sensitivity higher than a detection sensitivity of the second detection element of the second measurement apparatus. ### Claim 2 (depends on 1) The optical characteristic measurement system according to claim 1, further comprising a bifurcated fiber for bifurcating the light from an object to be measured and guiding the light to each of the first and second measurement apparatuses. ### Claim 3 (depends on 1) The optical characteristic measurement system according to claim 1, wherein the first measurement apparatus is configured to have the detection sensitivity to a wavelength component in a near-infrared region, and the second measurement apparatus is configured to have the detection sensitivity to at least a part of wavelength components included in a range of an ultraviolet region to a visible region. ### Claim 4 A calibration method for an optical characteristic measurement system including a first measurement apparatus and a second measurement apparatus configured to have a detection sensitivity lower than a detection sensitivity of the first measurement apparatus, the method comprising: arranging a light source preliminarily valued by an energy value and the second measurement apparatus in accordance with a first arrangement condition, and determining an energy calibration coefficient of the second measurement apparatus based on an output value obtained by receiving light from the light source at the second measurement apparatus; arranging the light source and the second measurement apparatus in accordance with a second arrangement condition, and determining a converted energy value of the light source corresponding to the second arrangement condition based on the output value obtained by receiving the light from the light source at the second measurement apparatus and the energy calibration coefficient of the second measurement apparatus; and arranging the light source and the first measurement apparatus in accordance with the second arrangement condition, and determining an energy calibration coefficient of the first measurement apparatus based on an output value obtained by receiving the light from the light source at the first measurement apparatus and the converted energy value of the light source corresponding to the second arrangement condition.