OPTICAL CHARACTERISTIC MEASUREMENT SYSTEM AND CALIBRATION METHOD FOR OPTICAL CHARACTERISTIC MEASUREMENT SYSTEM

• US 20170010214A1
• Filed: 07/01/2016
• Published: 01/12/2017
• Est. Priority Date: 07/07/2015
• Status: Active Grant

• Current Assignee: Otsuka Electronics Co., Ltd. (Otsuka Holdings Company Limited)
• Original Assignee: Otsuka Electronics Co., Ltd. (Otsuka Holdings Company Limited)
• Inventors: NOGUCHI, Munehiro, OSAWA, Yoshihiro, MIZUGUCHI, Tsutomu
• Granted Patent: US 10,222,261 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G01J 3/0218 using optical fibers
• CPC Class Codes: G01J 3/0251 Colorimeters making use of an integrating sphere
• CPC Class Codes: G01J 3/0254 Spectrometers, other than colorimeters, making use of an integrating sphere
• CPC Class Codes: 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
• CPC Class Codes: G01J 3/18 using diffraction elements, e.g. grating gratings per se G02B
• CPC Class Codes: G01J 3/28 Investigating the spectrum using colour filters G01J3/51
• CPC Class Codes: G01N 21/0332 with temperature control control of temperature G05D23/00; cryostats F17C3/08
• CPC Class Codes: G01N 21/274 Calibration, base line adjustment, drift correction
• CPC Class Codes: G01N 21/33 using ultraviolet light G01N21/39 takes precedence
• CPC Class Codes: G01N 21/35 using infrared light G01N21/39 takes precedence
• CPC Class Codes: G01N 21/645 Specially adapted constructive features of fluorimeters
• CPC Class Codes: G01N 2201/1211 for temperature

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

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; and

a suppression mechanism for suppressing temperature variations occurring around the first detection element in the housing.

2. The optical characteristic measurement system according to claim 1, wherein

the suppression mechanism includes a second cooling unit at least partially joined to the housing, for transferring heat in the housing to outside the housing.

3. The optical characteristic measurement system according to claim 1, wherein

the suppression mechanism includes a heat insulation mechanism arranged around the housing, for reducing heat entry into the housing from around the housing.

4. The optical characteristic measurement system according to claim 3, further comprising a second measurement apparatus, wherein

the first measurement apparatus further comprises 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,

the second measurement apparatus comprises:

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, and

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.

5. The optical characteristic measurement system according to claim 4, 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.

6. The optical characteristic measurement system according to claim 4, 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.

7. 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.