OPTICAL SENSOR AND PHYSICAL QUANTITY MEASUREMENT DEVICE

WIPO Patent Application WO/2020/262460

A1

This optical sensor (1) comprises a metal base section (10) formed in a cylindrical shape, an optical fiber member (20) inserted into the interior of the base section (10), and a sensor head (30) that is formed from single crystal alumina, joined to the base section, and optically connected with the optical fiber member (20). The optical sensor (1) is characterized in that the sensor head (30) comprises a first reflective surface (311) for reflecting some of light introduced from the optical fiber member (20) and a second reflective surface (312) provided facing the first reflective surface (311) and serving to reflect some of the light reflected by the first reflective surface (311), and in that said optical sensor (1) is provided with a first cavity (31) for outputting first interference light obtained by causing the light reflected by the first reflective surface (311) and the light reflected by the second reflective surface (312) to interfere with each other.

JPH08304203	OPTICAL METHOD AND SENSOR FOR DETECTING PRESSURE AND WAVE PLATE FOR SENSOR, POLARIZED LIGHT SELECTOR AND BEAM DISTRIBUTOR, AND MULTIPOINT MEASURING OPTICAL PRESSURE SENSOR SYSTEM AND ITS SENSING PROBE
JP2005029767	PRESSURE/TEMPERATURE SENSITIVE COMPOSITE FUNCTIONAL PAINT
WO/2021/246907	SENSITIVE ELEMENT OF PRESSURE SENSOR

SAKAMOTO AYUMU (JP)
FUJITA KEIICHI (JP)
YAMATE TSUTOMU (JP)
OGAWA KEN (JP)

PCT/JP2020/024836

December 30, 2020

June 24, 2020

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NAGANO KEIKI CO LTD (JP)

G01L11/02; G01B9/02; G01K11/12

US20150177132A1	2015-06-25
US20140318273A1	2014-10-30
JP2007532871A	2007-11-15
JPS58103633A	1983-06-20
US20090151423A1	2009-06-18

KINOSHITA & ASSOCIATES (JP)

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