Optics: measuring and testing – Refraction testing – Prism engaging specimen
Patent
1995-04-07
1995-12-19
Pham, Hoa Q.
Optics: measuring and testing
Refraction testing
Prism engaging specimen
359509, 134 8, G01N 2141
Patent
active
054773180
ABSTRACT:
In an apparatus for detecting a property of a liquid, light is emitted from a light emitting element towards an interface between a liquid to be measured and a prism in an interface channel. Reflected light from the interface is received by a light receiving device, and a refractive index of the liquid is obtained from the total reflection critical angle. A cleaning member capable of contacting the interface by the flow of the liquid is provided. The cleaning member may be a small body or a floating member, a tape/string member having one end fixed to a channel wall, or a wiper swingable by the flow of the liquid.
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Goto Masayuki
Ohsaki Rie
Toda Yasuyoshi
Nippondenso Co. Ltd.
Pham Hoa Q.
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