Title:
濃度測定装置及び糖度測定装置
Document Type and Number:
Japanese Patent JP4523143
Kind Code:
B2
Abstract:
To measure the concentration of an optically active substance in a solution without contacting the solution, the concentration measuring apparatus of the present invention comprises: a light source for outputting linearly polarized light; a light intensity detecting element disposed opposite the light source with a sample placed therebetween; an optically active liquid crystal element placed between the light source and the light intensity detection circuit; a control circuit which controls the voltage to be applied to the optically active liquid crystal element so that an output value from the light intensity detecting element will in effect take an extreme value; and a concentration computing circuit for computing the concentration of an optically active substance in the sample, based on an output from the control circuit.
Inventors:
Shigeru Morokawa
Takakazu Yano
Takeshi Matsumoto
Hiroyuki Uematsu
Takakazu Yano
Takeshi Matsumoto
Hiroyuki Uematsu
Application Number:
JP2000342989A
Publication Date:
August 11, 2010
Filing Date:
November 10, 2000
Export Citation:
Assignee:
Citizen Holdings Co., Ltd.
International Classes:
G01N21/21; A61B5/00; A61B5/145; A61B5/1455; G01J4/04
Domestic Patent References:
| JP58017342A | ||||
| JP9145605A | ||||
| JP9138231A | ||||
| JP10108857A | ||||
| JP8508903A | ||||
| JP7218889A |
Foreign References:
| WO1997018470A1 |
Attorney, Agent or Firm:
Akira Miyajima
Shigeru Tsuchiya
Shigeru Tsuchiya