Optics: measuring and testing – By polarized light examination – With birefringent element
Patent
1995-06-06
1996-10-08
Turner, Samuel A.
Optics: measuring and testing
By polarized light examination
With birefringent element
356345, 356128, G01B 902
Patent
active
055637078
ABSTRACT:
An optical sensor for detecting gaseous or liquid chemical species including a sensing element having a flat light reflecting substrate and one or more transparent thin films which are organic or inorganic films or high-polymer films and are formed on the substrate. The detection of the gaseous or liquid chemical species is effected by measuring a change in the light reflection characteristic of the sensing element based on swelling of the thin film or a change in its thickness or refractive index or changes in both parameters.
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Liu Yuan
Motosugi Kenji
Ogura Shizuo
Prass Werner
Stehlin Thomas
Hoechst Aktiengesellschaft
Turner Samuel A.
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