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US 5,218,212 AGranted
Device for optically detecting a chemical change in fluid
AssigneesMitsubishi Denki Kabushiki Kaisha, Susumu Sato
InventorsSusumu Sato, Yoshihiro Togashi, Norio Ito, Koichi Ishii, Shinji Yasuda
Life of this patent
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Abstract
A device for optically detecting a chemical change of fluid comprises a prism placed in fluid to be tested and a layer of color indication material formed on a surface of the prism to thereby detect a chemical change of fluid by means of a transmitted light and a reflected light in the prism.
Claims6
A device for optically detecting a chemical change in a fluid comprising:
- a light source;
- a prism placed in said fluid and receiving light from said light source;
- a layer of color indication material having a thickness in a range of 100 .ANG.-600 .ANG. formed on a surface of said prism, said received light being reflected by said layer of color indication material, said reflected light having a change in color due to a change in said color indication material caused by a chemical change in the fluid;
- means for detecting the color change and thereby detecting the chemical change in said fluid.
1 more element
A device for optically detecting a chemical change in a fluid comprising:
- a light source;
- a prism for receiving light from said light source;
- a thin film of color indication material formed on a surface of said prism, the thickness of said thin film being in the range of 100 .ANG.-600 .ANG., said thin film having a color reaction due to the absence or presence of an acidic substance or basic substance in the fluid, said color reaction causing a change in color in the reflected light.
Dependencies are inferred from the claim text.