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公开(公告)号：DE69321191T2
公开(公告)日：1999-04-29
申请号：DE69321191
申请日：1993-11-11
Applicant: HOECHST AG
Inventor： LIU YUAN DR , PRASS WERNER DR , STEHLIN THOMAS DR , OGURA SHIZUO , MOTOSUGI KENJI , TOKIDA AKIHIKO DR , YAMAMOTO TETSU
Abstract: The present invention pertains to an optical sensor for detecting gaseous or liquid chemical species which comprises a sensing element having a thin film and means of measurement by interference enhanced reflection. The sensing element comprises preferably a flat light reflecting substrate and one or more transparent thin organic or inorganic films or high-polymer films that are formed on said substrate. The detection of the gaseous or liquid chemical species is effected by measuring the change in the light reflection characteristic of the sensing element on the basis of the swelling of the thin film or the change in its thickness or refractive index or the changes in both parameters. The invention concerns also an apparatus including such optical sensor for detecting the presence of a toxic, combustible or flammable gas, vapor or solvent, an alarm and/or a means of running on and off switches or pipelines.
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公开(公告)号：DE69321191D1
公开(公告)日：1998-10-29
申请号：DE69321191
申请日：1993-11-11
Applicant: HOECHST AG
Inventor： LIU YUAN DR , PRASS WERNER DR , STEHLIN THOMAS DR , OGURA SHIZUO , MOTOSUGI KENJI , TOKIDA AKIHIKO DR , YAMAMOTO TETSU
Abstract: The present invention pertains to an optical sensor for detecting gaseous or liquid chemical species which comprises a sensing element having a thin film and means of measurement by interference enhanced reflection. The sensing element comprises preferably a flat light reflecting substrate and one or more transparent thin organic or inorganic films or high-polymer films that are formed on said substrate. The detection of the gaseous or liquid chemical species is effected by measuring the change in the light reflection characteristic of the sensing element on the basis of the swelling of the thin film or the change in its thickness or refractive index or the changes in both parameters. The invention concerns also an apparatus including such optical sensor for detecting the presence of a toxic, combustible or flammable gas, vapor or solvent, an alarm and/or a means of running on and off switches or pipelines.
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公开(公告)号：DE69409009T2
公开(公告)日：1998-10-01
申请号：DE69409009
申请日：1994-05-31
Applicant: HOECHST AG
Inventor： ROTH CHRISTOPH , LIU YUAN , PRASS WERNER , YAMAMOTO TETSU , MOTOSUGI KENJI
Abstract: PCT No. PCT/EP94/01768 Sec. 371 Date Nov. 7, 1995 Sec. 102(e) Date Nov. 7, 1995 PCT Filed May 31, 1994 PCT Pub. No. WO94/28395 PCT Pub. Date Dec. 8, 1994Disclosed and claimed is an optical sensor for the detection of chemical species. The optical sensor includes an optical waveguide having a guiding thin film. The thickness of the refrative index of the guiding thin film changes due to adsorption or absorption of the chemical species or reaction of the chemical species with the guiding thin film. The thickness of the guiding thin film is above the cutoff thickness in the presence of gaseous or liquid chemical species to be detected. And, the thickness of the guiding thin film is below the cutoff thickness in the absence of such chemical species.
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公开(公告)号：DE69409009D1
公开(公告)日：1998-04-16
申请号：DE69409009
申请日：1994-05-31
Applicant: HOECHST AG
Inventor： ROTH CHRISTOPH , LIU YUAN , PRASS WERNER , YAMAMOTO TETSU , MOTOSUGI KENJI
Abstract: PCT No. PCT/EP94/01768 Sec. 371 Date Nov. 7, 1995 Sec. 102(e) Date Nov. 7, 1995 PCT Filed May 31, 1994 PCT Pub. No. WO94/28395 PCT Pub. Date Dec. 8, 1994Disclosed and claimed is an optical sensor for the detection of chemical species. The optical sensor includes an optical waveguide having a guiding thin film. The thickness of the refrative index of the guiding thin film changes due to adsorption or absorption of the chemical species or reaction of the chemical species with the guiding thin film. The thickness of the guiding thin film is above the cutoff thickness in the presence of gaseous or liquid chemical species to be detected. And, the thickness of the guiding thin film is below the cutoff thickness in the absence of such chemical species.
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