| 摘要 |
A new and novel sensor having a simple structure with high detection sensitivity. The sensor (S 1 ) includes the following from measuring light (L 1 ) input side in the order listed below: a first reflector ( 10 ) having semi-transmissive and semi-reflective properties; a translucent body ( 20 ); and a second reflector ( 30 ) having perfect reflection properties, or semi-transmissive and semi-reflective properties. The first reflector ( 10 ) and/or second reflector is brought into contact with a specimen, and the average complex refractive index varies with the specimen. Absorption properties for absorbing light having a particular wavelength are produced by these components, the properties of the measuring light (L 1 ) are changed by the optical properties including the absorption properties, the output light (L 2 ) is outputted from the first reflector ( 10 ) and/or second reflector ( 30 ), and the physical properties of the output light (L 2 ) that vary according to the optical properties are detected.
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