Patent ID: 7843571
Filing Date: 2010-11-30
Classification: G01N

Abstract:
1. A sensing system comprising: a sensing element which outputs light having a physical characteristic varying with a specimen, in response to injection of light onto the sensing element; a light injection unit which injects laser light as first light onto said sensing element, and has a wavelength stabilizing arrangement stabilizing an oscillation wavelength of the laser light by use of a wavelength selector built in the wavelength stabilizing arrangement; and a light detection unit which detects a physical characteristic of second light which is outputted from said sensing element in response to injection of said first light onto the sensing element; wherein said sensing element includes, at least one of said first reflector and said second reflector is arranged in contact with the specimen, and has an average complex refractive index which varies with the specimen; and said sensing element exhibits an absorption characteristic that light injected onto the sensing element is selectively absorbed at a specific wavelength according to average complex refractive indexes which said first reflector and said second reflector respectively have and an average complex refractive index and a thickness which said transparent body has, and outputs light in which said absorption characteristic is reflected, from at least one of said first reflector and said second reflector.