Patent ID: 9291548
Filing Date: 2016-03-22
CPC Classification: G01N

Claim Text:
1. A detection unit, comprising: a first member having an opaque substrate and an optical thin film on the substrate, a first site of a surface of the optical thin film having a biochemical substance immobilized thereon; a second member, a second site of a surface of the second member having the same biochemical substance immobilized thereon as the biochemical substance immobilized on the first site of the surface of the optical thin film; and an optical detection system having a light guide for guiding irradiation light to the first site and the second site, and a computer unit calculating variation in reflected light therefrom, wherein the first site of the surface of the optical thin film and the second site of the surface of the second member face each other to form a gap for introducing an aqueous solution into the gap, and wherein an end of the light guide faces another surface of the second member which is opposite to the surface including the second site.