Patent ID: 8937721
Filing Date: 2015-01-20
Classification: G01N

Abstract:
1. A detection device, comprising: a detection plate comprising a silicon oxide layer, a silicon layer, and a silica glass substrate in the stated order from the top; an optical prism which is optically adhered to a surface of the silica glass substrate of the detection plate, where the surface is not provided with the silicon layer and the silicon oxide layer; a light-irradiation unit configured to irradiate light to the detection plate through the optical prism and arranged so that light is incident on the optical prism with a fixed incident angle; and a light-detection unit configured to detect intensity of reflected light reflected from the detection plate; wherein in the optical prism, an angle between an incident surface on which light irradiated from the light-irradiation unit is incident and an adhesion surface which adheres to the detection plate is 43° or less.