Patent ID: 8665444
Filing Date: 2014-03-04
Classification: G01N

Abstract:
1. A surface plasmon resonance measuring apparatus equipped with an optical member comprising a metal film, into which an excitation light beam enters at surface plasmon resonance angles and generates surface plasmon by being totally reflected by the metal film, the optical member comprising: an upper surface which is in contact with the metal film; a lower surface that faces the upper surface; a light incident surface connected to the upper surface and the lower surface, through which the excitation light beam enters the optical member; and a light output surface connected to the upper surface and the lower surface, through which the excitation light beam is output, wherein a distance between the light incident surface and the light output surface, and an angle formed by axes perpendicular to the light output surface and a bottom surface of the optical member are defined such that the excitation light beam enters the light incident surface at a plurality of different angles with respect to the metal film that satisfy the surface plasmon resonance angles, is totally reflected by the metal film, is not reflected by a corner between the upper surface and the light output surface, by a corner between the lower surface and the light output surface, and by the light output surface.