Patent ID: 9383311
Filing Date: 2016-07-05
CPC Classification: G01N,G02B

Claim Text:
1. A system for making measurements using an evanescent wave phenomenon at total internal reflection, the system comprising: a) a surface exhibiting the evanescent wave phenomenon at total internal reflection, comprising a plurality of sensing areas of interest, one or more of which are capable of binding to material in a fluid sample that comes in contact with them; b) an illumination sub-system comprising a light source, which illuminates each sensing area of interest on the sample surface over a range of angles of incidence; c) a detector which responds to an intensity of light received by it, the response being distinguishable for light received by the detector at different locations; d) primary optics that projects a real or virtual focused image of the illuminated sample surface; and e) a plurality of secondary elements, which receive light of the image projected by the primary optics and project their received light onto the detector, spreading out light reflected from each sensing area of interest at different angles of incidence to different locations on the detector; wherein the secondary elements are close enough to the focused image of the sample surface, and the detector is close enough to a focal plane of the secondary elements, so that it is possible to determine, from the response of the detector, how much light is reflected from each sensing area of interest, as a function of angle of incidence over the range of angles for that area; and wherein the sensing areas of interest are arranged one-dimensionally on the sample surface.