Patent ID: 6395558
Filing Date: 2002-05-28
Classification: G01N

Abstract:
A planar optical sensor platform, comprising a support material (a), and at least one thin waveguiding layer (b), the refractive index of the support material (a) being lower than the refractive index of the waveguiding layer (b), and the sensor platform being provided with a coupling grating for coupling in radiation, characterized in that (1) the coupling grating has a structure which is produced on the support material and reproduced in the waveguiding layer, or the coupling grating has a structure which is produced in the waveguiding layer, (2) a recognition layer (c) is located on the waveguiding layer, and (3) said coupling grating has a grating period that is non-constant perpendicular to the direction of the mode propagation, or (4) said coupling grating has a constant grating period and the layer thickness of the waveguiding layer changes perpendicularly to the direction of propagation of the guided mode.