G - Physics – 01 – N
Patent
G - Physics
01
N
G01N 21/77 (2006.01) G01N 21/47 (2006.01) G01N 21/84 (2006.01)
Patent
CA 2041438
A microoptical method and a corresponding sensor for detecting chemical substances in a sample. The sample is brought into contact with the waveguiding layer of a planar optical waveguide. Coherent light is coupled into the waveguiding layer, propagates therein as a guided wave, and the latter is decoupled from the waveguiding layer. Both, coupling and decoupling of the light wave guided in the planar waveguide are effected by means of a multi- diffractive grating situated in the plane of the layer, i.e. a grating structure comprising two or more fundamental frequency components for in-coupling and out-coupling, respectively. The multi-diffractive grating coupler results in a directional separation of decoupled light from reflected, transmitted and directly diffracted sub-beams, respectively. This makes possible a background- free detection of guided light decoupled from the waveguiding layer, although the regions on the waveguiding layer in which coupling and decoupling of the guided light wave take place overlap in part.
F. Hoffmann-La Roche Ag
Gowling Lafleur Henderson Llp
LandOfFree
Microoptical sensor does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Microoptical sensor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Microoptical sensor will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1394185