G - Physics – 01 – N
Patent
G - Physics
01
N
G01N 21/31 (2006.01) G01N 21/41 (2006.01) G01N 21/55 (2006.01) G02B 6/124 (2006.01) G02B 6/34 (2006.01)
Patent
CA 2119980
Summary The optical process for analyzing substances is based on the measurement of the propagation properties of optical surface waves on sensor surfaces. In a wave guide layer structure in contact with a sample, guided light waves are decoupled with a grating coupler. The decoupling region of the grating coupler is imaged onto a position resolving detector so that the plane of the wave guide layer structure forms the object plane and the detection plane lies in the image plane of the optical imaging. The light distribution of the decoupled wave field in the image plane is measured with the detector and used to determine the analytical quantity to be measured. The device for carrying out the process consists of a suitable wave guide sensor (1,2) with grating coupler (3), an imaging lens system (9) and an optical detector (10).
F. Hoffmann-La Roche Ag
Gowling Lafleur Henderson Llp
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