Optics: measuring and testing – By polarized light examination – With birefringent element
Patent
1995-04-24
1995-12-26
Turner, Samuel A.
Optics: measuring and testing
By polarized light examination
With birefringent element
356345, 385 12, 422 8211, 436805, G01B 902
Patent
active
054792606
ABSTRACT:
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 with grating coupler, an imaging lens system and an optical detector (10).
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Epstein William H.
Gould George M.
Hoffmann-La Roche Inc.
Picut Catherine A.
Turner Samuel A.
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