Arrangement for analysis of substances at or near the surface of an optical sensor with at least one wave-guiding film and at least one multidiffraction grating coupler for in-coupling and out-coupling of light beams, in which at least two light beams enclosing an angle .alpha. ...http://www.google.fr/patents/US5712705?utm_source=gb-gplus-shareBrevet US5712705 - Arrangement for analysis of substances at the surface of an optical sensor
Arrangement for analysis of substances at the surface of an optical sensor ...
