Optics: measuring and testing – By particle light scattering – With photocell detection
Patent
1988-11-04
1990-07-10
Willis, Davis L.
Optics: measuring and testing
By particle light scattering
With photocell detection
350 4612, G01B 902
Patent
active
049403281
ABSTRACT:
Optical devices and techniques are disclosed for sensing properties of an environment with improved stability and lower cost. In a disclosed embodiment, there is provided a substrate having an index of refraction n.sub.s. A waveguide layer is provided and has a surface adjacent the substrate, the waveguide layer having an index of refraction n.sub.f that is greater than n.sub.s. A superstrate is provided adjacent the opposing surface of the waveguide layer, the superstrate having an index of refraction n.sub.c that is less than n.sub.f, the index of refraction of the superstrate being affected by the environment. An optical beam is injected into the waveguide layer such that at least two modes of the beam propagate in the waveguide layer. The interfering product of said at least two modes of the beam which have propagated through the waveguide layer is then detected.
REFERENCES:
patent: 3923372 (1975-12-01), Dabby et al.
patent: 4447116 (1984-05-01), King et al.
patent: 4515430 (1985-05-01), Johnson
patent: 4536088 (1985-08-01), Rashleigh et al.
patent: 4552457 (1985-11-01), Giallorenzi
patent: 4608344 (1986-08-01), Carter et al.
patent: 4627731 (1986-12-01), Waters et al.
P. K. Tien, Light Waves in Thin Films and Integrated Optics, Appl. Opt., 10, 11, Nov. 1971.
H. F. Taylor et al., Guided Wave Optics, Proc. of IEEE, 62, 8, Aug. 1974.
R. Ulrich, Efficiency of Optical-Grating Couplers, J. Opt. Soc., 63, 11, Nov. 1973.
Georgia Tech Research Corporation
Koren Matthew W.
Novack Martin M.
Willis Davis L.
LandOfFree
Optical sensing apparatus and method does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Optical sensing apparatus and method, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical sensing apparatus and method will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1718147