Optical waveguides – With optical coupler – Input/output coupler
Patent
1992-09-09
1993-12-14
Gonzalez, Frank
Optical waveguides
With optical coupler
Input/output coupler
385 33, 385 36, 385 39, 385 74, 385146, 385901, G02B 626
Patent
active
052710777
ABSTRACT:
A reflector for coupling light from a light source into an optical waveguide includes input and output ends, a central axis and a reflecting surface disposed around the central axis. A light source, such as an arc lamp, is positioned on the central axis at the input end of the reflector. An input end of an optical waveguide is positioned on the central axis at the output end of the reflector. The reflecting surface has a first section adjacent to the input end with a first curvature that is concave toward the central axis, a second section adjacent to the output end with a second curvature that is concave away from the central axis, and an inflection section between the first and second sections. The first and second curvatures are selected to reflect light through the output end of the reflector within a prescribed range of angles that corresponds to the acceptance angle of the optical waveguide.
REFERENCES:
patent: 4237332 (1980-12-01), Winston
patent: 4747660 (1988-05-01), Nishioka et al.
patent: 4767172 (1988-08-01), Nichols et al.
patent: 4883333 (1989-11-01), Yanez
patent: 5021928 (1991-06-01), Daniel
patent: 5022728 (1991-06-01), Fandrich
W. T. Welford et al., High Collection Nonimaging Optics, Academic Press (Harcourt Brace Jovanovich), New York (1989) p. 125.
R. Winston et al., "Nonimaging Concentrators (Optics)", Encyclopedia of Lasers and Optical Technology, Academic Press (Harcourt Brace Jovanovich), New York (1991) pp. 319-330.
Brockman Kacia K.
Fohl Timothy
Vicharelli Pablo A.
Craig Frances P.
Gonzalez Frank
GTE Products Corporation
Meyer William E.
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