Light pipe system having maximum radiation throughput

Details Light pipe system having maximum radiation throughput Light pipe system having maximum radiation throughput

1990-03-02

1991-10-08

Lee, John D.

Optical waveguides

Optical imaging tunnel

385125, 385147, G02B 600

Patent

active

050548697

ABSTRACT:
A radiation guiding structure for incoherent radiation is disclosed in which a collimated beam is transmitted through a light pipe having high radition throughput. Radiation losses due to absorbance are minimized by: (1) matching the area of the beam and the light pipe passage; (2) minimizing the number of reflectances of a given ray by reducing the angular divergence of radiation in the beam; and (3) using a reflective coating on the wall of the light pipe which has the low point of its reflectance curve at a relatively high grazing angle.

REFERENCES:
patent: 3998591 (1976-12-01), Eckfeldt
patent: 4029391 (1977-06-01), French
patent: 4305640 (1981-12-01), Cullis et al.
patent: 4411490 (1983-10-01), Daniel
patent: 4420690 (1983-12-01), Kuehl
patent: 4496211 (1985-01-01), Daniel
patent: 4730882 (1988-03-01), Messerschmidt
Ohlmann et al., "Far Infrared Transmission Through Metal Light Pipes", J.O.S.A., vol. 48, No. 8, Aug. 1958, pp. 531-533.

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