Reflector for use in an artificial lighting device

Details Reflector for use in an artificial lighting device Reflector for use in an artificial lighting device

1980-09-02

1982-10-19

Walsh, Donald P.

Illumination

Light modifier

Reflector

362 3, 350296, F21V 700

Patent

active

043553508

ABSTRACT:
A reflector having a cross-sectional shape in the form of a 7th order polynomial which, when used with an artificial source of illumination of predetermined geometry, projects a beam of illumination having uniform intensity within a given solid angle. The polynomial shape is especially selected to provide a reflected, defocused source image, whose size increases with increasing angular divergence of light rays within the beam to compensate for natural losses in illumination which would otherwise occur as a function of angular divergence of light rays from the source when used without the reflector.

REFERENCES:
patent: 3553705 (1971-01-01), Ondrejka
patent: 3609332 (1971-09-01), Schindler
patent: 4027151 (1977-05-01), Bartnel
patent: 4173036 (1979-10-01), Ferguson
patent: 4194234 (1980-03-01), Geissler
patent: 4298909 (1981-11-01), Krieg
Goldberg et al., "Analysis and Para-Elliptic Reflector", Journal of the Optical Society of America, vol. 39, No. 6, pp. 497-500.

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