Prism light guide luminaire with efficient directional output

Details Prism light guide luminaire with efficient directional output Prism light guide luminaire with efficient directional output

1993-02-23

1994-08-16

Lee, John D.

Optical waveguides

Noncyclindrical or nonplanar shaped waveguide

362 32, 385133, 385901, G02B 600

Patent

active

053393821

ABSTRACT:
A prism light guide luminaire has opaque and light emitting surface portions which together form a selected cross-sectional configuration. The opaque surface portion has a light reflecting characteristic. The light emitting surface portion is prism light guide material which confines, within the luminaire, light rays which strike the material at angles falling within the material's acceptance angular range. Within the luminaire, a light scattering area having a predefined shape and location redirects light into angles falling outside the material's acceptance angular range. The luminaire's cross-sectional configuration, the opaque surface portion's light reflecting characteristic, and the shape and location of the light scattering area are selected such that (i) light redirected by the light scattering area which does not pass directly from the scattering area to the light emitting surface portion and escape through that portion is substantially efficiently reflected by the prismatic material directly back onto the scattering area; and, (ii) all paths along which light may pass directly from the scattering area to the light emitting surface portion define a solid angle less than 2.pi..

REFERENCES:
patent: 4105293 (1978-08-01), Aizenberg et al.
patent: 4260220 (1981-04-01), Whitehead
patent: 4335421 (1982-06-01), Modia et al.
patent: 4337759 (1982-07-01), Popovich et al.
patent: 4615579 (1986-10-01), Whitehead
patent: 4750798 (1988-06-01), Whitehead
patent: 4755921 (1988-07-01), Nelson
patent: 4787708 (1988-11-01), Whitehead
patent: 4791540 (1988-12-01), Dreyer, Jr. et al.
patent: 4799137 (1989-01-01), Aho
patent: 4805984 (1989-02-01), Cobb, Jr.
patent: 4834495 (1989-05-01), Whitehead et al.
patent: 4850665 (1989-07-01), Whitehead
patent: 4874228 (1989-10-01), Aho et al.
patent: 4906070 (1990-03-01), Cobb, Jr.
patent: 4937716 (1990-06-01), Whitehead
patent: 4984144 (1991-01-01), Cobb, Jr. et al.
patent: 4989125 (1991-01-01), Cobb, Jr. et al.
patent: 4996632 (1991-02-01), Aikens
patent: 5016143 (1991-05-01), Aikens
patent: 5043850 (1991-08-01), Dreyer, Jr.
patent: 5117478 (1992-05-01), Cobb, Jr. et al.

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