Radiation-redistributive devices

Details Radiation-redistributive devices Radiation-redistributive devices

1975-08-25

1976-12-28

Wintercorn, Richard A.

350125, 350126, G03B 2160

Patent

active

RE0290912

ABSTRACT:
Devices for redistributing incident radiation in a prescribed manner. Such devices comprise a multitude of contiguous optical microelements, each of such microelements being contoured and oriented to redistribute incident radiation, emanating from an intended irradiating source, only throughout an angular field just large enough to encompass a predefined region wherein the redistributed radiation has particular utility. Moreover, the contour and orientation of each microelement is such as to produce substantially uniform radiance throughout such predefined region of utility, and to redirect extraneous or undesirable radiation incident thereon away from said predefined region. The radiation-redistributive devices of the invention are particularly useful as front or rear projection screens, lighting reflectors or refractors, illumination aids for photographic prints, traffic signs, advertisements, etc.

REFERENCES:
patent: 1970358 (1934-08-01), Bull et al.
patent: 2207835 (1940-07-01), Sukumlyn
patent: 2480031 (1949-08-01), Kellogg
patent: 2510344 (1950-06-01), Law
patent: 2804801 (1957-09-01), Mihalakis

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