Infrared floodlight

Details Infrared floodlight Infrared floodlight

1985-04-25

1986-08-05

Cross, E. Rollins

Illumination

Light source and modifier

Including selected wavelength modifier

362346, 362347, 362298, 313113, F21V 900

Patent

active

046046801

ABSTRACT:
An infrared floodlight assembly designed particularly for security purposes and including a heat-conducting housing, a lens secured to the housing to provide a closure therefor, and a floodlight located within (and surrounded by) the housing. The floodlight combines the use of a tungsten halogen light source and dichroic hot and cold mirrors for directing substantially only infrared radiation toward the assembly's forward lens. Visible radiation is absorbed by the housing's interior wall(s) and, optionally, by a filter located between the floodlight and lens. An optional means may be used within the floodlight to reflect all forward radiation back toward the paraboloidal hot mirror or, alternatively, to reflect only visible radiation in this direction. The dichroic hot and cold mirrors preferably each comprise a glass substrate having multiple layers of titanium dioxide and silicon dioxide thereon.

REFERENCES:
patent: 3944320 (1976-03-01), McLintic
patent: 4037096 (1977-07-01), Brendgord et al.
patent: 4095881 (1978-06-01), Maddox
patent: 4197480 (1980-04-01), Ryan, Jr. et al.
patent: 4488207 (1984-12-01), Harmon

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