Air cooled light fixture with baffled flow through a filter arra

Details Air cooled light fixture with baffled flow through a filter arra Air cooled light fixture with baffled flow through a filter arra

1984-05-23

1985-10-08

Nelson, Peter A.

Illumination

Light source and modifier

Plural serial lens elements or components

362 19, 362294, 362218, 362293, 362264, 362331, 362276, 362373, F21V 908

Patent

active

045464200

ABSTRACT:
A simple, light weight air cooled filter arrangement for a high intensity narrow band pass filtered light fixture. In lighting fixtures such as infrared energy sources or stage lighting, it is necessary to filter a conventional broad spectrum energy source so that only energy in the desired region is transmitted. These filters which absorb energy in bands other than those being transmitted tend to become very hot particularly when high energy sources are required. A light fixture is provided having a plurality of spaced filters near a light output end. Each filter, except the outer most filter, has a portion of its outer periphery removed. These open areas are alternately positioned to form a tortuous air path between adjacent filters. A cooling fan draws filtered exterior ambient air through the tortuous paths between the filters and exits the warmed air past the energy source out the end remote from the filters. Sensors are provided for controlling the output of the energy source relative to exterior light and exiting air temperatures and the fan operation.

REFERENCES:
patent: 3116022 (1963-12-01), Davis
patent: 3185028 (1965-05-01), Andreoli
patent: 3831021 (1974-08-01), Muhlogger
patent: 4196544 (1980-04-01), Davis et al.
patent: 4321659 (1982-03-01), Wheeler
patent: 4450512 (1984-05-01), Kristofek

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