Air cooled light fixture with baffled flow through a filter array
First Claim
1. a light fixture for providing energy in narrow spectral range which comprises:
- an elongated housing having openings at each end thereof;
a plurality of spaced apart filters in a pack positioned at the first end of said housing, the front most filter of said pack enclosing and sealing said first end of said housing to the passage of exterior atmosphere air therethrough, the others of said plurality of spaced apart filters having at least a portion of their outer periphery removed and are rotationally positioned to provide at least one tortuous air path between the filters of said pack and the atmosphere exterior thereof;
a broad spectrum energy source intermediate to the ends of said housing adapted to emit energy toward said filter pad; and
cooling means adapted to circulate exterior atmospheric air between an opening spaced from the first end of said housing and the end of said housing opposite said first end through said at least one tortuous air path and past said energy source,whereby energy absorbed in said housing, energy source and filter pack is removed by the circulation of said air.
1 Assignment
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Accused Products
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.
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Citations
20 Claims
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1. a light fixture for providing energy in narrow spectral range which comprises:
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an elongated housing having openings at each end thereof; a plurality of spaced apart filters in a pack positioned at the first end of said housing, the front most filter of said pack enclosing and sealing said first end of said housing to the passage of exterior atmosphere air therethrough, the others of said plurality of spaced apart filters having at least a portion of their outer periphery removed and are rotationally positioned to provide at least one tortuous air path between the filters of said pack and the atmosphere exterior thereof; a broad spectrum energy source intermediate to the ends of said housing adapted to emit energy toward said filter pad; and cooling means adapted to circulate exterior atmospheric air between an opening spaced from the first end of said housing and the end of said housing opposite said first end through said at least one tortuous air path and past said energy source, whereby energy absorbed in said housing, energy source and filter pack is removed by the circulation of said air. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification