High-efficiency LED illuminator with improved beam quality
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United States of America Patent
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Jul 5, 2016
Grant Date -
Sep 4, 2014
app pub date -
Mar 3, 2014
filing date -
Nov 23, 2009
priority date (Note) -
In Force
status (Latency Note)
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Abstract
An improved illuminator with an adjustable beam pattern to be worn by medical and dental professionals includes a housing, a light-emitting diode (LED) disposed in the housing outputting light through a distal opening in the housing, an achromatic doublet lens mounted in the opening in the housing, and a singlet lens disposed between the LED and the achromatic lens. The distance between the singlet lens and the doublet lens may be adjustable, and/or distance between the LED and the singlet lens may be adjustable, through a threaded connections, for example. In the preferred embodiment, the achromatic doublet lens, the singlet lens, or both the singlet and the doublet lens have a planar surface. A conical mirror may be disposed between the LED and the singlet lens to increase the light collection efficiency of the LED.
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