Fresnel lens spotlight with coupled variation of the spacing of lighting elements
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United States of America Patent
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Issued Date -
Aug 4, 2005
app pub date -
Dec 22, 2004
filing date -
Dec 22, 2003
priority date (Note) -
Abandoned
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Abstract
A Fresnel lens spotlight whose emitted light beam has a variable aperture angle, having a reflector, a lamp and at least one Fresnel lens is provided. The at least one Fresnel lens has a negative focal length and a virtual focal point.
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