Combination light concentrating and collimating device and light fixture and display screen employing the same
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United States of America Patent
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Sep 22, 1998
Grant Date -
N/A
app pub date -
Mar 26, 1993
filing date -
Mar 26, 1993
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The present invention is directed toward a light concentration and collimation device including a tapered body concentrator and a curved, preferably parabolic, reflective collimator combined in a unit such that the apex of the tapered body extends into the reflective collimator through its apex. The concentrator is preferably hollow with a reflective inner surface to funnel light from the base to the apex where an aperture allows the concentrated light to enter the collimator proximate to its focus. The light is then reflected from the inner surface of the collimator to form a beam of collimated light. The concentration and collimation device is particularly useful in visual display apparatus and may be combined with a spectral peak light source and a spectral distributor to produce individual collimated beams of light at specific wavelengths.
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