DIFFRACTIVE OPTICAL RELAY DEVICE WITH IMPROVED COLOR UNIFORMITY
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United States of America Patent
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Issued Date -
Jul 15, 2010
app pub date -
Aug 22, 2007
filing date -
Aug 23, 2006
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
An optical relay comprises a light-transmissive substrate having a plurality of diffractive optical elements, where at least one diffractive optical element is characterized by nonuniform diffraction efficiency. The substrate and diffractive optical elements are designed and constructed to relay at least a portion of a light beam emanating from an object to at least one predetermined eye-box in a manner such that for each point of the object, there is a set of parallel outgoing light rays originating from the point and arriving to the eye-box. The color difference between any two parallel light rays of the set is less than 50 ΔE* units.
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