Pancake window display system employing one or more switchable holographic optical elements
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United States of America Patent
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Dec 9, 2003
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N/A
app pub date -
Aug 3, 1999
filing date -
Jul 29, 1998
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Expired
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Abstract
An optical system including one or more switchable holographic optical elements is described for use with a pancake window display system. Each of the switchable holographic optical elements of the optical system operates between active and inactive states in accordance with control signals provided by a control logic circuit. In the active state, each switchable holographic optical element operates to reflect and collimate a narrow band of incident light thereon. In the inactive state, the switchable holographic optical element operates to transmit a substantial portion of light thereon without substantial alteration.
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