Method of and apparatus for viewing an image
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United States of America Patent
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N/A
Issued Date -
Jun 10, 2004
app pub date -
May 3, 2002
filing date -
Apr 9, 1998
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A head mountable apparatus is described for transmitting an image to the user's eye using switchable holographic optical elements. In one embodiment, an optical system is provided that is configured to receive an image provided by an image generator and which forms a light path along which light is transmitted from the image generator to an eye of the user. The optical system includes a first switchable holographic optical element configured to operate in an active state or an inactive state, wherein the first switchable holographic optical element is configured to diffract the image light incident thereon when the first switchable holographic optical element operates in the active state, and wherein the first switchable holographic optical element transmits the image light incident thereon without substantial alteration when the first switchable holographic optical element operates in the inactive state.
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