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PROJECTION OPTICAL SYSTEM FOR COUPLING IMAGE LIGHT TO A NEAR-EYE DISPLAY

  • US 20140211322A1
  • Filed: 01/28/2013
  • Published: 07/31/2014
  • Est. Priority Date: 01/28/2013
  • Status: Active Grant
First Claim
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1. A projection optical system of a projection light engine for coupling image light from an image source of the projection light engine to a near-eye display comprising:

  • a support structure of a near-eye display device which may be worn by a user;

    a high index glass region supported by the support structure;

    a birdbath optical element having a reflective surface immersed in the high index glass region and positioned by the support structure for optically coupling image light from the image source; and

    the birdbath optical element collimating and reflecting the image light through the high index glass region to an external exit pupil which is external to the projection light engine.

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