06222677 is referenced by 210 patents and cites 6 patents.

The invention provides a newly designed head mounted virtual image display that is dramatically less in weight than is known in the art by virtue of a unique beam folding design, making possible wearable computer systems of significantly greater convenience and acceptability to a wide range of users. The unit may be used comfortably in conjunction with eyeglasses. Optical systems according to the invention are provided that are advantageous for use with emissive, transmissive and reflective microdisplays, and which provide high optical performance, compact design and clear see-through properties. Also, the invention provides an improved method of illumination for reflection liquid crystal microdisplays. This makes possible optical systems for virtual image displays of improved field of view, compactness, and shorter image path combined with good efficiency.

Title
Compact optical system for use in virtual display applications
Application Number
9/437972
Publication Number
6222677 (B1)
Application Date
November 10, 1999
Publication Date
April 24, 2001
Inventor
Derek B Dove
Mount Kisco
NY, US
Russell A Budd
North Salem
NY, US
Agent
Ryan Mason & Lewis
US
Agent
Yoshihiro Ichii
US
Assignee
International Business Machines Corporation
NY, US
IPC
G02B 27/14
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