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US 5,671,992 AGranted
Stereoscopic display unit
AssigneeXenotech Research Pty. Ltd.
InventorAngus Duncan Richards
Life of this patent
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AssigneeXenotech Research Pty. Ltd.
InventorAngus Duncan Richards
Estimating the term…
A stereoscopic display unit (10, 110) including at least two projection units (14, 16) for projecting optical signals corresponding to the left and right image fields respectively of a stereoscopic image, and an optical focusing system (18) for focusing the two image fields to at least two focus regions at a viewing position outside of the display unit (10, 110). The left and right image fields are each respectively focused into the respective eyes of at least one viewer (72) when located at said viewing position. The optical focusing system (18) includes at least one retroreflective mirror (64, 210) and a semi-reflective mirror (66) disposed at an angle to the at least one retroreflective mirror (64, 210), the semi-reflective mirror (66) being partially reflective and partially transmissive, the optical signal being reflected between the at least one retroreflective mirror (64, 210) and the semi-reflective mirror (66) and to said viewing position.
A stereoscopic display unit including two projection units for projecting optical signals corresponding to the left and right image fields respectively of a stereoscopic image, and an optical focusing system for focusing the two image fields to at least two focus regions at a viewing position outside the display unit, the left and right image fields each being respectively focused into the respective eyes of at least one viewer when located at said viewing position, wherein the optical focusing system includes at least one retroreflective mirror and a semi-reflective mirror disposed at an angle to the at least one retroreflective mirror, the semi-reflective mirror being partially reflective and partially transmissive, the optical signal being reflected between the at least one retroreflective mirror and the semi-reflective mirror and to said viewing position, the optical signals projected from the projection units being directed to the semi-reflective mirror by first and second fully reflective mirrors which are positioned at an angle at least substantially 90.degree. relative to each other.
A stereoscopic display unit including:
A stereoscopic display unit including two projection units for projecting optical signals corresponding to the left and right image fields respectively of a stereoscopic image, and an optical focusing system for focusing the two image fields to at least two focus regions at a viewing position outside the display unit, the left and right image fields each being respectively focused into the respective eyes of at least one viewer when located at said viewing position, wherein the optical focusing system includes first and second retroreflective mirrors and a semi-reflective mirror disposed at an angle to the first and second retroreflective mirrors, the semi-reflective mirror being partially reflective and partially transmissive, the optical signal being reflected between the first retroreflective mirror and the semi-reflective mirror and to said viewing position, at least a portion of the optical signals passing through the semi-reflective mirror being reflected from the second retroreflective mirror, the optical signals being subsequently reflected from the semi-reflective mirror to the viewing position.
Dependencies are inferred from the claim text.