Optical: systems and elements – Compound lens system – With image recorder
Reexamination Certificate
2009-06-08
2011-12-20
Consilvio, Mark (Department: 2872)
Optical: systems and elements
Compound lens system
With image recorder
C359S434000, C359S504000
Reexamination Certificate
active
08081377
ABSTRACT:
The wide angle lens system described herein allows projection devices (e.g., rear projection display devices) to be more compact than would otherwise be possible. The lens system includes a wide angle lens stage and a relay lens stage. When operating as a projection device, the relay lens stage projects a distorted intermediate image to the wide angle lens stage, which projects the image for display. The distortion cause by the relay lens stage compensates (i.e., is approximately equal and opposite) for the distortion caused by the wide angle stage. The distortion can be the image shape and/or the focal plane. When operating as a taking device, the wide angle stage provides a distorted image to the relay lens stage, which compensates for the distortion and provide a less distorted, or even non-distorted image, for capture.
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Alleman Hall Mccoy Russell & Tuttle LLP
Consilvio Mark
InFocus Corporation
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