Optics: image projectors – Distortion compensation
Patent
1993-09-09
1994-10-11
Cuchlinski, Jr., William A.
Optics: image projectors
Distortion compensation
353101, G03B 2114
Patent
active
053551885
ABSTRACT:
A projector (100) including an liquid crystal display image source (120), a field lens (126), and a projection lens (128) projects a full-color image by projecting and converging images of multiple liquid crystal displays ("LCDs"). The image is properly positioned without keystoning by tilting the field lens and offsetting the center of the LCD image source from the optical axis (142) of the projection lens. Trapezoidal error is eliminated by maintaining the optical center (156) of the field lens on the optical axis of the projection lens. During focusing, a mounting apparatus (164) adjusts the offset (154) between the center of the LCD and the optical axis of the projection lens for proper convergence of the images and maintains the optical center of the field lens on the optical axis of the projection lens.
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Biles Jonathan R.
Conner Arlie R.
Kingsley Gary B.
Cuchlinski Jr. William A.
Dowling William C.
In Focus Systems, Inc.
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