Optics: image projectors – Distortion compensation
Reexamination Certificate
2011-01-18
2011-01-18
Le, Que T (Department: 2878)
Optics: image projectors
Distortion compensation
C353S098000
Reexamination Certificate
active
07871166
ABSTRACT:
An optical projection system includes an image generation element, a projection lens set for receiving an image from the image generation element, refracting the image and projecting the image out, and a reflector for reflecting the image from the projection lens set and projecting the image to a screen. The projection lens set includes an aspherical lens with a distortion coefficient larger than 0.5 for producing a pincushion distortion of the image and several other lenses, and the absolute value of the sum of the distortion coefficients of the other lenses are less than the distortion coefficient of the aspherical lens. The reflector produces a barrel distortion to the image for compensating a pincushion distortion of the image produced by the projection lens set.
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Chen Jung-Yao
Lai Ching-Lung
Bui-Pho Pascal M
Le Que T
Shih Chun-Ming
Young Optics Inc.
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