Optical: systems and elements – Lens – With field curvature shaping
Patent
1997-01-24
1999-10-05
Sugarman, Scott J.
Optical: systems and elements
Lens
With field curvature shaping
359715, 359781, G02B 934, G02B 1318
Patent
active
059633751
ABSTRACT:
A four element, athermalized projection lens for use in forming an enlarged color image of a LCD panel is disclosed. The powers of the elements from the screen to the LCD are negative/positive
egative/positive and the dispersions are low dispersion/low dispersion/high dispersion/low dispersion. The first three elements are composed of plastic and the last element is composed of glass. The projection lens exhibits a high level of aberration correction over magnifications ranging from about 5.times. to about 12.times.. The four element design comprises the minimum number of elements capable of achieving a relatively long back focal length, athermalization, and lateral color correction of less than about half a pixel.
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The Handbook of Plastic Optics, U.S. Precisions Lens, Inc., Cincinnati, Ohio, 1983, pp. 17-29.
Klee Maurice M.
Sugarman Scott J.
U.S. Precision Lens Inc.
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