Two piece curved projection lens method and apparatus

Details Two piece curved projection lens method and apparatus Two piece curved projection lens method and apparatus

1998-09-22

2000-02-08

Epps, Georgia

Optical: systems and elements

Lens

With support

G02B 702

Patent

active

06023380&

ABSTRACT:
A two piece plastic lens for a large screen projection system in which the two lens elements are formed with similar curves. The lens is supported at its peripheral edge by a flexible strip having a T-cross section that fits into a matching groove in a frame or on the housing. The curved lens elements tend not to separate with temperature changes and the like and focus and display quality are maintained.

REFERENCES:
patent: 4767186 (1988-08-01), Bradley et al.
patent: 4921330 (1990-05-01), Takahashi et al.
patent: 5400177 (1995-03-01), Petitto et al.

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