Optical engine and wide angle projection lens module thereof

Details Optical engine and wide angle projection lens module thereof Optical engine and wide angle projection lens module thereof

2008-09-27

2010-06-15

Collins, Darryl J (Department: 2873)

Optical: systems and elements

Lens

With reflecting element

C359S771000, C359S781000, C359S795000

Reexamination Certificate

active

07738190

ABSTRACT:
A wide-angle projection lens module is provided, including a reflective convex aspheric mirror and a refractive lens group of positive refractive power. The following Conditions (1) to (2) are satisfied:in-line-formulae description="In-line Formulae" end="lead"?15<|Freflective/F|<25   Condition (1),in-line-formulae description="In-line Formulae" end="tail"?andin-line-formulae description="In-line Formulae" end="lead"?1.5<|Frefractive/f|<2.0   (Condition (2),in-line-formulae description="In-line Formulae" end="tail"?wherein, F is a focal length of the wide-angle projection lens module, Freflectiveis a focal length of the reflective convex mirror, and Frefractiveis a focal length of the refractive lens group.

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