Projection optical system

Details Projection optical system Projection optical system

2005-10-18

2008-08-12

Schwartz, Jordan M (Department: 2873)

Optical: systems and elements

Lens

With field curvature shaping

C359S726000

Reexamination Certificate

active

07411737

ABSTRACT:
A projection optical system for projecting, while enlarging, an image formed on an image formation surface onto an image projection surface from an oblique direction relative thereto has at least three optically powered reflective surfaces and a refractive lens surface having a non-rotation-symmetric free-form curved surface and disposed between the first and second reflective surfaces as counted from the image formation surface side.

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Japanese “Notice of Reasons for Refusal”, dated Dec. 11, 2007, for counterpart Japanese Patent Application No. 2003-090958; along with an English-language translation thereof.

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