Projection optical system

Details Projection optical system Projection optical system

2007-07-03

2007-07-03

Mack, Ricky (Department: 2873)

Optical: systems and elements

Lens

With field curvature shaping

C353S078000, C353S099000

Reexamination Certificate

active

11101344

ABSTRACT:
A projection optical system for performing enlargement projection from a primary image surface on the reduction side to a secondary image surface on the enlargement side has, from the primary image surface side, a lens optical system including two or more lens elements sharing a common rotation-symmetry axis and each having an optical power, a first reflective optical element having an optical power, and a second reflective optical element having a negative optical power. The projection optical system is non-telecentric toward the reduction side, and a prescribed condition is.

REFERENCES:
patent: 6631994 (2003-10-01), Suzuki et al.
patent: 6690517 (2004-02-01), Ohzawa et al.
patent: 2001/0048558 (2001-12-01), Lin
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patent: 2001-264627 (2001-09-01), None
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patent: 2002-341452 (2002-11-01), None
patent: 2003-35870 (2003-02-01), None

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