The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 03, 2007
Filed:
Apr. 07, 2005
Applicant:
Tomiei Kuwa, Musashino, JP;
Inventor:
Tomiei Kuwa, Musashino, JP;
Assignee:
Konica Minolta Opto, Inc., Hachioji-Shi, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02B 9/00 (2006.01); G03B 21/22 (2006.01); G03B 21/28 (2006.01);
U.S. Cl.
CPC ...
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.