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:
Mar. 04, 2014
Filed:
Mar. 18, 2008
Applicant:
Yasuhiro Omura, Kounosu, JP;
Inventor:
Yasuhiro Omura, Kounosu, JP;
Assignee:
Nikon Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03B 27/54 (2006.01); G03B 27/52 (2006.01); G03B 27/42 (2006.01);
U.S. Cl.
CPC ...
Abstract
A projection optical system for forming an image of a first surface on a second surface has a first imaging optical system and a second imaging optical system, and a folding member for guiding light from the first imaging optical system to the second imaging optical system. Every optical element having a power in the second imaging optical system is a refractive element.