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:
Sep. 21, 2010
Filed:
Jun. 27, 2007
Applicants:
Atsushi Matsuura, Sakai, JP;
Shinichi Suzuki, Izumi, JP;
Inventors:
Atsushi Matsuura, Sakai, JP;
Shinichi Suzuki, Izumi, JP;
Assignee:
Konica Minolta Opto, Inc., Hachioji-shi, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G03B 21/28 (2006.01);
U.S. Cl.
CPC ...
Abstract
A projection uniteffectively corrects out of focus due to a temperature rise. A mirror holding mechanism of a concave mirrorhas a mirror holderand a mirror holder base. The concave mirroris slidably housed in the mirror holder. A focus correction member, which expands by heat, is disposed between a back face of the concave mirrorand reference plane S formed in the mirror holder. The concave mirrorand the focus correction elementare urged to the reference plane S by a mirror retainer spring