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:
Nov. 03, 2009
Filed:
Mar. 23, 2007
Applicants:
Atsuo Masui, Sakai, JP;
Tokuji Matsuda, Kishiwada, JP;
Kohei Wataru, Sakai, JP;
Inventors:
Assignee:
Konica Minolta Opto, Inc., Hachioji-shi, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B 7/02 (2006.01);
U.S. Cl.
CPC ...
Abstract
A projection lens systemA enlarges and projects onto a screen, via a plurality of lenses Gto G, image light emitted from, a light sourceand modulated by DMDsto. A movable lens barrelholds the lens G, having positive power, which is positioned closest to the DMDsto. An outer tubeholds the movable lens barrelto enable movement in the optical axis direction. Through thermal deformation at the time of an increase in temperature, the bimetal membermoves the movable lens barrelin the optical axis direction so as to recede from the image formation devices which are the DMDsto