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. 14, 2017
Filed:
Jul. 28, 2015
Applicant:
Canon Kabushiki Kaisha, Tokyo, JP;
Inventor:
Yusuke Akiyama, Utsunomiya, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02B 15/14 (2006.01); G02F 1/00 (2006.01); G02B 15/177 (2006.01); G02B 13/04 (2006.01); G02B 13/16 (2006.01); G02B 27/00 (2006.01);
U.S. Cl.
CPC ...
G02B 15/177 (2013.01); G02B 13/04 (2013.01); G02B 13/16 (2013.01); G02B 27/0025 (2013.01);
Abstract
A projection optical system including a plurality of positive lenses and a plurality of negative lenses is provided. Values for an Abbe number and anomalous dispersion of materials for a positive lens and a negative lens arranged in a predetermined range from an enlargement conjugate side and values for the Abbe number and the anomalous dispersion of materials for a positive lens and a negative lens arranged in a predetermined range from a reduction conjugate side are appropriately set.
Akiyama, Yusuke. (2017). Projection optical system and image projection apparatus including the same (U.S. Patent No. 9594236). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/9594236
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile