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:
Jun. 30, 2020
Filed:
Jan. 15, 2019
Applicant:
Canon Kabushiki Kaisha, Tokyo, JP;
Inventor:
Koji Aoki, Saitama, JP;
Assignee:
CANON KABUSHIKI KAISHA, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04N 5/225 (2006.01); G02B 17/08 (2006.01); G02B 27/00 (2006.01); G03B 21/20 (2006.01); G02B 13/00 (2006.01); G02B 5/08 (2006.01);
U.S. Cl.
CPC ...
H04N 5/2254 (2013.01); G02B 5/08 (2013.01); G02B 17/0848 (2013.01); H04N 5/2253 (2013.01); G02B 27/0025 (2013.01);
Abstract
An imaging optical system includes, in order from an enlargement conjugate side to a reduction conjugate side, a first mirror as a convex mirror, a first lens unit, a second mirror as a concave mirror, a third mirror as a concave mirror, and a second lens unit. The imaging optical system is configured to form a first intermediate real image and a second intermediate real image located at a position different from that of the first intermediate real image between the first mirror and a reduction side conjugate plane.