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. 12, 2019
Filed:
Oct. 11, 2013
Nikon Corporation, Tokyo, JP;
Yoshikazu Sugiyama, Yokohama, JP;
NIKON CORPORATION, Tokyo, JP;
Abstract
A catadioptric photographic lens include; a first reflecting mirror, a second reflecting mirror, and a lens group, arranged in order from an object so that light reflected by the first reflecting mirror is reflected by the second reflecting mirror before passing through the lens group and forms an image of the object upon a predetermined image plane wherein; the first and the second reflecting mirror are off-center on the reference plane; reflection surfaces of the first and the second reflecting mirror are rotationally asymmetric aspheric surfaces; the reflection surface of the first reflecting mirror is concave toward the object on the reference plane and on the first orthogonal plane; and the surface closest toward the second reflecting mirror in the lens group having two lenses made from the same optical material as one another is a rotationally asymmetric aspheric surface.