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. 13, 1983
Filed:
Mar. 30, 1981
Shin'ichi Mihara, Hachiouji, JP;
Olympus Optical Co., Ltd., Tokyo, JP;
Abstract
A cata-dioptric type telephoto lens system comprising a first, second, third, fourth and fifth lenses, wherein the first lens is a positive meniscus lens arranged convex toward the object side, the second lens is a negative meniscus lens arranged convex toward the image side and having a reflecting surface formed on its convex surface by leaving a transparent central portion, the third lens is a biconvex lens cemented to the surface on the image side of the first lens, the fourth lens is a biconcave lens cemented to the surface on the object side of the first lens and having a reflecting surface formed on its surface on the object side, and the fifth lens is a negative meniscus lens cemented to the surface on the object side of the second lens, the cata-dioptric type telephoto lens system being extremely light in weight and compact and having aberrations corrected favorably.