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. 23, 2021
Filed:
Feb. 07, 2019
Olympus Corporation, Hachioji, JP;
Kazuteru Kawamura, Hachioji, JP;
OLYMPUS CORPORATION, Tokyo, JP;
Abstract
A telephoto lens includes first, second and third lens units. The first lens unit has positive refractive power front-side lens, first rear-side lens, and second rear-side lens units. The first lens unit has a negative lens element satisfying 0.5≤|f/fLn|≤4.908. The third lens unit has positive and negative lens elements. The first rear-side lens unit includes a predetermined negative lens element and a positive lens element. Lens elements of the front-side lens unit include at least one positive lens element. The second rear-side lens unit has a positive lens element. Conditional Expression 0.247≤ΔGFGR1/f≤0.5 is satisfied. f and fLn are focal lengths of the telephoto lens and predetermined negative lens element. ΔGFGR1 is an axial distance from an object-side surface in the front-side lens unit to an object-side surface in the first rear-side lens unit.