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:
Oct. 25, 2016
Filed:
Oct. 14, 2014
Applicant:
Olympus Corporation, Tokyo, JP;
Inventor:
Takashi Kasahara, Tachikawa, JP;
Assignee:
OLYMPUS CORPORATION, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B 21/02 (2006.01); G02B 21/33 (2006.01); G02B 21/16 (2006.01);
U.S. Cl.
CPC ...
G02B 21/33 (2013.01); G02B 21/02 (2013.01); G02B 21/025 (2013.01); G02B 21/16 (2013.01);
Abstract
An immersion microscope objective includes, in order from an object side, a first lens group having a positive refractive power, a second lens group, and a third lens group, wherein the first lens group changes a light beam from an object to a convergent light beam, the second lens group has a refractive power smaller than that of the first lens group, and the following conditional expression (1-1) is satisfied: 7.5 mm<NA×d(1-1) where NAdenotes an object-side numerical aperture of the immersion microscope objective, and ddenotes a working distance of the immersion microscope objective.