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:
Feb. 05, 2013
Filed:
Jul. 01, 2010
Kazuhiro Hayashi, Tokyo, JP;
Kenji Kawasaki, Tokyo, JP;
Kazuhiro Hayashi, Tokyo, JP;
Kenji Kawasaki, Tokyo, JP;
Olympus Corporation, Tokyo, JP;
Abstract
An observation optical system includes, in order from a sample side, an infinity-corrected objective, a first lens group having a positive power, a second lens group having a positive power, and a tube lens having a positive power. An intermediate image is formed between the first lens group and the second lens group, and at a front side focal position of the second lens group. A space along an optical axis between the objective and the first lens group is configured to be changeable, and a space along an optical axis between the second lens group and the tube lens is configured to be changeable.