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. 15, 2011
Filed:
Apr. 22, 2010
Applicant:
Miwako Yoshida, Yokohama, JP;
Inventor:
Miwako Yoshida, Yokohama, JP;
Assignee:
Nikon Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B 21/02 (2006.01); G02B 9/12 (2006.01); G02B 27/02 (2006.01);
U.S. Cl.
CPC ...
Abstract
An immersion type microscope objective lens OL includes, in order from a cover plate C side, a first lens group Ghaving positive refractive power, a second lens group Ghaving positive refractive power, and a third lens group Ghaving negative refractive power. The first lens group Gincludes at least one cemented lens. The second lens group Gincludes at least two achromatic lenses. The third lens group Gincludes, in order from the object side, an achromatic lens CLhaving a strong concave surface facing an image side, and an achromatic lens CLhaving a strong concave surface facing the object side.