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:
May. 26, 1998
Filed:
Mar. 05, 1996
Norio Murayama, Mitaka, JP;
Yoshiyuki Shimizu, Miura, JP;
Nikon Corporation, , JP;
Abstract
A microscope objective, and microscope incorporating same, are disclosed. A representative embodiment of the objective comprises, arranged on an optical axis, a front lens group having positive refractive power disposed on the object side, a rear lens group having negative refractive power disposed on the image side, and a corrective lens group interposed between the front and rear lens groups. The corrective lens group is axially movable and comprises a pair of meniscus lens elements each of which having a convex surface oriented toward each other. The corrective lens group serves to correct aberrations arising from a cover glass or other refractive body situated between the specimen being observed and the objective lens. To such end, the objective preferably satisfies the conditions: