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:
Aug. 04, 2015
Filed:
Mar. 03, 2014
Olympus Medical Systems Corp., Tokyo, JP;
Nobuhiko Sone, Tokyo, JP;
OLYMPUS MEDICAL SYSTEM CORP., Tokyo, JP;
Abstract
Manufacturing errors are suppressed, a variable magnification function is provided, and good observation with aberrations appropriately corrected is performed. Provided is an endoscope objective lens including, in order from an object side, a positive first lens group, a negative second lens group, and a positive third lens group, in which the first lens group has a meniscus lens; and a normal observation state (wide angle end) and a magnifying observation state (telephoto end) can be switched between by moving the second lens group on the optical axis, and the following conditions are satisfied;−9<<−3.54.5<||<8.3where frepresents the focal distance of the meniscus lens, frepresents the entire focal distance for the normal observation, and frepresents the focal distance of the second lens group.