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. 06, 2014
Filed:
Dec. 21, 2012
Olympus Medical Systems Corp., Tokyo, JP;
Akari Kanazawa, Tokyo, JP;
Tsutomu Igarashi, Tokyo, JP;
Olympus Medical Systems Corp., Tokyo, JP;
Abstract
An endoscope objective optical system includes, in order from an object side, a first lens composed of a negative single lens, a second lens composed of a positive single lens, an aperture stop, a third lens composed of a positive single lens, and a fourth lens composed of a positive combined lens, the third lens having a meniscus shape having a convex surface facing the image side. The endoscope objective optical system satisfies the following conditions:0.3<<1.15,  (1)1<1.79,  (2)2>1,  (3)0.6<<0.83,  (4)and|1|−|2|+1>1.8  (5)Df is the distance from a surface of the first lens facing the object side to the aperture stop, f is the focal length of the entire system, IH is the maximum image height of the entire system, and d1 is the center thickness of the third lens.