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. 26, 1985
Filed:
Apr. 21, 1983
Yasumasa Sunaga, Iwatsuki, JP;
Fuji Photo Optical Co., Ltd., Ohmiya, JP;
Abstract
A variable focal length lens adapter is attached to an endoscope at its eyepiece. The lens adapter includes a lens system constituting a variable focal length lens system in combination with the eyepiece. The lens system of the lens adapter is composed of a negative lens group located next to the eyepiece, a positive lens group located next to the negative lens group and a second negative lens group located next to the positive lens group on the side opposite to the first negative lens group. The first negative lens group and the positive lens group are axially movable to vary the focal length of the total lens system of the adapter. The last negative lens is used as a diopter adjusting lens.