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:
Sep. 15, 1992
Filed:
Mar. 29, 1991
Olympus Optical Co., Ltd., Tokyo, JP;
Abstract
A compact zoom lens system comprising, in the order from the object side, a first lens unit having a positive refractive power, an aperture stop, a second lens unit having a positive refractive power and a third lens unit having a negative refractive power; and adapted so as to perform variation of focal length from the wide position to the tele position by moving the first lens unit and the third lens unit from the image side toward the object side, and displacing the second lens unit and the aperture stop so as to widen the airspace reserved between the first lens unit and the second lens unit, and narrow the airspace reserved between the second lens unit and the third lens unit. This zoom lens system has a total length shortened by thinning the first lens unit.