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. 27, 2001
Filed:
Jul. 20, 1999
Akiyoshi Tochigi, Hachioji, JP;
Olympus Optical Co., Ltd., Tokyo, JP;
Abstract
An image pickup lens system which comprises a first positive lens unit and a second negative lens unit in order from the object side, and is configured to change a magnification by varying an airspace reserved between the first lens unit and the second lens unit, wherein the first lens unit comprises, in order from the object side, a plastic lens element having a weak refractive power, a negative glass lens element and a positive glass lens element, and wherein the second lens unit comprises, in order form the object side, a plastic lens element having a weak refractive power and a plastic lens element having a negative refractive power; the lens system is compact and light in weight, has performance which is varied little by changes in temperature and humidity, and can be manufactured at a low cost. Furthermore, a compact camera which is equipped with the image pickup lens system.