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:
Jun. 01, 1993
Filed:
Jul. 08, 1991
Yasuzi Ogata, Akikawa, JP;
Olympus Optical Co., Ltd., Tokyo, JP;
Abstract
A variable focal length lens system having, in the order from the object side, a first positive lens unit, a second positive lens unit and a third negative lens unit. In order to vary the focal length from the wide position to the tele position, the first positive lens unit and the third negative lens unit are moved jointly or independently toward the object side while the second positive lens unit is moved toward the object side at a lower speed than the first and third lens units. The variable focal length lens system satisfies the following conditions:
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