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. 17, 2002
Filed:
Mar. 28, 2001
Yasushi Yamamoto, Kishiwada, JP;
Minolta Co., Ltd, Osaka, JP;
Abstract
An optical device has zoom lens system comprised of plurality of lens units which achieves zooming by varying unit-to-unit distances and an image sensor that converts optical image formed by zoom lens system into an electrical signal. The zoom lens system is comprised of, from the object side, at least first lens unit having a negative optical power and second lens unit having a positive optical power. Following conditional formulae are fulfilled: 2<|f1/fw|<4, and 0.058<(tan &ohgr;w) ×fw/TLw<0.9, where f1 represents focal length of first lens unit, fw represents focal length of entire optical system at wide-angle end, tan &ohgr;w represents half view angle at wide-angle end, and TLw represents total length (the distance from first vertex to image plane) at wide-angle end.