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. 11, 1996
Filed:
Dec. 19, 1994
Hae-jin Lee, Kyeongsangnam-do, KR;
SamSung Aerospace Industries, Ltd., Kyeongsangnam-do, KR;
Abstract
A wide angle zoom lens system. A first lens group has a positive refractive power, while a second lens group has a negative refractive power. The distance between the first lens group and the second lens group is changed during zooming. The first lens group includes a front group having a negative refractive power and a rear group having a positive refractive power. The front group includes a meniscus lens which is concave toward the object and has a negative refractive power, and the rear group includes at least four lenses which have positive or negative refractive powers, wherein 4.5<.vertline.f.sub.F /f.sub.W .vertline.<13; 0.005<.vertline.K/f.sub.F .vertline.<0.07; and 20<.vertline.(f.sub.bW .multidot.f.sub.F)/f.sub.W .vertline.<100 where f.sub.F is the focal length of the front group of the first lens group, f.sub.W is the focal length of the zoom lens at a wide angle position, K is the distance along an optical axis from the surface of the lens closest to the image plane to a rear principal point in the first lens group; and f.sub.bW is the back focus distance at the wide angle position.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile