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. 01, 2000
Filed:
Feb. 26, 1996
Makoto Sekita, Kanagawa-ken, JP;
Tsunefumi Tanaka, Kanagawa-ken, JP;
Toshiya Kurihashi, Tokyo, JP;
Shigeo Ogura, Tokyo, JP;
Keisuke Araki, Kanagawa-ken, JP;
Nobuhiro Takeda, Kanagawa-ken, JP;
Yoshihiro Uchino, Fukuoka-ken, JP;
Kenichi Kimura, Kanagawa-ken, JP;
Toshikazu Yanai, Kanagawa-ken, JP;
Norihiro Nanba, Kanagawa-ken, JP;
Hiroshi Saruwatari, Kanagawa-ken, JP;
Takeshi Akiyama, Kanagawa-ken, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A zoom lens comprises a plurality of optical elements each of which includes a transparent body having two refracting surfaces and a plurality of reflecting surfaces and is arranged so that a light beam enters the transparent body from one of the two refracting surfaces, repeatedly undergoes reflection, and exits from the other of the two refracting surfaces, and/or a plurality of optical elements on each of which a plurality of reflecting surfaces made from front surface mirrors are integrally formed, and each of which is arranged so that an entering light beam repeatedly undergoes reflection by the plurality of reflecting surfaces and exits from the optical element. In the zoom lens, the optical element which the light beam from an object enters first has an entrance pupil positioned on an object side of a first reflecting surface, and an image of the object is formed via the plurality of optical elements and zooming is performed by causing at least two optical elements from among the plurality of optical elements to vary their relative positions.