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:
Jan. 18, 2011
Filed:
Apr. 11, 2008
Tetsuya Yanai, Hachioji, JP;
Masahito Watanabe, Hachioji, JP;
Kazuteru Kawamura, Hachioji, JP;
Olympus Imaging Corp., Tokyo, JP;
Abstract
The invention relates to an optical system that is capable of providing a zoom lens having improved image-formation capability with a reduced number of lenses, and fabricating a slim yet high-performance digital or video camera. The optical system comprises a cemented lens having a cementing surface on its optical axis. Air contact surfaces on the light ray entrance and exit sides of the cemented lens Gare aspheric, and at least one cementing surface in the cemented lens Gsatisfies condition (1).6.4<|()|  (1)Here r is the axial radius of curvature of the cementing surface, and R is the maximum diameter of the cementing surface.