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:
Apr. 16, 2002
Filed:
Sep. 08, 1999
Sakashi Ohtaki, Tsurugashima, JP;
Ikuya Kikuchi, Tsurugashima, JP;
Pioneer Corporation, Tokyo, JP;
Abstract
An optical pickup includes a light source for emitting more than two light beams whose wavelengths are different from each other, and an objective lens including a first lens and a second lens. The first lens is a lens for collecting each light beam onto a recording medium. The second lens is a lens for compensating chromatic aberration in the light beams. The second lens is placed on the first lens in contact and is located across the optical path of each light beam. The absolute value of the difference between the Abbe number of the first lens and the Abbe number of the second lens is greater than 10.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile