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:
Jul. 07, 2009
Filed:
May. 04, 2006
Osamu Koyama, Tokyo, JP;
Osamu Koyama, Tokyo, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
Provided is an optical information recording/reproduction apparatus in which a tilt margin in a radial direction of an optical disk is increased to thereby reduce a danger that the optical disk and a solid immersion lens come into contact with each other as compared with a conventional case. The optical information recording/reproduction apparatus of the present invention includes: an objective lens for condensing a light beam from a light source; and a solid immersion lens (SIL) that is disposed between the objective lens and an optical recording medium, in which a shape of a bottom surface of the SIL on a recording medium side of the SIL is formed such that a length of the bottom surface in a radial direction orthogonal to a track direction of the recording medium is shorter than a length of the bottom surface in the track direction.