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:
Nov. 06, 2012
Filed:
Nov. 22, 2010
Norihiro Tanabe, Kanagawa, JP;
Kimihiro Saito, Kanagawa, JP;
Takahiro Miura, Kanagawa, JP;
Yojiro Sumi, Kanagawa, JP;
Noriaki Nishi, Kanagawa, JP;
Norihiro Tanabe, Kanagawa, JP;
Kimihiro Saito, Kanagawa, JP;
Takahiro Miura, Kanagawa, JP;
Yojiro Sumi, Kanagawa, JP;
Noriaki Nishi, Kanagawa, JP;
Sony Corporation, Tokyo, JP;
Abstract
A pickup apparatus includes a light source; a light separator; an object lens that concentrates the light which penetrated the light separator on the optical recording medium; a movable lens; and a light sensing element that receives the reflected light from the optical recording medium separated by the light separator, wherein a coma aberration generated by the transverse shift of the object lens is corrected by a coma aberration which is generated by the deviation of a spherical aberration generated in an optical path from the light source to the object lens and a spherical aberration generated in an optical path from the object lens to a light concentration position on the optical recording medium which are due to the transverse shift.