Title:
An optical pickup and an optical recording and reproducing device
Document Type and Number:
Japanese Patent JP5957737
Kind Code:
B2
Abstract:
An exemplary optical pickup comprises: first, second and third photosensitive elements which are arranged to respectively receive a main light beam and first and second sub-light beams reflected from an optical storage medium; and fourth and fifth photosensitive elements which are arranged to receive the rest of the light that has also been emitted from a light source but has not been reflected from the optical storage medium. A signal that has been written on the optical storage medium with the main light beam for writing is read by performing an arithmetic operation on the signal output of the second or third photosensitive element and that of the fourth photosensitive element.
Inventors:
Tomoaki Tojo
Yoichi Saito
Kazuo Momoo
Yoichi Saito
Kazuo Momoo
Application Number:
JP2012169054A
Publication Date:
July 27, 2016
Filing Date:
July 31, 2012
Export Citation:
Assignee:
Panasonic IP Management Co., Ltd.
International Classes:
G11B7/005; G11B7/0045; G11B7/1263; G11B7/1267; G11B7/135
Domestic Patent References:
| JP10162400A | ||||
| JP2009004004A | ||||
| JP6150358A | ||||
| JP2007066469A | ||||
| JP2003059083A | ||||
| JP2010044859A | ||||
| JP2008262660A |
Attorney, Agent or Firm:
Seiji Okuda
Osamu Kita
Michi Kajitani
Akiko Miyake
Hidetaka Okabe
Tohru Kawakita
Osamu Kita
Michi Kajitani
Akiko Miyake
Hidetaka Okabe
Tohru Kawakita
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