Title:
An optical pickup and an optical recording and reproducing device
Document Type and Number:
Japanese Patent JP6032634
Kind Code:
B2
Abstract:
In one embodiment, an optical pickup includes an optical system which forms multiple light beams based on the light emitted from a light source and which converges a write beam and a read beam, thereby forming a main spot and a sub-spot, respectively, on an optical storage medium. This optical system converges the write and read beams onto the optical storage medium so that the main spot moves through the same region on the optical storage medium ahead of the sub-spot. The optical pickup further includes a detector for sensing the write and read beams reflected from the storage medium. The detector includes a first photodiode 10 that receives the reflected light from the main spot 50R on the storage medium and a second photodiode 11 that receives a portion of the reflected light from the sub-spot 51R.
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Inventors:
Yuichi Takahashi
Kazuo Momoo
Junichi Asada
Kazuo Momoo
Junichi Asada
Application Number:
JP2012085501A
Publication Date:
November 30, 2016
Filing Date:
April 04, 2012
Export Citation:
Assignee:
Panasonic IP Management Co., Ltd.
International Classes:
G11B7/135; G11B7/005; G11B7/09
Domestic Patent References:
| JP63249939A | ||||
| JP62243138A | ||||
| JP11283252A | ||||
| JP8045078A | ||||
| JP5101420A | ||||
| JP6068515A | ||||
| JP9035320A | ||||
| JP9054974A | ||||
| JP8124159A |
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