Title:
【発明の名称】固体光ピツクアツプ
Document Type and Number:
Japanese Patent JP2539406
Kind Code:
B2
Abstract:
An optical pickup comprising a semiconductor laser, a first waveguide for leading light emitted by the semiconductor laser to recording medium and coupling again light returning from the recording medium; splitting element for separating the light returning from the recording medium from the first waveguide path; and a second waveguide propagating light returning from the recording medium and separated by the splitting element; wherein light going towards the recording medium and light returning from the recording medium propagate separately in the first and the second waveguide so that the utilization efficiency of the light is increased.
Inventors:
ISHIKAWA SACHIKO
ARIMOTO AKIRA
ARIMOTO AKIRA
Application Number:
JP2230887A
Publication Date:
October 02, 1996
Filing Date:
February 04, 1987
Export Citation:
Assignee:
HITACHI LTD
International Classes:
G02B6/122; G11B7/135; G11B7/1384; (IPC1-7): G11B7/135; G02B6/122
Domestic Patent References:
| JP63117337A | ||||
| JP60202553A | ||||
| JP60195985A |
Attorney, Agent or Firm:
Katsuo Ogawa (1 person outside)