Title:
角度多重したピットを記録する装置
Document Type and Number:
Japanese Patent JP4432889
Kind Code:
B2
Abstract:
The present invention relates to an apparatus for recording angular multiplexed pits on optical recording media using a device 1 for generating a light beam with an asymmetric intensity distribution. According to the invention, the device 1 for generating a light beam with an asymmetric intensity distribution has at least one light influencing part 3 for introducing a phase shift of 180° in a first half of the light beam relative to the second half of the light beam, wherein the border between the first half of the light beam and the second half of the light beam is rotatable around an optical axis of the light beam.
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Inventors:
Yoahim Knittel
Hartmut Richter
Stephan Knapmann
Hartmut Richter
Stephan Knapmann
Application Number:
JP2005347556A
Publication Date:
March 17, 2010
Filing Date:
December 01, 2005
Export Citation:
Assignee:
Thomson Licensing
International Classes:
G11B7/0045; G11B7/0065; G11B7/125; G11B7/135; G11B7/24088
Domestic Patent References:
| JP9120538A | ||||
| JP4192142A | ||||
| JP10112075A | ||||
| JP4038720A | ||||
| JP2177023A |
Foreign References:
| EP1667128A1 | ||||
| EP1667129A1 |
Attorney, Agent or Firm:
Keiichi Yamamoto