Title:
対物レンズホルダー、それを備えた対物レンズ駆動装置、及び光ディスク記録再生装置
Document Type and Number:
Japanese Patent JP4050271
Kind Code:
B2
Abstract:
An objective lens holder of the present invention includes: (i) a cavity, having an entrance and an exit, which guides, to an objective lens, an incident light beam entering the entrance, the exit being provided on a side of the cavity where the objective lens is housed; and (ii) an aperture having an opening for limiting, to an effective diameter of the objective lens, a beam diameter of the incident light beam passing through the cavity. The cavity is surrounded with internal wall surfaces facing each other so that space between the internal wall surfaces gradually increases from the opening of the aperture toward the entrance or the exit. This makes it possible to provide a highly rigid objective lens holder that allows high speed read/write operations.
Inventors:
Toshiharu Inui
Takashi Kono
Takashi Kono
Application Number:
JP2004354584A
Publication Date:
February 20, 2008
Filing Date:
December 07, 2004
Export Citation:
Assignee:
Sharp Corporation
International Classes:
G11B7/12; G11B7/09
Domestic Patent References:
| JP62133220U | ||||
| JP2000011440A | ||||
| JP9326128A | ||||
| JP3147535A | ||||
| JP2000235719A | ||||
| JP8221788A | ||||
| JP2001319350A |
Attorney, Agent or Firm:
Kenzo Hara International Patent Office
Kenzo Hara
Ryuichi Kijima
Ichiro Kaneko
Kenzo Hara
Ryuichi Kijima
Ichiro Kaneko