Invention Application
- Patent Title: Optical information reproducing apparatus and optical information recording/reproducing apparatus
- Patent Title (中): 光信息再现装置和光信息记录/重放装置
-
Application No.: US10641072Application Date: 2003-08-15
-
Publication No.: US20040037196A1Publication Date: 2004-02-26
- Inventor: Kozo Matsumoto , Hideyoshi Horimai , Wataru Kubo , Suguru Takishima
- Applicant: OPTWARE CORPORATION , PENTAX CORPORATION
- Applicant Address: JP Yokohama-shi JP Itabashi-ku
- Assignee: OPTWARE CORPORATION,PENTAX CORPORATION
- Current Assignee: OPTWARE CORPORATION,PENTAX CORPORATION
- Current Assignee Address: JP Yokohama-shi JP Itabashi-ku
- Priority: JP2002-244726 20020826
- Main IPC: G11B007/00
- IPC: G11B007/00

Abstract:
To record information, a recording/reproducing optical system in an optical head irradiates a recording medium with information light and reference light for recording so that two-dimensional image information is recorded on the recording medium by means of interference between the information light and the reference light for recording. To reproduce information, the recording/reproducing optical system irradiates the recording medium with reference light for reproduction, and collects and detects reproduction light occurring from the recording medium. An optical information recording/reproducing apparatus comprises a tilt detector and an image deviation correction circuit. The tilt detector detects a tilt of the recording medium with respect to a predetermined reference position. Based on the output signal of the tilt detector, the image deviation correction circuit moves a lens which constitutes part of the optical system in the optical head, thereby correcting a displacement between a solid state image pick-up device in the optical head and the image of the reproduction light incident on the solid state image pick-up device.
Information query