JP2005251271A5 - - Google Patents
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- Publication number
- JP2005251271A5 JP2005251271A5 JP2004059220A JP2004059220A JP2005251271A5 JP 2005251271 A5 JP2005251271 A5 JP 2005251271A5 JP 2004059220 A JP2004059220 A JP 2004059220A JP 2004059220 A JP2004059220 A JP 2004059220A JP 2005251271 A5 JP2005251271 A5 JP 2005251271A5
- Authority
- JP
- Japan
- Prior art keywords
- information recording
- objective lens
- transparent substrate
- reproducing apparatus
- light beam
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 230000003287 optical effect Effects 0.000 claims 12
- 239000000758 substrate Substances 0.000 claims 8
- 230000002093 peripheral effect Effects 0.000 claims 1
Claims (8)
前記情報記録面は前記透明基板の前記対物レンズから遠い面上に設けられていて、前記透明基板の前記情報記録面よりも前記対物レンズに近い面からの反射光束を第二の光検出器上に導く光学系と、前記第二の光検出器上に導かれた光束から前記透明基板の対物レンズに対する相対傾きを検知し、チルト信号を生成する手段とを備えたことを特徴とする光情報記録再生装置。 Information is recorded or reproduced by condensing a light spot on a recording medium having an information recording surface on a transparent substrate, and a light source and a light beam from the light source are condensed on the information recording surface. An objective lens, an optical system that guides the returned light beam from the information recording surface onto the first photodetector, and a servo signal or information that follows the track of the recording medium from the light beam guided onto the first photodetector. In an optical information recording / reproducing apparatus comprising means for generating a reproduction signal,
The information recording surface is provided on a surface of the transparent substrate far from the objective lens, and a reflected light beam from a surface closer to the objective lens than the information recording surface of the transparent substrate is reflected on the second photodetector. And an optical system for detecting the relative tilt of the transparent substrate with respect to the objective lens from the light beam guided onto the second photodetector, and generating a tilt signal. Recording / playback device.
(M/f1)×{2×t/n×(f1−d)−f12}≦150〔mm〕
の関係が成り立つことを特徴とする請求項1に記載の光情報記録再生装置。 The focal length of the objective lens is f1, the thickness of the transparent substrate is t, the refractive index of the transparent substrate is n, and a reflected light beam from a surface closer to the objective lens than the objective lens and the information recording surface is detected as a second light. If M lateral magnification which is determined from the sensor lens included in the optical system for guiding on the vessel, the optical distance between said objective lens said Sensaren's is d,
(M / f1) × {2 × t / n × (f1-d) −f1 2 } ≦ 150 [mm]
The optical information recording / reproducing apparatus according to claim 1, wherein:
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004059220A JP2005251271A (en) | 2004-03-03 | 2004-03-03 | Optical information recording and reproducing apparatus |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004059220A JP2005251271A (en) | 2004-03-03 | 2004-03-03 | Optical information recording and reproducing apparatus |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2005251271A JP2005251271A (en) | 2005-09-15 |
JP2005251271A5 true JP2005251271A5 (en) | 2006-12-28 |
Family
ID=35031601
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2004059220A Withdrawn JP2005251271A (en) | 2004-03-03 | 2004-03-03 | Optical information recording and reproducing apparatus |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2005251271A (en) |
-
2004
- 2004-03-03 JP JP2004059220A patent/JP2005251271A/en not_active Withdrawn
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