JP2006053994A5 - - Google Patents

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Publication number
JP2006053994A5
JP2006053994A5 JP2004234574A JP2004234574A JP2006053994A5 JP 2006053994 A5 JP2006053994 A5 JP 2006053994A5 JP 2004234574 A JP2004234574 A JP 2004234574A JP 2004234574 A JP2004234574 A JP 2004234574A JP 2006053994 A5 JP2006053994 A5 JP 2006053994A5
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JP
Japan
Prior art keywords
optical
information recording
laser light
recording surface
optical pickup
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Pending
Application number
JP2004234574A
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Japanese (ja)
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JP2006053994A (en
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Priority to JP2004234574A priority Critical patent/JP2006053994A/en
Priority claimed from JP2004234574A external-priority patent/JP2006053994A/en
Publication of JP2006053994A publication Critical patent/JP2006053994A/en
Publication of JP2006053994A5 publication Critical patent/JP2006053994A5/ja
Pending legal-status Critical Current

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Claims (3)

レーザ光源から出射されるレーザ光を、互いに基盤厚が異なる同一フォーマットで情報が記録された第1及び第2の光ディスクのいずれか一方の情報記録面に照射し、当該情報記録面で変調された上記レーザ光の光量変化を検出するようになされた光ピックアップにおいて、
上記レーザ光の光路上に設けられ、上記第1及び第2の光ディスクの基盤厚の中間値を基盤厚とする仮想ディスクの情報記録面に生じる球面収差を最適化するように、レンズ面の形状が設定された対物レンズ
を具えることを特徴とする光ピックアップ。
Laser light emitted from a laser light source is irradiated onto one of the information recording surfaces of the first and second optical discs on which information is recorded in the same format with different base thicknesses, and modulated by the information recording surface. In an optical pickup adapted to detect a change in the amount of laser light,
The shape of the lens surface is optimized so as to optimize the spherical aberration generated on the information recording surface of the virtual disk provided on the optical path of the laser beam and having a base thickness that is an intermediate value between the base thicknesses of the first and second optical disks. An optical pickup characterized by comprising an objective lens set with.
上記第1の光ディスクの基盤厚が0.9〔mm〕であり、上記第2の光ディスクの基盤厚が1.2〔mm〕である場合には、上記仮想ディスクの基盤厚を、1.0〔mm〕以上1.2〔mm〕未満の範囲内で設定するようにした
ことを特徴とする請求項1に記載の光ピックアップ。
When the base thickness of the first optical disk is 0.9 [mm] and the base thickness of the second optical disk is 1.2 [mm], the base thickness of the virtual disk is set to 1.0 [mm] or more and 1.2 [mm]. The optical pickup according to claim 1, wherein the optical pickup is set within a range of less than [mm].
互いに基盤厚が異なる同一フォーマットで情報が記録された第1及び第2の光ディスクと、レーザ光源から出射されるレーザ光を、上記第1及び第2の光ディスクのいずれか一方の情報記録面に照射し、当該情報記録面で変調された上記レーザ光の光量変化を検出するようになされた光ピックアップとからなる光ディスク装置において、Irradiate the information recording surface of one of the first and second optical discs with the first and second optical discs on which information is recorded in the same format with different substrate thicknesses and the laser light source. In an optical disc device comprising an optical pickup adapted to detect a change in the amount of laser light modulated on the information recording surface,
上記光ピックアップは、The above optical pickup
上記レーザ光の光路上に設けられ、上記第1及び第2の光ディスクの基盤厚の中間値を基盤厚とする仮想ディスクの情報記録面に生じる球面収差を最適化するように、レンズ面の形状が設定された対物レンズThe shape of the lens surface is optimized so as to optimize the spherical aberration generated on the information recording surface of the virtual disk provided on the optical path of the laser beam and having a base thickness that is an intermediate value between the base thicknesses of the first and second optical disks. Objective lens set with
を具えることを特徴とする光ディスク装置。An optical disc apparatus comprising:
JP2004234574A 2004-08-11 2004-08-11 Optical pickup Pending JP2006053994A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2004234574A JP2006053994A (en) 2004-08-11 2004-08-11 Optical pickup

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2004234574A JP2006053994A (en) 2004-08-11 2004-08-11 Optical pickup

Publications (2)

Publication Number Publication Date
JP2006053994A JP2006053994A (en) 2006-02-23
JP2006053994A5 true JP2006053994A5 (en) 2007-07-05

Family

ID=36031372

Family Applications (1)

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JP2004234574A Pending JP2006053994A (en) 2004-08-11 2004-08-11 Optical pickup

Country Status (1)

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JP (1) JP2006053994A (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4797796B2 (en) * 2006-05-25 2011-10-19 株式会社ケンウッド Optical disc playback apparatus, optical disc playback method, and optical disc playback program
CN114153014A (en) * 2016-09-13 2022-03-08 脸谱科技有限责任公司 Fresnel lens with dynamic draft for reducing optical artifacts
JP7001345B2 (en) * 2017-01-17 2022-02-03 マクセルフロンティア株式会社 Diffractive lens and in-vehicle lamp using it

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