JP2005327398A5 - - Google Patents

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Publication number
JP2005327398A5
JP2005327398A5 JP2004145641A JP2004145641A JP2005327398A5 JP 2005327398 A5 JP2005327398 A5 JP 2005327398A5 JP 2004145641 A JP2004145641 A JP 2004145641A JP 2004145641 A JP2004145641 A JP 2004145641A JP 2005327398 A5 JP2005327398 A5 JP 2005327398A5
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Japan
Prior art keywords
refractive power
objective lens
lens group
collimating
variable element
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Pending
Application number
JP2004145641A
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Japanese (ja)
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JP2005327398A (en
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Priority to JP2004145641A priority Critical patent/JP2005327398A/en
Priority claimed from JP2004145641A external-priority patent/JP2005327398A/en
Publication of JP2005327398A publication Critical patent/JP2005327398A/en
Publication of JP2005327398A5 publication Critical patent/JP2005327398A5/ja
Pending legal-status Critical Current

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Claims (6)

レーザ光を出射する光源と、
上記光源より出射されたレーザ光を平行にする1枚以上のコリメートレンズ群と、
アパーチャを介して入射された上記コリメートレンズ群によって平行光とされたレーザ光を光ディスクの信号記録面に集光する1枚以上の対物レンズ群と、
上記コリメートレンズ群と上記対物レンズ群との間であって、上記対物レンズ群の直前に設けられた上記アパーチャと同位置又は近接した位置に配設され、屈折力を可変することにより上記対物レンズ群の焦点距離を変える屈折力可変素子とを備えることを特徴とする光ピックアップ。
A light source that emits laser light;
One or more collimating lens groups for collimating the laser light emitted from the light source;
One or more objective lens groups for condensing the laser beam that has been collimated by the collimating lens group incident through the aperture onto the signal recording surface of the optical disc;
The objective lens is disposed between the collimating lens group and the objective lens group, at the same position as or close to the aperture provided immediately before the objective lens group, and by changing a refractive power. An optical pickup comprising: a refractive power variable element that changes a focal length of the group.
上記屈折力可変素子は、液晶素子を用いることを特徴とする請求項1記載の光ピックアップ。   2. The optical pickup according to claim 1, wherein the refractive power variable element is a liquid crystal element. 上記屈折力可変素子は、液体レンズを用いることを特徴とする請求項1記載の光ピックアップ。   2. The optical pickup according to claim 1, wherein the refractive power variable element uses a liquid lens. 光ディスクを回転駆動するディスク回転駆動手段と、
上記光ディスクに対して情報信号の書き込み及び/又は読み出しを行う光ピックアップとを備えた光ディスク装置において、
上記光ピックアップは、
レーザ光を出射する光源と、
上記光源より出射されたレーザ光を平行にする1枚以上のコリメートレンズ群と、
アパーチャを介して入射された上記コリメートレンズ群によって平行光とされたレーザ光を上記光ディスクの信号記録面に集光する1枚以上の対物レンズ群と、
上記コリメートレンズ群と上記対物レンズ群との間であって、上記対物レンズ群の直前に設けられた上記アパーチャと同位置又は近接した位置に配設され、屈折力を可変することにより上記対物レンズ群の焦点距離を変える屈折力可変素子とを備えることを特徴とする光ディスク装置。
A disk rotation driving means for rotating the optical disk;
In an optical disc apparatus provided with an optical pickup for writing and / or reading information signals on the optical disc,
The above optical pickup
A light source that emits laser light;
One or more collimating lens groups for collimating the laser light emitted from the light source;
One or more objective lens groups for condensing the laser beam that has been collimated by the collimating lens group incident through the aperture onto the signal recording surface of the optical disc;
The objective lens is disposed between the collimating lens group and the objective lens group, at the same position as or close to the aperture provided immediately before the objective lens group, and by changing a refractive power. An optical disc apparatus comprising: a refractive power variable element that changes a focal length of a group.
上記屈折力可変素子は、液晶素子を用いることを特徴とする請求項4記載の光ディスク装置。   5. The optical disk apparatus according to claim 4, wherein the refractive power variable element uses a liquid crystal element. 上記屈折力可変素子は、液体レンズを用いることを特徴とする請求項4記載の光ディスク装置。   5. The optical disk apparatus according to claim 4, wherein the refractive power variable element uses a liquid lens.
JP2004145641A 2004-05-14 2004-05-14 Optical pickup Pending JP2005327398A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2004145641A JP2005327398A (en) 2004-05-14 2004-05-14 Optical pickup

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2004145641A JP2005327398A (en) 2004-05-14 2004-05-14 Optical pickup

Publications (2)

Publication Number Publication Date
JP2005327398A JP2005327398A (en) 2005-11-24
JP2005327398A5 true JP2005327398A5 (en) 2007-06-28

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Family Applications (1)

Application Number Title Priority Date Filing Date
JP2004145641A Pending JP2005327398A (en) 2004-05-14 2004-05-14 Optical pickup

Country Status (1)

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JP (1) JP2005327398A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100074077A1 (en) * 2006-10-18 2010-03-25 Ryuichi Katayama Optical head device and optical information recording/reproducing device

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