JPS63164030A - Objective lens driver - Google Patents
Objective lens driverInfo
- Publication number
- JPS63164030A JPS63164030A JP61314954A JP31495486A JPS63164030A JP S63164030 A JPS63164030 A JP S63164030A JP 61314954 A JP61314954 A JP 61314954A JP 31495486 A JP31495486 A JP 31495486A JP S63164030 A JPS63164030 A JP S63164030A
- Authority
- JP
- Japan
- Prior art keywords
- objective lens
- light source
- lens holder
- signal
- coil
- 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.)
- Pending
Links
- 238000012544 monitoring process Methods 0.000 abstract description 2
- 230000003287 optical effect Effects 0.000 description 6
- 239000000463 material Substances 0.000 description 3
- 230000001133 acceleration Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
- G11B7/085—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam into, or out of, its operative position or across tracks, otherwise than during the transducing operation, e.g. for adjustment or preliminary positioning or track change or selection
- G11B7/08505—Methods for track change, selection or preliminary positioning by moving the head
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
- G11B7/09—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
- G11B7/0946—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following specially adapted for operation during external perturbations not related to the carrier or servo beam, e.g. vibration
Landscapes
- Optical Recording Or Reproduction (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は光により微細な信号の読み出し又は書き込み
のための光学ヘッドに係わり、例えばＣＤプレーヤ、光
ファイル装置等に用いられる対物レンズ駆動装置に関す
るものである。Detailed Description of the Invention [Field of Industrial Application] The present invention relates to an optical head for reading or writing minute signals using light, and relates to an objective lens driving device used for example in a CD player, an optical file device, etc. It is something.
ＣＤプレーヤや光ファイル装置等で、対物レンズを一軸
方向或いは二輪方向に駆動する対物レンズ駆動装置に光
源と光検出素子とを備えて対物レンズの位置をモニタす
ることにより、高速アクセス時の対物レンズのふらつき
をなくして即座に情報が読み込めるようにしたり、又対
物レンズの動きを最適状態で制御できるようにする。In CD players, optical file devices, etc., the objective lens driving device that drives the objective lens in one axis direction or two wheel directions is equipped with a light source and a light detection element to monitor the position of the objective lens. To eliminate the fluctuation of information so that information can be read immediately, and to control the movement of an objective lens in an optimal state.
第２図Ａは従来の対物レンズ駆動装置の上面図、同図Ｂ
はそのＥ−Ｅ断面図である。第２凹入で対物レンズ１は
対物レンズ保持体２に固定され、同じく２に固定された
フォーカスコイル３及び４個のトラッキングコイル４が
ヨーク７及び磁石８からなる磁気間隙中ム装置かれ、２
はガイド軸に嵌合している。対物レンズ保持体２は図示
していないゴムばねや磁気ばね等により支持されている
。フォーカスコイル３及びトラッキングコイル４に外部
より各々フォーカス信号、トラッキング信号を供給する
と、電磁気学的にガイド軸方向の力とガイド軸を中心と
する偶力を発生し、対物レンズ保持体２を光軸方向Ｆ（
以下フォーカス方向と記す）及び光軸と直交方向Ｔ（以
下ラジアル方向と記す）に動かすことができる。Figure 2A is a top view of a conventional objective lens drive device, and Figure 2B is a top view of a conventional objective lens drive device.
is a sectional view taken along line E-E. The objective lens 1 is fixed to the objective lens holder 2 by the second recess, and a focus coil 3 and four tracking coils 4, which are also fixed to the objective lens holder 2, are placed in a magnetic gap consisting of a yoke 7 and a magnet 8.
is fitted to the guide shaft. The objective lens holder 2 is supported by a rubber spring, a magnetic spring, etc. (not shown). When a focus signal and a tracking signal are supplied to the focus coil 3 and the tracking coil 4 from the outside, respectively, a force in the direction of the guide axis and a couple force centered on the guide axis are generated electromagnetically, and the objective lens holder 2 is aligned with the optical axis. Direction F (
It can be moved in a direction T (hereinafter referred to as a focus direction) and in a direction T perpendicular to the optical axis (hereinafter referred to as a radial direction).
上記のような対物レンズ駆動装置を光デイスク上のある
トラックから別のトラックへ高速アクセスした場合、対
物レンズ保持体の変形、ガイド軸と受部とのガタ等によ
り対物レンズの位置がずれてしまい正しい情報を読み出
すためには再びアクセスをやり直す必要があるため多大
な時間を費やしてしまう。When the objective lens driving device described above is accessed at high speed from one track to another on an optical disk, the position of the objective lens may shift due to deformation of the objective lens holder, play between the guide shaft and the receiving part, etc. In order to read the correct information, access must be made again, which takes a lot of time.
上記問題を解決するためにこの発明は、ＬＥＤ。 In order to solve the above problem, this invention uses LED.
ＬＤ、 電球等の光源とホトダイオード、ホトトラジス
タ等の光検出素子で対物レンズの位置を検出し、その（
ａ号から対物レンズが常に定位置にあるようにトラッキ
ングコイルに制御４３号を与える。The position of the objective lens is detected using a light source such as an LD or light bulb and a photodetector such as a photodiode or phototransistor, and its (
From No. a, control No. 43 is given to the tracking coil so that the objective lens is always in a fixed position.
光源から放射される光の強度分布は空間的に特定の形状
を持っており、その強さを光検出素子でモニタすること
により位置及び基準点からの移動量を知ることができる
。つまり対物レンズの位置や移動量に対応した信号が得
られるので高速アクセス時の対物レンズのふらつきをモ
ニタすることができ、その信号に応じた制御信号をトラ
ッキングコイルに与えることにより対物レンズを定位置
に固定することができる。The intensity distribution of the light emitted from the light source has a spatially specific shape, and by monitoring the intensity with a photodetection element, the position and amount of movement from the reference point can be determined. In other words, since a signal corresponding to the position and amount of movement of the objective lens can be obtained, it is possible to monitor the wobbling of the objective lens during high-speed access, and by giving a control signal corresponding to this signal to the tracking coil, the objective lens can be kept in a fixed position. can be fixed to.
以下にこの発明の実施例を図面に基づいて説明する。 Embodiments of the present invention will be described below based on the drawings.
第１図Ａは本発明の対物レンズ駆動装置の上面図、同図
ＢはそのＧ−Ｇ断面図、同図Ｃは本発明の詳細な説明す
るための原理図である。第１図Ａで対物レンズｌは対物
レンズ保持体２に固定され、同じく２に固定されたフォ
ーカスコイル３及び４個のトラッキングコイル４がヨー
ク７及び磁石８からなる磁気間隙中に置かれ、２はガイ
ド軸６に嵌合している。対物レンズ保持体２には光検出
素子ＩＯが２個固定されており、光源１）がそれに対向
して配置される。対物レンズ保持体２は図示されていな
いゴムばねや磁気ばね等により支持されている。FIG. 1A is a top view of the objective lens driving device of the present invention, FIG. 1B is a sectional view taken along the line GG, and FIG. In FIG. 1A, an objective lens l is fixed to an objective lens holder 2, and a focus coil 3 and four tracking coils 4, which are also fixed to the objective lens holder 2, are placed in a magnetic gap formed by a yoke 7 and a magnet 8. is fitted into the guide shaft 6. Two photodetecting elements IO are fixed to the objective lens holder 2, and a light source 1) is arranged opposite to them. The objective lens holder 2 is supported by a rubber spring, a magnetic spring, etc. (not shown).
フォーカスコイル３及びトラッキングコイル４に外部よ
り各々フォーカス信号、トラッキング信号を供給すると
、電磁気学的にガイド軸方向の力とガイド軸を中心とす
る偶力を発生し、対物レンズ保持体２をフォーカス方向
及び、ラジアル方向に動かすことができる。光検出素子
は光強度に比例した信号を出力するため対物レンズ保持
体がガイド軸を中心として回転すると光検出素子も一緒
に回転するためその位置の光強度を知ることができる。When a focus signal and a tracking signal are supplied to the focus coil 3 and the tracking coil 4 from the outside, respectively, a force in the direction of the guide axis and a couple force centered on the guide axis are generated electromagnetically, and the objective lens holder 2 is moved in the focus direction. and can be moved in the radial direction. The photodetector outputs a signal proportional to the light intensity, so when the objective lens holder rotates around the guide shaft, the photodetector also rotates together with it, making it possible to know the light intensity at that position.
一般にＬＥＤ、ＬＤ、電球等の光源から発せられる光強
度分布は第１図Ｃに示すような形状をしており、光検出
素子１０ａ、ｌＯｂを光強度分布曲線のほぼ直線部の位
置に配置すると１０ａ、１０ｂの出力信号の大きさは等
しくなるが、対物レンズ保持体がガイド軸を中心として
回転すると１０ａ。Generally, the light intensity distribution emitted from a light source such as an LED, LD, or light bulb has a shape as shown in FIG. The magnitudes of the output signals of 10a and 10b become equal, but when the objective lens holder rotates around the guide axis, the output signals of 10a and 10b become equal in magnitude.
１０ｂの位置も変化し、例えば第１図Ｃに示した矢印の
ように動くと１０ａの出力は増力■し、１０ｂの出力は
減少するためその差を検出すると移動量に対応した信号
を得ることができる。つまり対物レンズ駆動装置が高速
アクセスした時に生ずる対物レンズ保持体の変形、ガイ
ド軸と受部とのガタ等による対物レンズのずれ量を検出
することができ、この信号に対応した制御信号をトラッ
キングコイルに与えることにより対物レンズを定位置に
固定することができる
本実施例の特徴は対物レンズの二輪方向への運動をガイ
ド軸に沿った摺動及び軸回りの回転によって行なうとい
う点であり、対物レンズ保持体。The position of 10b also changes. For example, when it moves as shown by the arrow shown in Figure 1C, the output of 10a increases and the output of 10b decreases. If the difference is detected, a signal corresponding to the amount of movement can be obtained. I can do it. In other words, it is possible to detect the amount of deviation of the objective lens due to deformation of the objective lens holder that occurs when the objective lens drive device accesses at high speed, play between the guide shaft and the receiving part, etc., and a control signal corresponding to this signal is sent to the tracking coil. The feature of this embodiment is that the objective lens is moved in the direction of the two wheels by sliding along the guide axis and rotating around the axis. lens holder.
コイル、磁気回路等の形状・寸法・材質等に何ら拘束さ
れるものではない。There are no restrictions on the shape, size, material, etc. of the coil, magnetic circuit, etc.
第３図は本発明の対物レンズ駆動値での第２実施例であ
るが、第３図Ａは上面図、同図ＢはそのＨ−Ｈｆｔｌｉ
面図である。FIG. 3 shows a second embodiment of the objective lens drive value of the present invention. FIG. 3A is a top view, and FIG.
It is a front view.
本実施例も第１実施例と同じく対物レンズを二軸方向に
動かすものであるが、それを２組の平行ばねで行なう点
が大きく異なる。This embodiment also moves the objective lens in two axial directions like the first embodiment, but differs greatly in that this is done using two sets of parallel springs.
本実施例の構造は第３国人に示すように対物レンズ１が
対物レンズ保持体２に固定され、同じく２に固定された
フォーカスコイル３及びトラッキングコイル４がヨーク
７及び磁石８からなる磁気間隙中に置かれ、２は平行ば
ね工２及び１３で弾性的に支持される。 １２．１３は
中継板１８によって結合されており、１３の他端はヨー
クの一部に固定され可動部の全重量を支えている。対物
レンズ保持体２には光検出素子１０が２個固定されてお
り、光源１）がそれに対向して配置される。In the structure of this embodiment, an objective lens 1 is fixed to an objective lens holder 2, and a focus coil 3 and a tracking coil 4, which are also fixed to the objective lens holder 2, are placed in a magnetic gap formed by a yoke 7 and a magnet 8. 2 is elastically supported by parallel springs 2 and 13. 12 and 13 are connected by a relay plate 18, and the other end of 13 is fixed to a part of the yoke to support the entire weight of the movable part. Two photodetecting elements 10 are fixed to the objective lens holder 2, and a light source 1) is arranged opposite to them.
フォーカスコイル３及びトラッキングコイル４に外部よ
り各々フォーカス信号、トランキング信号を供給すると
、電磁気学的に第３図Ｂに示すＦ方向（フォーカス方向
）及び第３図Ａに示すＴ方向（ラジアル方向）の力を発
生し、対物レンズ保持体は１２及び１３の平行ばねによ
り上記Ｆ方向及びＴ方向の二輪方向へ動くことができる
。When a focus signal and a trunking signal are supplied to the focus coil 3 and the tracking coil 4 from the outside, respectively, electromagnetically the F direction (focus direction) shown in FIG. 3B and the T direction (radial direction) shown in FIG. 3A The objective lens holder can be moved in the direction of the two wheels in the F direction and the T direction by parallel springs 12 and 13.
従って対物レンズ保持体２に固定された光検出素子もＴ
方向へ動くので第１実施例で述べたのと同じようにその
移動量に対応した信号が得られ、その信号を処理し制御
信号としてトランキングコイルに与えることにより対物
レンズを定位置に固定することができる。Therefore, the photodetector element fixed to the objective lens holder 2 is also T
Since it moves in the direction, a signal corresponding to the amount of movement is obtained in the same way as described in the first embodiment, and the objective lens is fixed in a fixed position by processing the signal and giving it as a control signal to the trunking coil. be able to.
本実施例の特徴は対物レンズの二軸方向への案内を２組
の平行ばねによって行なっているという点であり、対物
レンズ保持体、コイル、［気回路等の形状・寸法・材質
等に何ら拘束されるものではない。The feature of this embodiment is that the objective lens is guided in two axial directions by two sets of parallel springs, and there is no difference in the shape, size, material, etc. of the objective lens holder, coil, [air circuit, etc.]. It is not binding.
第４図は本発明の対物レンズ駆動装置の第３実施例であ
るが、第４図Ａは上面図、同図ＢはそのＪ−Ｊ断面図で
ある。本実施例も第１実施例と同じく対物レンズを二軸
方向に動かすものであるが、それをＩＭＩの平行ばねに
よる並進運動と回路軸による回転で行なう点が大きく異
なる。本実施例の構造は第４国人に示すように対物レン
ズ１が対物レンズ保持体２に固定され、同じく２に固定
されたフォーカスコイル３及びトラッキングコイル４が
ヨーク７及び磁石８からなる磁気間隙中に置かれ、２は
平行ばね１２．さらに軸受１５に支持された回転軸１９
に支持される。対物レンズ保持体は図示していないゴム
ばねや磁気ばね等により支持されて回転軸回りの中立位
置が設定されると共に、トラッキングバランサ１４によ
り回転中心回りの不っりあいかないような構造になって
いる。本実施例も第１実施例と同じく光検出素子１０が
対物レンズ保持体２に固定され、光源１）がそれに対向
して配置される。FIG. 4 shows a third embodiment of the objective lens driving device of the present invention, in which FIG. 4A is a top view and FIG. 4B is a sectional view taken along line J-J. This embodiment also moves the objective lens in two axes like the first embodiment, but it differs greatly in that this is done by translation by the parallel spring of the IMI and rotation by the circuit axis. In the structure of this embodiment, an objective lens 1 is fixed to an objective lens holder 2, and a focus coil 3 and a tracking coil 4, which are also fixed to the objective lens holder 2, are placed in a magnetic gap formed by a yoke 7 and a magnet 8. 2 is a parallel spring 12. Furthermore, a rotating shaft 19 supported by a bearing 15
Supported by The objective lens holder is supported by rubber springs, magnetic springs, etc. (not shown) to set a neutral position around the rotation axis, and has a structure that prevents misalignment around the rotation center by a tracking balancer 14. There is. In this embodiment, as in the first embodiment, a photodetector element 10 is fixed to an objective lens holder 2, and a light source 1) is arranged opposite to it.
フォーカスコイル３及びトラッキングコイル４に外部よ
り各々フォーカス信号、トラッキング信号を供給すると
、電磁気学的に第４図Ｂに示すＦ方向（フォーカス方向
）及び第４図Ａに示すＴ方向（ラジアル方向）の力を発
生し、対物レンズ保持体は平行ばね１２により前記Ｆ方
向へ、回転軸１９により前記Ｔ方向へ動くことができる
。従って光検出素子１０もＴ方向へ動くので、第１実施
例と同しようにその移動量に対応した信号が得られ、対
物レンズを定位置に固定することができる。When a focus signal and a tracking signal are supplied to the focus coil 3 and the tracking coil 4 from the outside, respectively, electromagnetically the F direction (focus direction) shown in FIG. 4B and the T direction (radial direction) shown in FIG. 4A are generated. A force is generated, and the objective lens holder can be moved in the F direction by the parallel spring 12 and in the T direction by the rotation shaft 19. Therefore, since the photodetecting element 10 also moves in the T direction, a signal corresponding to the amount of movement thereof can be obtained as in the first embodiment, and the objective lens can be fixed at a fixed position.
本実施例の特徴は対物レンズの二輪方向への案内を１組
の平行ばねによる並進運動と回転軸回りの回転によって
行なっているという点であり、対物レンズ保持体、コイ
ル、磁気回路等の形状・寸法材π等に何ら拘束されるも
のではない。The feature of this embodiment is that the objective lens is guided in the direction of the two wheels by translational movement by a pair of parallel springs and rotation around the rotation axis, and the shape of the objective lens holder, coil, magnetic circuit, etc.・There is no restriction on the dimension material π etc.
以上説明したように本発明の種々の構造の対物レンズ駆
動装置に適用できるものであり、対物レンズを二輪方向
に動かす機構・手段等に関係なく例えば圧動体を用いた
もの、空気圧を用いたもの等あらゆるタイプのものに適
用できることは言うまでもない。さらに対物レンズを一
部又は三軸方向に動かす場合も、光源の光強度分布と光
検出素子の位置及び個数を選ぶことによりそれぞれの変
位量を検出することができ、その信号を処理することに
より対物レンズを定位置に固定できることはもちろん、
その信号を微分すると速度信号や加速度信号が得られる
のでこれをコイルにフィードバックすることにより対物
レンズの最適制御を実現することができる。As explained above, the present invention can be applied to objective lens drive devices with various structures, and regardless of the mechanism or means for moving the objective lens in the two-wheel direction, for example, one using a pressure moving body or one using air pressure. Needless to say, it can be applied to all types of things. Furthermore, even when moving the objective lens partially or in three axial directions, the amount of displacement can be detected by selecting the light intensity distribution of the light source and the position and number of photodetecting elements, and by processing the signals. Of course, the objective lens can be fixed in a fixed position,
Differentiating this signal yields a velocity signal and an acceleration signal, which can be fed back to the coil to achieve optimal control of the objective lens.
本実施例で光検出素子としてはホトダイオード。In this embodiment, the photodetector is a photodiode.
ホトトランジスタ等があり、素子の種類が限定されるこ
とはない。又本実施例では光検出素子はすべて対物レン
ズ保持体に固定され可動側となっているが、逆に光源を
対物レンズ保持体に固定し光検出素子を外部に取付けて
固定側にしても原理的には本実施例と同じであり問題は
ない。There are phototransistors and the like, and the type of element is not limited. Also, in this example, all the photodetecting elements are fixed to the objective lens holder and are on the movable side, but the principle also works if the light source is fixed to the objective lens holder and the photodetecting element is attached externally, making it the fixed side. This is essentially the same as this embodiment, and there is no problem.
この発明は以上説明したように、対物レンズ保持体の位
置又は変位量を光源と光検出素子とで検出しその信号を
、コイルにフィードハックすることにより、高速アクセ
ス時の対物レンズのふらつきをなくすことができ、又そ
の信号を微分して速度信号や加速度信号としてコイルに
フィードバックすれば対物レンズの動きを最適状態に制
御することができる。As explained above, this invention eliminates the wobbling of the objective lens during high-speed access by detecting the position or amount of displacement of the objective lens holder using a light source and a light detection element and feeding the signal to the coil. Furthermore, by differentiating the signal and feeding it back to the coil as a velocity signal or an acceleration signal, the movement of the objective lens can be controlled in an optimal state.
第１図Ａは本発明の対物レンズ駆動装置の上面図、第１
図Ｂは第１図ＡのＧ−Ｇ断面図、第１図Ｃは本発明の詳
細な説明するための図、第２図Ａは従来の対物レンズ駆
動装置の上面図、第２図Ｂは第２図へ〇Ｅ−Ｅ断面図、
第３図Ａは本発明の第２実施例の上面図、第３図Ｂは第
３図ＡのＨ−１）断面図、第４図Ａは本発明の第３実施
例の上面図、第４図Ｂは第４図ＡのＪ−Ｊ［？面図であ
る。
゛ １・・・対物レンズ
２・・・対物レンズ保持体
３・・・フォーカスコイル
４・・・トラッキングコイル
６・ ・ ・ガイド軸
７・・・ヨーク
８・・・磁石
９・・・バランサ
１０・・・光検出素子
１）・・・光源
１２．１３・・・平行ばね
１４・・・トラッキングバランサ
１５・・・軸受
１６・・・軸受押え
１７・・・軸受固定台
１８・・・中継板
１９・・・回転軸
以上
出願人 セイコー電子工業株式会社
木発明の対重しンズ況動に直の上面図
第１図Ａ
第１図へ〇〇−Ｇ爵面図
第１図 Ｂ
本発明の原理６８グ明Ｔるｒぐめの図
第１ 図 Ｃ
イ芝来の廿１５７レンズ馬区す６８１）［の上面図第２
図 Ａ
第２Ｉｌ￥ＩＡのＥ−Ｅ断面図
第２［￥ｌ Ｂ
本発明の第２大記例の上面図
弔３図Ａ
第３［ＺＡのｌ−１−）［ｒＩＱＩＺ
第３図 ＢFIG. 1A is a top view of the objective lens driving device of the present invention.
Figure B is a sectional view taken along line GG in Figure 1A, Figure 1C is a diagram for explaining the present invention in detail, Figure 2A is a top view of a conventional objective lens drive device, and Figure 2B is a diagram for explaining the present invention in detail. Go to Figure 2 〇E-E cross-sectional view,
3A is a top view of the second embodiment of the present invention, FIG. 3B is a sectional view taken along line H-1 in FIG. 3A, and FIG. Figure 4B is J-J [? It is a front view. 1... Objective lens 2... Objective lens holder 3... Focus coil 4... Tracking coil 6... Guide shaft 7... Yoke 8... Magnet 9... Balancer 10... ...Photodetection element 1)...Light source 12.13...Parallel spring 14...Tracking balancer 15...Bearing 16...Bearing retainer 17...Bearing fixing base 18...Relay plate 19・・・Above the rotational axis Applicant: Seiko Electronics Co., Ltd. Top view directly showing the development of the invention Figure 1 A Top view of Figure 1 Figure 1 of the 68-g light T rugume Figure C
Figure A EE-E sectional view of 2nd Il\IA No. 2
Claims (3)
された対物レンズ保持体と、前記対物レンズ保持体を並
進運動又は回転運動させるための力を発生する駆動部を
備えた対物レンズ駆動装置で、光源とそれに対向する少
なくとも１個以上の光検出素子とを配置し、その出力を
外部に取出したことを特徴とする対物レンズ駆動装置。(1) An objective lens drive device that includes an objective lens holder that holds an objective lens and is supported so as to be freely translatable or rotatable, and a drive unit that generates a force for causing the objective lens holder to move in translation or rotation. An objective lens driving device characterized in that a light source and at least one or more photodetecting elements are arranged opposite to the light source, and the output thereof is taken out to the outside.
ことを特徴とする特許請求の範囲第１項記載の対物レン
ズ駆動装置。(2) The objective lens driving device according to claim 1, wherein the photodetecting element is supported by an objective lens holder.
特徴とする特許請求の範囲第１項記載の対物レンズ駆動
装置。(3) The objective lens driving device according to claim 1, wherein the light source is supported by an objective lens holder.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61314954A JPS63164030A (en) | 1986-12-25 | 1986-12-25 | Objective lens driver |
| JP61314953A JPS63164029A (en) | 1986-12-25 | 1986-12-25 | Objective lens driver |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61314954A JPS63164030A (en) | 1986-12-25 | 1986-12-25 | Objective lens driver |
| JP61314953A JPS63164029A (en) | 1986-12-25 | 1986-12-25 | Objective lens driver |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63164030A true JPS63164030A (en) | 1988-07-07 |
Family
ID=26568124
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61314954A Pending JPS63164030A (en) | 1986-12-25 | 1986-12-25 | Objective lens driver |
| JP61314953A Pending JPS63164029A (en) | 1986-12-25 | 1986-12-25 | Objective lens driver |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61314953A Pending JPS63164029A (en) | 1986-12-25 | 1986-12-25 | Objective lens driver |
Country Status (1)
| Country | Link |
|---|---|
| JP (2) | JPS63164030A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05217190A (en) * | 1991-11-04 | 1993-08-27 | Internatl Business Mach Corp <Ibm> | Optical disk drive |
-
1986
- 1986-12-25 JP JP61314954A patent/JPS63164030A/en active Pending
- 1986-12-25 JP JP61314953A patent/JPS63164029A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05217190A (en) * | 1991-11-04 | 1993-08-27 | Internatl Business Mach Corp <Ibm> | Optical disk drive |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63164029A (en) | 1988-07-07 |
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