JPS60121540A - Objective lens driver - Google Patents
Objective lens driverInfo
- Publication number
- JPS60121540A JPS60121540A JP22822483A JP22822483A JPS60121540A JP S60121540 A JPS60121540 A JP S60121540A JP 22822483 A JP22822483 A JP 22822483A JP 22822483 A JP22822483 A JP 22822483A JP S60121540 A JPS60121540 A JP S60121540A
- Authority
- JP
- Japan
- Prior art keywords
- spring
- objective lens
- tracking
- plate springs
- focusing
- 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
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
- G11B7/09—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
- G11B7/0925—Electromechanical actuators for lens positioning
- G11B7/0932—Details of sprung supports
Landscapes
- Optical Recording Or Reproduction (AREA)
Abstract
Description
【発明の詳細な説明】
（発明の技術分野）
本発明は、記録媒体上に螺旋あるいは、同心円状に記録
された情報トラックに光スポットを投影し、その反射光
から投影部分の情報を読み取る装置に用いる対物レンズ
の駆動装置に関する。Detailed Description of the Invention (Technical Field of the Invention) The present invention relates to a device that projects a light spot onto an information track recorded spirally or concentrically on a recording medium, and reads information on the projected portion from the reflected light. The present invention relates to an objective lens driving device used for.
（発明の背景）
上述の如き情報の読み取シ装置は、情報トラック上に光
ビームを集光して光スポットを作成すると共に、との光
スポットの情報トラックからの反射光を受光するための
対物レンズを有している。(Background of the Invention) The information reading device as described above focuses a light beam onto an information track to create a light spot, and an objective for receiving reflected light from the information track of the light spot. It has a lens.
この対物レンズは、記録媒体上の情報トラックに光スポ
ットを正確に追従させるために、光軸方向、すなわちフ
ォーカシング方向と、光軸と情報トラックとに直角を成
す方向、すなわちトラッキング方向とに移動される。そ
のために、対物レンズと一体の部材を、装置本体に対し
てフォーカシング方向とトラッキング方向とに移動可能
に保持する保持部材を設けると共に、対物レンズと一体
の部材をフォーカシング方向とトラッキング方向とに電
磁力等によって駆動する駆動装置が設けられている。This objective lens is moved in the direction of the optical axis, that is, the focusing direction, and in the direction that is perpendicular to the optical axis and the information track, that is, the tracking direction, in order to cause the light spot to accurately follow the information track on the recording medium. Ru. To this end, a holding member is provided that holds the member integrated with the objective lens movably in the focusing direction and the tracking direction with respect to the main body of the apparatus, and an electromagnetic force is applied to the member integrated with the objective lens in the focusing direction and the tracking direction. A drive device is provided which is driven by, etc.
さて、このような装置において、保持部材には通常、板
ばねが設けられている。すなわち、対物レンズと一体の
部材を光軸にほぼ平行に設けた平行ばねによって中間部
材に保持すると共に、対物レンズが光軸方向に移動する
ように、中間部材を板ばねによって装置本体に保持せし
めている。Now, in such a device, the holding member is usually provided with a leaf spring. That is, a member integral with the objective lens is held to the intermediate member by a parallel spring provided approximately parallel to the optical axis, and the intermediate member is held to the main body of the apparatus by a leaf spring so that the objective lens moves in the direction of the optical axis. ing.
ところで、このような板ばねは共振モードを有して才？
す、振動周波数に対する変形が連続的でなくなる周波数
の存在するととが知られている１、すなわち、第１図の
如く、対物レンズ１に一体の部材２を中間部材３に保持
する平行ばね４．５を各々考えてみると、第２図（ａ）
の如き一次の共振モード及び、第２図（ｂ）の如き二次
の共振０−ドが存在する。なお、三次以上の共振モード
も理論上は存在するが、実用上大きな影響を及ｅ工さな
いので無視できる。ここで、第２図（ａ）で示しだ一次
の共振モードはできるだけ低周液、第２図（ｂ）で示し
た二次の共振モードはできるだけ高周波（１６Ｋ）（ｚ
以上）であり、また、各共振ピークはできるたけ小さい
方が位置制御を精度良く行なえるので好ましい。ところ
で、このような共振を減するために、第３図に示した如
く、板ばね４、（５）にゴム等のダンピング材３０を付
着した構造をとっている場合が多い。しかしながら、ダ
ンピング材を付着するとダンピング材の質量が付加質蓋
として働き、二次の共振モードの共振周波数が著しく低
下するという欠点があった。また、二次の共振モードの
共振周波数が高くなるようなばね材を用いると、−次の
共振モードの共振周波数が高くなってしまうという欠点
があった。By the way, does such a leaf spring have a resonance mode?
It is known that there is a frequency at which the deformation with respect to the vibration frequency is not continuous. That is, as shown in FIG. 1, a parallel spring 4. Considering each of 5, Figure 2 (a)
There are a first-order resonance mode as shown in FIG. 2(b) and a second-order resonance mode as shown in FIG. 2(b). It should be noted that although third-order or higher-order resonance modes also exist in theory, they can be ignored because they do not have a significant effect in practice. Here, the first-order resonance mode shown in Figure 2 (a) is as low frequency as possible, and the second-order resonance mode shown in Figure 2 (b) is as high frequency as possible (16K) (z
(above), and each resonance peak is preferably as small as possible because position control can be performed with high precision. Incidentally, in order to reduce such resonance, as shown in FIG. 3, a structure is often adopted in which a damping material 30 such as rubber is attached to the leaf springs 4, (5). However, when the damping material is attached, the mass of the damping material acts as an additional layer, and the resonance frequency of the second-order resonance mode is significantly lowered. Furthermore, if a spring material that increases the resonance frequency of the second-order resonance mode is used, there is a drawback that the resonance frequency of the -order resonance mode becomes high.
（発明の目的）
本発明は、これらの欠点を解決し、ばねの共振に対する
ダンピング効果を大にすると共に、二次の共振モードの
周波数を充分高くするように成した保持部材を有する対
物レンズの駆動装置を得ることを目的とする。(Object of the Invention) The present invention solves these drawbacks and provides an objective lens having a holding member configured to increase the damping effect on the resonance of the spring and to sufficiently increase the frequency of the secondary resonance mode. The purpose is to obtain a driving device.
（発明の概要）
すなわち本発明では、第４図に示した如く、ばね系数が
中央部分において大きくなるようにその形状を定めると
共に、両端部分のばね系数が小さい部分にダンピング材
を付着したばね部材にて形成した平行板ばねを用いるこ
とによりて、ばねの共振に対するダンピング効果を大に
すると共に、二次の共振モードの周波数を充分高くする
ように成した対物レンズの駆動装置を得るものである。(Summary of the Invention) That is, in the present invention, as shown in FIG. 4, the shape of the spring member is determined so that the spring coefficient is large in the central part, and a damping material is attached to the parts at both ends where the spring coefficient is small. By using parallel leaf springs formed by the above method, an objective lens driving device is obtained which is capable of increasing the damping effect on the resonance of the spring and making the frequency of the secondary resonance mode sufficiently high. .
第４図では、ばね系数を大きくするために、中央部分に
折り返し部を設けたが、中央部分の厚みを周辺部分よシ
大きくしてばね系数に差を生じさせることもできる。ま
た、平行板ばねといっても、ばね部材は正確に平行にな
９ている必要はなく、要はトラッキング方向、フォーカ
シング方向へ対物レンズを移動制御可能に保持できれば
良い。さらに、平行板ばねとしては第４図に示した如き
平面形状が長四辺形の板はねの外に、リング状その他の
形状の板ばねを用いた場合であっても同様である。要は
板ばねであシさえすれば、その形状はいずれでも良い。In FIG. 4, a folded portion is provided in the central portion in order to increase the number of springs, but the thickness of the central portion may be made larger than that of the peripheral portions to create a difference in the number of springs. Furthermore, although the spring members are referred to as parallel leaf springs, they do not need to be exactly parallel to each other, as long as they can hold the objective lens in a controllable manner in the tracking direction and the focusing direction. Further, in addition to the parallel plate spring having a rectangular planar shape as shown in FIG. 4, the same applies even if a plate spring having a ring shape or other shape is used. In short, any shape is fine as long as it is supported by a leaf spring.
（実施例） 第５図は本発明の一実施例の縦断面図である。(Example) FIG. 5 is a longitudinal sectional view of an embodiment of the present invention.
装置本体６には、半導体レーザー等の光源７．２Ｊリメ
ータレンズ８、偏光ビームスプリッタ−９、」−波長板
１０が固定されている。装置本体６に対してトラツキジ
グ方向及びフォーカシング方向に移動するように、トラ
ッキング用平行板ばね４．５フオ一カシ↓グ用平行板ば
ね１１，１２によりて装置本体６に保持された保持部材
２には、対物レンズ１、集光レンズ１３、円柱レンズ１
４．４分割受光索子１５が保持されている。各々の板ば
ね４．５（１１，１２も同様）は第４図の如き中央部分
に折シ曲げ部４０．４１を形成して剛性を高め、ばね系
数を大きくしであると共に、両端部分のばね系数の小さ
い部分にはダンピング材３１．３２が付着されている。A light source 7, such as a semiconductor laser, a remeter lens 8, a polarizing beam splitter 9, and a wavelength plate 10 are fixed to the main body 6 of the apparatus. The holding member 2 held on the apparatus body 6 by the parallel plate springs 4 and 5 for tracking and the parallel plate springs 11 and 12 for tracking is moved in the tracking jig direction and the focusing direction with respect to the apparatus body 6. is objective lens 1, condensing lens 13, cylindrical lens 1
A 4.4-division light-receiving cable 15 is held. Each leaf spring 4.5 (same as 11 and 12) has a bent part 40.41 in the center as shown in Fig. 4 to increase the rigidity and increase the number of springs. Damping materials 31 and 32 are attached to the portions where the spring number is small.
保持部材２はトラッキング用平行板ばね４．５によって
トラッキング方向にのみ移動可能に中間部材３に支持さ
れている。The holding member 2 is supported by the intermediate member 3 so as to be movable only in the tracking direction by a tracking parallel leaf spring 4.5.
中間部材３はフォーカシング用平行板ばね１１゜１２（
各々は平面形状がリング状、もしくはうず巻状）によっ
てフォーカシング方向にのみ移動可能に装置本体６に支
持されている。従って、中間部材３がフォーカシング方
向に移動するときは、保持部材２も一体になって移動す
るっ
トラッキング用の平行板ばね４．５とフォーカシング用
の平行板ばね１１．１２とは第４図にて説明したように
、ばね係数を中心部分にて大となすようにその形状が定
められると共に、ばね係数の小なる両端部分にはダンピ
ング材３１．３２が付着されている。The intermediate member 3 includes parallel leaf springs 11°12(
Each of them has a ring-shaped or spiral-shaped planar shape and is supported by the main body 6 of the apparatus so as to be movable only in the focusing direction. Therefore, when the intermediate member 3 moves in the focusing direction, the holding member 2 also moves together.The parallel leaf springs 4.5 for tracking and the parallel leaf springs 11.12 for focusing are shown in FIG. As explained above, the shape is determined so that the spring coefficient is large in the center part, and damping materials 31 and 32 are attached to both end parts where the spring coefficient is small.
保持部材２と装置本体６との間及び、中間部材３と装置
本体６との間には、保持部材２と中間部材３とを各々可
動な方向に電磁力によって駆動する駆動装置が設けられ
ている。すなわち、保持部材２にはトラッキング用コイ
ル１６が巻装されており、図面の上下方向に走るコイル
１６の部分には、図面の上下方向からコイル１６を挾む
ように一対のトラッキング用１−り１７が装置本体６に
配ｆｆｉすれ、コイル１６を横切って図面の上下方向に
磁束を生じさせるように、トラッキング用磁石１８がヨ
ーク１７に挾持されている。また、中間部材４にはフォ
ーカシング用コイル１９が光学系の光軸を中心としてリ
ング状に巻装されており、このコイル１９を挾むように
一対のフォーカシング用ヨーク２０が装置本体６に配設
されている。A driving device is provided between the holding member 2 and the device main body 6 and between the intermediate member 3 and the device main body 6, and drives the holding member 2 and the intermediate member 3 in respective movable directions by electromagnetic force. There is. That is, a tracking coil 16 is wound around the holding member 2, and a pair of tracking wires 17 are arranged in the portion of the coil 16 that runs in the vertical direction of the drawing so as to sandwich the coil 16 from the vertical direction of the drawing. A tracking magnet 18 is disposed on the device body 6 and is held between the yoke 17 so as to cross the coil 16 and generate a magnetic flux in the vertical direction of the drawing. Further, a focusing coil 19 is wound around the intermediate member 4 in a ring shape around the optical axis of the optical system, and a pair of focusing yokes 20 are disposed on the main body 6 of the apparatus so as to sandwich this coil 19. There is.
一対のヨーク２０にはフォーカシング用磁石２１が挟持
されている。A focusing magnet 21 is held between the pair of yokes 20 .
このような構造であるから、光源７から射出された光は
コリメータレンズ８にて平行光束化されて、偏光ビーム
スプリッタ−９に入射する。偏光ビームスプリッタ−９
にて反射した光束は、１ｉ波長板１０を通って対物レン
ズｌに入射する。対物レンズ１を射出した光束は光ディ
ス２０表面で反射され、対物レンズ１、−」−波長板１
０、偏光ビームスプリッタ−９、集光レンズ１３、円柱
レンズ１４、を透過して４分割受光素子１５に入射する
。With such a structure, the light emitted from the light source 7 is collimated by the collimator lens 8 and then enters the polarizing beam splitter 9. Polarizing beam splitter-9
The light beam reflected at the 1i wavelength plate 10 enters the objective lens l. The light beam emitted from the objective lens 1 is reflected by the surface of the optical disk 20, and
0, the light passes through the polarizing beam splitter 9, the condensing lens 13, and the cylindrical lens 14, and enters the 4-split light receiving element 15.
４分割受光素子１５の出力信号は周知のトラッキングサ
ーボ装置とフォーカシングサーボ装置とに入力される。The output signal of the four-division light-receiving element 15 is input to a well-known tracking servo device and focusing servo device.
トラッキングサーボ装置は４つの受光素子のうち、トラ
ッキング方向に直交する方向に隣接する受光素子の出力
信号を加算した信号を用いることによシ、実質的に２分
割素子と同様の使い方をしており、それによって周知の
如きトラッキングエラー信号をトラッキング用コイル１
６に流す。ドラッギング用コイル１６が図面の上下方向
に走っている部分に、トラッキング用ヨーク１７、磁石
１Ｂによって紙面垂直な方向に磁束が生じているから、
トラッキングエラー信号によって保持部材２は図面の左
右方向に力を受ける。保持部材２は、中間部材３にトラ
ッキング用平行板はね４．５によって結合されているの
みであるから、中間部材３に対して図面の左右方向、す
なわちトラッキング方向へ移動する。The tracking servo device uses a signal obtained by adding the output signals of adjacent light receiving elements in the direction orthogonal to the tracking direction among the four light receiving elements, and is used in substantially the same way as a two-split element. , thereby transmitting a well-known tracking error signal to the tracking coil 1.
6. Because the tracking yoke 17 and the magnet 1B generate magnetic flux in the direction perpendicular to the plane of the paper in the part where the dragging coil 16 runs in the vertical direction of the drawing,
The holding member 2 receives a force in the left-right direction in the drawing due to the tracking error signal. Since the holding member 2 is only connected to the intermediate member 3 by the tracking parallel plate springs 4.5, it moves relative to the intermediate member 3 in the left-right direction in the drawing, that is, in the tracking direction.
この際、平行板ばね４．５の共振を充分抑えることがで
きるので、良好な周波数特性が確保され、対物レンズを
正確に駆動制御することができる。At this time, since the resonance of the parallel plate spring 4.5 can be sufficiently suppressed, good frequency characteristics can be ensured, and the objective lens can be accurately driven and controlled.
フォーカシングに際しては、図の光学系は非点収差法に
よる焦点検出を行なうように構成された周知のものであ
って、周知の如きフォーカシングエラー信号がフォーカ
シング用コイル１９に流入すると、中間部材３は紙面の
上下方向に力を受ける。従って、中間部材３と共に保持
部材２がフォーカシング方向に駆動される。During focusing, the optical system shown in the figure is a well-known one configured to perform focus detection by the astigmatism method, and when a well-known focusing error signal flows into the focusing coil 19, the intermediate member 3 moves receives force in the vertical direction. Therefore, the holding member 2 together with the intermediate member 3 is driven in the focusing direction.
この場合にも、平行板ばね４．５．１１．１２の共振を
充分抑えることができるので、良好な周波数特性が確保
され、対物レンズを正確に駆動制御することができる。In this case as well, the resonance of the parallel plate springs 4.5.11.12 can be sufficiently suppressed, so good frequency characteristics can be ensured and the objective lens can be accurately driven and controlled.
このようにしてトラッキングとフォーカシングを正確に
行なうことができる。In this way, tracking and focusing can be performed accurately.
Ｖなわち、本実施例のように、１次モードで振幅の大き
い板ばねの両端の剛性を小さくし、かつ、２次モードで
振幅の大きい板ばねの中央部の剛性を大きくしであるの
で、１次の共振周波数を低く、かつ、２次の共振周波数
を高くすることができる。V. In other words, as in this embodiment, the rigidity at both ends of the leaf spring, which has a large amplitude in the primary mode, is reduced, and the rigidity at the center of the leaf spring, which has a large amplitude in the secondary mode, is increased. , it is possible to lower the primary resonance frequency and increase the secondary resonance frequency.
さらに、１次および２次の共振モードで振幅が大きい板
ばねの両端部のみにダンピング材を付着しであるので、
１次および２次の共振に対しダンピングが有効に効くば
かシでなく、第３図のものに比し十分軽くできるので２
次の共振周波数を低下させることがない。Furthermore, since the damping material is attached only to both ends of the leaf spring where the amplitude is large in the primary and secondary resonance modes,
The damping is not effective against primary and secondary resonance, and it is sufficiently lighter than the one in Figure 3, so it is 2.
The next resonant frequency will not be lowered.
なお、以上の実施例では、トラッキング方向及びフォー
カシング方向いずれにも平行板ばねを用いて保持したが
、いずれか一方は板ばねを用いない他の保持手段を用い
ても良い。また、トラッキング方向は必ずしも平行板ば
ねである必用はなく一つのばね部材を用いることもでき
る。In the above embodiments, parallel plate springs are used for holding in both the tracking direction and the focusing direction, but other holding means that do not use plate springs may be used in either one. Further, the tracking direction does not necessarily have to be a parallel plate spring, and a single spring member can also be used.
（発明 考案の効果）
以上のように本発明によれば、−次の共振周波数が低く
、かつ２次の共振周波数が高いばかシでなく、各共振に
おいてもダンピングの高い対物レンズ駆動装置を作るこ
とができる。更に本発明によれば、バネ全体としての剛
性を高くとれるので、加工・組立時に取シ扱が簡単であ
シ量産に適している。(Effects of the Invention and Ideas) As described above, according to the present invention, an objective lens driving device is created that does not have a low -order resonance frequency and a high secondary resonance frequency, but also has high damping in each resonance. be able to. Further, according to the present invention, since the spring as a whole has high rigidity, it is easy to handle during processing and assembly, and is suitable for mass production.
第１図は対物レンズを平行ばねにて駆動する装置の簡略
化した斜視図、第２図（ａ）、（ｂ）は第１図の如き板
はねの共振モードの様子を示す図であって、第２図（ａ
）は−次の共振モード、第２図（ｂ）は二次の共振モー
ドを各々示し、第３図をよ第２図（ａ）、（ｂ）の如き
共振を抑えるために、板ばねにダンピング材を付着した
従来技術の斜視図、第４図は本発明の一実施例に用いら
れる仮ばねの斜視図、第５図は本発明の一実施例である
対物レンズ駆動装置の縦断面図、である。
（主要部分の符号の説明）
１・・・対物レンズ、２・・・保持部材、３・・・中間
部材、４．５・・・トラッキング用平行板ばね、【１．
１１′、１２．１２′・・・フォーカシング用平行板ば
ね、１６・・・トラッキンク用コーｆル、
１７・・・一対のトラッキング用ヨーク、１８・・・ト
ラッキング用磁石、
１９・・・７オーカシング用コイル、
２０・・・一対の７オーカシング用ヨーク、２１・・・
７オ一カシング用磁石、
３１・、３２・・・ダンピング材。
出願人 日本光学人業株式会社
代理人 渡 辺 隆 男Fig. 1 is a simplified perspective view of a device that drives an objective lens with a parallel spring, and Figs. 2 (a) and (b) are diagrams showing the resonance mode of the plate spring as shown in Fig. 1. Figure 2 (a
) shows the −-order resonance mode, and FIG. 2(b) shows the second-order resonance mode. Referring to FIG. 3, in order to suppress the resonance as shown in FIGS. FIG. 4 is a perspective view of a temporary spring used in an embodiment of the present invention, and FIG. 5 is a longitudinal cross-sectional view of an objective lens driving device that is an embodiment of the present invention. , is. (Explanation of symbols of main parts) 1... Objective lens, 2... Holding member, 3... Intermediate member, 4.5... Parallel leaf spring for tracking, [1.
11', 12.12'...Parallel leaf spring for focusing, 16...Coulle for tracking, 17...Pair of yokes for tracking, 18...Magnet for tracking, 19...7 Orcusing Coil for use, 20... A pair of 7-orcasing yokes, 21...
7 Orcasing magnet, 31, 32...damping material. Applicant: Takashi Watanabe, Agent of Nippon Kogaku Jingyo Co., Ltd.
Claims (1)
方向に移動可能に第１保持手段によって保持せしめ、前
記保持部材を装置本体に対してフォーカシング方向に移
動可能に第２保持手段によって保持せしめ、前記保持部
材と前記装置本体との間に前記対物レンズをトラッキン
グ方向へ駆動する第１駆動装置を設けると共に、前記中
間部材と前記装置本体との間に前記対物レンズをフォー
７ノシング方向へ駆動する第２駆動装置を設けた対物レ
ンズ駆動装置において、前記第１保持手段と前記第２保
持手段との少なくとも一方を板ばねにて構成し、該板ば
ねとしてばね系数が中央部分において大きくなるように
その形状を定めると共に、ばね系数の小さい部分にダン
ピング材を付着したばね部材を用いたことを特徴とする
対物レンズ駆動装置。A holding member of the objective lens is held by a first holding means so as to be movable in a tracking direction with respect to an intermediate member, the holding member is held by a second holding means so as to be movable in a focusing direction with respect to an apparatus main body, and the holding member is held by a second holding means so as to be movable in a focusing direction with respect to an apparatus main body. A first driving device for driving the objective lens in the tracking direction is provided between the member and the device main body, and a second driving device for driving the objective lens in the four-nothing direction is provided between the intermediate member and the device main body. In the objective lens driving device provided with a driving device, at least one of the first holding means and the second holding means is constituted by a leaf spring, and the leaf spring has a shape such that the spring coefficient becomes larger in the central portion. What is claimed is: 1. An objective lens driving device characterized by using a spring member having a damping material attached to a portion having a small spring coefficient.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22822483A JPS60121540A (en) | 1983-12-02 | 1983-12-02 | Objective lens driver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22822483A JPS60121540A (en) | 1983-12-02 | 1983-12-02 | Objective lens driver |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS60121540A true JPS60121540A (en) | 1985-06-29 |
Family
ID=16873115
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22822483A Pending JPS60121540A (en) | 1983-12-02 | 1983-12-02 | Objective lens driver |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60121540A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62129119U (en) * | 1986-02-05 | 1987-08-15 | ||
| JPS63191325A (en) * | 1987-02-04 | 1988-08-08 | Matsushita Electric Ind Co Ltd | Objective lens supporting device |
| JPS63239624A (en) * | 1987-03-27 | 1988-10-05 | Canon Electronics Inc | Optical system driving device |
-
1983
- 1983-12-02 JP JP22822483A patent/JPS60121540A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62129119U (en) * | 1986-02-05 | 1987-08-15 | ||
| JPS63191325A (en) * | 1987-02-04 | 1988-08-08 | Matsushita Electric Ind Co Ltd | Objective lens supporting device |
| JPS63239624A (en) * | 1987-03-27 | 1988-10-05 | Canon Electronics Inc | Optical system driving device |
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