JPH0447900B2 - - Google Patents
Info
- Publication number
- JPH0447900B2 JPH0447900B2 JP60185021A JP18502185A JPH0447900B2 JP H0447900 B2 JPH0447900 B2 JP H0447900B2 JP 60185021 A JP60185021 A JP 60185021A JP 18502185 A JP18502185 A JP 18502185A JP H0447900 B2 JPH0447900 B2 JP H0447900B2
- Authority
- JP
- Japan
- Prior art keywords
- coil
- lens
- medium surface
- axis direction
- force
- 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.)
- Expired - Lifetime
Links
- 239000004020 conductor Substances 0.000 claims description 25
- 230000004907 flux Effects 0.000 claims description 10
- 230000003287 optical effect Effects 0.000 description 14
- 238000010586 diagram Methods 0.000 description 3
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
- Mechanical Optical Scanning Systems (AREA)
- Optical Recording Or Reproduction (AREA)
Description
【発明の詳細な説明】
本発明は光学的に情報を記録したデイスク、主
としてビデオデイスクプレーヤーのピツクアツプ
の改良に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in the pickup of an optically recorded disc, primarily a video disc player.
光学的に情報を記録したデイスク、主に光学式
ビデオデイスクのプレーヤーのピツクアツプの働
きとしては読み取りビームをデイスク面に集束さ
せるフオーカシングと、読み取りビームを情報ト
ラツクに追従させるトラツキングとがある。従来
フオーカシングは対物レンズを光軸方向に動か
し、トラツキングはガルバノミラーを動かして対
物レンズに入射する読取り用のビームを傾けてそ
れぞれ行なつていた。 The pick-up functions of a player for optically recorded information, mainly optical video disks, include focusing, which focuses the read beam on the disk surface, and tracking, which causes the read beam to follow the information track. Conventionally, focusing was performed by moving the objective lens in the optical axis direction, and tracking was performed by moving a galvanometer mirror to tilt the reading beam incident on the objective lens.
しかし、トラツキングを行なうためにガルバノ
ミラーを相当の高速度で動かすためには大きな力
が必要となり、また装置の機構は大がかりなもの
となり、消費する電力も大きくならざるを得なか
つた、一方レンズをフオーカシング用コイルとト
ラツキング用コイルを用いて２次元方向に駆動す
るものとして特開昭52−55424号公報に開示され
たものがある。当該公報第７図には２種類のコイ
ルをレンズ保持体に一体的に固定しコイルとレン
ズが一体となつて移動し得る構成が説明されてい
る。しかしトラツキング用マグネツトに対向する
トラツキング用コイルの導線配列面とフオーカシ
ング用マグネツトに対向するフオーカシング用コ
イルの導線配列面が互いに垂直な関係で配置され
ると共に、それぞれのコイルへ差し向ける磁束の
方向が互いに直角となつているためレンズ保持体
とコイルとマグネツトとをコンパクトにまとめる
ことができず、結果としてピツクアツプ装置の小
型化が困難となる欠点がある。 However, in order to perform tracking, a large amount of force is required to move the galvano mirror at a fairly high speed, and the mechanism of the device is also large-scale, requiring a large amount of power consumption. Japanese Unexamined Patent Application Publication No. 52-55424 discloses an apparatus for driving in two-dimensional directions using a focusing coil and a tracking coil. FIG. 7 of the publication describes a configuration in which two types of coils are integrally fixed to a lens holder and the coils and lens can move together. However, the conductor array surface of the tracking coil facing the tracking magnet and the conductor wire array surface of the focusing coil facing the focusing magnet are arranged perpendicularly to each other, and the directions of the magnetic flux directed to each coil are mutually perpendicular to each other. Because they are at right angles, the lens holder, coil, and magnet cannot be assembled compactly, and as a result, there is a drawback that it is difficult to miniaturize the pickup device.
同様な技術を開示したものとして特開昭51−
68121号公報第６図のものがあるが、これもフオ
ーカシング用マグネツトとトラツキング用マグネ
ツトから発する磁束の方向が互いに垂直な平面上
での方向となるため、前記の先行技術と同様ピツ
クアツプ装置の小型化が困難となる欠点がある。
更に特開昭51−114102号公報第７図にはフオーカ
シング用コイルとトラツキング用コイルの両方の
コイルに媒体面に垂直な導線配列面を形成させ、
この両方の導線配列面へ向けて媒体面に平行な磁
束を差し向ける構成が説明されている。しかしか
かるトラツキング用コイル（図番５３で示され
る）には媒体面に平行な導線配列面（第７図Ｂの
下側水平部分のコイル面）にも媒体面に垂直な磁
束が交差している。ここで媒体面に垂直な導線配
列面と媒体面に平行な導線配列面の２つの導線配
列面で発生する２つの力はこれら導線配列面と交
差する磁束の方向より互いに相殺される力とな
り、結果としてトラツキング用コイルはどのよう
に駆動するのか不明なものになつている。 Japanese Unexamined Patent Application Publication No. 1973-1989 as disclosing a similar technology.
There is the one shown in Figure 6 of Publication No. 68121, but since the directions of the magnetic flux emitted from the focusing magnet and the tracking magnet are on a plane perpendicular to each other, the pickup device can be miniaturized similarly to the prior art described above. There is a drawback that it is difficult to
Further, in Fig. 7 of Japanese Patent Application Laid-open No. 51-114102, both the focusing coil and the tracking coil are formed with conductor array surfaces perpendicular to the medium surface.
A configuration is described in which magnetic flux parallel to the medium surface is directed toward both conductive wire arrangement surfaces. However, in such a tracking coil (indicated by figure number 53), the magnetic flux perpendicular to the medium surface also intersects the conductor array surface parallel to the medium surface (the coil surface in the lower horizontal portion of FIG. 7B). . Here, the two forces generated on the two conductor array surfaces, the conductor array surface perpendicular to the medium surface and the conductor array surface parallel to the medium surface, become forces that cancel each other out in the direction of the magnetic flux that intersects with these conductor array surfaces. As a result, it is unclear how the tracking coil is driven.
またこの場合の２種類のコイルは板バネ（図番
５１ａ，５１ｂ，５１ｃ，５１ｄで示される）の
介在によりレンズと一体的に駆動できない構造と
なつており、このためピツクアツプ装置の構成が
大型になる欠点がある。 Furthermore, the two types of coils in this case cannot be driven integrally with the lens due to the interposition of leaf springs (indicated by numbers 51a, 51b, 51c, and 51d), which makes the configuration of the pickup device large. There is a drawback.
本発明は簡単な構成で且つ小型軽量のピツクア
ツプを提供することを目的とする。 SUMMARY OF THE INVENTION An object of the present invention is to provide a compact and lightweight pickup with a simple configuration.
本発明のピツクアツプ装置は情報がトラツク状
に記録された記録媒体の情報を読み取るために、
レンズを前記記録媒体の媒体面に垂直な第１の方
向に駆動するための第１のコイルと前記レンズを
前記媒体面に平行で情報トラツクを横切る第２の
方向に駆動するための第２のコイルとが前記レン
ズを保持するためのレンズ保持体と一体となつて
移動するように、前記第１と第２の両コイルを前
記レンズ保持体に実質的に固定すると共に、ベー
スと前記レンズ保持体とを弾性部材で連結し、前
記レンズを前記第１と第２の両方向に駆動するよ
うにしたピツクアツプ装置において、
前記第１のコイルと前記第２のコイルの両方の
コイルに前記媒体面に垂直な導線配列面（複数の
導線が近接状態で配置されることにより生じる外
見上の面）を形成させると共に前記ベースに磁界
発生手段を固定して該磁界発生手段から発した前
記媒体面に平行な磁束を前記第１のコイルと前記
第２のコイルのそれぞれの前記導線配列面へ差し
向けるように構成し前記コイルへの通電と前記磁
束との交差とにより前記第１のコイルに生じる前
記媒体面に垂直な力と、前記第２のコイルに生じ
る前記媒体面に平行な力を利用して前記レンズを
前記第１の方向と前記第２の方向に駆動するよう
にしたことを特徴とするものである。 The pick-up device of the present invention reads information from a recording medium on which information is recorded in the form of a track.
a first coil for driving the lens in a first direction perpendicular to the medium surface of the recording medium; and a second coil for driving the lens in a second direction parallel to the medium surface and across the information track. Both the first and second coils are substantially fixed to the lens holder so that the coils move together with the lens holder for holding the lens, and the base and the lens holder are In the pickup device, the lens is connected to the body by an elastic member and driven in both the first and second directions, wherein both the first coil and the second coil are connected to the medium surface. A vertical conductor array surface (an apparent surface created by arranging a plurality of conductors in close proximity) is formed, and a magnetic field generating means is fixed to the base, and the magnetic field generating means is parallel to the medium surface emitted from the magnetic field generating means. The medium is configured to direct a magnetic flux to the conducting wire arrangement surface of each of the first coil and the second coil, and is generated in the first coil by energization of the coil and intersection with the magnetic flux. The lens is driven in the first direction and the second direction by using a force perpendicular to the surface and a force parallel to the medium surface generated in the second coil. It is something.
以下図面に基づき本発明の一実施例を詳細に説
明する。 An embodiment of the present invention will be described in detail below based on the drawings.
第１図はレンズ駆動機構の光軸に沿つた断面図
である。レンズ１２は円筒形にフランジのついた
形状のレンズ枠１３に取り付けられ、レンズ枠１
３はばね１４及びダンパー１５を介してマグネツ
トから成る磁界発生手段１６に取り付けられてい
る。ばね１４はレンズ１２の光軸方向に曲がり、
レンズ１２の半径方向にも伸縮性を有するもので
あり、従つてレンズ枠１３は光軸方向並びに半径
方向に動くことができる。 FIG. 1 is a cross-sectional view of the lens drive mechanism along the optical axis. The lens 12 is attached to a cylindrical lens frame 13 with a flange.
3 is attached via a spring 14 and a damper 15 to a magnetic field generating means 16 consisting of a magnet. The spring 14 bends in the direction of the optical axis of the lens 12,
The lens 12 is also stretchable in the radial direction, and therefore the lens frame 13 can move in the optical axis direction as well as in the radial direction.
さらにレンズ枠１３にはコイルボビン１７が取
り付けられていて、これに第２図に示す構造のコ
イルが形成されている。第２図ａはコイルの斜視
図、第２図ｂはコイルを光軸方向から見た図であ
る。図示するようにボビン１７の表面にはプリン
トコイルとすることができる４つのコイル１８〜
２１が設けられており、更にこれらのコイル１８
〜２１の上には光軸方向駆動用のコイル２２が巻
かれている。 Furthermore, a coil bobbin 17 is attached to the lens frame 13, and a coil having the structure shown in FIG. 2 is formed on this. FIG. 2a is a perspective view of the coil, and FIG. 2b is a view of the coil viewed from the optical axis direction. As shown in the figure, the surface of the bobbin 17 has four coils 18 to 18, which can be printed coils.
21 are provided, and these coils 18
A coil 22 for driving in the optical axis direction is wound on top of the coils 21 to 21.
磁界発生手段１６によつてギヤツプ２３には第３
図（レンズ駆動機構の光軸に垂直な断面図を示
す）の様に外側から内側へ向う磁界が形成されて
いるので、コイル１８〜２１に適当な方向の電流
を流せばレンズ１２が固定されているボビン１７
はレンズ光軸と直角な方向に動き、またコイル２
２に電流を流すとコイルボビン１７は光軸方向に
動く。The gap 23 is provided with a third
As shown in the figure (which shows a cross-sectional view perpendicular to the optical axis of the lens drive mechanism), a magnetic field is formed that goes from the outside to the inside, so if a current is passed in an appropriate direction through the coils 18 to 21, the lens 12 is fixed. bobbin 17
moves in a direction perpendicular to the lens optical axis, and coil 2
2, the coil bobbin 17 moves in the optical axis direction.
以下コイル１８〜２１への通電についての一例
を以下に説明する。 An example of energizing the coils 18 to 21 will be described below.
コイル１８のコイル導線１８−１に関し紙面の
上から下へ向つて（印で示す）通電する。従つ
てコイル導線１８−２には紙面の下から上に向か
つて（〓印で示す）通電される。このとき、コイ
ル１８のコイル導線１８−１にはフレミングの左
手の法則に従いレンズ光軸と直行する方向、即ち
ほぼＸ軸方向に力Ａが作用する。一方コイル導線
１８−２には同様にほぼＹ軸方向の力Ｂが作用す
る。 The coil conducting wire 18-1 of the coil 18 is energized from the top to the bottom of the paper (indicated by marks). Therefore, the coil conducting wire 18-2 is energized from the bottom to the top of the paper (indicated by the cross mark). At this time, a force A acts on the coil conducting wire 18-1 of the coil 18 in a direction perpendicular to the lens optical axis, that is, approximately in the X-axis direction, according to Fleming's left-hand rule. On the other hand, a force B approximately in the Y-axis direction similarly acts on the coil conducting wire 18-2.
一方、コイル１８と対向するコイル２０のコイ
ル導線２０−１に、紙面の下から上に向つて通電
する。従つてコイル導線２０−２には紙面の上か
ら下に向かつて通電されることになる。このと
き、コイル導線２０−１にはＸ軸方向の力Ｅ、コ
イル導線２０−２にはＹ軸方向の力Ｆが作用す
る。 On the other hand, the coil conducting wire 20-1 of the coil 20 facing the coil 18 is energized from the bottom to the top of the paper. Therefore, the coil conducting wire 20-2 is energized from the top to the bottom of the drawing. At this time, a force E in the X-axis direction acts on the coil conductor 20-1, and a force F in the Y-axis direction acts on the coil conductor 20-2.
以上の様に対向して配置されたコイル１８と２
０に上記の様な通電を行うと、各コイル導線１８
−１，１８−２，２０−１，２０−２のそれぞれ
に作用する力Ａ，Ｂ，Ｅ，Ｆは合成されコイルボ
ビンはＸ軸とＹ軸に45度の傾きを持つＺ軸方向に
移動し、結果としてレンズ１２はレンズ光軸と直
角な方向に移動する。このＺ軸方向をトラツク方
向とほぼ直交する方向に設定すればコイル１８及
び２０にトラツキング信号を供給することにより
レンズ１２をトラツキング駆動させることができ
る。 Coils 18 and 2 are arranged facing each other as described above.
When energized as described above, each coil conductor 18
The forces A, B, E, and F acting on -1, 18-2, 20-1, and 20-2 are combined, and the coil bobbin moves in the Z-axis direction with an inclination of 45 degrees to the X-axis and Y-axis. , as a result, the lens 12 moves in a direction perpendicular to the lens optical axis. If the Z-axis direction is set substantially perpendicular to the tracking direction, the lens 12 can be driven for tracking by supplying tracking signals to the coils 18 and 20.
一方、コイル１９について、コイル導線１９−
１に関し紙面の下から上へ向かつて通電する。従
つて、コイル導線１９−２には紙面の上から下に
向つて通電される。このときコイル導線１９−１
にはＹ軸方向の力Ｃが、コイル導線１９−２には
Ｘ軸方向と逆方向の力Ｄがそれぞれ作用する。 On the other hand, regarding the coil 19, the coil conductor 19-
Regarding 1, energize from the bottom of the page to the top. Therefore, the coil conducting wire 19-2 is energized from the top to the bottom of the page. At this time, the coil conductor 19-1
A force C in the Y-axis direction acts on the coil conductor 19-2, and a force D in the opposite direction to the X-axis direction acts on the coil conducting wire 19-2.
同様にコイル２１について、コイル導線２１−
１に関し紙面の上から下に向つて通電する。従つ
て、コイル導線２１−２には紙面の下から上へ向
つて電流が流れることになる。この結果コイル導
線２１−１にはＹ軸方向の力Ｇ、コイル導線２１
−２にはＸ軸方向とは逆方向の力Ｈがそれぞれ作
用する。 Similarly, regarding the coil 21, the coil conductor 21-
Regarding 1, the current is applied from the top to the bottom of the page. Therefore, a current flows through the coil conducting wire 21-2 from the bottom to the top of the page. As a result, a force G in the Y-axis direction is applied to the coil conductor 21-1.
A force H in a direction opposite to the X-axis direction acts on -2.
以上の様にコイル１９及び２１の各コイルに上
記の方向で通電を行うと、コイル導線１９−１及
び２１−１のそれぞれに作用するＹ軸方向の力Ｃ
及びＧと、コイル導線１９−２及び２１−２のそ
れぞれに作用するＸ軸方向と逆方向の力Ｄ及びＨ
の合成力によつてレンズ１２をＺ軸方向と直交す
るＷ軸方向へ移動させることもできる。 As described above, when each of the coils 19 and 21 is energized in the above direction, a force C in the Y-axis direction acts on each of the coil conductors 19-1 and 21-1.
and G, and forces D and H in the opposite direction to the X-axis direction acting on the coil conductors 19-2 and 21-2, respectively.
The combined force can also move the lens 12 in the W-axis direction, which is perpendicular to the Z-axis direction.
更に本実施例においては４つのコイル１８〜２
１に前記の方向でトラツキング用信号を流すこと
によつてレンズを第３図のＹ軸方向に駆動させる
ことができる。この場合コイル導線１９−２と２
０−１のそれぞれに作用する互に逆方向の力Ｄと
Ｅ、並びにコイル導線１８−１と２１−２のそれ
ぞれに作用する逆方向の力ＡとＨはお互いに相殺
され、結果としてレンズ１２の移動には無関係な
力となり、Ｙ軸方向の力Ｂ，Ｃ，Ｆ，Ｇの合成力
によりレンズ１２をＹ軸方向に移動させることが
できる。このＹ軸方向をデイスクの情報トラツク
方向とほぼ直交するようにピツクアツプ装置を設
置すれば、レンズ１２をトラツキング駆動させる
ことができる。上述した説明においてＺ軸方向及
びＷ軸方向又はＹ軸方向に関し、逆方向への移動
は通電方向を一様に逆にすれば可能であることは
明らかである。 Furthermore, in this embodiment, there are four coils 18 to 2.
By passing a tracking signal in the above-mentioned direction to 1, the lens can be driven in the Y-axis direction in FIG. In this case, coil conductors 19-2 and 2
Forces D and E in opposite directions acting on each of the coil conductors 18-1 and 21-2 and forces A and H in opposite directions acting on each of the coil conductors 18-1 and 21-2 cancel each other out, and as a result, the lens 12 The lens 12 can be moved in the Y-axis direction by the combined force of the forces B, C, F, and G in the Y-axis direction. If the pickup device is installed so that the Y-axis direction is substantially perpendicular to the information tracking direction of the disk, the lens 12 can be driven for tracking. In the above description, it is clear that movement in the opposite direction with respect to the Z-axis direction, W-axis direction, or Y-axis direction is possible by uniformly reversing the energization direction.
以上の様に本発明はフオーカシング用コイルと
トラツキング用コイルの両方のコイルに記録媒体
の媒体面に垂直な導線配列面を形成させ、且つ媒
体面に平行な磁束をこれら導線配列面へ差し向け
るように磁界発生手段を配置するようにしたか
ら、レンズ保持体とコイルと磁界発生手段とを容
易にコンパクトにまとめることができ、結果とし
てピツクアツプ装置を著しく小型軽量にすること
ができる。 As described above, the present invention allows both the focusing coil and the tracking coil to form conducting wire array surfaces perpendicular to the medium surface of the recording medium, and directs magnetic flux parallel to the medium surface to these conducting wire array surfaces. Since the magnetic field generating means is disposed in the lens holder, the lens holder, the coil, and the magnetic field generating means can be easily and compactly assembled, and as a result, the pickup device can be made extremely small and lightweight.
なお本発明は上述した実施例に限られるもので
はなく、又ビデオデイスク再生装置に限らず、例
えば音楽情報を記録したデイスク再生装置等にも
使用できることはもちろんである。 It should be noted that the present invention is not limited to the above-described embodiments, and can of course be used not only for video disc playback devices but also for example for disc playback devices on which music information is recorded.
第１図はレンズを各方向に動かす機構の一例を
示す線図、第２図ａおよびｂはレンズを各方向に
動かすコイルの斜視図および光軸方向から見た線
図、第３図はレンズ駆動機構の光軸に垂直な断面
図を示したものである。
１２……レンズ、１３……レンズ枠、１４……
ばね、１５……ダンパー、１６……磁界発生手
段、１７……コイルボビン、１８〜２１……コイ
ル、２２……コイル、２３……ギヤツプ、１８−
１，１８−２，１９−１，１９−２，２０−１，
２０−２，２１−１，２１−２……コイル導線。
Figure 1 is a diagram showing an example of a mechanism for moving the lens in each direction, Figures 2 a and b are perspective views and diagrams of the coil that moves the lens in each direction, and diagrams seen from the optical axis direction, Figure 3 is the lens FIG. 4 shows a cross-sectional view perpendicular to the optical axis of the drive mechanism. 12...lens, 13...lens frame, 14...
Spring, 15... Damper, 16... Magnetic field generating means, 17... Coil bobbin, 18-21... Coil, 22... Coil, 23... Gap, 18-
1, 18-2, 19-1, 19-2, 20-1,
20-2, 21-1, 21-2...Coil conductor wire.
Claims (1)
報を読み取るために、レンズを前記記録媒体の媒
体面に垂直な第１の方向に駆動するための第１の
コイルと前記レンズを前記媒体面に平行で情報ト
ラツクを横切る第２の方向に駆動するための第２
のコイルとが前記レンズを保持するためのレンズ
保持体と一体となつて移動するように、前記第１
と第２の両コイルを前記レンズ保持体に実質的に
固定すると共に、ベースと前記レンズ保持体とを
弾性部材で連結し、前記レンズを前記第１と第２
の両方向に駆動するようにしたピツクアツプ装置
において、 前記第１のコイルと前記第２のコイルの両方の
コイルに前記媒体面に垂直な導線配列面を形成さ
せ、前記ベースに磁界発生手段を固定して該磁界
発生手段から発した前記媒体面に平行な磁束を前
記第１のコイルと前記第２のコイルのそれぞれの
前記導線配列面へ差し向けるように構成し、前記
コイルへの通電と前記磁束との交差とにより前記
第１のコイルに生じる前記媒体面に垂直な力と、
前記第２のコイルに生じる前記媒体面に平行な力
を利用して前記レンズを前記第１の方向と前記第
２の方向に駆動するようにしたことを特徴とする
ピツクアツプ装置。[Scope of Claims] 1. A first coil for driving a lens in a first direction perpendicular to the medium surface of the recording medium in order to read information on a recording medium in which information is recorded in a track shape; a second direction for driving the lens in a second direction parallel to the media plane and across the information track;
The first coil moves together with the lens holder for holding the lens.
and a second coil are substantially fixed to the lens holder, a base and the lens holder are connected by an elastic member, and the lens is fixed to the first and second coils.
In the pickup device which is driven in both directions, both the first coil and the second coil form a conductor array plane perpendicular to the medium surface, and a magnetic field generating means is fixed to the base. is configured to direct the magnetic flux parallel to the medium surface emitted from the magnetic field generating means to the conducting wire arrangement surface of each of the first coil and the second coil, and energizes the coil and directs the magnetic flux parallel to the medium surface. a force perpendicular to the medium surface generated on the first coil by the intersection of
A pickup device characterized in that the lens is driven in the first direction and the second direction by using a force parallel to the medium surface generated in the second coil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18502185A JPS6182338A (en) | 1985-08-24 | 1985-08-24 | Pickup device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18502185A JPS6182338A (en) | 1985-08-24 | 1985-08-24 | Pickup device |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2678A Division JPS5494007A (en) | 1978-01-05 | 1978-01-05 | Pickup for disc recorder recorded optically with information |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6182338A JPS6182338A (en) | 1986-04-25 |
| JPH0447900B2 true JPH0447900B2 (en) | 1992-08-05 |
Family
ID=16163386
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18502185A Granted JPS6182338A (en) | 1985-08-24 | 1985-08-24 | Pickup device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6182338A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2537397B2 (en) * | 1989-03-30 | 1996-09-25 | 旭光学工業株式会社 | Optical pickup device |
| AT392550B (en) * | 1989-07-26 | 1991-04-25 | Philips Nv | COIL ARRANGEMENT FOR AN OPTICAL SCANNER AND USE OF SUCH A COIL ARRANGEMENT IN AN OPTICAL SCANNER |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS51114102A (en) * | 1975-04-01 | 1976-10-07 | Victor Co Of Japan Ltd | Signal reading and control device for disc player |
| JPS5255423A (en) * | 1975-10-31 | 1977-05-06 | Olympus Optical Co Ltd | Information detection head of information reader |
| JPS52138903A (en) * | 1976-05-12 | 1977-11-19 | Philips Nv | Optical scanner |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5138326Y2 (en) * | 1972-06-30 | 1976-09-20 |
-
1985
- 1985-08-24 JP JP18502185A patent/JPS6182338A/en active Granted
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS51114102A (en) * | 1975-04-01 | 1976-10-07 | Victor Co Of Japan Ltd | Signal reading and control device for disc player |
| JPS5255423A (en) * | 1975-10-31 | 1977-05-06 | Olympus Optical Co Ltd | Information detection head of information reader |
| JPS52138903A (en) * | 1976-05-12 | 1977-11-19 | Philips Nv | Optical scanner |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6182338A (en) | 1986-04-25 |
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