JPS6313170B2 - - Google Patents
Info
- Publication number
- JPS6313170B2 JPS6313170B2 JP18551481A JP18551481A JPS6313170B2 JP S6313170 B2 JPS6313170 B2 JP S6313170B2 JP 18551481 A JP18551481 A JP 18551481A JP 18551481 A JP18551481 A JP 18551481A JP S6313170 B2 JPS6313170 B2 JP S6313170B2
- Authority
- JP
- Japan
- Prior art keywords
- elastic body
- plate
- rectangular coil
- galvanometer mirror
- 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.)
- Expired
Links
- 230000003287 optical effect Effects 0.000 claims description 18
- 238000004804 winding Methods 0.000 claims description 5
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 238000000926 separation method Methods 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
- G11B7/09—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
Landscapes
- Mounting And Adjusting Of Optical Elements (AREA)
- Mechanical Optical Scanning Systems (AREA)
- Optical Recording Or Reproduction (AREA)
Description
【発明の詳細な説明】
この発明は、光ピツクアツプ装置のガルバノミ
ラー回動支持装置に係り、特にガルバノミラーの
裏面に板状弾性体を取り付け、該ガルバノミラー
の該板状弾性体と直交する両側面に巻線方向が該
ガルバノミラーと45度傾いた中空の角形コイルの
一側面を該板状弾性体を中心として上下に対称に
取り付け、該角形コイルの中空部に永久磁石片と
磁性片とからなる中空の磁石を配置して該磁石を
ピツクアツプベースに固定し、該板状弾性体より
双方に出された軸を該角形コイルの他側面の外側
のピツクアツプベース上に軸架したことを特徴と
する光ピツクアツプ装置のガルバノミラー回動支
持装置に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a galvano mirror rotation support device for an optical pickup device, and in particular, a plate-like elastic body is attached to the back surface of the galvano mirror, and both sides of the galvano mirror perpendicular to the plate-like elastic body are attached to the rear surface of the galvano mirror. One side of a hollow rectangular coil whose winding direction is inclined at 45 degrees with respect to the galvanometer mirror is attached vertically symmetrically around the plate-like elastic body, and a permanent magnet piece and a magnetic piece are installed in the hollow part of the rectangular coil. A hollow magnet consisting of is arranged, the magnet is fixed to a pick-up base, and the shaft extending from the plate-like elastic body on both sides is mounted on the pick-up base outside the other side of the rectangular coil. This invention relates to a galvanometer mirror rotation support device for an optical pickup device.
従来の光ピツクアツプ装置におけるフオーカス
およびトラツキング制御の一例を第１図に示すが
これによると、フオーカス（Ｚ軸方向）制御は、
リング状の永久磁石１Ａの上面に磁性片１Ｂ、下
面に管フランジ状の磁性片１Ｃを取り付け、両磁
性片間に形成された空隙に対物レンズ２が装着さ
れた対物レンズ駆動用ボイスコイル１Ｄを入れ、
このコイル１Ｄに流れる電流によりフレミングの
左手の法則に基づいて、対物レンズ駆動用ボイス
コイル１Ｄを上下（Ｚ軸方向）に移動せしめるい
わゆるボイスコイル電磁駆動１によつて行つてい
る。またトラツキング（Ｘ軸方向）制御は、ガル
バノミラー３の裏面のＸ軸方向の両端に永久磁石
３Ａを取り付け、ガルバノミラー３中心部を１点
支持する弾性体３ＢをＸ軸に対してある角度をも
つたベース部３Ｃに固定するとともに、ガルバノ
ミラー３を囲むコイル３Ｄをベース部３Ｃに固定
し、このコイル３Ｄに流れる電流によりガルバノ
ミラー３を矢印の方向に回動せしめることによつ
て行つている。なおこの光ピツクアツプ装置にお
ける光学系の作用は、第２図に示すよう半導体レ
ーザ４から出た光ビームはコリメータレンズ５で
平行ビームにされ、偏光ビームスプリツタ６、1/
４波長板７を経てガルバノミラー３で90゜偏向され
対物レンズ２を経てデイスク情報面８に収束し、
反射光は対物レンズ２、ガルバノミラー３、1/4
波長板７と戻り偏光ビームスプリツタ６で90゜偏
向され遮光板９、収束用レンズ１０を経て光セン
サー１１に至つてフオーカス誤差信号、トラツキ
ング誤差信号および情報信号を得るものである。 An example of focus and tracking control in a conventional optical pickup device is shown in Fig. 1. According to this, focus (Z-axis direction) control is as follows:
A magnetic piece 1B is attached to the upper surface of the ring-shaped permanent magnet 1A, a tube flange-shaped magnetic piece 1C is attached to the lower surface, and an objective lens driving voice coil 1D is installed in which the objective lens 2 is attached to the gap formed between both magnetic pieces. Get in,
This is performed by a so-called voice coil electromagnetic drive 1 that moves the objective lens driving voice coil 1D up and down (in the Z-axis direction) based on Fleming's left-hand rule using a current flowing through the coil 1D. Tracking (X-axis direction) control is achieved by attaching permanent magnets 3A to both ends of the back side of the galvano mirror 3 in the X-axis direction, and moving an elastic body 3B that supports the center of the galvano mirror 3 at a certain angle to the X-axis. This is done by fixing the coil 3D surrounding the galvanometer mirror 3 to the base part 3C, and rotating the galvanometer mirror 3 in the direction of the arrow by the current flowing through the coil 3D. . The operation of the optical system in this optical pickup device is as shown in FIG.
It passes through a four-wavelength plate 7, is deflected by 90 degrees by a galvano mirror 3, passes through an objective lens 2, and converges on a disk information surface 8.
Reflected light is from objective lens 2, galvano mirror 3, and 1/4
The beam is deflected by 90 degrees by the wavelength plate 7 and return polarization beam splitter 6, passes through the light shielding plate 9 and the converging lens 10, and reaches the optical sensor 11 to obtain a focus error signal, a tracking error signal, and an information signal.
しかるに光ピツクアツプ装置を小型軽量化する
ためには、薄形にするすなわちＺ軸方向の長さを
短縮することも有力な手段であるが、従来の技術
においてはＸ軸に対してある角度をもつたベース
部３Ｃからベース部３Ｃ面に対して垂直に突設さ
れた弾性体３Ｂでガルバノミラー３を１点支持し
かつコイル３Ｄはガルバノミラー３を囲むように
ベース部３Ｃ面に対して垂直にベース部３Ｃに固
定して傾斜をもつて、ガルバノミラー３を回動支
持していたためコイル３Ｄの高さＨは薄形化を図
る際障害となるという問題点があつた。 However, in order to make the optical pickup device smaller and lighter, it is effective to make it thinner, that is, to shorten the length in the Z-axis direction. The galvano mirror 3 is supported at one point by an elastic body 3B that protrudes from the base portion 3C perpendicularly to the surface of the base portion 3C, and the coil 3D extends perpendicularly to the surface of the base portion 3C so as to surround the galvano mirror 3. Since the galvanometer mirror 3 was rotatably supported by being fixed to the base portion 3C and tilted, there was a problem in that the height H of the coil 3D became an obstacle when trying to make the coil 3D thinner.
この発明は、このような従来技術の問題点に着
目してなされたもので、ガルバノミラーの裏面に
板状弾性体を取り付け、該ガルバノミラーの該板
状弾性体と直交する両側面に巻線方向が該ガルバ
ノミラーと45度傾いた中空の角形コイルの一側面
を該板状弾性体を中心として上下に対称に取り付
け、該角形コイルの中空部に永久磁石片と磁性片
とからなる中空の磁石を配置して該磁石をピツク
アツプベースに固定し、該板状弾性体より双方に
出された軸を該角形コイルの他側面の外側のピツ
クアツプベース上に軸架したことによつて上記問
題点を解決することを目的としている。 This invention was made by focusing on the problems of the prior art, and involves attaching a plate-shaped elastic body to the back surface of a galvanomirror, and winding wires on both sides of the galvanometer mirror orthogonal to the plate-shaped elastic body. One side of a hollow rectangular coil whose direction is inclined at 45 degrees with respect to the galvano mirror is attached vertically symmetrically around the plate-like elastic body, and a hollow made of a permanent magnet piece and a magnetic piece is installed in the hollow part of the rectangular coil. The above problem was solved by arranging a magnet, fixing the magnet to a pick-up base, and mounting the shafts protruding from both sides of the plate-like elastic body on the pick-up base on the outside of the other side of the rectangular coil. It aims to solve the problem.
以下、この発明を図面に基づいて説明する。 The present invention will be explained below based on the drawings.
第３図は、この発明の一実施例を示す分解斜視
図である。 FIG. 3 is an exploded perspective view showing an embodiment of the present invention.
まず構成を説明すると、１２は板状弾性体でガ
ルバノミラー３の裏面中央部に固着されている。
板状弾性体１２の長手方向両側端からは、ガルバ
ノミラー３を回動支持する軸１３が突設してい
る。１４は角形コイルで、その長手方向の一側面
がガルバノミラー３の板状弾性体１２と直交する
両側面でかつ板状弾性体１２を中心として上下に
対称する位置に、巻線方向がガルバノミラー３と
45度傾いた状態で取り付けられている。 First, the structure will be explained. Reference numeral 12 is a plate-shaped elastic body fixed to the center of the back surface of the galvano mirror 3.
A shaft 13 for rotatably supporting the galvanometer mirror 3 is protruded from both ends of the plate-like elastic body 12 in the longitudinal direction. 14 is a rectangular coil, one side of which in the longitudinal direction is on both sides perpendicular to the plate-like elastic body 12 of the galvanometer mirror 3, and the winding direction is a galvano-mirror in a vertically symmetrical position with the plate-like elastic body 12 as the center. 3 and
It is mounted at a 45 degree angle.
１５は磁石で、２個の永久磁石片１５Ａと２個
の磁性片１５Ｂとから構成され、その高さＨは、
角形コイル１４の高さH1、角形コイル１４間の
上下離隔距離をＧとするとＨ≧2H1＋Ｇに定め
る。また長さＬおよび幅Ｗは角形コイル１４の長
さ・幅よりも小さく定める。そして磁石１５は角
形コイル１４の中空部に配置され水平な光ピツク
アツプベース１６に固定される。軸１３は磁石１
５の中空部を貫通して、角形コイル１４の他側面
の外側の光ピツクアツプベース１６上に設けられ
た１対の軸承１７で軸承される。 15 is a magnet, which is composed of two permanent magnet pieces 15A and two magnetic pieces 15B, and its height H is:
When the height H 1 of the rectangular coil 14 and the vertical separation distance between the rectangular coils 14 are G, it is determined that H≧2H 1 +G. Further, the length L and width W are set to be smaller than the length and width of the rectangular coil 14. The magnet 15 is placed in the hollow part of the rectangular coil 14 and fixed to a horizontal optical pickup base 16. The shaft 13 is the magnet 1
5 and is supported by a pair of bearings 17 provided on the optical pickup base 16 on the outside of the other side of the rectangular coil 14.
軸１３の光ピツクアツプベース１６上からの高
さは、ガルバノミラー３の右端Ｒが光ピツクアツ
プベース１６上に接触してそれ以上時計方向に回
転する必要がない状態において定める。そして下
の角形コイル１４は回転しても光ピツクアツプベ
ース１６に接触しないように光ピツクアツプベー
ス１６と所定の間隔をもつてガルバノミラー３に
取り付けられる。こうすることによつてガルバノ
ミラー３の右端Ｒと軸承１７は同一平面上に位置
してガルバノミラー回動支持装置のＺ軸方向の長
さを短縮することができる。 The height of the shaft 13 from above the optical pickup base 16 is determined in a state in which the right end R of the galvanometer mirror 3 contacts the optical pickup base 16 and does not need to rotate any further clockwise. The lower rectangular coil 14 is attached to the galvanometer mirror 3 at a predetermined distance from the optical pickup base 16 so that it does not come into contact with the optical pickup base 16 even when rotated. By doing so, the right end R of the galvano mirror 3 and the shaft bearing 17 are located on the same plane, and the length of the galvano mirror rotation support device in the Z-axis direction can be shortened.
次に作用を説明する。角形コイル１４に電流が
流れないときはガルバノミラー３は定められた位
置に静止している。 Next, the effect will be explained. When no current flows through the rectangular coil 14, the galvanometer mirror 3 remains stationary at a predetermined position.
角形コイル１４に図示のような向きに電流が流
れるとフレミングの左手の法則に基づいて図示の
ように角形コイル１４の左端Ｌは下向き、右端Ｒ
は上向きの力を受ける。そして上の角形コイル１
４の左端Ｌがガルバノミラー３の左端Ｌに、下の
角形コイル１４の右端Ｒがガルバノミラー３の右
端Ｒに固定されているのでガルバノミラー３は反
時計方向に回転する。電流の方向を逆にすると反
転する。電流の方向および大きさを制御すること
によりガルバノミラー３を一定角度回動させてト
ラツキング制御を行う。 When current flows through the rectangular coil 14 in the direction shown in the figure, the left end L of the rectangular coil 14 points downward and the right end R points downward, based on Fleming's left hand rule.
receives an upward force. And the square coil 1 above
4 is fixed to the left end L of the galvano mirror 3, and the right end R of the lower rectangular coil 14 is fixed to the right end R of the galvano mirror 3, so the galvano mirror 3 rotates counterclockwise. Reversing the direction of the current reverses it. Tracking control is performed by rotating the galvanometer mirror 3 by a certain angle by controlling the direction and magnitude of the current.
以上説明してきたように、この発明は、ガルバ
ノミラーの裏面に板状弾性体を取り付け、該ガル
バノミラーの該板状弾性体と直交する両側面に巻
線方向が該ガルバノミラーと45度傾いた中空の角
形コイルの一側面を該板状弾性体を中心として上
下に対称に取り付け、該角形コイルの中空部に永
久磁石片と磁性片とからなる中空の磁石を配置し
て該磁石をピツクアツプベースに固定し、該板状
弾性体より双方に出された軸を該角形コイルの他
側面の外側のピツクアツプベース上に軸架したこ
とによつて、ガルバノミラー回動支持を水平にし
て、ガルバノミラー回動支持装置のＺ軸方向の長
さを短縮でき光ピツクアツプ装置の小型薄形化を
図ることができるという効果が得られる。 As explained above, this invention has a plate-like elastic body attached to the back surface of a galvanomirror, and winding directions on both sides of the galvanomirror perpendicular to the plate-like elastic body are inclined at 45 degrees with respect to the galvanomirror. One side of a hollow rectangular coil is attached vertically symmetrically around the plate-like elastic body, a hollow magnet consisting of a permanent magnet piece and a magnetic piece is placed in the hollow part of the rectangular coil, and the magnet is placed on a pick-up base. By fixing the shafts extending from the plate-like elastic body to both sides on the pick-up base on the outside of the other side of the rectangular coil, the galvano mirror rotation support is made horizontal, and the galvano mirror can be rotated horizontally. The length of the rotation support device in the Z-axis direction can be shortened, and the optical pickup device can be made smaller and thinner.
第１図は従来技術の要部断面図、第２図は光学
系の説明図、第３図はこの発明の一実施例を示す
分解斜視図である。
１……ボイスコイル電磁駆動、２……対物レン
ズ、３……ガルバノミラー、４……半導体レー
ザ、５……コリメータレンズ、６……偏向ビーム
スプリツタ、７……1/4波長板、８……デイスク
情報面、９……遮光板、１０……収束用レンズ、
１１……光センサ、１２……板状弾性体、１３…
…軸、１４……角形コイル、１５……磁石、１６
……光ピツクアツプベース、１７……軸承。
FIG. 1 is a sectional view of a main part of the prior art, FIG. 2 is an explanatory diagram of an optical system, and FIG. 3 is an exploded perspective view showing an embodiment of the present invention. 1... Voice coil electromagnetic drive, 2... Objective lens, 3... Galvanometer mirror, 4... Semiconductor laser, 5... Collimator lens, 6... Deflection beam splitter, 7... 1/4 wavelength plate, 8 ... Disk information surface, 9 ... Light shielding plate, 10 ... Convergence lens,
11... Optical sensor, 12... Plate-shaped elastic body, 13...
...Axis, 14...Square coil, 15...Magnet, 16
...Optical pick-up base, 17...Axis bearing.
Claims (1)
け、該ガルバノミラーの該板状弾性体と直交する
両側面に巻線方向が該ガルバノミラーと45度傾い
た中空の角形コイルの一側面を該板状弾性体を中
心として上下に対称に取り付け、該角形コイルの
中空部に永久磁石片と磁性片とからなる中空の磁
石を配置して該磁石をピツクアツプベースに固定
し、該板状弾性体より双方に出された軸を該角形
コイルの他側面の外側のピツクアツプベース上に
軸架したことを特徴とする光ピツクアツプ装置の
ガルバノミラー回動支持装置。1. Attach a plate-shaped elastic body to the back surface of the galvanometer mirror, and attach one side of the hollow rectangular coil whose winding direction is inclined at 45 degrees to the galvanometer mirror on both sides of the galvanometer mirror perpendicular to the plate-shaped elastic body. A hollow magnet consisting of a permanent magnet piece and a magnetic piece is placed in the hollow part of the rectangular coil, and the magnet is fixed to a pick-up base. A galvanometer mirror rotation support device for an optical pickup device, characterized in that the shafts extending from both sides are mounted on a pickup base outside the other side of the rectangular coil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18551481A JPS5888837A (en) | 1981-11-20 | 1981-11-20 | Galvanomirror rotary supporter of optical pickup device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18551481A JPS5888837A (en) | 1981-11-20 | 1981-11-20 | Galvanomirror rotary supporter of optical pickup device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5888837A JPS5888837A (en) | 1983-05-27 |
| JPS6313170B2 true JPS6313170B2 (en) | 1988-03-24 |
Family
ID=16172110
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18551481A Granted JPS5888837A (en) | 1981-11-20 | 1981-11-20 | Galvanomirror rotary supporter of optical pickup device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5888837A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6370825A (en) * | 1986-09-12 | 1988-03-31 | Matsushita Electric Ind Co Ltd | Vibrating mirror device |
-
1981
- 1981-11-20 JP JP18551481A patent/JPS5888837A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5888837A (en) | 1983-05-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4568142A (en) | Objective lens drive apparatus | |
| US20010038581A1 (en) | Optical pickup | |
| JP2740400B2 (en) | Object pickup lens driving device for optical pickup | |
| US6714364B2 (en) | Optical pick-up actuator | |
| JPS6313170B2 (en) | ||
| US5703730A (en) | Lens drive apparatus | |
| JP2798992B2 (en) | Information recording / reproducing device | |
| JPH10116428A (en) | Optical pickup device | |
| JP3772398B2 (en) | Optical pickup device | |
| JPS635807B2 (en) | ||
| JP3247217B2 (en) | Optical pickup actuator | |
| JPS6233658B2 (en) | ||
| JPS635806B2 (en) | ||
| JPS6233655B2 (en) | ||
| JPS635808B2 (en) | ||
| JPS6233657B2 (en) | ||
| JPH04351722A (en) | Actuator for optical pickup | |
| JP2658177B2 (en) | Objective lens actuator | |
| JPH04205927A (en) | Objective lens driving mechanism for optical pickup | |
| KR100230268B1 (en) | Objective lens drive | |
| KR0150953B1 (en) | Objective lens driver | |
| JP2703602B2 (en) | Galvano mirror support device for pickup device | |
| JPH05266503A (en) | Optical head | |
| JPH08147737A (en) | Objective lens drive | |
| JPS6233656B2 (en) |