JPS6362810B2 - - Google Patents
Info
- Publication number
- JPS6362810B2 JPS6362810B2 JP11456080A JP11456080A JPS6362810B2 JP S6362810 B2 JPS6362810 B2 JP S6362810B2 JP 11456080 A JP11456080 A JP 11456080A JP 11456080 A JP11456080 A JP 11456080A JP S6362810 B2 JPS6362810 B2 JP S6362810B2
- Authority
- JP
- Japan
- Prior art keywords
- lens barrel
- fixed
- lens
- barrel
- flexible members
- 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 5
- 206010010071 Coma Diseases 0.000 description 2
- 230000004075 alteration Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229920005549 butyl rubber Polymers 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 230000035945 sensitivity 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
Landscapes
- Mechanical Optical Scanning Systems (AREA)
- Optical Recording Or Reproduction (AREA)
- Optical Head (AREA)
Description
【発明の詳細な説明】
本発明はビデオデイスク等の光学的に情報を読
取り、あるいは記録する装置において、情報トラ
ツクに光スポツトを正確にトレースさせるための
光学走査装置に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an optical scanning device for accurately tracing a light spot on an information track in a device for optically reading or recording information such as a video disk.
従来の光学式ビデオデイスクにおいては、光ス
ポツトの走査の方式としては、集光レンズをデイ
スク面に対して上下に振る装置と、集光レンズに
入る前の光束をトラツクに垂直な方向と平行な方
向に振るための２つのスキヤニングミラーが必要
であつた。ところが、例えば、集光レンズを３次
元に振ることができれば、上記の３素子を１素子
にすることが可能である。また、光源に小型の半
導体レーザを使用すれば、光源を含め、全光学系
を一体化して、３次元に振ることができれば、光
学読取りヘツドとして著しく小型化、低コスト化
が可能となる。 In conventional optical video discs, the light spot scanning method uses a device that swings a condenser lens up and down with respect to the disk surface, and a device that moves the light beam before entering the condenser lens in a direction perpendicular to and parallel to the track. Two scanning mirrors were required for orientation. However, for example, if the condenser lens can be moved three-dimensionally, it is possible to combine the three elements described above into one element. Furthermore, if a small semiconductor laser is used as a light source, and the entire optical system including the light source can be integrated and operated in three dimensions, it becomes possible to significantly reduce the size and cost of the optical reading head.
なお、集光レンズはデイスク表面に対し、水平
および垂直に加振する必要がある。集光レンズが
傾くと、デイスクの保護層の影響でコマ収差が出
るからである。 Note that the condenser lens needs to be vibrated horizontally and vertically with respect to the disk surface. This is because if the condenser lens is tilted, coma aberration will occur due to the influence of the disk's protective layer.
本発明は集光レンズをデイスク面に対して３次
元に移動せしめる装置を提供するもので、以下図
面を参照してその実施例をあげ説明する。 The present invention provides a device for moving a condensing lens three-dimensionally with respect to a disk surface, and examples thereof will be described below with reference to the drawings.
第１図において、１は集光レンズを内蔵した鏡
筒であり、その上端側面部には等間隔に４つの独
立したコイル３ａ，３ｂ，３ｃ，３ｄが固着され
ている。また、前記鏡筒１の先端部には、コイル
３ｅが設けられている。 In FIG. 1, reference numeral 1 denotes a lens barrel containing a condensing lens, and four independent coils 3a, 3b, 3c, and 3d are fixed to the upper end side surface of the lens barrel at equal intervals. Further, a coil 3e is provided at the tip of the lens barrel 1.
前記鏡筒１は、折曲されてコ字状に形成された
ゴム、金属等よりなる可撓性材２ａ，２ｂ，２
ｃ，２ｄによつて固定部（図示せず）に連結され
ている。ここで可撓性材２ａ，２ｂ，２ｃ，２ｄ
の中央辺が鏡筒１に固着され、その両辺の先端が
固定部に固着されることによつて、鏡筒が移動し
ても傾かないように支持されている。 The lens barrel 1 includes flexible members 2a, 2b, 2 made of rubber, metal, etc. that are bent into a U-shape.
It is connected to a fixed part (not shown) by c and 2d. Here, flexible members 2a, 2b, 2c, 2d
The center side of the lens barrel 1 is fixed to the lens barrel 1, and the ends of both sides of the lens barrel are fixed to fixed parts, so that the lens barrel is supported so as not to tilt even when the lens barrel moves.
すなわち、鏡筒１は左右、前後および上下に移
動可能に前記可撓性材２ａ，２ｂ，２ｃ，２ｄに
よつて固定部に支持されている。４ａ，４ｂ，４
ｃ，４ｄ（４ａ，４ｃは図示せず）はそれぞれ磁
石であり、一端部が前記固定部に固着され、他端
部は前記コイル４ａ，４ｂ，４ｃ，４ｄ内に挿入
されている。（４ｃのみ挿入状態を示す）。４ｅは
中央部に光束の通る透孔５を有する円筒状の磁石
であり、その外周部は前記固定部に固定された状
態で、前記コイル３ｅに挿入されている。すなわ
ち、前記コイル３ａ，３ｂ，３ｃ，３ｄ，３ｅと
磁石４ａ，４ｂ，４ｃ，４ｄ，４ｅとの間でそれ
ぞれ電磁駆動手段を構成し、前記コイル３ａ，３
ｂ，３ｃ，３ｄ，３ｅに選択的に電流を流すこと
により、鏡筒１を前後、左右、上下に選択的に移
動可能に構成されている。すなわち、鏡筒１を３
次元的に移動可能に構成されている。 That is, the lens barrel 1 is supported on a fixed portion by the flexible members 2a, 2b, 2c, and 2d so as to be movable left and right, front and back, and up and down. 4a, 4b, 4
C and 4d (4a and 4c are not shown) are magnets, one end of which is fixed to the fixed portion, and the other end inserted into the coils 4a, 4b, 4c, and 4d. (Only 4c shows the inserted state). Reference numeral 4e designates a cylindrical magnet having a through hole 5 in the center thereof through which a light beam passes, and its outer peripheral portion is inserted into the coil 3e while being fixed to the fixed portion. That is, electromagnetic driving means is constructed between the coils 3a, 3b, 3c, 3d, 3e and the magnets 4a, 4b, 4c, 4d, 4e, respectively, and the coils 3a, 3
The lens barrel 1 is configured to be selectively movable back and forth, left and right, and up and down by selectively passing a current through b, 3c, 3d, and 3e. In other words, lens barrel 1 is
It is configured to be dimensionally movable.
第２図および第３図はそれぞれ本発明の他の実
施例を示すもので、第２図は可撓性材２ａ，２
ｂ，２ｃ，２ｄをそれぞれＵ字状に構成したもの
である。 2 and 3 respectively show other embodiments of the present invention, and FIG. 2 shows flexible members 2a and 2.
b, 2c, and 2d are each configured in a U-shape.
なお、前記可撓性材としては、ブチルゴムが安定
性、ダンピング特性ともに良く、10KHzまで感
度、位相特性とも極めて良好であつた。As the flexible material, butyl rubber had good stability and damping characteristics, and had extremely good sensitivity and phase characteristics up to 10 KHz.
以上のように、本発明によれば、集光レンズを
含む鏡筒を３次元に移動可能なものであるため、
簡単な構成で、情報トラツクにスポツトを集光せ
しめた状態で良好なトラツキングが得られるもの
である。そして、上記の構成により、支持部材と
してコ字状あるいはＵ字状の可撓性材を用いてそ
の中央辺で鏡筒を支持するようにしたので、集光
レンズを含む鏡筒を軸方向の傾きが少ない状態で
２次元方向に駆動することができ、コマ収差等が
発生せず、安定なサーボ特性と良好な再生特性が
得られるという作用効果を奏する。 As described above, according to the present invention, since the lens barrel including the condenser lens can be moved in three dimensions,
With a simple configuration, good tracking can be obtained with a spot focused on the information track. With the above configuration, the lens barrel is supported at its center by using a U-shaped or U-shaped flexible member as a support member, so that the lens barrel including the condenser lens can be moved in the axial direction. It is possible to drive in a two-dimensional direction with little inclination, and there is an advantage that stable servo characteristics and good reproduction characteristics can be obtained without causing coma aberration or the like.
第１図は本発明の１実施例を示す一部分解斜視
図、第２図はそれぞれ本発明の他の実施例を示す
斜視図である。
１……鏡筒、２ａ，２ｂ，２ｃ，２ｄ……可撓
性材、３ａ，３ｃ，３ｃ，３ｄ，３ｅ……コイ
ル、４ａ，４ｂ，４ｃ，４ｄ，４ｅ……磁石。
FIG. 1 is a partially exploded perspective view showing one embodiment of the invention, and FIG. 2 is a perspective view showing another embodiment of the invention. 1... Lens barrel, 2a, 2b, 2c, 2d... Flexible material, 3a, 3c, 3c, 3d, 3e... Coil, 4a, 4b, 4c, 4d, 4e... Magnet.
Claims (1)
くとも内蔵する鏡筒と、それぞれの中央辺が上記
鏡筒の上部と下部とにそれぞれ固定され、それぞ
れの両辺の先端が固定部にそれぞれ固定された鏡
筒支持用のコ字状あるいはＵ字状の複数の可撓性
材と、これらの複数の可撓性材の中間の位置にお
いて前記固定部と鏡筒との間に設けられ、前記鏡
筒の中間付近に前記鏡筒の軸方向と垂直な方向の
力を及ぼす電磁駆動手段とを設け、前記鏡筒を傾
けることなく移動駆動するようにしたことを特徴
とする光学走査装置。1 A lens barrel containing at least a condensing lens for condensing light onto a disk, the central sides of each of which are fixed to the upper and lower parts of the lens barrel, and the tips of both sides of each of the lenses are fixed to a fixed part, respectively. a plurality of U-shaped or U-shaped flexible members for supporting the lens barrel; An optical scanning device characterized in that an electromagnetic driving means for applying a force in a direction perpendicular to the axial direction of the lens barrel is provided near the middle of the barrel, and the lens barrel is moved and driven without being tilted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11456080A JPS5737752A (en) | 1980-08-19 | 1980-08-19 | Optical scanner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11456080A JPS5737752A (en) | 1980-08-19 | 1980-08-19 | Optical scanner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5737752A JPS5737752A (en) | 1982-03-02 |
| JPS6362810B2 true JPS6362810B2 (en) | 1988-12-05 |
Family
ID=14640858
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11456080A Granted JPS5737752A (en) | 1980-08-19 | 1980-08-19 | Optical scanner |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5737752A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59185726U (en) * | 1983-05-23 | 1984-12-10 | アイワ株式会社 | pick up device |
| US4646283A (en) * | 1983-05-31 | 1987-02-24 | Matsushita Electric Industrial Co., Ltd. | Objective lens driving apparatus for optical disc player |
| JP3492288B2 (en) * | 2000-06-16 | 2004-02-03 | キヤノン株式会社 | Electromagnetic actuator, method of manufacturing the electromagnetic actuator, and optical deflector using the electromagnetic actuator |
| JP2002159334A (en) * | 2000-11-27 | 2002-06-04 | Yoshida Industry Co Ltd | Tube container with delivery quantity adjusting function |
-
1980
- 1980-08-19 JP JP11456080A patent/JPS5737752A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5737752A (en) | 1982-03-02 |
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