JPS61175937A - Optical recording and reproducing device - Google Patents
Optical recording and reproducing deviceInfo
- Publication number
- JPS61175937A JPS61175937A JP1487485A JP1487485A JPS61175937A JP S61175937 A JPS61175937 A JP S61175937A JP 1487485 A JP1487485 A JP 1487485A JP 1487485 A JP1487485 A JP 1487485A JP S61175937 A JPS61175937 A JP S61175937A
- Authority
- JP
- Japan
- Prior art keywords
- actuator
- optical system
- system housing
- movable body
- objective lens
- 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
Landscapes
- Moving Of The Head For Recording And Reproducing By Optical Means (AREA)
- Optical Recording Or Reproduction (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、レーザ等を光源として、円盤状情報記録媒体
（以下ディスクと称す。）上の所望の位置に集束し、例
えば画像、音声情報を記録あるいは再生する光学式記録
再生装置に関するものである０
従来の技術
従来の光学式記録再生装置としては例えば、特睨目囚６
只−１貴１（”Ｍ バー各位Ｉｒ；呵シｈイ１へスー第
２図は、従来の光学式記録再生装置の平面図、第３図は
正面図である。また第４図は光学系の構成図である。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention focuses a light source such as a laser onto a desired position on a disk-shaped information recording medium (hereinafter referred to as a disk) to record, for example, image or audio information. Or it relates to an optical recording and reproducing apparatus for reproducing.0 Prior Art Conventional optical recording and reproducing apparatuses include, for example,
Figure 2 is a plan view of a conventional optical recording/reproducing device, and Figure 3 is a front view. Figure 4 is a front view of a conventional optical recording/reproducing device. It is a block diagram of a system.
１は、対物レンズ、２は、対物レンズ１を駆動するアク
チュエータ、３は、光学系筐体、４は、アクチュエータ
２及び光学系筐体３を保持するディスク７の半径方向ｘ
ｘに移動可能な可動体である。1 is an objective lens, 2 is an actuator that drives the objective lens 1, 3 is an optical system housing, and 4 is a radial direction x of a disk 7 that holds the actuator 2 and the optical system housing 3.
It is a movable body that can move in x direction.
このアクチュエータ２は、光学系筐体３の上に直接取り
付けられている。This actuator 2 is mounted directly on the optical system housing 3.
また、６は、軸受、６はガイド軸であり、可動体４の移
動時の支持機構を構成している。Further, 6 is a bearing, and 6 is a guide shaft, which constitutes a support mechanism when the movable body 4 moves.
また光学系筐体３の内部を、第４図に示す。Further, the inside of the optical system housing 3 is shown in FIG.
８は半導体レーザ、９はコリメータレンズ、１０はハー
フミラ−１１１は検出用レンズ、１２は光検出器である
。8 is a semiconductor laser, 9 is a collimator lens, 10 is a half mirror, 111 is a detection lens, and 12 is a photodetector.
以下に、この従来例の動作について説明する。The operation of this conventional example will be explained below.
半導体レーザ８から発せられたビームは、コリメータレ
ンズ９によって平行光に変換され、ハーフミラ−１０に
よってアクチュエータ２に平行入射する。この平行光は
対物レンズ１によって微少ビームに絞り込まれディスク
７に照射される。ディスク７からの反射光は、対物レン
ズ１、ハーフミラ−１０、検出用レンズ１１を通って光
検出器１２に入射する。この光検出器１２によってフォ
ーカシング誤差信号及びトラ、ンキング誤差信号が検出
される。その誤差信号に基づいてアクチュエータ２によ
シ対物レンズをｚＺ方向に駆動してフォーカシング制御
を、ｘｘ力方向駆動してトラッキング制御を行なう。ま
た、ディスク上の所望トラ・ンクへのアクセスは、可動
体４をｘｘ力方向移動して行なう。The beam emitted from the semiconductor laser 8 is converted into parallel light by a collimator lens 9, and is made parallel to the actuator 2 by a half mirror 10. This parallel light is focused into a minute beam by the objective lens 1 and irradiated onto the disk 7 . The reflected light from the disk 7 passes through the objective lens 1 , the half mirror 10 , and the detection lens 11 and enters the photodetector 12 . This photodetector 12 detects a focusing error signal and a tracking error signal. Based on the error signal, the actuator 2 drives the objective lens in the z and z directions to perform focusing control, and drives it in the xx force direction to perform tracking control. Further, access to a desired track on the disk is performed by moving the movable body 4 in the xx force direction.
発明が解決しようとする問題点
しかしながら上記の様な構成では、フォーカシング制御
あるいは、トラッキング制御のため対物レンズ１をアク
チュエータ２により、ＺＺ方向あるいはｘｘ力方向駆動
した時、その反力が、光学系筐体３に直接加わることに
なる。Problems to be Solved by the Invention However, in the above configuration, when the objective lens 1 is driven in the ZZ direction or the xx force direction by the actuator 2 for focusing control or tracking control, the reaction force is generated by the optical system housing. It will be added directly to body 3.
その結果、光学系筐体３の機械的共振のため、半導体レ
ーザ８が振動により、光軸が変動し、ビーム制御特性及
び記録再生特性が悪化する。あるいは光検出器１２が振
動して、ビーム制御特性及び記録再生特性が悪化する。As a result, the optical axis of the semiconductor laser 8 fluctuates due to the vibration due to the mechanical resonance of the optical system housing 3, and the beam control characteristics and recording/reproducing characteristics deteriorate. Alternatively, the photodetector 12 may vibrate, deteriorating beam control characteristics and recording/reproducing characteristics.
さらに、光学系筐体３全体の振動によっても同様にビー
ム制御特性及び記録再生特性が悪化するといった問題点
を有していた。Furthermore, there is a problem in that beam control characteristics and recording/reproducing characteristics are similarly deteriorated due to vibration of the entire optical system housing 3.
さらに、アクチュエータのフォーカシング制御及びトラ
フキング制御時の反力によって、光学系筐体３内の光学
部品の取り付けがゆるみ、制御特性及び記録再生特性の
悪化をまねくといった問題点も有していた。Furthermore, there is another problem in that the attachment of optical components within the optical system housing 3 becomes loose due to reaction force during focusing control and traversing control of the actuator, resulting in deterioration of control characteristics and recording/reproducing characteristics.
本発明は、かかる従来の問題点を解消し、フォーカシン
グ制御時、あるいはトラッキング制御時のアクチュエー
タの反力による光学系筐体の機械的振動の発生及び、光
学部品の取り付けのゆるみによる制御特性及び記録再生
特性の悪化を防止した光学式記録再生装置を提供するこ
とを目的とする０
問題点を解決するための手段
本発明は、対物レンズを駆動するアクチュエータと少な
くも光源と光検出器とを備えた光学系筐体と、ディスク
半径方向に移動可能で、かつ前記アクチュエータと光学
系筐体を各々独立に保持する可動体を備えた光学式記録
再生装置である。The present invention solves these conventional problems, and eliminates the occurrence of mechanical vibration in the optical system housing due to the reaction force of the actuator during focusing control or tracking control, and the control characteristics and recording caused by loosening of the attachment of optical components. It is an object of the present invention to provide an optical recording and reproducing apparatus that prevents deterioration of reproduction characteristics. The present invention is an optical recording/reproducing device including an optical system housing having a radial direction, and a movable body that is movable in the radial direction of the disk and independently holding the actuator and the optical system housing.
作 用
本発明は、対物レンズを駆動するアクチュエータと、少
なくとも光源と光検出器を備えた光学系筐体とをディス
ク半径方向に移動可能な可動体に独立に取り付けること
により、アクチュエータがフォーカシング制御及びトラ
ッキング制御を行なう時の反力が、直接、光学系筐体に
加わることを防止できる。Effects of the present invention The actuator that drives the objective lens and the optical system housing that includes at least a light source and a photodetector are independently attached to a movable body that can move in the disk radial direction, so that the actuator performs focusing control and It is possible to prevent reaction force during tracking control from being directly applied to the optical system housing.
従って、前記アクチュエータによる反力が直接光学系筐
体に加わって発生する光学系筐体の機械的振動及び光学
部品の取り付けゆるみによる制御特性及び記録再生の悪
化を防止できる。Therefore, it is possible to prevent deterioration of control characteristics and recording/reproduction caused by mechanical vibration of the optical system housing and loosening of optical components caused by direct application of the reaction force by the actuator to the optical system housing.
実施例
第１図は、本発明の一実施例における光学式記録再生装
置の正面図を示すものである０図中の１〜７は第３図と
同一のものを示している。ここでアクチュエータ２と光
学系筐体３は、各々独立に、可動体４に取り付けられて
いる０またこの可動体４には透穴４１が設けて有り、元
ビーム透過可能となっている。Embodiment FIG. 1 shows a front view of an optical recording/reproducing apparatus according to an embodiment of the present invention. Reference numerals 1 to 7 in FIG. 0 are the same as those in FIG. 3. Here, the actuator 2 and the optical system housing 3 are each independently attached to a movable body 4, and the movable body 4 is provided with a through hole 41 so that the original beam can pass therethrough.
また光学系筐体３の内部には第４図に示したものと同様
半導体レーザ８、光検出器１２等の光学部品が備わって
いる。Further, inside the optical system housing 3, optical components such as a semiconductor laser 8 and a photodetector 12 are provided, similar to those shown in FIG.
以下に本実施例の動作説明を行なう０元検出器１２によ
ってフォーカシング誤差信号及びトラッキング誤差信号
が検出さｎる〇
その誤差信号に基づいてアクチュエータ２により対物レ
ンズ１全駆動して、フォーカシング制御及びトラッキン
グ制御を行なう０
また、ディスク７上の所望トラックへのビームアクセス
は、可動体４を移動させて行なう。The operation of this embodiment will be explained below.A focusing error signal and a tracking error signal are detected by the zero-source detector 12.Based on the error signals, the objective lens 1 is fully driven by the actuator 2 to perform focusing control and tracking. Control 0 Furthermore, beam access to a desired track on the disk 7 is performed by moving the movable body 4.
以上のように本実施例によれば、アクチュエータ２と光
学系筐体３とが各々分離独立して、可動体４に取り付け
ら几ている。As described above, according to this embodiment, the actuator 2 and the optical system housing 3 are attached to the movable body 4 separately and independently.
従って、対物レンズ１全アクチユエータ２により、駆動
して、フォーカシング制御及びトラッキング制御を行な
う時の、反力は可動体４により吸収さ几、直接光学系筐
体３に伝わることは無い。Therefore, when the objective lens 1 is driven by the entire actuator 2 to perform focusing control and tracking control, the reaction force is absorbed by the movable body 4 and is not directly transmitted to the optical system housing 3.
このため、アクチュエータ２の反力によって、光学系筐
体３の機械的共振１光学部品の取り付けゆるみによる制
御特性及び記録再生特性の悪化を生じることがない。Therefore, the reaction force of the actuator 2 does not cause deterioration of the control characteristics and recording/reproducing characteristics due to loosening of the attachment of the mechanical resonance 1 optical component of the optical system housing 3.
なお、本実施例においては可動体４の断面形状ｙＬ字形
としたが、この断面形状に限定さ几ることばなくアクチ
ュエータ２及び光学系筐体３が分離独立して取り付ける
ことが可能であり、かつアクチュエータ２のフォーカシ
ング制御及びトラッキング制御時の反力を吸収できる構
造であれば、本実施例と同様の効果を得ることができる
。In this embodiment, the cross-sectional shape of the movable body 4 is YL-shaped, but the actuator 2 and the optical system housing 3 can be attached separately and independently without being limited to this cross-sectional shape. As long as the structure is capable of absorbing the reaction force during focusing control and tracking control of the actuator 2, the same effects as in this embodiment can be obtained.
発明の詳細
な説明した様に、本発明によれば、アクチュエータ２の
フォーカシング制御時及びトラッキング制御時における
反力が直接光学系筐体に加わることを防止できる。As described in detail, according to the present invention, it is possible to prevent reaction force from being directly applied to the optical system housing during focusing control and tracking control of the actuator 2.
従って、光学系筐体の機械的共振１光学部品取り付けの
ゆるみ発生による制御特性及び記録再生特性の悪化を防
止した光学式記録再生装置全提供することができる。Therefore, it is possible to provide an entire optical recording and reproducing apparatus in which deterioration of control characteristics and recording and reproducing characteristics due to loosening of the mechanical resonance 1 optical component attached to the optical system housing is prevented.
第１図は本発明における一実施例の光学式記録再生装置
の正面図、第２図は従来例の光学式記録再生装置の平面
図、第３図は同従来例の正面図、第４図は同従来例の光
学系構成図である。
１・・・・・・対物レンズ、２・・・・・・アクチュエ
ータ、３・・・・・・光学系筐体、４・・・・・・可動
体、７・・・・・・ディスク。
代理人の氏名 弁理士 中 尾 敏 男 ほか１名第
１ 図 ｆ・・
・ 対］勿しンス゛２・・・ アクチェエータ
３・・・光学光ざ林
４・・・４竜θ ２本
７・・・ディスク
第２図FIG. 1 is a front view of an optical recording/reproducing apparatus according to an embodiment of the present invention, FIG. 2 is a plan view of a conventional optical recording/reproducing apparatus, FIG. 3 is a front view of the conventional example, and FIG. is a configuration diagram of an optical system of the conventional example. DESCRIPTION OF SYMBOLS 1... Objective lens, 2... Actuator, 3... Optical system housing, 4... Movable body, 7... Disc. Name of agent: Patent attorney Toshio Nakao and 1 other person
1 Figure f...
・ Pair] Of course 2... Actuator 3... Optical light forest 4... 4 dragon θ 2 pieces 7... Disc figure 2
Claims (1)
源と光検出器を備えた光学系筐体と、ディスク半径方向
に移動可能で、かつ前記アクチュエータと光学系筐体と
が互いに分離した状態で取り付けられた可動体を有する
ことを特徴とする光学式記録再生装置。an actuator that drives an objective lens; an optical system housing that includes at least a light source and a photodetector; An optical recording/reproducing device characterized by having a body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1487485A JPS61175937A (en) | 1985-01-29 | 1985-01-29 | Optical recording and reproducing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1487485A JPS61175937A (en) | 1985-01-29 | 1985-01-29 | Optical recording and reproducing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61175937A true JPS61175937A (en) | 1986-08-07 |
Family
ID=11873158
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1487485A Pending JPS61175937A (en) | 1985-01-29 | 1985-01-29 | Optical recording and reproducing device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61175937A (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6122448A (en) * | 1984-07-10 | 1986-01-31 | Fujitsu Ltd | Optical head positioning device |
-
1985
- 1985-01-29 JP JP1487485A patent/JPS61175937A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6122448A (en) * | 1984-07-10 | 1986-01-31 | Fujitsu Ltd | Optical head positioning device |
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