JPH03187028A - Optical recording and reproducing device - Google Patents
Optical recording and reproducing deviceInfo
- Publication number
- JPH03187028A JPH03187028A JP1326255A JP32625589A JPH03187028A JP H03187028 A JPH03187028 A JP H03187028A JP 1326255 A JP1326255 A JP 1326255A JP 32625589 A JP32625589 A JP 32625589A JP H03187028 A JPH03187028 A JP H03187028A
- Authority
- JP
- Japan
- Prior art keywords
- objective lens
- actuator
- half mirror
- recording
- light beam
- 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
- Optical Head (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は光学的手段により情報の記録再生を行なう光
記録再生装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an optical recording/reproducing apparatus for recording and reproducing information by optical means.
第２図は例えば実開昭６１−６８３２２号公報に開示さ
れた従来の光記録再生装置を示す断面図である。半導体
レーザーなどの光源（１）で発生した光束を平行光線束
にしてハーフミラ−（２）を透過させ、対物レンズ（３
）で収束して記録坦体（４）の記録面にスポットを形成
させる。記録坦体（４）の記録面で反射しｔこ光束を再
び同じ光路を経てハーフミラ−（２）で往光路の平行光
線束から分離し、収束して光検知＃ （５１に入射させ
、記録担体（４）の記録面の情報に対応した電気信号を
検出する。この電気信号を演算回路（６）に入力してフ
ォーカスエラー信号、トラッキングエラー信号などを得
る。FIG. 2 is a sectional view showing a conventional optical recording/reproducing apparatus disclosed in, for example, Japanese Utility Model Application Publication No. 61-68322. A light beam generated by a light source (1) such as a semiconductor laser is converted into a parallel beam and is transmitted through a half mirror (2).
) to form a spot on the recording surface of the recording medium (4). The light beam reflected by the recording surface of the recording medium (4) passes through the same optical path again, is separated from the parallel light beam on the outgoing optical path by the half mirror (2), is converged, and is incident on light detection # (51) for recording. An electrical signal corresponding to information on the recording surface of the carrier (4) is detected.This electrical signal is input to an arithmetic circuit (6) to obtain a focus error signal, a tracking error signal, etc.
ところで、対物レンズ（３）を矢示（Ｆ）の方向に駆動
して記録坦体（４）の記録面に形成したスポットを常に
合焦状態にすると共に矢示（Ｔ）の方向にも駆動してス
ポットを記録坦体の記録面に設けたトラックに追従させ
るようになっており、対物レンズ（３）とこの対物レン
ズ（３）を駆動するアクチュエータ（７）をアクチュエ
ータカバー（８）で包囲して対物レンズ（３）と１クチ
ユニータカバー（８）の間に十分なスペースを設けて対
物レンズ（３）の駆動を妨げないようにしている。By the way, the objective lens (3) is driven in the direction of the arrow (F) to keep the spot formed on the recording surface of the recording medium (4) always in focus, and it is also driven in the direction of the arrow (T). The objective lens (3) and the actuator (7) that drives the objective lens (3) are surrounded by an actuator cover (8). A sufficient space is provided between the objective lens (3) and the single unit cover (8) so as not to impede the driving of the objective lens (3).
従来の光記録再生装置は以上のように構成されているの
で、対物レンズ（３）の表面に！！ｋｌＩが付着したり
、対物レンズ（３）とアクチュエータカバー（８）との
間から侵入したＷｉ塵がハーフミラ−（２）の表面に付
着するが、容易にクリーニングすることができず、光量
が減少したり、フォーカスエラー信号やトラッキングエ
ラー信号にオフセットを生じて性能が低下したす誤動作
すると言う解決すべき課題があった。Since the conventional optical recording/reproducing device is configured as described above, the surface of the objective lens (3)! ! KlI adheres, and Wi dust that enters between the objective lens (3) and the actuator cover (8) adheres to the surface of the half mirror (2), but it cannot be cleaned easily and the amount of light decreases. There are problems that need to be solved, such as offsets occurring in focus error signals and tracking error signals, resulting in degraded performance and malfunction.
この発明は前記のような課題を解決するためになされた
もので、対物レンズやハーフミラ−の表面に微塵が付着
することはなく、また、容易にクリーニングする乙との
できる光記録再生装置を得ることを目的とする。This invention was made in order to solve the above-mentioned problems, and provides an optical recording and reproducing device that does not allow fine dust to adhere to the surface of the objective lens or half mirror and can be easily cleaned. The purpose is to
この発明ばに係る光記録再生装置はレーザ光を発する光
源から出射した光束を平行光線束にしてハーフミラ−を
透過させ、対物レンズで収束して記録坦体の記録面にス
ポットを形成させ、その反射した光束を対物レンズを経
てハーフミラ−で平行光線束から分離し収束して光検知
器に入射させ記録面の情報に対応した電気信号を検出す
るものにおいて、対物レンズとこの対物レンズを駆動す
るアクチュエーターとを光路部分を透明な平行平板ガラ
スにしたアクチュエータカバーで包囲したものである。The optical recording/reproducing device according to the present invention converts a light beam emitted from a light source that emits a laser beam into a parallel light beam, transmits it through a half mirror, and converges it with an objective lens to form a spot on the recording surface of a recording medium. A device that drives the objective lens and the objective lens, in which the reflected beam passes through an objective lens, is separated from a parallel beam by a half mirror, and is converged and incident on a photodetector to detect an electrical signal corresponding to information on the recording surface. The actuator is surrounded by an actuator cover whose optical path portion is made of transparent parallel flat glass.
この発明におけるアクチュエータカバーは対物レンズと
この対物レンズを駆動するアクチュエータとを包囲する
から、対物レンズやハーフミラ−の表面に微塵が付着す
るのを防ぎ、またクリーニングが容易になる。Since the actuator cover in this invention surrounds the objective lens and the actuator that drives the objective lens, it prevents fine dust from adhering to the surfaces of the objective lens and half mirror, and also facilitates cleaning.
以下、この発明の一実施例を図について説明する。第１
図において［１１〜（８）は前記従来の装置と同じもの
であり、（９）は前記アクチュエータカバー（８）の光
路部分に設けた透明な平行平板ガラスである。An embodiment of the present invention will be described below with reference to the drawings. 1st
In the figure, [11 to (8)] are the same as the conventional device, and (9) is a transparent parallel flat glass provided in the optical path portion of the actuator cover (8).
作用は前記従来の装置とおなじであるので、その説明を
省略する。対物レンズ（３）とこの対物レンズ（３）を
矢示Ｆ及びＴ）の方向に駆動するアクチュエータ（７）
とをアクチュエータカバー（８）で包囲するから、対物
レンズ（３）やハーフミラ−（２）の表面に微塵が付着
することはなく、また、平行平板ガラス（９）の表面に
微塵が付着しても容易にクリーニングすることができる
。また、アクチュエータカバー（８）は対物レンズ（３
）と記録坦体（４）との間の光路部分に透明な平行平板
ガラスを装着しているが、対物レンズ（３）を記録坦体
（４）のカバーガラスと平行平板ガラス（９）とで発生
する収差を補正する設計にすれば、光学的になんら悪影
響を及ぼすことはない。Since the operation is the same as that of the conventional device, the explanation thereof will be omitted. Objective lens (3) and actuator (7) that drives this objective lens (3) in the directions of arrows F and T)
and is surrounded by the actuator cover (8), there is no possibility of fine dust adhering to the surface of the objective lens (3) or half mirror (2), and there is no possibility of fine dust adhering to the surface of the parallel flat glass (9). It can also be easily cleaned. In addition, the actuator cover (8) is attached to the objective lens (3).
) and the recording medium (4), a transparent parallel plate glass is attached to the optical path between the recording medium (4) and the recording medium (4). If the design is designed to correct the aberrations that occur, there will be no adverse optical effects.
以上のようにこの発明によれば、対物レンズとこの対物
レンズをｗＡｗｈするアクチュエータとを光路部分を透
明な平行平板ガラスにしたアクチュエータカバーで包囲
するから、対物レンズやハーフミラ−の表面に微塵が付
着するのを防ぎ、また、クリーニングが容易になると言
う効果がある。As described above, according to the present invention, since the objective lens and the actuator that moves the objective lens wAw are surrounded by the actuator cover whose optical path portion is made of transparent parallel flat glass, fine dust adheres to the surfaces of the objective lens and half mirror. This has the effect of preventing this from occurring and making cleaning easier.
第１図はこの発明の一実施例による光記録再生装置を示
す断面図、第２図は従来の光記録再生装置を示す断面図
である。
図において、（１）は光源、（２）はハーフミラ−２（
３）は対物レンズ、（４）は記録坦体、（５）は光検知
器、（７）はアクチュエータ、（８）はアクチュエータ
カバー（９）は平行平板ガラスである。
なお、各図中同一符号は同一または相当部分を示す。FIG. 1 is a sectional view showing an optical recording/reproducing apparatus according to an embodiment of the present invention, and FIG. 2 is a sectional view showing a conventional optical recording/reproducing apparatus. In the figure, (1) is the light source, (2) is the half mirror 2 (
3) is an objective lens, (4) is a recording medium, (5) is a photodetector, (7) is an actuator, (8) is an actuator cover, and (9) is a parallel flat glass. Note that the same reference numerals in each figure indicate the same or corresponding parts.
Claims (1)
束にしてハーフミラーを透過させ、対物レンズで収束し
て記録担体の記録面にスポットを形成させ、その反射し
た光束を前記対物レンズを経て前記ハーフミラーで前記
平行光線束から分離し収束して光検知器に入射させ、前
記記録面の情報に対応した電気信号を検出するものにお
いて、前記対物レンズと前記対物レンズを駆動するアク
チュエータとを光路部分を透明な平行平板ガラスにした
アクチュエータカバーで包囲したことを特徴とする光記
録再生装置。A light beam emitted from a light source that emits a laser beam is made into a parallel light beam and is transmitted through a half mirror, converged by an objective lens to form a spot on the recording surface of the record carrier, and the reflected light beam passes through the objective lens and passes through the half mirror. A mirror separates and converges the parallel light rays and makes them incident on a photodetector to detect an electrical signal corresponding to information on the recording surface, in which the objective lens and an actuator for driving the objective lens are arranged in an optical path part. An optical recording/reproducing device characterized in that an actuator cover is surrounded by an actuator cover made of transparent parallel flat glass.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1326255A JPH03187028A (en) | 1989-12-16 | 1989-12-16 | Optical recording and reproducing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1326255A JPH03187028A (en) | 1989-12-16 | 1989-12-16 | Optical recording and reproducing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03187028A true JPH03187028A (en) | 1991-08-15 |
Family
ID=18185729
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1326255A Pending JPH03187028A (en) | 1989-12-16 | 1989-12-16 | Optical recording and reproducing device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03187028A (en) |
-
1989
- 1989-12-16 JP JP1326255A patent/JPH03187028A/en active Pending
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