JPS62143233A - Optical signal pickup device - Google Patents

Optical signal pickup device

Info

Publication number
JPS62143233A
JPS62143233A JP28501185A JP28501185A JPS62143233A JP S62143233 A JPS62143233 A JP S62143233A JP 28501185 A JP28501185 A JP 28501185A JP 28501185 A JP28501185 A JP 28501185A JP S62143233 A JPS62143233 A JP S62143233A
Authority
JP
Japan
Prior art keywords
diffraction grating
optical axis
signal pickup
optical signal
pickup device
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.)
Granted
Application number
JP28501185A
Other languages
Japanese (ja)
Other versions
JPH0439741B2 (en
Inventor
Toshiya Matosaki
俊哉 的崎
Yushi Matsuno
雄史 松野
Akira Hashimoto
昭 橋本
Kenjiro Kime
健治朗 木目
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP28501185A priority Critical patent/JPS62143233A/en
Publication of JPS62143233A publication Critical patent/JPS62143233A/en
Publication of JPH0439741B2 publication Critical patent/JPH0439741B2/ja
Granted legal-status Critical Current

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  • Moving Of The Head For Recording And Reproducing By Optical Means (AREA)

Abstract

PURPOSE:To facilitate the angle adjustment of a diffraction grating by forming a projection to a cylinder face of a cylindrical holder holding the diffraction grating so as to form an engaged rugged part relatively to the face of the projection orthogonal to the optical axis passing through the diffraction grating and the opposed with a screw driver in press contact with the projected face. CONSTITUTION:The cylindrical holder 3 holding the diffraction grating forms the engaged rugged part with a screw driver on the face orthogonal to the optical axis of the projection from the cylinder face. In adjusting the angle of the diffraction grating 2, a screw drive 9 is inserted to the disc face from the vertical direction and an eccentric pin 11 provided to the tip of the screw driver as the projection is engaged with a slot 13. In turning the screw driver 9, the cylindrical holder 3 is turned around the optical axis by the operation of the eccentric pin 11 to adjust the minute angle of the diffraction grating 2 thereby bringing the sensitivity of the tracking control into the best state.

Description

【発明の詳細な説明】 [産業上の利用分野] この発明は光学式信号ピックアップ装置、特に、光スポ
ットとディスク上のトラックの位置関係を最適位回関係
に調整するのに好適な光学式信号ピックアップ装置に関
するものである。
[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an optical signal pickup device, and particularly to an optical signal pickup device suitable for adjusting the positional relationship between a light spot and a track on a disk to an optimal positional relationship. This invention relates to a pickup device.

[従来の技術] 第3図は、従来の光学式信号ピックアップ装置を示ず斜
視図であり、図において、(1)(ユ光源としての半導
体レーザー、(2)は回折格子で、この回折格子(2〉
は回転可能な円筒状ホルダ(3)に固定されている。(
4)はハーフプリズム、(5)は対物レンズ、(6)は
ディスク、(7)は拡昨レンズ、(8)は光検知器て必
る。
[Prior Art] Fig. 3 is a perspective view (not showing) of a conventional optical signal pickup device. In the figure, (1) (a semiconductor laser as a light source), (2) a diffraction grating, (2>
is fixed to a rotatable cylindrical holder (3). (
4) is a half prism, (5) is an objective lens, (6) is a disk, (7) is a magnifying lens, and (8) is a photodetector.

つぎに動作について説明する。半導体レーザー(1)か
ら出射した光は、回折格子(2)に入射後、復シλの回
折光に分割され、その内直進光と、±1次光の3つの回
折光を利用する。3つの回折光はハーフプリズム(4)
を透過し、対物レンズ(5)によりディスク(6)上に
集光され、ディスク(6)面上に反q寸した後、ハーフ
プリズム〈4)で方向を変え、拡Lレンズ(7〉を経て
光倹χ日器(8)に集光される。
Next, the operation will be explained. After the light emitted from the semiconductor laser (1) enters the diffraction grating (2), it is split into multiple diffracted lights of λ, of which three diffracted lights, the straight forward light and the ±1st-order light, are used. The three diffracted lights are half prisms (4)
The light passes through the lens, is focused on the disk (6) by the objective lens (5), and is reflected on the surface of the disk (6) by a diagonal of q. The direction is changed by the half prism (4), and the magnifying L lens (7) is used. After that, the light is focused on the light saving device (8).

上記3つの回折光は第4図に示すJ、うに、ディスク(
6)上ではヒツト列B1に対し角度を持って集光され、
その反GJ光の回折0次光は、第5図に示7ように光検
知器(8)の受光素子81〜B4に入射し、回折±1次
光は同図受光素子A1、A2に入q」づる。
The above three diffracted lights are J, Uni, and Disk (shown in Figure 4).
6) Above, the light is focused at an angle to the hit row B1,
The 0th order diffracted light of the anti-GJ light enters the light receiving elements 81 to B4 of the photodetector (8) as shown in FIG. 5, and the ±1st order diffracted light enters the light receiving elements A1 and A2 in the figure. Q'zuru.

回折0次光はディジタル情報信号及びフォーカシング誤
差信号として使われ、±1次光は受光素子A1、A2か
らの光電流IAI、IA2からの差信号(IAl−IA
2)がトラッキング誤差信号となり、これか零となるよ
うに光学系を調整してトラッキング制御を行う。
The 0th-order diffracted light is used as a digital information signal and a focusing error signal, and the ±1st-order light is used as a difference signal (IAl-IA
2) becomes a tracking error signal, and tracking control is performed by adjusting the optical system so that this becomes zero.

ディスク(6)上の回折光のビット列に対する角1αを
Iυ適角Lしと刀ることにより、トラッキング制御の(
へ葭か良好となる。このため、回折格子(2)を図の俤
に回転可能な円筒状ホルタ買3)に固定し、この円筒状
ホルダ(3)の円筒面に光軸と平行に形成された!4’
i (10)に、トライバ(9)の先端に設けた(偏心
ピン(11)を係合させ、ドライバ(9)の回転により
円筒状ホルダ(3)を回動させて微少角度調整を行い、
トラッキング制御の感度を最良状態ににする。
Tracking control (
The shade will be good. For this purpose, the diffraction grating (2) was fixed to a rotatable cylindrical holder (3) as shown in the figure, and a grating was formed on the cylindrical surface of this cylindrical holder (3) parallel to the optical axis. 4'
i (10) is engaged with the eccentric pin (11) provided at the tip of the driver (9), and the cylindrical holder (3) is rotated by the rotation of the driver (9) to perform minute angle adjustments.
Optimize tracking control sensitivity.

[発明か解決しようとする問題点] 従来の光学式信号ピックアップ装置は以上のように怖成
されているので、円筒状ホルダ(3)の溝(10)に対
するドライバ(9)の偏心ピン(11)の挿入方向は、
ディスク(6)の面に平行な方向となり、光学式信号ピ
ックアップ装置をプレーヤーシャーシに絹み込んだ後の
回折格子の角度調整が回動あるいは不可能であるなどの
問題点があった。
[Problems to be Solved by the Invention] Since the conventional optical signal pickup device is constructed as described above, the eccentric pin (11) of the driver (9) relative to the groove (10) of the cylindrical holder (3) ) is inserted in the direction of
The direction is parallel to the surface of the disc (6), and there are problems in that the angle of the diffraction grating cannot be rotated or adjusted after the optical signal pickup device is installed in the player chassis.

この発明は上記のような問題点を解消するためになされ
たもので、プレーヤーシャーシに組み込まれた後であっ
ても回折格子の角度調整を容易にすることができる光学
式機信号ピックアップ装置を1り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 machine signal pickup device that can easily adjust the angle of the diffraction grating even after being incorporated into the player chassis. The purpose is to

[問題点を解決するための手段1 この発明に係る光学式信号ピックアップ装置は回折帽子
を保持する円筒状ホルダの円筒面に突出部を形成し、回
折格子を員く光軸と直交する前記突出部の面と法面に当
接するドライバとの対向面に相対的に係合凹凸部を形成
したものである。
[Means for Solving the Problems 1] The optical signal pickup device according to the present invention has a protrusion formed on the cylindrical surface of a cylindrical holder that holds a diffraction cap, and the protrusion perpendicular to the optical axis that includes the diffraction grating. Engaging uneven portions are formed relative to the face of the driver and the face facing the driver that comes into contact with the slope.

[実施1列1 この発明に45ける回折格子を保持覆る円筒状ホルダは
、その円筒面からの突出部の光1111と直交する面に
ドライバとの係合凹凸部を形成したことにより、光学式
信号ピックアップ装置をプレーヤーシャーシに組み込ん
だ後でもディスク面と直交するブレーA2下方からドラ
イバが上記突出部1こ係脱され、容易に回折帽子の角度
調整を可能とする。
[Embodiment 1 Row 1 The cylindrical holder that holds and covers the diffraction grating in 45 of the present invention has an uneven portion for engaging with the driver on the surface perpendicular to the light 1111 of the protruding portion from the cylindrical surface, so that the optical Even after the signal pickup device is assembled into the player chassis, the driver can be engaged with and disengaged from the projection 1 from below the brake A2 perpendicular to the disc surface, making it possible to easily adjust the angle of the diffraction cap.

[発明の実施例1 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、前記第3図と同一部分には同一符号を付し
である。(12〉は円筒状ホルダ(3)の円筒面に形成
した突出部、(13)は回折格子を崩く光軸と直交する
前記突出部の面に該光軸を中心とする放射方向に形成し
た四部としCの溝で必る。
[Embodiment 1 of the Invention Hereinafter, an embodiment of the present invention will be described with reference to the drawings. 1st
In the figure, the same parts as in FIG. 3 are given the same reference numerals. (12> is a protrusion formed on the cylindrical surface of the cylindrical holder (3), and (13) is formed on the surface of the protrusion perpendicular to the optical axis that breaks the diffraction grating in the radial direction centered on the optical axis. The four parts are made in the groove C.

ディスク(6)に光スポットを集光し該ディスクからの
反則光を光検知器(8)に集光させることは前記第3図
の従来装置と同一でおる。
The method of converging a light spot on the disk (6) and converging the repulsed light from the disk on the photodetector (8) is the same as in the conventional apparatus shown in FIG.

回折格子(2)の角度調整は、ディスク面に対し垂直方
向からドライバ(9)を挿入して該ドライバ先端に設け
られた凸部としての偏心ピン(11)を満(13)に係
合させる。そして、ドライバ(9)を回転させると、偏
心ピンく11)の作用で円筒状ホルダ(3)は光軸を中
心に回動し、回折格子(2〉の微少角度調整を行いトラ
ッキング制御の感度を最良状態とする。
To adjust the angle of the diffraction grating (2), insert the driver (9) from a direction perpendicular to the disk surface and fully engage the eccentric pin (11) as a convex portion provided at the tip of the driver (13). . Then, when the driver (9) is rotated, the cylindrical holder (3) is rotated around the optical axis by the action of the eccentric pin 11), and the fine angle adjustment of the diffraction grating (2) is carried out to control the sensitivity of the tracking control. is the best condition.

第2図はこの発明の他の実施例を示すもので、突出部(
12)の光軸を直交する面にピン(14)を突設し、ド
ライバ(9)に上記ピン(14)と係合7る回心溝(1
5>@82けたもので。上記実施例と同作の効果を奏す
る。
FIG. 2 shows another embodiment of the invention, in which the protrusion (
A pin (14) is provided protruding from a surface perpendicular to the optical axis of the driver (9), and a pivoting groove (1) is provided on the driver (9) to engage with the pin (14).
5>@82 digits. The same effect as the above embodiment is achieved.

[発明の効果1 以上のように、この発明(こよれば、回折、名子を固定
づる円筒状ホルタの円筒面に突出部を設け、回折格子を
員く光軸ど両受づる上記突出部の面と法面に当接するト
ライバとの対向面に相λ・j的に係合凹凸部を設けたの
で、回転角度調整用のドライバをディスク面と直交する
光軸方向から先学式信号ピックアップ装置に挿入でき、
プレーヤシャーシに光信号ピックアップ装置を組み込ん
だ後も、プレーV−下りから容易に回折格子の角度調整
をすることができる効果がある。
[Effect of the invention 1 As described above, the present invention (according to this invention) provides a protrusion on the cylindrical surface of a cylindrical holster for fixing a diffraction grating, and the protrusion receives both the optical axis of the diffraction grating. Engaging uneven portions are provided on the opposing surface of the drive bar that contacts the slope and the surface of the drive bar, so that the driver for adjusting the rotation angle can be mounted from the direction of the optical axis perpendicular to the disk surface. can be inserted into the device,
Even after the optical signal pickup device is installed in the player chassis, the angle of the diffraction grating can be easily adjusted from the bottom of the player V.

【図面の簡単な説明】[Brief explanation of drawings]

第1図はこの発明の一実施例による光学式信号ピックア
ップ装置を示す斜視図、第2図はこの発明の他の実施例
による光学式信号ピックアップ装置を示す斜視図、第3
図は従来の光学式信号ピックアップ装置の斜視図、第4
図は光ピツクアップの3ビ一ムトラツキング制御方式の
原理図、第5図は光検知器の正面図である。 (1)は光源(半導(本レーザー)、(2) G;1.
回折(6子、(3)は円筒状ホルタ、(4)はハーフブ
1ノス゛ム、(5) f1対物レンズ、(6)1よディ
スク、(8)(は光)愈知器、(0)はドライバ、(1
1)は偏心ビン、(12)は突出部、(13)は四部(
iI!l11)、(14)はビン、(11う)は四部(
回心溝)、。 なお、図中、同一符号は同一、又)は相当部分を示す。 代理人 弁理士 人 ン−増 雄 (タト   2 名 ) 第1図 第2図 第3図 第4図 第5図 手続補正書く自発)
FIG. 1 is a perspective view showing an optical signal pickup device according to one embodiment of the invention, FIG. 2 is a perspective view showing an optical signal pickup device according to another embodiment of the invention, and FIG.
The figure is a perspective view of a conventional optical signal pickup device.
The figure shows the principle of the three-beam tracking control system for optical pickup, and FIG. 5 is a front view of the photodetector. (1) is a light source (semiconductor (this laser); (2) G; 1.
Diffraction (6 elements, (3) is a cylindrical Holter, (4) is a half beam nozzle, (5) f1 objective lens, (6) 1 is a disk, (8) is an optical detector, (0) is Driver, (1
1) is an eccentric bottle, (12) is a protruding part, and (13) is a four part (
iI! l11), (14) are bottles, (11u) are four parts (
conversion groove),. In addition, in the figures, the same reference numerals and ) indicate corresponding parts. Agent Patent attorney Masuo N-Masu (2 people) Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Voluntary writing of procedural amendments)

Claims (3)

【特許請求の範囲】[Claims] (1)光源からの出射光を複数の回折光に分割する回折
格子と、この回折格子を固定した回転可能な円筒状ホル
ダと、前記回折光をディスク上に集光する対物レンズと
、前記ディスク上からの反射光を光検知器に集光するハ
ーフプリズムとを有する光学式信号ピックアップ装置に
おいて、前記円筒状ホルダの円筒面に突出部を形成し、
前記回折格子を貫く光軸と直行する前記突出部の面と該
面に当接するドライバとの対向面に相対的に係合凹凸部
を形成したことを特徴とする光学式信号ピックアップ装
置。
(1) A diffraction grating that divides the light emitted from the light source into a plurality of diffracted lights, a rotatable cylindrical holder to which the diffraction grating is fixed, an objective lens that focuses the diffracted light onto a disk, and the disc In an optical signal pickup device having a half prism that focuses reflected light from above onto a photodetector, a protrusion is formed on the cylindrical surface of the cylindrical holder,
An optical signal pickup device characterized in that an engagement uneven portion is formed relative to a surface of the protrusion that is perpendicular to the optical axis passing through the diffraction grating and a surface facing the driver that comes into contact with the surface.
(2)回折格子を貫く光軸と直交する突出部の面に該光
軸を中心として放射方向にドライバ先端の凸部が係合す
る凹部を形成したことを特徴とする特許請求の範囲第(
1)項記載の光学式信号ピックアップ装置。
(2) A concave portion is formed in the surface of the protruding portion orthogonal to the optical axis passing through the diffraction grating, with which the convex portion of the driver tip engages in the radial direction with the optical axis as the center.
The optical signal pickup device according to item 1).
(3)回折格子を貫く光軸と直交する突出部の面にドラ
イバ先端の凹部が係合する凸部を形成したことを特徴と
する特許請求の範囲第(1)項記載の光学式信号ピック
アップ装置。
(3) An optical signal pickup according to claim (1), characterized in that a convex portion that engages with a concave portion at the tip of the driver is formed on the surface of the protruding portion perpendicular to the optical axis passing through the diffraction grating. Device.
JP28501185A 1985-12-18 1985-12-18 Optical signal pickup device Granted JPS62143233A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP28501185A JPS62143233A (en) 1985-12-18 1985-12-18 Optical signal pickup device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP28501185A JPS62143233A (en) 1985-12-18 1985-12-18 Optical signal pickup device

Publications (2)

Publication Number Publication Date
JPS62143233A true JPS62143233A (en) 1987-06-26
JPH0439741B2 JPH0439741B2 (en) 1992-06-30

Family

ID=17685992

Family Applications (1)

Application Number Title Priority Date Filing Date
JP28501185A Granted JPS62143233A (en) 1985-12-18 1985-12-18 Optical signal pickup device

Country Status (1)

Country Link
JP (1) JPS62143233A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6445314U (en) * 1987-09-10 1989-03-20

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6445314U (en) * 1987-09-10 1989-03-20

Also Published As

Publication number Publication date
JPH0439741B2 (en) 1992-06-30

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