JPS6398851A - Optical disk head - Google Patents

Optical disk head

Info

Publication number
JPS6398851A
JPS6398851A JP61243404A JP24340486A JPS6398851A JP S6398851 A JPS6398851 A JP S6398851A JP 61243404 A JP61243404 A JP 61243404A JP 24340486 A JP24340486 A JP 24340486A JP S6398851 A JPS6398851 A JP S6398851A
Authority
JP
Japan
Prior art keywords
optical disk
semiconductor laser
laser
lens
light
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
Application number
JP61243404A
Other languages
Japanese (ja)
Inventor
Yasushi Matsui
松井　康
Hiromoto Serizawa
芥澤　皓元
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP61243404A priority Critical patent/JPS6398851A/en
Publication of JPS6398851A publication Critical patent/JPS6398851A/en
Pending legal-status Critical Current

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  • Optical Recording Or Reproduction (AREA)
  • Optical Head (AREA)

Abstract

PURPOSE:To realize an optical disk head with high performance by using both of two light beams radiated from a semiconductor laser for read/erasure/write of information on the optical disk face so as to improve the information processing capability. CONSTITUTION:The semiconductor laser 1 is arranged so that the rotary center axis of the optical disk 12 is located on two laser beam axes, the two beams radiated from both end faces of the semiconductor laser 1 are collimated by a collimate lens 2 and radiated onto the optical disk face 12 via a half mirror 9 and a condenser lens 11 through a convex lens 8 and the light having information is detected by a 4-split photodetector 10. Moreover, tracking and focusing functions exist, one of the two laser beams is used for read and the other is used for write/erasure to double the information processing capability.

Description

【発明の詳細な説明】 産業上の利用分野 本発明は情報処理分野における光ディスクヘッドに関す
る。DETAILED DESCRIPTION OF THE INVENTION FIELD OF INDUSTRIAL APPLICATION The present invention relates to an optical disk head in the information processing field.

従来の技術 光ディスクヘッドは半導体レーザの片方の面から出射す
る光を利用し、ディスク面上に記録された情報を読みと
るものであった。Conventional optical disk heads use light emitted from one side of a semiconductor laser to read information recorded on the disk surface.

発明が解決しようとする問題点 しかしながら半導体レーザからは、光の出射面を２固有
しており、従来の技術は、一つの面からの出射光のみを
利用し、他方は全く利用されていないため、本来の情報
処理能力は半分しか発揮されていなかった。Problems to be Solved by the Invention However, a semiconductor laser has two unique light emitting surfaces, and the conventional technology uses only the light emitted from one surface and does not utilize the other surface at all. , only half of their original information processing ability was being utilized.

問題点全解決するための手段 半導体レーザの両端面から出射される２本のビームにつ
いてそれぞれ独立したフォカシング、トラッキング、読
み出し手段を有するもので、また、半導体レーザば、光
ディスクの回転中心軸が２つのレーザービーム光軸上に
位置するように配置されている。Means for Solving All Problems The semiconductor laser has independent focusing, tracking, and readout means for the two beams emitted from both end faces of the semiconductor laser. It is arranged so as to be located on the optical axis of the laser beam.

また２本のレーザービームのうち一方を読み出しに用い
、他方を書込み・消去を行なうものでちる。Also, one of the two laser beams is used for reading, and the other is used for writing and erasing.

作　　　用 半導体レーザから発する２つの光ビームを両方共に、光
デイスク面上の情報の読出し、消去、および書き込みに
利用することにより情報処理能力全２倍とする。By using both of the two light beams emitted from the working semiconductor lasers for reading, erasing, and writing information on the optical disk surface, the total information processing capacity is doubled.

実施例 図は本発明の実施例テ示す光ディスクヘッドのトｊり成
因である。Embodiment The figure shows the causes of torque in an optical disk head according to an embodiment of the present invention.

１は半導体レーザ、２はコリメートレンズ、３はビーム
スプリッタ−５４は集光レンズ、６は光検出器、６はレ
ーザパワーフィードバック回路、７はレーザ駆動回路、
８は凹レンズ、９はハーフミラ−１１０は四分割光検出
器、１１は光デイスク面上に光を集光させるレンズ、１
２は光ディスク、１３は光デイスク全回転させるモータ
およびその制御系、そして、１４は光ピツクアップの位
置全ディスクの直径方向に移動させるための制御系を示
している。ここで８〜１１は一体化されている。1 is a semiconductor laser, 2 is a collimating lens, 3 is a beam splitter, 54 is a condensing lens, 6 is a photodetector, 6 is a laser power feedback circuit, 7 is a laser drive circuit,
8 is a concave lens, 9 is a half mirror, 110 is a four-part photodetector, 11 is a lens that focuses light on the optical disk surface, 1
Reference numeral 2 denotes an optical disk, 13 a motor and its control system for fully rotating the optical disk, and 14 a control system for moving the position of the optical pickup in the diametrical direction of the entire disk. Here, 8 to 11 are integrated.

レーザ光はコリメートレンズ２により平行光となるがそ
の一部は３〜了の系を通じてモニターされ、ＡＰＣとし
て用いられる。凹レンズ８と通過した光は、ハーフミラ
−９および集光用レンズ１１を介して光デイスク面１２
に照射される。光デイスク面１２の情報もった光は再び
レンズ１１およびハーフミラ−９を経て４分割光検出器
１０により検出される。ここで８〜１１は一体化されて
おり、また図中には示していないが当然、トラッキング
、およびフォーカシングの機能に有するものである。The laser beam is turned into parallel light by the collimating lens 2, and a part of it is monitored through the system 3 to 3 and used as APC. The light that has passed through the concave lens 8 is directed to the optical disk surface 12 via the half mirror 9 and the condensing lens 11.
is irradiated. The light carrying information on the optical disk surface 12 passes through the lens 11 and the half mirror 9 again and is detected by the four-split photodetector 10. Here, elements 8 to 11 are integrated, and although not shown in the figure, they naturally have tracking and focusing functions.

またこれらの一体化された系は、制御系１４により光デ
イスク面に平行かつ直径方向に位置制御される。Further, the position of these integrated systems is controlled by a control system 14 in parallel to the optical disk surface and in the diametrical direction.

ここで図に示すようにレーザ光は表裏両端から出射され
る２つのビーム？用いるため、読出し速度は２倍となる
。また、ビームスプリッタ３の透過率を制御することに
より、一方のビームを読出し専用に、他方全書込み消去
用として利用することも可能である。Here, as shown in the figure, is the laser light composed of two beams emitted from both the front and back ends? Therefore, the read speed is doubled. Furthermore, by controlling the transmittance of the beam splitter 3, it is also possible to use one beam for reading only and the other beam for all writing and erasing.

発明の効果 以上のように本発明によれば、半導体レーザの２本の光
ビームを使うことにより光デイスク上の情報を従来の２
倍の速度で読み出すことができ、より高性能な光ディス
クヘッドを実現することができる。また、一方のレーザ
ービーム全読出し用、他方を書き込み・消去用に用いる
ことにより従来より著しく高性能な光ディスクヘッドが
実現できる。Effects of the Invention As described above, according to the present invention, by using two light beams of a semiconductor laser, information on an optical disk can be transferred to
It is possible to read data at twice the speed, making it possible to realize a higher-performance optical disk head. Furthermore, by using one laser beam for full reading and the other for writing and erasing, an optical disk head with significantly higher performance than the conventional one can be realized.

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

図は本発明の一実施例における光ディスクヘッドの概略
構成図である。 １・・・・・・半導体レーザ、２・・・・・・コリメー
トレンズ、３・・・・ビームスプリッタ、４・・・・・
・集光レンズ、５・・・・・・光検出器（パワーモニタ
ー用）、６・・・・・・レーザパワーフィードバック回
路（ＡＰＣ）、７・・・・・・レーザ、心動回路、８・
・・・・・凹レンズ、９・・・・・・ハーフミラ−１１
０・・・・・・四分割光検出器、１１・・・・・・集光
レンズ、１２・・・・・・光ｙ’−＜スフ、１３・・・
・・モーター、１４・・・・・・光ピツクアップ位置制
御系。 （−−−す１１イトし−デ ２−−−コリ１−トしンズ ３−一〜ピー４ズブリ、り ４．１イーー−」１尼レン又゛ ５−一−に、下た出］ｋ ６−−１．−ザノぐワーフイ〜にバブク回到−（ＡＰＣ
）７−−−　ｔ−プ゛、坊主１ヨ芯 ８−−−凹しシ又゛ ９−゛ハーフＳシー １０−−−　’朗々り書］屹捜出者、 ｆ２−一一尤デ（λり ｆ３−一・モーターThe figure is a schematic configuration diagram of an optical disk head in an embodiment of the present invention. 1...Semiconductor laser, 2...Collimating lens, 3...Beam splitter, 4...
・Condenser lens, 5...Photodetector (for power monitor), 6...Laser power feedback circuit (APC), 7...Laser, cardiac circuit, 8...
... Concave lens, 9 ... Half mirror 11
0... Quadrant photodetector, 11... Condensing lens, 12... Light y'-<Suffu, 13...
...Motor, 14...Optical pickup position control system. (---S 11, 2, 1, 3, 4, 4, 1, 1, 1, 5, 1, etc.) k 6--1.- Arrive at Babuku to Zanogu Wahui- (APC
) 7--- T-pup, shaved head 1 Yo core 8--- Concave sheet 9-'Half S sea 10---'LOL book] 屹finder, f2-11 Yude( λri f3-1 motor

Claims (3)

【特許請求の範囲】[Claims] （１）１つの半導体レーザの両端面から出射される２本
のビームについて、それぞれ独立したフォーカシング、
トラッキング、読み出し手段を設けてなる光ディスクヘ
ッド。(1) Independent focusing of two beams emitted from both end faces of one semiconductor laser,
An optical disk head equipped with tracking and reading means. （２）光ディスクの回転中心軸が、２つのレーザービー
ムの光軸上に位置するように半導体レーザを配置した特
許請求の範囲第１項記載の光ディスクヘッド。(2) The optical disk head according to claim 1, wherein the semiconductor laser is arranged so that the central axis of rotation of the optical disk is located on the optical axis of the two laser beams. （３）１つの半導体レーザから出射される２本のレーザ
ービームのうち一方をディスク面上のデータを読出すの
に用い、他方をデータの書込み・消去に用いる特許請求
の範囲第１項又は第２項記載の光ディスクヘッド。(3) One of the two laser beams emitted from one semiconductor laser is used to read data on the disk surface, and the other is used to write and erase data. The optical disk head according to item 2.
JP61243404A 1986-10-14 1986-10-14 Optical disk head Pending JPS6398851A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP61243404A JPS6398851A (en) 1986-10-14 1986-10-14 Optical disk head

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP61243404A JPS6398851A (en) 1986-10-14 1986-10-14 Optical disk head

Publications (1)

Publication Number Publication Date
JPS6398851A true JPS6398851A (en) 1988-04-30

Family

ID=17103354

Family Applications (1)

Application Number Title Priority Date Filing Date
JP61243404A Pending JPS6398851A (en) 1986-10-14 1986-10-14 Optical disk head

Country Status (1)

Country Link
JP (1) JPS6398851A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003056551A3 (en) * 2001-12-24 2003-11-20 Koninkl Philips Electronics Nv Optical scanning device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003056551A3 (en) * 2001-12-24 2003-11-20 Koninkl Philips Electronics Nv Optical scanning device

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