JPS60142832U - Optical pick-up device - Google Patents

Optical pick-up device

Info

Publication number
JPS60142832U
JPS60142832U JP3050084U JP3050084U JPS60142832U JP S60142832 U JPS60142832 U JP S60142832U JP 3050084 U JP3050084 U JP 3050084U JP 3050084 U JP3050084 U JP 3050084U JP S60142832 U JPS60142832 U JP S60142832U
Authority
JP
Japan
Prior art keywords
optical pickup
correction
semiconductor laser
pickup device
monitor circuit
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
JP3050084U
Other languages
Japanese (ja)
Other versions
JPH0728587Y2 (en
Inventor
省二 吉川
竹村　治彦
啓成 児玉
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.)
Olympus Corp
Original Assignee
Olympus Optical 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 Olympus Optical Co Ltd filed Critical Olympus Optical Co Ltd
Priority to JP1984030500U priority Critical patent/JPH0728587Y2/en
Publication of JPS60142832U publication Critical patent/JPS60142832U/en
Application granted granted Critical
Publication of JPH0728587Y2 publication Critical patent/JPH0728587Y2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

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

第１図および第２図は半導体レーザの種々の特性バラツ
キを示す説明図、第３ａ〜３ｄ図は半導体レーザの光射
光量に対するモニター電流のバラツキを補正する場合の
例を示す構成説明図、第４ａ図および第４ｂ図は半導体
レーザのしきい値電流のバラツキを補正する場合の例を
孝子構成説明図、第５ａ図および第５ｂ図は半導体レー
ザの量子効率のバラツキを補正する場合の例を示す構成
説明図、第６図に本考案光学式ピックアップ装置の構成
を示す斜視図、第７図は同じくその他の例を示す斜視図
である。 １・・・・・・光ピツクアップ、２・曲・半導体レーザ
、３・・・・・・中継基板、４・・・・・・補正基板、
５・・曲中継コード、ＬＤ・・・・・・レーザダイオー
ド、ＰＩＮＤ・・・・・−ＰＩＮダイオード、Ｒ９ＲＡ
・・・・・・抵抗、ＲＯＭ・・曲読取り専用メモリ、Ｐ
ＥＣ・・・・・・光電変換回路、Ｄ／Ａ・・・・・・デ
ィジタル−アナログ変換器、ＤＳ・・曲寿命判定装置、
ＩＳ・・・・・・電流源。 （ａ）− ドー 、　　　−ｖ （ｂ） Ｅｃ （ｄ） （Ｕノ ヨ 第６図 ／、　　　− ］ 査 （ｂ） １　−′″ 第７図−1 and 2 are explanatory diagrams showing various characteristic variations of semiconductor lasers; FIGS. 3a to 3d are configuration explanatory diagrams illustrating an example of correcting variations in monitor current with respect to the amount of light emitted from a semiconductor laser; Figures 4a and 4b are explanatory diagrams of Takako's configuration for an example of correcting variations in the threshold current of a semiconductor laser, and Figures 5a and 5b are diagrams showing an example of correcting variations in the quantum efficiency of a semiconductor laser. FIG. 6 is a perspective view showing the structure of the optical pickup device of the present invention, and FIG. 7 is a perspective view showing another example. 1... Optical pickup, 2... Tuning/semiconductor laser, 3... Relay board, 4... Correction board,
5... Song relay code, LD... Laser diode, PIND...-PIN diode, R9RA
...Resistance, ROM...memory for reading songs, P
EC...Photoelectric conversion circuit, D/A...Digital-to-analog converter, DS...Song life determination device,
IS... Current source. (a) - Do, -v (b) Ec (d) (Unoyo Figure 6/, - ] Examination (b) 1 -'' Figure 7-

Claims (1)

【実用新案登録請求の範囲】 １　半導体レーザを光源として用いる光学式記録再生装
置用の光ピツクアップにおいて、半導体レーザ個々の特
性バラツキを補正する補正要素を補正基板に組込み、該
補正基板を光ピツクアップにほぼ一体化して設けたこと
を特徴とする光学式ピックアップ装置。 ２　補正要素を、半導体レーザの出射光量に対するモニ
ター回路のモニター電流のバラツキを補正するためのモ
ニター回路の利得調整要素としたことを特徴とする実用
新案登録請求の範囲第１項記載の光学式ピックアップ装
置。 ３　補正要素を、半導体レーザの出射光量に対して正規
化した出力を得るモニター回路としたことを特徴とする
実用新案登録請求の範囲第１項記載の光学式ピックアッ
プ装置。 ４　補正要素を、半導体レーザのしきい値電流の初期値
に換算可能な要素としたことを特徴とする実用新案登録
請求の範囲第１項記載の光学式ピックアップ装置。　　
　　　　　　 ５　補正要素を、半導体レーザの量子効率（ΔＰ／ΔＩ
）のバラツキを補正し得る要素としたことを特徴とする
実用新案登録請求の範囲第１項記載の光学式ピックアッ
プ装置。 ６　複数の補正要素の全部を１個の補正基板に組込むよ
うにしたことを特徴とする実用新案登録請求の範囲第１
項記載の光学式ピックアップ装置。[Claims for Utility Model Registration] 1. In an optical pickup for an optical recording/reproducing device that uses a semiconductor laser as a light source, a correction element for correcting characteristic variations of individual semiconductor lasers is incorporated into a correction substrate, and the correction substrate is used in the optical pickup. An optical pickup device characterized by being provided almost integrally. 2. The optical pickup according to claim 1, wherein the correction element is a gain adjustment element of a monitor circuit for correcting variations in the monitor current of the monitor circuit with respect to the amount of light emitted from the semiconductor laser. Device. 3. The optical pickup device according to claim 1, wherein the correction element is a monitor circuit that obtains an output normalized with respect to the amount of light emitted from the semiconductor laser. 4. The optical pickup device according to claim 1, wherein the correction element is an element that can be converted into the initial value of the threshold current of the semiconductor laser.
5 The correction factor is the quantum efficiency of the semiconductor laser (ΔP/ΔI
2. The optical pickup device according to claim 1, characterized in that the optical pickup device has an element capable of correcting variations in values. 6 Utility model registration claim 1 characterized in that all of the plurality of correction elements are incorporated into one correction board
The optical pickup device described in Section 1.
JP1984030500U 1984-03-02 1984-03-02 Optical pickup device Expired - Lifetime JPH0728587Y2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1984030500U JPH0728587Y2 (en) 1984-03-02 1984-03-02 Optical pickup device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1984030500U JPH0728587Y2 (en) 1984-03-02 1984-03-02 Optical pickup device

Publications (2)

Publication Number Publication Date
JPS60142832U true JPS60142832U (en) 1985-09-21
JPH0728587Y2 JPH0728587Y2 (en) 1995-06-28

Family

ID=30530251

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1984030500U Expired - Lifetime JPH0728587Y2 (en) 1984-03-02 1984-03-02 Optical pickup device

Country Status (1)

Country Link
JP (1) JPH0728587Y2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6269829U (en) * 1985-10-19 1987-05-01

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52123185A (en) * 1976-04-09 1977-10-17 Fujitsu Ltd Optical communication supervisory system
JPS5821886A (en) * 1981-07-31 1983-02-08 Nec Corp Discriminating circuit to judge deterioration of laser diode
JPS58133643A (en) * 1982-02-03 1983-08-09 Pioneer Electronic Corp Optical disc player
JPS5936035U (en) * 1982-08-30 1984-03-06 ソニー株式会社 optical pick up

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52123185A (en) * 1976-04-09 1977-10-17 Fujitsu Ltd Optical communication supervisory system
JPS5821886A (en) * 1981-07-31 1983-02-08 Nec Corp Discriminating circuit to judge deterioration of laser diode
JPS58133643A (en) * 1982-02-03 1983-08-09 Pioneer Electronic Corp Optical disc player
JPS5936035U (en) * 1982-08-30 1984-03-06 ソニー株式会社 optical pick up

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6269829U (en) * 1985-10-19 1987-05-01

Also Published As

Publication number Publication date
JPH0728587Y2 (en) 1995-06-28

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