JPS62150733U - - Google Patents
Info
- Publication number
- JPS62150733U JPS62150733U JP3876686U JP3876686U JPS62150733U JP S62150733 U JPS62150733 U JP S62150733U JP 3876686 U JP3876686 U JP 3876686U JP 3876686 U JP3876686 U JP 3876686U JP S62150733 U JPS62150733 U JP S62150733U
- Authority
- JP
- Japan
- Prior art keywords
- high frequency
- direct current
- semiconductor laser
- superimposing
- current
- 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
- 239000004065 semiconductor Substances 0.000 claims 3
- 230000003287 optical effect Effects 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Optical Head (AREA)
Description
第１図は高周波重畳回路例、第２図は高周波重
畳時の動作図、第３図は本考案の回路例、第４図
は第３図の動作説明図、第５図及び第６図は直結
型高周波重畳回路例をそれぞれ示している。
１……レーザダイオード、３……基準電源、４
……誤差増分器、５……サンプルホールド回路、
８……スイツチ手段、１１……高周波発振器、１
２……電流源Ｉ１、１３……電流源Ｉ２。
Fig. 1 is an example of a high frequency superimposition circuit, Fig. 2 is an operation diagram during high frequency superimposition, Fig. 3 is an example of the circuit of the present invention, Fig. 4 is an explanatory diagram of the operation of Fig. 3, and Figs. 5 and 6 are Examples of direct-coupled high-frequency superimposition circuits are shown. 1... Laser diode, 3... Reference power supply, 4
...Error incrementer, 5...Sample and hold circuit,
8... Switch means, 11... High frequency oscillator, 1
2... Current source I 1 , 13... Current source I 2 .
Claims (1)
再生又は、消去を行う光ヘツド装置において、前
記半導体レーザ素子を駆動する直流駆動手段と、
情報信号の最高周波数の２倍以上の高周波電流を
重畳する手段を有し、前記高周波重畳手段は、前
記直流駆動手段に対して、直流的に加算又は減算
することを特徴とする装置。 (2) 前記高周波重畳手段は、記録時にオフとな
り、高周波重畳手段の電流を補償する直流電流が
記録時に印加されることを特徴とする実用新案登
録請求の範囲第１項記載の装置。 (3) 前記半導体レーザの温度による片特性の変
動分を補償する手段を持つことを特徴とする装置
。[Claims for Utility Model Registration] (1) In an optical head device that uses a semiconductor laser to perform recording, reproduction, or erasing on an optical recording medium, a direct current driving means for driving the semiconductor laser element;
An apparatus comprising means for superimposing a high frequency current of twice or more the highest frequency of an information signal, wherein the high frequency superimposing means adds or subtracts direct current to or from the direct current driving means. (2) The apparatus according to claim 1, wherein the high frequency superimposing means is turned off during recording, and a direct current that compensates for the current of the high frequency superimposing means is applied during recording. (3) A device characterized by having means for compensating for variations in one-sided characteristics due to temperature of the semiconductor laser.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3876686U JPS62150733U (en) | 1986-03-17 | 1986-03-17 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3876686U JPS62150733U (en) | 1986-03-17 | 1986-03-17 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62150733U true JPS62150733U (en) | 1987-09-24 |
Family
ID=30851317
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3876686U Pending JPS62150733U (en) | 1986-03-17 | 1986-03-17 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62150733U (en) |
-
1986
- 1986-03-17 JP JP3876686U patent/JPS62150733U/ja active Pending
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