JPS61187020U - - Google Patents
Info
- Publication number
- JPS61187020U JPS61187020U JP7033785U JP7033785U JPS61187020U JP S61187020 U JPS61187020 U JP S61187020U JP 7033785 U JP7033785 U JP 7033785U JP 7033785 U JP7033785 U JP 7033785U JP S61187020 U JPS61187020 U JP S61187020U
- Authority
- JP
- Japan
- Prior art keywords
- light
- generating
- signal
- recording medium
- error signal
- 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
- 238000001514 detection method Methods 0.000 claims description 6
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 claims 2
- 230000003287 optical effect Effects 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 5
- 230000003321 amplification Effects 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
Landscapes
- Optical Recording Or Reproduction (AREA)
Description
第１図は本考案をフオーカス制御装置に応用し
た場合の回路図、第２図はその特性図、第３図は
従来のフオーカス制御装置の原理図、第４図はそ
の光検出手段上の光の形状を表わす平面図、第５
図はその特性図、第６図はその回路図である。
１……光源、２……ビームスプリツタ、３……
対物レンズ、４……デイスク、５……円柱レンズ
、６……光検知手段、９，１２，４１……加算回
路、１５……差動増幅器、３１，３２……比較器
、４２……反転増幅回路。
Fig. 1 is a circuit diagram when the present invention is applied to a focus control device, Fig. 2 is its characteristic diagram, Fig. 3 is a principle diagram of a conventional focus control device, and Fig. 4 shows the light on the light detection means. 5th plan view showing the shape of
The figure is its characteristic diagram, and FIG. 6 is its circuit diagram. 1...Light source, 2...Beam splitter, 3...
Objective lens, 4... Disk, 5... Cylindrical lens, 6... Light detection means, 9, 12, 41... Addition circuit, 15... Differential amplifier, 31, 32... Comparator, 42... Inversion Amplification circuit.
Claims (1)
源より該記録媒体に照射され、該記録媒体にて反
射された反射光を検知する光検知手段と、該光検
知手段が出力する出力信号から誤差信号を生成す
る誤差信号生成手段と、該誤差信号に対応して該
光の該記録媒体に対する相対的位置を制御する位
置制御手段とを有する光学式情報記録再生装置に
おいて、 該誤差信号生成手段から出力される該誤差信号
のレベルを基準信号のレベルと比較する比較手段
と、該光検知手段が出力する該出力信号から該反
射光の光量を検知し、該反射光量に対応した検知
信号を生成する検知信号生成手段と、該検知信号
に対応して該基準信号を生成する基準信号生成手
段とを有することを特徴とする光学式情報記録再
生装置。[Claims for Utility Model Registration] A light source that generates light that irradiates a recording medium, a light detection means that detects reflected light that is irradiated onto the recording medium from the light source and reflected by the recording medium, and the light An optical information recording/reproducing device comprising: an error signal generating means for generating an error signal from an output signal output by the detecting means; and a position controlling means for controlling the relative position of the light with respect to the recording medium in response to the error signal. In the apparatus, a comparing means compares the level of the error signal outputted from the error signal generating means with the level of a reference signal, and a comparing means detects the amount of the reflected light from the output signal outputted by the light detecting means, An optical information recording/reproducing apparatus comprising: a detection signal generation means for generating a detection signal corresponding to the amount of reflected light; and a reference signal generation means for generating the reference signal in response to the detection signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7033785U JPS61187020U (en) | 1985-05-13 | 1985-05-13 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7033785U JPS61187020U (en) | 1985-05-13 | 1985-05-13 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61187020U true JPS61187020U (en) | 1986-11-21 |
Family
ID=30606828
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7033785U Pending JPS61187020U (en) | 1985-05-13 | 1985-05-13 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61187020U (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58125241A (en) * | 1982-01-20 | 1983-07-26 | Matsushita Electric Ind Co Ltd | Optical recording and reproducing device |
| JPS5952313A (en) * | 1982-09-17 | 1984-03-26 | Nippon Columbia Co Ltd | Servo device |
| JPS5965946A (en) * | 1982-10-06 | 1984-04-14 | Hitachi Ltd | Video disk player |
-
1985
- 1985-05-13 JP JP7033785U patent/JPS61187020U/ja active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58125241A (en) * | 1982-01-20 | 1983-07-26 | Matsushita Electric Ind Co Ltd | Optical recording and reproducing device |
| JPS5952313A (en) * | 1982-09-17 | 1984-03-26 | Nippon Columbia Co Ltd | Servo device |
| JPS5965946A (en) * | 1982-10-06 | 1984-04-14 | Hitachi Ltd | Video disk player |
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