JPS6168321U - - Google Patents
Info
- Publication number
- JPS6168321U JPS6168321U JP15138584U JP15138584U JPS6168321U JP S6168321 U JPS6168321 U JP S6168321U JP 15138584 U JP15138584 U JP 15138584U JP 15138584 U JP15138584 U JP 15138584U JP S6168321 U JPS6168321 U JP S6168321U
- Authority
- JP
- Japan
- Prior art keywords
- recording medium
- focus
- controlling
- servo means
- focus servo
- 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
- 230000003287 optical effect Effects 0.000 claims 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
Landscapes
- Optical Recording Or Reproduction (AREA)
Description
図は本考案の一実施例を示したブロツク図であ
る。
１…記録媒体、３…光源、７…対物レンズ、８
…アクチユエータ、９１，９２…光電変換素子、
１２，１５…差動増幅器、１３…スイツチ、１４
…制御回路、Ｖ…オフセツト電圧。
The figure is a block diagram showing one embodiment of the present invention. 1...Recording medium, 3...Light source, 7...Objective lens, 8
...actuator, 9 1 , 9 2 ... photoelectric conversion element,
12, 15...Differential amplifier, 13...Switch, 14
...Control circuit, V...Offset voltage.
Claims (1)
ーカスエラー信号にもとづいて記録媒体と対物レ
ンズとの相対距離を制御するフオーカスサーボ手
段と、 記録時には前記焦点が前記記録媒体上に位置し
、また消去時には前記焦点が前記記録媒体上から
外れた位置に位置するよう前記フオーカスサーボ
手段を制御する制御手段とを備える光学的記録再
生装置。[Claims for Utility Model Registration] Focus servo means for controlling the relative distance between the recording medium and the objective lens based on a focus error signal so that the focus of the light beam is located at a predetermined position; an optical recording/reproducing apparatus comprising: a control means located on the recording medium and controlling the focus servo means so that the focal point is located at a position off the recording medium during erasing;
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15138584U JPS6168321U (en) | 1984-10-06 | 1984-10-06 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15138584U JPS6168321U (en) | 1984-10-06 | 1984-10-06 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6168321U true JPS6168321U (en) | 1986-05-10 |
Family
ID=30709499
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15138584U Pending JPS6168321U (en) | 1984-10-06 | 1984-10-06 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6168321U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02186312A (en) * | 1989-01-13 | 1990-07-20 | Topcon Corp | Automatic focusing and illuminating device |
-
1984
- 1984-10-06 JP JP15138584U patent/JPS6168321U/ja active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02186312A (en) * | 1989-01-13 | 1990-07-20 | Topcon Corp | Automatic focusing and illuminating device |
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