JPS5953535U - optical head - Google Patents
optical headInfo
- Publication number
- JPS5953535U JPS5953535U JP14880282U JP14880282U JPS5953535U JP S5953535 U JPS5953535 U JP S5953535U JP 14880282 U JP14880282 U JP 14880282U JP 14880282 U JP14880282 U JP 14880282U JP S5953535 U JPS5953535 U JP S5953535U
- Authority
- JP
- Japan
- Prior art keywords
- objective lens
- light beam
- moving
- disk medium
- focused 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
Links
Landscapes
- Optical Recording Or Reproduction (AREA)
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) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
第１図は従来の光学ヘッドの概要図、第２図および第３
図は本考案に係る光学ヘッドの実施例を示すもので、第
２図は光学ヘッドの概要図、第３図は移動手段駆動回路
図である。
図中、１はレーザダイオード、２はレンズ、３は偏光ビ
ームスプリッタ、４はλ／２板、５はミラ、６は対物レ
ンズ、８は２分割差動光検知器、２１は対物レンズトラ
ッキング用アクチュエータ、２３は２分割差動光検知器
駆動用アクチュエータ（移動手段）である。
、−裕
儒・
Ｄ、 Ｄ２
第２図 １０１１
１ノ
１２ ／Ｓ”ＩＩFigure 1 is a schematic diagram of a conventional optical head, Figures 2 and 3 are
The figures show an embodiment of the optical head according to the present invention, FIG. 2 is a schematic diagram of the optical head, and FIG. 3 is a diagram of a moving means drive circuit. In the figure, 1 is a laser diode, 2 is a lens, 3 is a polarizing beam splitter, 4 is a λ/2 plate, 5 is a mirror, 6 is an objective lens, 8 is a two-split differential photodetector, and 21 is for objective lens tracking. The actuator 23 is an actuator (moving means) for driving the two-split differential photodetector. , -Yuju・D, D2 Figure 2 1011 1 no 12 /S”II
Claims (1)
させる対物レンズと、該ディスク媒体に円心状またはら
せん状に設けられた情報トラックの半径方向の微小移動
を集束光ビームの反射光により検出する２分割差動光検
知器とを有し、該２分割差動光検知器の検出信号により
前記対物レンズを横移動させて集束光ビームを情報トラ
ックに追尾させて情報の記録、再生を行う光学ヘッドに
゛おいて、前記対物レンズの移動距離と同じ距離だけ前
記２分割差動光検知器を集束光ビーム中心の移動方向に
前記対物レンズの移動と同期して移動させる移動手段を
設けたことを特徴とする光学へラド。An objective lens that faces a disk medium and focuses a light beam on the disk medium, and a minute movement in the radial direction of an information track provided in a circular or spiral shape on the disk medium is detected by reflected light of the focused light beam. and a two-segment differential photodetector, the objective lens is moved laterally according to the detection signal of the two-segment differential photodetector to track a focused light beam to an information track, thereby recording and reproducing information. The head is provided with a moving means for moving the two-split differential photodetector by the same distance as the moving distance of the objective lens in the moving direction of the center of the focused light beam in synchronization with the movement of the objective lens. Optical Herad featuring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14880282U JPS5953535U (en) | 1982-09-30 | 1982-09-30 | optical head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14880282U JPS5953535U (en) | 1982-09-30 | 1982-09-30 | optical head |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5953535U true JPS5953535U (en) | 1984-04-07 |
Family
ID=30330492
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14880282U Pending JPS5953535U (en) | 1982-09-30 | 1982-09-30 | optical head |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5953535U (en) |
-
1982
- 1982-09-30 JP JP14880282U patent/JPS5953535U/en active Pending
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