JPS59157224U - Irradiation beam control device - Google Patents
Irradiation beam control deviceInfo
- Publication number
- JPS59157224U JPS59157224U JP5083383U JP5083383U JPS59157224U JP S59157224 U JPS59157224 U JP S59157224U JP 5083383 U JP5083383 U JP 5083383U JP 5083383 U JP5083383 U JP 5083383U JP S59157224 U JPS59157224 U JP S59157224U
- Authority
- JP
- Japan
- Prior art keywords
- control device
- detector
- irradiation
- irradiation beam
- recording medium
- 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) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
第１図は光学的情報再生装置の概略線図、第２図はナイ
フェツジ法の原理説明図で、イは光学系、口は検出器の
状態を示し、第３図は本考案による照射ビーム制御装置
の検出器の一例の形状を示す図、第４図は本考案による
照射ビーム制御装置の動作説明図で、イは光学系、口は
検出器の状態を示す。
１・・・レーザ光源、３・・・偏光ビームスプリッタ、
λ
４・・・１板、５・・・ミラー、６・・・対物レンズ、
７・・・ディスク、８・・・モータ、９．１２・・・検
出器、９ａ。
９ｂ、 １２ａ、 １２ｂ−・・検出片。Fig. 1 is a schematic diagram of the optical information reproducing device, Fig. 2 is a diagram explaining the principle of the Knifetsu method, A shows the optical system, and Fig. 3 shows the state of the detector. Fig. 3 shows the irradiation beam control according to the present invention. FIG. 4 is a diagram showing the shape of an example of the detector of the apparatus. FIG. 4 is an explanatory diagram of the operation of the irradiation beam control device according to the present invention, where A shows the optical system and the mouth shows the state of the detector. 1... Laser light source, 3... Polarizing beam splitter,
λ 4...1 plate, 5...mirror, 6...objective lens,
7...Disc, 8...Motor, 9.12...Detector, 9a. 9b, 12a, 12b--Detection piece.
Claims (1)
り用ビームの該記録媒体からの反射ビームをビーム検出
器により受光し、該ビーム検出器の出力に基づいて照射
ビームの焦点位置を制御する照射ビーム制御装置におい
て、前記ビーム検出器のビーム受光面が受光面積の異な
る２つの検出片に分割され且つビーム合焦時におけるビ
ームスポットの中心を受光面積の小さい方の検出片の側
縁に合わせたとき前記雨検出片の受光量が等しくなるよ
うにしたことを特徴とする照射ビーム制御装置。An irradiation beam that receives a reflected beam from the recording medium of an information recording beam or an information reading beam that is irradiated onto a recording medium by a beam detector, and controls the focal position of the irradiation beam based on the output of the beam detector. In the control device, when the beam-receiving surface of the beam detector is divided into two detection pieces with different light-receiving areas, and the center of the beam spot at the time of beam focusing is aligned with the side edge of the detection piece with the smaller light-receiving area. An irradiation beam control device characterized in that the amounts of light received by the rain detection pieces are made equal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5083383U JPS59157224U (en) | 1983-04-07 | 1983-04-07 | Irradiation beam control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5083383U JPS59157224U (en) | 1983-04-07 | 1983-04-07 | Irradiation beam control device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS59157224U true JPS59157224U (en) | 1984-10-22 |
Family
ID=30181280
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5083383U Pending JPS59157224U (en) | 1983-04-07 | 1983-04-07 | Irradiation beam control device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59157224U (en) |
-
1983
- 1983-04-07 JP JP5083383U patent/JPS59157224U/en active Pending
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