JPS59138024U - optical recording and reproducing device - Google Patents
optical recording and reproducing deviceInfo
- Publication number
- JPS59138024U JPS59138024U JP3236683U JP3236683U JPS59138024U JP S59138024 U JPS59138024 U JP S59138024U JP 3236683 U JP3236683 U JP 3236683U JP 3236683 U JP3236683 U JP 3236683U JP S59138024 U JPS59138024 U JP S59138024U
- Authority
- JP
- Japan
- Prior art keywords
- light
- light receiving
- center
- optical recording
- information track
- 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 title claims description 6
- 238000010586 diagram Methods 0.000 description 4
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図は従来例の光検出素子の説明図、第２図は本考案
の光検出素子の一実施例を示す説明図、第３図は本考案
の光学系の一実施例を示す説明図、第４図は情報トラッ
クとビームスポットとの関係を示す説明図、第５図と第
６図は本実施例の光検出素子と光スポットとの関係を示
す説明図であり、第５図はビームスポットが適正状態に
ある場合を、第６図はビームスポットが焦点ずれ及びト
ラッキングずれを生じた場合を示すものである。
１・・・光検出素子、ｌａ、 ｌｂ、 ｌｃ・・・
受光面、５・・・光ビーム、１０・・・情報トラック、
１１・・・ディスク、１４・・・光スポット、Ｂ・・・
情報トラック方向、Ｃ・・・光学系。Fig. 1 is an explanatory diagram of a conventional photodetecting element, Fig. 2 is an explanatory diagram showing an embodiment of the photodetecting element of the present invention, and Fig. 3 is an explanatory diagram showing an embodiment of the optical system of the present invention. , FIG. 4 is an explanatory diagram showing the relationship between the information track and the beam spot, and FIGS. FIG. 6 shows a case where the beam spot is in a proper state, and FIG. 6 shows a case where the beam spot is out of focus and out of tracking. 1... Photodetection element, la, lb, lc...
Light receiving surface, 5... Light beam, 10... Information track,
11...Disk, 14...Light spot, B...
Information track direction, C...optical system.
Claims (1)
ムを、光学系を介して複数の受光面を有する光検出素子
に中心が不動な光スポットとして照射させ、各受光面で
の光量差により、前記光ビームの情報トラックへのトラ
ッキングずれ信号と、ディスクへの焦点すれ信号を検出
する光学的記録再生装置において、前記光検出素子の受
光面を、前記情報トラック方向に平行に３分割し、中央
部の受光面に前記光スポットの中心を位置させ、中央部
の受光面での受光量と、両側部に配置した受光面の受光
量和との差より生じる出力より焦点ず、 れ信号を検
出し、また両側部の受光面の受光量差より生じる出力よ
りトラッキング信号を検出することを特徴とする光学的
記録再生装置。 ゛A light beam irradiated onto a disk forming an information track is irradiated via an optical system onto a photodetecting element having a plurality of light receiving surfaces as a light spot whose center does not move. In an optical recording and reproducing device that detects a tracking deviation signal of a light beam to an information track and a defocus signal to a disk, the light-receiving surface of the photodetecting element is divided into three parts parallel to the information track direction, and a central part is divided into three parts. The center of the light spot is positioned on the light receiving surface of the center, and an out-of-focus signal is detected from the output generated from the difference between the amount of light received on the light receiving surface in the center and the sum of the amounts of light received on the light receiving surfaces placed on both sides. , and an optical recording/reproducing apparatus characterized in that a tracking signal is detected from an output generated from a difference in the amount of light received by light receiving surfaces on both sides.゛
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3236683U JPS59138024U (en) | 1983-03-07 | 1983-03-07 | optical recording and reproducing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3236683U JPS59138024U (en) | 1983-03-07 | 1983-03-07 | optical recording and reproducing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS59138024U true JPS59138024U (en) | 1984-09-14 |
Family
ID=30163194
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3236683U Pending JPS59138024U (en) | 1983-03-07 | 1983-03-07 | optical recording and reproducing device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59138024U (en) |
-
1983
- 1983-03-07 JP JP3236683U patent/JPS59138024U/en active Pending
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