JPS60169718U - Optical pickup device - Google Patents
Optical pickup deviceInfo
- Publication number
- JPS60169718U JPS60169718U JP5682084U JP5682084U JPS60169718U JP S60169718 U JPS60169718 U JP S60169718U JP 5682084 U JP5682084 U JP 5682084U JP 5682084 U JP5682084 U JP 5682084U JP S60169718 U JPS60169718 U JP S60169718U
- Authority
- JP
- Japan
- Prior art keywords
- optical pickup
- pickup device
- semiconductor laser
- focus detection
- elliptical cross
- 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)
- Optical Head (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、本考案の特徴を説明するための図、第２図は
、本考案の１実施例を示す側面図、第３図は焦点検出を
説明するための図、第４図はトラック検出を説明するた
めの図、第５図および第６図は本考案の効果を説明する
ための図である。
１０・・・・・・半導体レーザー、２４・・・・・・ト
ラック検出用の２分割受光素子（ナイフェツジ部材）、
２６・・・・・・焦点検出用の２分割受光素子、Ｘ・・
・・・・トラック配列方向。
沁３ 図Fig. 1 is a diagram for explaining the features of the present invention, Fig. 2 is a side view showing one embodiment of the invention, Fig. 3 is a diagram for explaining focus detection, and Fig. 4 is a track diagram. 5 and 6 are diagrams for explaining the detection, and FIGS. 5 and 6 are diagrams for explaining the effects of the present invention. 10... Semiconductor laser, 24... Two-part light receiving element for track detection (knifetsu member),
26...Two-split light receiving element for focus detection, X...
...Track arrangement direction. Figure 3
Claims (1)
焦点検出を行い、トラック検出用の２分割受光素子を、
上記焦点検出用のナイフェツジ部材として用いる、光ピ
ツクアップ装置において、半導体レーザーからの光を、
カップリングレンズにより光束断面形状が楕円形状であ
る平行光束とし、かつ、この楕円形状の光束断面の長軸
方向を、光デイスク上のトラック配列方向に平行的に対
応させたことを特徴とする、光ピツクアップ光学系。A semiconductor laser is used as a light source, a knife-edge focus detection is performed, and a two-split light receiving element for track detection is used.
In the optical pickup device used as the knife member for focus detection, the light from the semiconductor laser is
A coupling lens is used to make a parallel light beam having an elliptical cross section, and the long axis direction of this elliptical cross section corresponds parallel to the track arrangement direction on the optical disk. Optical pickup optical system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5682084U JPS60169718U (en) | 1984-04-18 | 1984-04-18 | Optical pickup device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5682084U JPS60169718U (en) | 1984-04-18 | 1984-04-18 | Optical pickup device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS60169718U true JPS60169718U (en) | 1985-11-11 |
Family
ID=30580779
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5682084U Pending JPS60169718U (en) | 1984-04-18 | 1984-04-18 | Optical pickup device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60169718U (en) |
-
1984
- 1984-04-18 JP JP5682084U patent/JPS60169718U/en active Pending
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