JPS6344216U - - Google Patents
Info
- Publication number
- JPS6344216U JPS6344216U JP13615686U JP13615686U JPS6344216U JP S6344216 U JPS6344216 U JP S6344216U JP 13615686 U JP13615686 U JP 13615686U JP 13615686 U JP13615686 U JP 13615686U JP S6344216 U JPS6344216 U JP S6344216U
- Authority
- JP
- Japan
- Prior art keywords
- reflecting mirror
- optical information
- reflected light
- plano
- 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
- 230000003287 optical effect Effects 0.000 claims description 7
- 239000004065 semiconductor Substances 0.000 claims description 3
- 201000009310 astigmatism Diseases 0.000 claims 1
Landscapes
- Optical Head (AREA)
- Optical Recording Or Reproduction (AREA)
Description
第１図はこの考案の一実施例による光学式情報
再生装置を示す平面図、第２図はその側面図、第
３図は従来の光学式情報再生装置を示す平面図、
第４図はその側面図である。
図において、１は半導体レーザ、２は射出光、
４は反射鏡、６は光学式情報記録媒体（デイスク
）、１０は４分割光検出器、１５は平凹レンズ、
１６は非球面対物レンズである。なお、図中、同
一符号は同一、又は相当部分を示す。
FIG. 1 is a plan view showing an optical information reproducing device according to an embodiment of the invention, FIG. 2 is a side view thereof, and FIG. 3 is a plan view showing a conventional optical information reproducing device.
FIG. 4 is a side view thereof. In the figure, 1 is a semiconductor laser, 2 is an emitted light,
4 is a reflecting mirror, 6 is an optical information recording medium (disk), 10 is a 4-split photodetector, 15 is a plano-concave lens,
16 is an aspherical objective lens. In addition, in the figures, the same reference numerals indicate the same or equivalent parts.
Claims (1)
体上に集光させるための非球面形状をもつ単玉の
対物レンズと、前記半導体レーザから前記対物レ
ンズに至る光路中に前記射出光を反射して該対物
レンズに入射させる反射鏡と、前記半導体レーザ
から前記反射鏡に至る光路中に配設され前記射出
光の一部を反射して該反射鏡に導く半透膜でコー
テイングされた平面を有し前記光学式情報記録媒
体からの情報を含んだ反射光を透過し、かつ、該
反射光を非点光束とする平凹レンズと、前記平凹
レンズを透過してくる前記反射光を検出する４分
割光検出器を備えた光学式情報再生装置。 a single objective lens having an aspherical shape for condensing the emitted light from the semiconductor laser onto an optical information recording medium; It has a reflecting mirror that is incident on the objective lens, and a flat surface that is coated with a semi-transparent film that is disposed in an optical path from the semiconductor laser to the reflecting mirror and reflects a part of the emitted light and guides it to the reflecting mirror. a plano-concave lens that transmits the reflected light containing information from the optical information recording medium and converts the reflected light into an astigmatism beam; and a four-division unit that detects the reflected light that passes through the plano-concave lens. Optical information reproducing device equipped with a photodetector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13615686U JPS6344216U (en) | 1986-09-05 | 1986-09-05 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13615686U JPS6344216U (en) | 1986-09-05 | 1986-09-05 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6344216U true JPS6344216U (en) | 1988-03-24 |
Family
ID=31039012
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13615686U Pending JPS6344216U (en) | 1986-09-05 | 1986-09-05 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6344216U (en) |
-
1986
- 1986-09-05 JP JP13615686U patent/JPS6344216U/ja active Pending