JPH025119U - - Google Patents
Info
- Publication number
- JPH025119U JPH025119U JP8125588U JP8125588U JPH025119U JP H025119 U JPH025119 U JP H025119U JP 8125588 U JP8125588 U JP 8125588U JP 8125588 U JP8125588 U JP 8125588U JP H025119 U JPH025119 U JP H025119U
- Authority
- JP
- Japan
- Prior art keywords
- photodetector
- recording medium
- lens
- reflecting mirror
- mirror
- 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 6
- 238000007493 shaping process Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 3
Landscapes
- Optical Head (AREA)
Description
第１図は、本考案の光学ヘツドの構成を示す概
略説明図であり、第２図は反射ミラーと対物レン
ズの関係を示す本考案の光学ヘツドの要部説明図
である。第３図は従来の光学ヘツドの構成を示す
概略説明図である。
５……回析格子、６……反射ミラー、７……対
物レンズ、９……集光レンズ、１０……光検出器
、１３……ハーフミラー。
FIG. 1 is a schematic explanatory diagram showing the structure of the optical head of the present invention, and FIG. 2 is an explanatory diagram of the main parts of the optical head of the present invention, showing the relationship between the reflecting mirror and the objective lens. FIG. 3 is a schematic diagram showing the structure of a conventional optical head. 5... Diffraction grating, 6... Reflection mirror, 7... Objective lens, 9... Condensing lens, 10... Photodetector, 13... Half mirror.
Claims (1)
ズ、ビーム整形プリズム、ピンホール、回析格子
を通し、反射ミラー、対物レンズを介して記録媒
体面上に導き、該記録媒体面からの反射光を反射
ミラーによつて光検出器に導くように構成された
光学ヘツドにおいて、 前記反射ミラーと光検出器間に反射ミラーで反
射されたレーザ光を光検出器に集光させる集光レ
ンズと、該集光レンズと光検出器間にハーフミラ
ーを配置し、該ハーフミラーによつて記録媒体面
上のビームスポツト像を認識しうるように構成し
たことを特徴とする光学ヘツド。[Claims for Utility Model Registration] Laser light from a laser light source is guided onto the surface of a recording medium through a collimator lens, a beam shaping prism, a pinhole, a diffraction grating, a reflection mirror and an objective lens, and the surface of the recording medium is In an optical head configured to guide reflected light from a laser beam to a photodetector by a reflecting mirror, a condenser is provided between the reflecting mirror and the photodetector to focus the laser beam reflected by the reflecting mirror onto the photodetector. 1. An optical head comprising an optical lens, a half mirror disposed between the condensing lens and a photodetector, and a beam spot image on a recording medium surface being recognized by the half mirror.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8125588U JPH025119U (en) | 1988-06-20 | 1988-06-20 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8125588U JPH025119U (en) | 1988-06-20 | 1988-06-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH025119U true JPH025119U (en) | 1990-01-12 |
Family
ID=31306042
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8125588U Pending JPH025119U (en) | 1988-06-20 | 1988-06-20 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH025119U (en) |
-
1988
- 1988-06-20 JP JP8125588U patent/JPH025119U/ja active Pending