JPS62120432U - - Google Patents
Info
- Publication number
- JPS62120432U JPS62120432U JP902886U JP902886U JPS62120432U JP S62120432 U JPS62120432 U JP S62120432U JP 902886 U JP902886 U JP 902886U JP 902886 U JP902886 U JP 902886U JP S62120432 U JPS62120432 U JP S62120432U
- Authority
- JP
- Japan
- Prior art keywords
- light
- optical
- beams
- recording medium
- prism
- 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 8
- 238000000926 separation method Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
Landscapes
- Moving Of The Head For Recording And Reproducing By Optical Means (AREA)
- Optical Head (AREA)
Description
第１図は本考案による複数ビーム光ヘツドの一
実施例を示す構成図、第２図は従来の一般的な複
数ビーム光ヘツドの構成図である。
１０…プリズム、１１，１２，１３…反射面、
１４…ビーム整形プリズム、２０ａ，２０ｂ，２
０ｃ，２０ｄ…レーザ光、２１ａ，２１ｂ…半導
体レーザ、２２…コリメートレンズ、２３…偏光
ビームスプリツタ、２４…１／４波長板、２５…
アクチユエータ、２６…収束レンズ、２７…記録
媒体、２８…レンズ、２９…ピンホール、３０，
３１…検出器。
FIG. 1 is a block diagram showing an embodiment of a multi-beam optical head according to the present invention, and FIG. 2 is a block diagram of a conventional general multi-beam optical head. 10... Prism, 11, 12, 13... Reflective surface,
14...Beam shaping prism, 20a, 20b, 2
0c, 20d...Laser light, 21a, 21b...Semiconductor laser, 22...Collimating lens, 23...Polarizing beam splitter, 24...1/4 wavelength plate, 25...
Actuator, 26... Converging lens, 27... Recording medium, 28... Lens, 29... Pinhole, 30,
31...Detector.
Claims (1)
記録媒体からの各反射光を光分離手段により各光
軸が平行とならない複数のビームに分離してそれ
ぞれ再生する複数ビーム光ヘツドにおいて、前記
光分離手段が、前記各反射光を入射してこれら反
射光の互いの光軸ずれを拡大する光学手段と、こ
の光学手段の各出力ビームのうち少くとも１つの
ビームが臨界角より小さい角度で入射するような
反射面を設けたプリズムとを備えることを特徴と
する複数ビーム光ヘツド。 In the multi-beam optical head, which irradiates a recording medium with light from a plurality of light sources, and separates each reflected light from the recording medium into a plurality of beams whose optical axes are not parallel by a light separation means and reproduces each beam, The light separating means includes an optical means for inputting each of the reflected lights and magnifying the mutual optical axis deviation of the reflected lights, and at least one of the output beams of the optical means at an angle smaller than a critical angle. A multi-beam optical head comprising: a prism provided with a reflective surface such that the beams are incident on the prism.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP902886U JPS62120432U (en) | 1986-01-24 | 1986-01-24 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP902886U JPS62120432U (en) | 1986-01-24 | 1986-01-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62120432U true JPS62120432U (en) | 1987-07-30 |
Family
ID=30793954
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP902886U Pending JPS62120432U (en) | 1986-01-24 | 1986-01-24 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62120432U (en) |
-
1986
- 1986-01-24 JP JP902886U patent/JPS62120432U/ja active Pending