JPS62147135U - - Google Patents
Info
- Publication number
- JPS62147135U JPS62147135U JP3562286U JP3562286U JPS62147135U JP S62147135 U JPS62147135 U JP S62147135U JP 3562286 U JP3562286 U JP 3562286U JP 3562286 U JP3562286 U JP 3562286U JP S62147135 U JPS62147135 U JP S62147135U
- Authority
- JP
- Japan
- Prior art keywords
- light
- beams
- optical head
- separation means
- light sources
- 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 5
- 238000000926 separation method Methods 0.000 claims 2
- 238000001514 detection method Methods 0.000 claims 1
- 230000001678 irradiating effect Effects 0.000 claims 1
- 238000012544 monitoring process Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 1
Landscapes
- Optical Head (AREA)
Description
第１図ａ，ｂは本考案による複数ビーム光ヘツ
ドの二つの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。
１０，１０′……プリズム、１１，１２，１３
……反射面、１４……ミラー、１５，１６，３０
……検出器、２０ａ，２０ｂ，２０ｃ，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……検出器。
1A and 1B are block diagrams showing two embodiments 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, 10'... Prism, 11, 12, 13
... Reflective surface, 14 ... Mirror, 15, 16, 30
...Detector, 20a, 20b, 20c, 20d...
...Laser light, 21a, 21b...Semiconductor laser,
22... Collimating lens, 23... Polarizing beam splitter, 24... Quarter wavelength plate, 25... Actuator, 26... Converging lens, 27... Recording medium, 28... Lens, 29... Detector .
Claims (1)
数のスポツトを照射して情報を記録再生する複数
ビーム光ヘツドにおいて、前記複数の光源から放
射した光軸が互いに平行でない複数ビームを空間
的に分離する光分離手段と、この分離手段により
分離された一方の光ビームをモニタする光検出手
段とを備え、前記光分離手段として前記複数ビー
ムのうち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少なくとも１つ設定した
プリズムを用いたことを特徴とした複数ビーム光
ヘツド。 In a multi-beam optical head that is equipped with a plurality of light sources and records and reproduces information by irradiating a plurality of spots onto a disk-shaped recording medium, the plurality of beams emitted from the plurality of light sources whose optical axes are not parallel to each other are spatially separated. and a light detection means for monitoring one of the light beams separated by the separation means, the light separation means being configured to allow one beam of the plurality of beams to enter at an angle smaller than a critical angle. A multi-beam optical head characterized by using a prism having at least one reflective surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3562286U JPS62147135U (en) | 1986-03-11 | 1986-03-11 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3562286U JPS62147135U (en) | 1986-03-11 | 1986-03-11 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62147135U true JPS62147135U (en) | 1987-09-17 |
Family
ID=30845275
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3562286U Pending JPS62147135U (en) | 1986-03-11 | 1986-03-11 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62147135U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57132114A (en) * | 1981-02-07 | 1982-08-16 | Olympus Optical Co Ltd | Dividing method of light flux |
-
1986
- 1986-03-11 JP JP3562286U patent/JPS62147135U/ja active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57132114A (en) * | 1981-02-07 | 1982-08-16 | Olympus Optical Co Ltd | Dividing method of light flux |
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