JPS6283225U - - Google Patents
Info
- Publication number
- JPS6283225U JPS6283225U JP17453785U JP17453785U JPS6283225U JP S6283225 U JPS6283225 U JP S6283225U JP 17453785 U JP17453785 U JP 17453785U JP 17453785 U JP17453785 U JP 17453785U JP S6283225 U JPS6283225 U JP S6283225U
- Authority
- JP
- Japan
- Prior art keywords
- mirror
- light
- optical axis
- lens
- reflected
- 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
- 239000004065 semiconductor Substances 0.000 claims description 3
- 230000001154 acute effect Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 4
Landscapes
- Optical Head (AREA)
Description
第１図は本考案の実施例の光学ヘツドの構成図
、第２図は従来の光学ヘツドの構成図、第３図は
従来の改良型光学ヘツドの構成図、第４図は半導
体レーザの方向とレーザビームの光束の関係を示
す図、第５図はプリズムを通過した光の広がりの
変化の説明図である。
１……半導体レーザ、２……コリメートレンズ
、３……ハーフミラー、４……対物レンズ、５…
…デイスク、６……集光レンズ、７……円筒レン
ズ、８……受光素子、９……ミラー、１０……プ
リズム。
Fig. 1 is a block diagram of an optical head according to an embodiment of the present invention, Fig. 2 is a block diagram of a conventional optical head, Fig. 3 is a block diagram of a conventional improved optical head, and Fig. 4 is a direction of the semiconductor laser. FIG. 5 is an explanatory diagram of changes in the spread of light passing through a prism. 1...Semiconductor laser, 2...Collimating lens, 3...Half mirror, 4...Objective lens, 5...
... Disk, 6 ... Condensing lens, 7 ... Cylindrical lens, 8 ... Light receiving element, 9 ... Mirror, 10 ... Prism.
Claims (1)
ンズで平行光線にし、ハーフミラーを通してミラ
ーで反射させて光軸を変え、対物レンズでデイス
ク上に光ビームを集束して光のスポツトを当て、
その反射ビームを前記対物レンズ、前記ミラーを
経て光軸を元に戻し、前記ハーフミラーで光軸の
方向を変換し、集束レンズ及び円筒レンズを介し
て受光素子に導き、前記デイスク上の記録情報を
読み取る光学ヘツドにおいて、前記コリメートレ
ンズとミラーの間にプリズムをおいて光軸を下げ
、ミラーで鋭角に反射させて全体の高さを低くし
たことを特徴とする光学ヘツド。 The light beam emitted from the semiconductor laser is made into parallel light beams using a collimating lens, reflected by a mirror through a half mirror to change the optical axis, and the light beam is focused onto a disk using an objective lens to strike a spot of light.
The reflected beam passes through the objective lens and the mirror, returns the optical axis to its original state, changes the direction of the optical axis with the half mirror, and guides the reflected beam to the light receiving element through the converging lens and the cylindrical lens, where information recorded on the disk is transmitted. 1. An optical head for reading images, characterized in that a prism is placed between the collimating lens and the mirror to lower the optical axis, and the mirror reflects the light at an acute angle to reduce the overall height.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17453785U JPS6283225U (en) | 1985-11-12 | 1985-11-12 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17453785U JPS6283225U (en) | 1985-11-12 | 1985-11-12 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6283225U true JPS6283225U (en) | 1987-05-27 |
Family
ID=31113012
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17453785U Pending JPS6283225U (en) | 1985-11-12 | 1985-11-12 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6283225U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007335025A (en) * | 2006-06-16 | 2007-12-27 | Pentax Corp | Optical disk drive device |
-
1985
- 1985-11-12 JP JP17453785U patent/JPS6283225U/ja active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007335025A (en) * | 2006-06-16 | 2007-12-27 | Pentax Corp | Optical disk drive device |
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