JPH01174721U - - Google Patents
Info
- Publication number
- JPH01174721U JPH01174721U JP7144488U JP7144488U JPH01174721U JP H01174721 U JPH01174721 U JP H01174721U JP 7144488 U JP7144488 U JP 7144488U JP 7144488 U JP7144488 U JP 7144488U JP H01174721 U JPH01174721 U JP H01174721U
- Authority
- JP
- Japan
- Prior art keywords
- optical disk
- beam splitter
- polarizing beam
- lens
- photodiode
- 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
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Optical Head (AREA)
- Optical Recording Or Reproduction (AREA)
Description
第１図は本考案の一実施例を示したものであり
、光デイスク用ピツクアツプの光学系装置を示し
た解説図である。第２図は従来型の光学系装置を
示した解説図である。
１……レーザーダイオード、２……コリメータ
レンズ、４……偏光ビームスプリツ、５……レー
ザーミラー、６……１／４波長板、７……対物レ
ンズ、８……光デイスク、１１……センサーレン
ズ、１２，１３，１５……ホトダイオード。
FIG. 1 shows one embodiment of the present invention, and is an explanatory diagram showing an optical system device for an optical disk pickup. FIG. 2 is an explanatory diagram showing a conventional optical system device. 1...Laser diode, 2...Collimator lens, 4...Polarized beam split, 5...Laser mirror, 6...1/4 wavelength plate, 7...Objective lens, 8...Optical disk, 11...Sensor lens , 12, 13, 15... photodiode.
Claims (1)
偏光ビームスプリツタの前面に１／４波長板、コ
リメータレンズ及びミラーを配設し、更に、該ミ
ラーの反射方向に対物レンズを設けて、前記光源
の光線を対物レンズにて光デイスク上に集光可能
に形成すると共に、前記偏光ビームスプリツタの
側方にセンサーレンズを設け、このセンサーレン
ズの後方にトラツキング及びフオーカス双方のエ
ラーを同時に検出できるホトダイオードを固設し
、前記光デイスクからの反射光がホトダイオード
で受光できるように形成したことを特徴とする光
デイスク用ピツクアツプの光学系装置。 A polarizing beam splitter is provided in front of the light source, a quarter wavelength plate, a collimator lens, and a mirror are provided in front of the polarizing beam splitter, and an objective lens is provided in the reflection direction of the mirror. A sensor lens is provided on the side of the polarizing beam splitter, and a photodiode is installed behind the sensor lens to simultaneously detect both tracking and focusing errors. 1. An optical system device for a pickup for an optical disk, characterized in that the optical disk is fixedly installed, and the reflected light from the optical disk is formed so as to be received by a photodiode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7144488U JPH01174721U (en) | 1988-05-30 | 1988-05-30 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7144488U JPH01174721U (en) | 1988-05-30 | 1988-05-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01174721U true JPH01174721U (en) | 1989-12-12 |
Family
ID=31296653
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7144488U Pending JPH01174721U (en) | 1988-05-30 | 1988-05-30 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01174721U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57200001A (en) * | 1981-06-02 | 1982-12-08 | Toshiba Corp | Optical record information reader |
-
1988
- 1988-05-30 JP JP7144488U patent/JPH01174721U/ja active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57200001A (en) * | 1981-06-02 | 1982-12-08 | Toshiba Corp | Optical record information reader |
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