JPH0226130U - - Google Patents
Info
- Publication number
- JPH0226130U JPH0226130U JP10316188U JP10316188U JPH0226130U JP H0226130 U JPH0226130 U JP H0226130U JP 10316188 U JP10316188 U JP 10316188U JP 10316188 U JP10316188 U JP 10316188U JP H0226130 U JPH0226130 U JP H0226130U
- Authority
- JP
- Japan
- Prior art keywords
- optical head
- sensor
- photometric sensor
- diagram showing
- head structure
- 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 9
- 238000001514 detection method Methods 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 5
- 239000004065 semiconductor Substances 0.000 description 2
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 1
- 238000005375 photometry Methods 0.000 description 1
Landscapes
- Optical Head (AREA)
Description
第１図は、本考案に基づく光学ヘツドの構成を
示す模式図である。第２図は、測光センサの軸線
方向に沿う断面図である。第３図は、第２図の
―線について見た断面図である。第４図は、ト
ラツキングエラーの検出要領を示す模式的回路図
である。第５図は、フオーカスエラーの検出要領
を示す模式的回路図である。第６図は、本考案に
基づく光学ヘツドの構成の第２の実施例を示す模
式図である。第７図は、従来の光学ヘツドの構成
を示す模式図である。
１……半導体レーザ、２……出射光、３……コ
リメータレンズ、４……偏光ビームスプリツタ、
５……λ／４板、６……対物レンズ、７……光デ
イスク、８……記録面、９……反射光、１０……
検出光、１１……測光センサ、１２……基板、１
３……円形キヤツプ、１３ａ……開口、１４，１
５……フオトダイオード、１６……集光レンズ、
１７……プリズム体、１８……反射膜、１９……
反射面、２０……リード線、２１〜２６……アン
プ、２７……偏光ビームスプリツタ、２８……λ
／４板、２９……集光レンズ、３０……測光セン
サ、３１……半導体レーザ、３２……出射光、３
３……コリメータレンズ、３４……偏光ビームス
プリツタ、３５……λ／４板、３６……対物レン
ズ、３７……光デイスク、３０……反射光、４０
……検出光、４１……測光センサ、４２……集光
レンズ。
FIG. 1 is a schematic diagram showing the structure of an optical head based on the present invention. FIG. 2 is a cross-sectional view of the photometric sensor along the axial direction. FIG. 3 is a sectional view taken along the line - - in FIG. 2. FIG. 4 is a schematic circuit diagram showing how to detect a tracking error. FIG. 5 is a schematic circuit diagram showing how to detect a focus error. FIG. 6 is a schematic diagram showing a second embodiment of the structure of an optical head based on the present invention. FIG. 7 is a schematic diagram showing the structure of a conventional optical head. 1... Semiconductor laser, 2... Outgoing light, 3... Collimator lens, 4... Polarizing beam splitter,
5...λ/4 plate, 6... Objective lens, 7... Optical disk, 8... Recording surface, 9... Reflected light, 10...
Detection light, 11... Photometric sensor, 12... Board, 1
3...Circular cap, 13a...Opening, 14,1
5...Photodiode, 16...Condensing lens,
17... Prism body, 18... Reflective film, 19...
Reflective surface, 20...Lead wire, 21-26...Amplifier, 27...Polarizing beam splitter, 28...λ
/4 plate, 29... Condensing lens, 30... Photometric sensor, 31... Semiconductor laser, 32... Outgoing light, 3
3... Collimator lens, 34... Polarizing beam splitter, 35... λ/4 plate, 36... Objective lens, 37... Optical disk, 30... Reflected light, 40
...Detection light, 41...Photometry sensor, 42...Condensing lens.
Claims (1)
エラー状態を光学的に検出する一体型測光センサ
を有する光学ヘツド構造であつて、 前記測光センサに入射する検出光を収束させる
集光レンズが、該センサのケーシングの一部をな
すことを特徴とする光学ヘツド構造。[Claims for Utility Model Registration] An optical head structure having an integrated photometric sensor that optically detects both tracking and focusing error states of an optical head, the optical head having a light condenser that converges detection light incident on the photometric sensor. An optical head structure characterized in that the lens forms part of the casing of the sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10316188U JPH0226130U (en) | 1988-08-03 | 1988-08-03 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10316188U JPH0226130U (en) | 1988-08-03 | 1988-08-03 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0226130U true JPH0226130U (en) | 1990-02-21 |
Family
ID=31652015
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10316188U Pending JPH0226130U (en) | 1988-08-03 | 1988-08-03 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0226130U (en) |
-
1988
- 1988-08-03 JP JP10316188U patent/JPH0226130U/ja active Pending
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