JPH0332726U - - Google Patents
Info
- Publication number
- JPH0332726U JPH0332726U JP8912589U JP8912589U JPH0332726U JP H0332726 U JPH0332726 U JP H0332726U JP 8912589 U JP8912589 U JP 8912589U JP 8912589 U JP8912589 U JP 8912589U JP H0332726 U JPH0332726 U JP H0332726U
- Authority
- JP
- Japan
- Prior art keywords
- groove
- pickup device
- optical pickup
- shaped notch
- light beam
- 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 15
- 239000004065 semiconductor Substances 0.000 claims description 3
- 238000006073 displacement reaction Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 1
Landscapes
- Optical Recording Or Reproduction (AREA)
- Optical Head (AREA)
Description
第１図はこの考案の実施例である光学式ピツク
アツプ装置を示す断面図、第２図は同光学式ピツ
クアツプ装置の溝付ミラーを示す斜視図、第３図
はこの考案の他の実施例である光学式ピツクアツ
プ装置の要部を示す斜視図、第４図は従来の光学
式ピツクアツプ装置を示す光路図である。
１……対物レンズ、２……対物レンズ保持部材
、３……対物レンズ付属ミラー、４……２分割フ
オトデイテクタ、５……光情報記録媒体、６……
軸、７……フオーカシングコイル、１０……ビー
ムスプリツタ、１１……半導体レーザ、１２……
コリメータレンズ、１３……ビームスプリツタ、
１４……ミラー、１５……収束レンズ、１６……
４分割フオトデイテクタ、１７……２分割フオト
デイテクタ、１９……フオトデイテクタ、２０…
…収束レンズ、２１……シリンドリカルレンズ、
２２……４分割フオトデイテクタ。
Fig. 1 is a sectional view showing an optical pickup device which is an embodiment of this invention, Fig. 2 is a perspective view showing a grooved mirror of the same optical pick-up device, and Fig. 3 is another embodiment of this invention. FIG. 4 is a perspective view showing the main parts of a certain optical pickup device, and FIG. 4 is an optical path diagram showing a conventional optical pickup device. DESCRIPTION OF SYMBOLS 1...Objective lens, 2...Objective lens holding member, 3...Mirror attached to the objective lens, 4...2-divided photodetector, 5...Optical information recording medium, 6...
Axis, 7... Focusing coil, 10... Beam splitter, 11... Semiconductor laser, 12...
Collimator lens, 13...beam splitter,
14... Mirror, 15... Converging lens, 16...
4-division photodetector, 17... 2-division photodetector, 19... photodetector, 20...
...Convergent lens, 21...Cylindrical lens,
22...4-division photodetector.
Claims (1)
読取りを行う光学式ピツクアツプ装置において、
光源となる半導体レーザから発したレーザ光を対
物レンズに向けて反射するミラーの一部に溝状切
欠き部を設け、該溝状切欠き部を通過する光束ま
たは該溝状切欠き部で挾まれた部分で反射される
光束が光情報記録媒体に対する情報の書込みまた
は読取り以外の信号を得るための光源として利用
されることを特徴とする光学式ピツクアツプ装置
。 ２ 前記溝状切欠き部を通過する光束を受光素子
で受光し光源の半導体レーザの発光を制御するた
めの信号を得る請求項１の光学式ピツクアツプ装
置。 ３ 前記溝状切欠き部を通過する光束をミラーで
反射し、対物レンズ変位測定装置に入力させる請
求項１の光学式ピツクアツプ装置。 ４ 前記溝状切欠き部を通過する光束を集光光学
系で４分割フオトデイテクタ上に集束させ、可動
部分の姿勢情報を得る請求項１の光学式ピツクア
ツプ装置。[Claims for Utility Model Registration] 1. In an optical pickup device that writes or reads information on an optical information recording medium,
A groove-shaped notch is provided in a part of the mirror that reflects the laser light emitted from the semiconductor laser serving as the light source toward the objective lens, and the light beam passing through the groove-shaped notch or being sandwiched by the groove-shaped notch is provided. What is claimed is: 1. An optical pickup device characterized in that a light beam reflected at a portion of the optical information recording medium is used as a light source for obtaining signals other than writing or reading information on an optical information recording medium. 2. The optical pickup device according to claim 1, wherein a light beam passing through the groove-like notch is received by a light receiving element to obtain a signal for controlling light emission of a semiconductor laser as a light source. 3. The optical pickup device according to claim 1, wherein the light beam passing through the groove-shaped notch is reflected by a mirror and input to an objective lens displacement measuring device. 4. The optical pickup device according to claim 1, wherein the light beam passing through the groove-shaped notch is focused onto a four-part photodetector by a condensing optical system to obtain posture information of the movable part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8912589U JPH0332726U (en) | 1989-07-31 | 1989-07-31 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8912589U JPH0332726U (en) | 1989-07-31 | 1989-07-31 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0332726U true JPH0332726U (en) | 1991-03-29 |
Family
ID=31638720
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8912589U Pending JPH0332726U (en) | 1989-07-31 | 1989-07-31 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0332726U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006252773A (en) * | 2006-06-26 | 2006-09-21 | Hitachi Media Electoronics Co Ltd | Optical pickup and optical disk apparatus |
-
1989
- 1989-07-31 JP JP8912589U patent/JPH0332726U/ja active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006252773A (en) * | 2006-06-26 | 2006-09-21 | Hitachi Media Electoronics Co Ltd | Optical pickup and optical disk apparatus |
| JP4625788B2 (en) * | 2006-06-26 | 2011-02-02 | 株式会社日立メディアエレクトロニクス | Optical pickup and optical disc apparatus |
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