JPS6431513U - - Google Patents
Info
- Publication number
- JPS6431513U JPS6431513U JP12508487U JP12508487U JPS6431513U JP S6431513 U JPS6431513 U JP S6431513U JP 12508487 U JP12508487 U JP 12508487U JP 12508487 U JP12508487 U JP 12508487U JP S6431513 U JPS6431513 U JP S6431513U
- Authority
- JP
- Japan
- Prior art keywords
- integrated
- optical
- magneto
- laminated
- optical system
- 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 10
- 238000001514 detection method Methods 0.000 claims description 4
- 230000010287 polarization Effects 0.000 claims description 4
- 238000000926 separation method Methods 0.000 claims description 4
- 238000007493 shaping process Methods 0.000 claims description 4
- 238000005286 illumination Methods 0.000 claims description 3
- 201000009310 astigmatism Diseases 0.000 claims 2
- 238000000034 method Methods 0.000 claims 1
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 239000004065 semiconductor Substances 0.000 description 1
Landscapes
- Holo Graphy (AREA)
- Optical Head (AREA)
Description
第１図はこの考案の一実施例を示す概略斜視図
、第２図は拡大して示すその分解斜視図、第３図
は光磁気検出光学系の変形例を示す斜視図、第４
図は異なる変形例を示す斜視図、第５図は照明光
学系の変形例を示す平面図、第６図は異なる変形
例を示す平面図、第７図は更に異なる変形例を示
す平面図、第８図は従来例を示す概略斜視図であ
る。
１…光磁気デイスク（光磁気記録媒体）、２６
…一体型ダブルビームスプリツタ、２７…照明光
学系、２８…サーボ光学系、２９…光磁気検出光
学系、３０…偏波分離素子、３１…平板集光素子
、３３…偏波分離集光素子（偏波分離素子兼平板
集光素子）、３７…ホロレンズ、３８…４分割受
光素子、３９ａ，３９ｂ…受光素子、４０…平板
集光素子、４１…ビーム整形素子、４２…３ビー
ム分割回折格子、４３…半導体レーザ（光源）、
４４…集光素子（ビーム整形素子兼３ビーム分割
回折格子）、４６…集光素子（平板集光素子兼ビ
ーム整形素子兼３ビーム分割回折格子）。
FIG. 1 is a schematic perspective view showing one embodiment of this invention, FIG. 2 is an enlarged exploded perspective view thereof, FIG. 3 is a perspective view showing a modified example of the magneto-optical detection optical system, and FIG.
5 is a plan view showing a modification of the illumination optical system; FIG. 6 is a plan view showing a different modification; FIG. 7 is a plan view showing a further modification. FIG. 8 is a schematic perspective view showing a conventional example. 1...Magneto-optical disk (magneto-optical recording medium), 26
...Integrated double beam splitter, 27.. Illumination optical system, 28.. Servo optical system, 29.. Magneto-optical detection optical system, 30.. Polarization separation element, 31.. Flat plate condensing element, 33.. Polarization separation condensing element. (Polarization separation element and flat plate condensing element), 37... Hololens, 38... 4-split light receiving element, 39a, 39b... Light receiving element, 40... Flat plate condensing element, 41... Beam shaping element, 42... 3 beam splitting diffraction grating , 43... semiconductor laser (light source),
44... Condensing element (beam shaping element and 3-beam splitting diffraction grating), 46... Condensing element (flat plate condensing element and beam shaping element and 3-beam splitting diffraction grating).
Claims (1)
情報の記録又は再生を行ない、前記光源からの分
割された３ビームを前記光磁気記録媒体に照射し
非点収差法によりサーボ用のトラツク信号検出と
焦点信号検出とを行なう光情報記録再生装置にお
いて、平板集光素子とビーム整形素子と３ビーム
分割回折格子とを積層一体化した照明光学系と、
焦点信号検出用の４分割受光素子と２個のトラツ
ク信号検出用の受光素子とに対する非点収差を有
するホロレンズを積層一体化したサーボ光学系と
、偏波分離素子と平板集光素子とを積層一体化し
た光磁気検出光学系とを、一体型ダブルビームス
プリツタに一体化したことを特徴とする光情報記
録再生装置。 A beam from a light source is irradiated onto a magneto-optical recording medium to record or reproduce information, and three divided beams from the light source are irradiated onto the magneto-optical recording medium to detect a track signal for servo using an astigmatism method. In an optical information recording and reproducing device that performs and focal signal detection, an illumination optical system includes a flat condenser element, a beam shaping element, and a three-beam splitting diffraction grating that are laminated and integrated;
A servo optical system in which a hololens with astigmatism is laminated and integrated with a four-part light receiving element for detecting a focus signal and two light receiving elements for detecting a track signal, a polarization separation element and a flat condensing element are laminated. An optical information recording and reproducing device characterized in that an integrated magneto-optical detection optical system is integrated into an integrated double beam splitter.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12508487U JPS6431513U (en) | 1987-08-17 | 1987-08-17 | |
| US07/232,321 US5060212A (en) | 1987-08-17 | 1988-08-15 | Integrated optical pick-up device |
| US07/757,644 US5097462A (en) | 1987-08-17 | 1991-09-11 | Integrated optical pick-up device |
| US07/757,717 US5107477A (en) | 1987-08-17 | 1991-09-11 | Integrated optical pick-up device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12508487U JPS6431513U (en) | 1987-08-17 | 1987-08-17 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6431513U true JPS6431513U (en) | 1989-02-27 |
Family
ID=31375373
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12508487U Pending JPS6431513U (en) | 1987-08-17 | 1987-08-17 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6431513U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01253842A (en) * | 1988-03-31 | 1989-10-11 | Matsushita Electric Ind Co Ltd | Optical head device |
| JPH03102647A (en) * | 1989-09-14 | 1991-04-30 | Sharp Corp | Optical head |
-
1987
- 1987-08-17 JP JP12508487U patent/JPS6431513U/ja active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01253842A (en) * | 1988-03-31 | 1989-10-11 | Matsushita Electric Ind Co Ltd | Optical head device |
| JPH03102647A (en) * | 1989-09-14 | 1991-04-30 | Sharp Corp | Optical head |
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