JPS58159641U - Optical information recording and reproducing device - Google Patents
Optical information recording and reproducing deviceInfo
- Publication number
- JPS58159641U JPS58159641U JP5426882U JP5426882U JPS58159641U JP S58159641 U JPS58159641 U JP S58159641U JP 5426882 U JP5426882 U JP 5426882U JP 5426882 U JP5426882 U JP 5426882U JP S58159641 U JPS58159641 U JP S58159641U
- Authority
- JP
- Japan
- Prior art keywords
- light
- optical
- recording
- information recording
- optical information
- 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.)
- Granted
Links
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
第１図は従来の光学式情報記録再生装置の偏光器の一例
を示した断面図、第２図は正面図、第３図は本考案の光
学式情報記録再生装置の一実施例を示した断面図、第４
図は本実施例を構成する光学手段の一例を示した断面図
、第５図は本実施例を構成する楔形プリズムと対物レン
ズとの半径比を示した正面図、第６図は本実施例を構成
する受、光素子の一例を示した平面図、第７図は本実施
例の第１光線と第２光線とのビーム・スポットがディス
クに照射されている状態を示した平面図、第８図は同じ
く第１光線と第２光線のスポット形状のエネルギー強度
の計算値を余したグラフ、第９図は本考案の他の実施例
における受光素子の一例を示した平面図、第１０図は同
じくディスクのピット形状を示した平面図、第１１図は
ピット幅が０．３μｍとした時のＭ−Ｔ−Ｆ特性を比較
した状態のグラフ、第１２図はピット幅０．４μｍ−と
じた時のＭ−Ｔ−Ｆ特性を比較した状態のグラフを示す
。
１・・・・・・光源、３・・・・・・光学的手段、４・
・・・・・ビームスプリッタ−１５・・・・・・楔プリ
ズム、６・・・・・・第１光線、７・・・・・・ディス
ク、８・・・・・・第２光線、１０・・・・・・対物レ
ンズ、１２．１２’・・・・・・ピット、１８・・・・
・・不感体、１９・・・・・・感体、Ａ、 Ｂ・・・・
・・スポット、１５．１６・・・・・・受光素子、Ｒ・
・・・・・対物レンズ１０の半径、ｒ・・・・・・楔プ
リズム５の半径、Ｒ′・・・・・・感体１９の半径、ｒ
′・・・・・・不惑体１８の半径。
第８図
１
Ｈ。
十「薯 第９図 ５
８−１
畝かう、、！ｆｆｊＩｔ
ＩＦFig. 1 is a sectional view showing an example of a polarizer of a conventional optical information recording/reproducing device, Fig. 2 is a front view, and Fig. 3 is an embodiment of the optical information recording/reproducing device of the present invention. Cross section, 4th
The figure is a sectional view showing an example of the optical means constituting this embodiment, FIG. 5 is a front view showing the radius ratio of the wedge-shaped prism and objective lens constituting this embodiment, and FIG. 6 is this embodiment FIG. 7 is a plan view showing an example of the receiver and optical element constituting the optical element; FIG. Figure 8 is a graph showing the calculated values of the energy intensities of the spot shapes of the first and second light rays, Figure 9 is a plan view showing an example of a light receiving element in another embodiment of the present invention, and Figure 10. is a plan view showing the pit shape of the disk, FIG. 11 is a graph comparing the M-T-F characteristics when the pit width is 0.3 μm, and FIG. 12 is a graph showing the pit width of 0.4 μm. The graph shows a comparison of M-T-F characteristics when 1...Light source, 3...Optical means, 4.
...Beam splitter-15... Wedge prism, 6... First light beam, 7... Disk, 8... Second light beam, 10 ...Objective lens, 12.12'...Pit, 18...
...Insensitive body, 19... Sensible body, A, B...
... Spot, 15.16... Light receiving element, R.
... Radius of objective lens 10, r ... Radius of wedge prism 5, R' ... Radius of sensitive body 19, r
′...Radius of the unfathomable body 18. Figure 8 1H. 10 Figure 9 5 8-1 Ungeau...!ffjIt IF
Claims (2)
定の信号情報を光学的に記録再生する光学式情報記録再
生装置において、前記光源からの光線を光学的手段を用
いて光軸周りの第１光線と周辺の第２光線とに分離し、
該第１光線を前記記録媒体上に記録されたトラックの追
従用として第１の受光素子で受光し、前記第２光線を前
記第１光線のスポットから一定距離、離れた位置に集光
させて前記記録媒体の信号の記録再生用として第２の受
光素子で受光することを特徴とした光学式記録再生装置
。(1) In an optical information recording and reproducing device that optically records and reproduces predetermined signal information on a recording medium such as a disk using a single light source, the light beam from the light source is transmitted around the optical axis using optical means. Separated into a first ray of light and a second ray of light in the periphery,
The first light beam is received by a first light receiving element for tracking a track recorded on the recording medium, and the second light beam is focused at a position a certain distance away from the spot of the first light beam. An optical recording and reproducing device, characterized in that a second light receiving element receives light for recording and reproducing signals on the recording medium.
楔形プリズムを接合して形成されたことを特徴とした実
用新案登録請求の範囲第１項記載の光学式情報記録再生
装置。 ＋３＋ 前記第２の受光素子の受光器の中心部分を遮
蔽するか或いはその中心部分を不惑帯にしたことを特徴
とした実用新案登録請求の範囲第１項又は第２項記載の
光学式情報記録再生装置。(2) The optical information recording and reproducing apparatus according to claim 1, wherein the optical means is formed by joining a wedge-shaped prism to the light source side of a beam splitter. +3+ Optical information recording according to claim 1 or 2 of the utility model registration claim, characterized in that the central part of the light receiver of the second light receiving element is shielded or the central part is made into a fuwa zone. playback device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5426882U JPS58159641U (en) | 1982-04-16 | 1982-04-16 | Optical information recording and reproducing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5426882U JPS58159641U (en) | 1982-04-16 | 1982-04-16 | Optical information recording and reproducing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58159641U true JPS58159641U (en) | 1983-10-24 |
| JPS6319944Y2 JPS6319944Y2 (en) | 1988-06-03 |
Family
ID=30064896
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5426882U Granted JPS58159641U (en) | 1982-04-16 | 1982-04-16 | Optical information recording and reproducing device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58159641U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60138748A (en) * | 1983-12-27 | 1985-07-23 | Toshiba Corp | Optical information reproducing device |
| JPS6325844A (en) * | 1986-07-18 | 1988-02-03 | Canon Inc | Optical head |
| JPS6325843A (en) * | 1986-07-18 | 1988-02-03 | Canon Inc | Optical head |
-
1982
- 1982-04-16 JP JP5426882U patent/JPS58159641U/en active Granted
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60138748A (en) * | 1983-12-27 | 1985-07-23 | Toshiba Corp | Optical information reproducing device |
| JPS6325844A (en) * | 1986-07-18 | 1988-02-03 | Canon Inc | Optical head |
| JPS6325843A (en) * | 1986-07-18 | 1988-02-03 | Canon Inc | Optical head |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6319944Y2 (en) | 1988-06-03 |
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