JPS62271234A - Optical information erasing method - Google Patents
Optical information erasing methodInfo
- Publication number
- JPS62271234A JPS62271234A JP61115264A JP11526486A JPS62271234A JP S62271234 A JPS62271234 A JP S62271234A JP 61115264 A JP61115264 A JP 61115264A JP 11526486 A JP11526486 A JP 11526486A JP S62271234 A JPS62271234 A JP S62271234A
- Authority
- JP
- Japan
- Prior art keywords
- melting
- groove
- optical
- spot
- erasing
- 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 title claims abstract description 20
- 238000000034 method Methods 0.000 title claims description 7
- 238000002844 melting Methods 0.000 claims abstract description 27
- 230000008018 melting Effects 0.000 claims abstract description 27
- 238000010583 slow cooling Methods 0.000 claims description 5
- 230000001788 irregular Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
Abstract
Description
【発明の詳細な説明】 ３、発明の詳細な説明 産業上の利用分野 レーザー光を光デイスク上に絞って情報を記録。[Detailed description of the invention] 3. Detailed description of the invention Industrial applications Information is recorded by focusing a laser beam onto an optical disk.
再生及び消去する方法に関する。Concerning reproduction and erasing methods.
従来の技術
光ディスクにより高密度に、より高転送レートで情報を
記録、再生及び消去する事が望まれている。−ｉ開昭５
９−３６３３８号公報に、第５図のようにディスク上に
Ｖ溝を設け、２つのレーザースポット１及び２をそのＶ
溝の隣り合う２斜面上に絞り、情報を同時に、独立に、
記録再生する方法が提案されている。更に、特開昭６０
−６６３３２号公報より、長円形又は多数個の丸いスポ
ット３をＶ溝の底に絞って、隣り合う２斜面の清報を同
時（てｌ消去する。2. Description of the Related Art It is desired to record, reproduce, and erase information with higher density and higher transfer rate using optical discs. -i Kaisho 5
9-36338, a V groove is provided on the disk as shown in Fig. 5, and two laser spots 1 and 2 are placed in the V groove.
Information is transmitted simultaneously and independently on two adjacent slopes of the groove.
A recording/reproducing method has been proposed. Furthermore, JP-A-60
According to Japanese Patent No. 66332, an oval or a large number of round spots 3 are focused on the bottom of the V-groove to simultaneously erase the light on two adjacent slopes.
だが、特開昭６０−２３１９２８号公報（・て示されて
いる様に、消去スポットとしては、第６図のように先頭
に丸いスポット４を配置して、一度記録薄膜を熔融した
後、徐冷のための長円形または多数個の丸いスポット５
を配置する必要がある。However, as shown in Japanese Unexamined Patent Publication No. 60-231928, the erasing spot is a round spot 4 placed at the beginning as shown in Figure 6, and after the recording thin film is once melted, Oval or multiple round spots for cooling 5
need to be placed.
発明が解決しようとする問題点
第６図でディスタ回転方向を逆にすれば、記録再生スポ
ットを熔融のために利用できる。しかし、その場合には
、消去後、直ちには情報の記録はできず、所謂、同時消
録ができない。やはり、消去スポットには、記録再生ス
ポットとは反射位置に、２斜面を同時に熔融できるほど
巾広く熔融できるスポットが必要である。Problems to be Solved by the Invention If the disk rotation direction is reversed in FIG. 6, the recording/reproducing spot can be used for melting. However, in that case, information cannot be recorded immediately after erasure, and so-called simultaneous erasure is not possible. After all, the erasing spot needs to be a spot that is so wide that it can melt two slopes at the same time, at a reflective position from the recording/reproducing spot.
問題点を解決するための手段 本発明は新たに熔融用スポットを追加するものである。Means to solve problems The present invention adds a new melting spot.
そのスポットで巾広く熔融できるだめの手段としては、
熔融ビームの入射光路中に、そのビームの中心に頂点を
もつ５角形の透過型プリズムを挿入するものである。As a means of melting widely in that spot,
A pentagonal transmission prism having an apex at the center of the beam is inserted into the incident optical path of the melt beam.
作用
この構成により本発明は５角形プリズムによって、１つ
の熔融ビームをＳ角形プリズムにより２つの方向に分離
し、互いに重なり合った２つのスポットを形成して、熔
融巾を広くできる。従って、Ｖ ｔ’Ｒの隣接する２斜
面を同時に熔融できる。また、Ｕ溝（凹凸溝）の場合で
も、熔融巾が広いことは安定な消去を達成できる。Operation With this configuration, the present invention can separate one melting beam into two directions by the S-gon prism using the pentagonal prism, form two spots overlapping each other, and widen the melting width. Therefore, two adjacent slopes of V t'R can be melted at the same time. Furthermore, even in the case of a U-groove (uneven groove), stable erasing can be achieved if the melting width is wide.
実施例
実施例１
第１図を用いて熔融スポットの作り方を説明する。熔融
ビーム６の入射光路中に５角形プリズム７を配置し、微
かに方向の異なる２つのビームａ。Examples Example 1 How to make a melting spot will be explained using FIG. A pentagonal prism 7 is arranged in the incident optical path of the melt beam 6, and two beams a are produced with slightly different directions.
ｂに分ける。ビームａ、ｂの各々は対物レンズ８でＶ溝
ディスク９の隣接２斜面に絞られる。第２図＆に、他の
徐冷スポット３や記録再生スポット１及び２と共に、熔
融スポット１０を示しておく。Divide into b. Each of the beams a and b is focused by an objective lens 8 onto two adjacent slopes of a V-groove disk 9. FIG. 2 & shows the melting spot 10 along with other slow cooling spots 3 and recording/reproducing spots 1 and 2.
２斜面が熔融さえされれば、徐冷ば１つのスポット３で
も十分であるが、徐冷ビームの入射光路中にも６角形プ
リズムを挿入して、第２図すのようなスポクト列を作る
事もできる。As long as the two slopes are melted, one slow cooling beam spot 3 is sufficient, but a hexagonal prism is also inserted into the incident optical path of the slow cooling beam to form a spot row as shown in Figure 2. I can do things.
■溝の山と山とのピッチ（２Ｐ）を１．６〜２．５μｍ
とし、２つの熔融スポットの中心間隔を０．８〜１．２
５μｍ位にすればいい。対物レンズ１２の焦点距離３〜
６ｆｌであり、６角形プリズムの素材の屈折率を１．５
とすれば、角度θは３０秒〜１分３０秒であろう
実施例２
第３図のようにＵ溝（凹凸溝）１１の場合についても説
明する。熔融スポット１２．徐冷スポット１３及び記録
再生スポット１４が配置されている。少なくとも、熔融
ビームの入射光路中に、第１図のような５角プリズム７
を挿入する。２つのスポットが重なり合った熔融スポッ
ト１２を形成して、記録スポット１４よりも巾広く熔融
して、安定な消去を達成できる。また、この熔融スポッ
トのディスク半径方向の光強度分布１６は第４図のよう
になり、記録ビット１６の巾を均一に熔融できるように
なる。記録ビット巾を０．６〜１．０μｍとすれば、６
角プリズムの角度０は２０秒〜１分であればよい、っ
発明の効果
以上のように本発明は少なくとも、熔融ビームの入射光
路中に５角プリズムを挿入することで、■溝の隣接する
２斜面を同時に熔融して消去を可能とする。また、Ｕ溝
の場合も、巾広く均一に熔融して安定な消去を達成でき
る。■Pitch between groove peaks (2P) of 1.6 to 2.5 μm
and the center distance between the two melting spots is 0.8 to 1.2.
The thickness should be around 5 μm. Focal length of objective lens 12 3~
6 fl, and the refractive index of the hexagonal prism material is 1.5.
Then, the angle θ would be 30 seconds to 1 minute and 30 seconds.Embodiment 2 The case of a U groove (groove and groove) 11 as shown in FIG. 3 will also be explained. Melting spot 12. A slow cooling spot 13 and a recording/reproducing spot 14 are arranged. At least a pentagonal prism 7 as shown in FIG.
Insert. By forming a melting spot 12 in which two spots overlap, the melting spot 12 is wider than the recording spot 14, and stable erasing can be achieved. Further, the light intensity distribution 16 of this melting spot in the disk radial direction becomes as shown in FIG. 4, so that the width of the recording bit 16 can be uniformly melted. If the recording bit width is 0.6 to 1.0 μm, 6
The angle 0 of the square prism may be between 20 seconds and 1 minute. Effects of the Invention As described above, the present invention at least inserts a pentagonal prism into the incident optical path of the melting beam, thereby reducing the distance between adjacent grooves. Erasing is possible by melting the two slopes simultaneously. Also, in the case of a U-groove, stable erasing can be achieved by melting widely and uniformly.
第１図は本発明の一実施例における５角プリズムの機能
の説明図、第２図：″ｉ、■溝上のレーザース来例を示
す図、第６図は消去スポットの従来例を示す図である。
６・・・・・・熔融ビーム、７・・・・・５角形プリズ
ム、８・・・・・・対物し／ズ、９・・・・・・ｖ溝デ
ィスク。
代理人の氏名 弁理士 中 尾 敏 男 ＋１か１名第
１図
／、 ２−−一記録昇生スボ・シト
３−−−余冷スボ・ソト
（ｔス：ン（１））
第３図
／／Ｕ５慨
第４図
第５図
第６図
デ
ｉ（
′″′１Fig. 1 is an explanatory diagram of the function of the pentagonal prism in an embodiment of the present invention, Fig. 2 is a diagram showing an example of a laser beam on a groove, and Fig. 6 is a diagram showing a conventional example of an erasing spot. 6... Melting beam, 7... Pentagonal prism, 8... Objective lens, 9... V-groove disk. Name of agent. Patent attorney Satoshi Nakao Male +1 or 1 person Figure 1/, 2--1 record subo-sito 3---after cooling subo-soto (tsu:n(1)) Fig. 3//U5 summary Figure 4 Figure 5 Figure 6
Claims (3)
再生及び消去する方法において、その光ディスク上に、
熔融、徐冷及び記録再生用スポットを配置し、少なくと
も熔融スポットを作るレーザービームの入射光路中に、
その熔融用ビームの光軸に対称で、かつ、その光軸上に
頂点を一致させた５角形プリズムを配置し、熔融ビーム
を微かに方向の異なる２つのビームに分け、各々を光デ
ィスク上に絞り込み、互いに重なり合った２つのスポッ
トを形成する事を特徴とする光学情報消去方法。(1) Record information by focusing a laser onto an optical disc,
In the method of playing and erasing, on the optical disc,
A spot for melting, slow cooling, and recording/reproduction is arranged, at least in the incident optical path of the laser beam that creates the melting spot.
A pentagonal prism is placed that is symmetrical to the optical axis of the melting beam and whose apex coincides with the optical axis, dividing the melting beam into two beams with slightly different directions, and focusing each onto the optical disk. , an optical information erasing method characterized by forming two spots that overlap each other.
頂点をはさむ辺が、底辺と成す角度が３０秒以上１分３
０秒以下として、Ｖ溝の隣接２斜面を同時に熔融して消
去する事を特徴とする特許請求の範囲第１項記載の光学
情報消去方法。(2) A V-groove is provided on the optical disc, and the angle between the sides sandwiching the apex of the pentagonal prism and the base is 30 seconds or more and 1 minute 3
2. The optical information erasing method according to claim 1, wherein two adjacent slopes of the V-groove are simultaneously melted and erased for less than 0 seconds.
頂点をはさむ角が、底辺と成す角が２０秒以上、１分以
内である事を特徴とする特許請求の範囲第１項記載の光
学情報消去方法。(3) A U-groove is provided on the optical disc, and the angle between the apex of the pentagonal prism and the base thereof is 20 seconds or more and 1 minute or less. Optical information erasing method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61115264A JPS62271234A (en) | 1986-05-20 | 1986-05-20 | Optical information erasing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61115264A JPS62271234A (en) | 1986-05-20 | 1986-05-20 | Optical information erasing method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62271234A true JPS62271234A (en) | 1987-11-25 |
Family
ID=14658366
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61115264A Pending JPS62271234A (en) | 1986-05-20 | 1986-05-20 | Optical information erasing method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62271234A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06333237A (en) * | 1993-05-19 | 1994-12-02 | Nec Corp | Optical information recording medium and recording, erasing and reproducing method of optical information |
| US6278680B1 (en) | 1999-03-19 | 2001-08-21 | Hitachi Computer Peripherals Co., Ltd. | Initial crystallization method of recording media and device thereof |
-
1986
- 1986-05-20 JP JP61115264A patent/JPS62271234A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06333237A (en) * | 1993-05-19 | 1994-12-02 | Nec Corp | Optical information recording medium and recording, erasing and reproducing method of optical information |
| US6278680B1 (en) | 1999-03-19 | 2001-08-21 | Hitachi Computer Peripherals Co., Ltd. | Initial crystallization method of recording media and device thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPS6247841A (en) | Storage carrier for optical information | |
| US6278680B1 (en) | Initial crystallization method of recording media and device thereof | |
| JPS62271234A (en) | Optical information erasing method | |
| JPS5823333A (en) | Optical disc | |
| JP2506642B2 (en) | Information recording master recording method | |
| JP2815673B2 (en) | Optical information recording medium | |
| JPH02177131A (en) | Method and device for erasing/recording of optical recording medium | |
| JPH01154584A (en) | Array laser | |
| JPS63304428A (en) | Optical disk device | |
| JP2506138B2 (en) | Optical memory device | |
| JPS6018832A (en) | Optical informaton disk and its recording and reproducing device | |
| JPH01171136A (en) | Substrate for optical memory element | |
| JP3094740B2 (en) | Optical information recording medium and recording / reproducing method thereof | |
| KR100251538B1 (en) | Optical disc recording format | |
| JPH02103752A (en) | Optical disk and its production | |
| JPH03173932A (en) | Optical disk | |
| JPS6228944A (en) | Optical information recording and reproducing disk | |
| JPS63117325A (en) | Recording method for optical information | |
| JPS59140638A (en) | Information recording method | |
| JPS61133053A (en) | Optical information recording device | |
| JPS6247845A (en) | Producing device for master disk of optical disk or the like | |
| JPH07105062B2 (en) | Optical memory card | |
| JPS60127547A (en) | Optical pickup | |
| JPS63217541A (en) | Optical head | |
| JPS62172542A (en) | Optical disk |