JPH01296441A - laser disc - Google Patents
laser discInfo
- Publication number
- JPH01296441A JPH01296441A JP63126309A JP12630988A JPH01296441A JP H01296441 A JPH01296441 A JP H01296441A JP 63126309 A JP63126309 A JP 63126309A JP 12630988 A JP12630988 A JP 12630988A JP H01296441 A JPH01296441 A JP H01296441A
- Authority
- JP
- Japan
- Prior art keywords
- film
- shape memory
- laser
- present
- written
- 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
Landscapes
- Thermal Transfer Or Thermal Recording In General (AREA)
- Optical Record Carriers And Manufacture Thereof (AREA)
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
【発明の詳細な説明】 ［産業上の利用分野１ 本発明はレーザー・ディスクの記憶材料構成に関する。[Detailed description of the invention] [Industrial application field 1 The present invention relates to the storage material composition of laser discs.
［従来の技術］
従来、レーザー・ディスクは書き込み消去可能なものと
しては、カルコゲナイド系のアモルファス半導体膜等を
用いるものや、マグネット−オプティックス系の磁性体
膜を用いるもの等があった。[Prior Art] Conventionally, laser disks that can be written and erased include those that use a chalcogenide-based amorphous semiconductor film, and those that use a magnet-optics-based magnetic film.
し発明が解決しようとする課題１
しかし、上記従来技術によると、書き込み、消去の回数
に制限が有ったり、コスト高につく等の課題があった。Problem 1 to be Solved by the Invention However, the above-mentioned conventional technology has problems such as limitations on the number of times of writing and erasing and high costs.
本発明は、かかる従来技術の課題をなくし、低廉で且つ
書き込み、消去が多数回可能なレーザー・ディスクを提
供する事を目的とする。It is an object of the present invention to eliminate the problems of the prior art and to provide a laser disc that is inexpensive and capable of being written and erased many times.
［課題を解決するための手段］
上記課題を解決するために、本発明はレーザー・ディス
クに関し、
（１）レーザー光線による書き込み、消去及び読み取り
が可能な記憶膜として、形状記憶合金膜を用いる手段を
取る事、及び
（２）形状記憶合金膜に代え、形状記憶樹脂膜を用いる
手段を取る事、及び
（３）形状記憶樹脂膜に代え、液晶ポリマー膜を用いる
手段を取る事、
等の手段をとる。[Means for Solving the Problems] In order to solve the above problems, the present invention relates to a laser disk, and includes: (1) means for using a shape memory alloy film as a memory film that can be written, erased, and read by a laser beam; (2) using a shape memory resin film instead of the shape memory alloy film; and (3) using a liquid crystal polymer film instead of the shape memory resin film. Take.
［実 施 例１ 以下、実施例により本発明を詳述する。[Implementation Example 1] Hereinafter, the present invention will be explained in detail with reference to Examples.
第１図は、本発明の一実施例を示すレーザー・ディスク
の書き込み、消去及び読み出し作用を示すディスクの断
面図である。今、（ａ）ガラスあるいは、プラスチック
等の円盤の基板１の表面にＴ ｉ −Ｎ ｉ等の形状記
憶合金膜や、形状記憶樹脂膜、あるいは液晶ポリマー膜
等の記憶膜２を数ミクロン厚で形成する。尚該記憶膜２
の表面に反射膜として、１ミクロン厚程度のＡｌ１膜等
を形成しても良い。次で、（ｂ）、書き込みとして強い
強度のｈν１３なるレーザー光線によりビット４を孔と
して直径１ミクロン径、深さ３．００オングストロ一ム
程度に゛１°゛情報として書き込む。勿論材料によりビ
ット４は凸状になる場合もあり得る。次で（Ｃ）、読み
出しとして弱いレーザー光線強度、ｈ Ｖ ２５を照射
し、その反射光６により“０゛°又は“°１°°情報を
読み取る。次で（ｄ）消去したい場合にはｈν２６より
は強い強度のレーザー光線であるｈν３７によりビット
４を無くする事ができる。本発明による情報の書き込み
及び消去は、形状記憶合金膜や形状記憶樹脂膜の相変換
による寸法変換あるいは液晶ポリマー膜の場合は配向変
換による寸法変換によるものである。FIG. 1 is a cross-sectional view of a laser disk showing writing, erasing, and reading operations according to an embodiment of the present invention. (a) On the surface of a disk substrate 1 made of glass or plastic, a memory film 2 such as a shape memory alloy film such as Ti-Ni, a shape memory resin film, or a liquid crystal polymer film is applied to a thickness of several microns. Form. Furthermore, the memory film 2
An Al1 film or the like having a thickness of about 1 micron may be formed as a reflective film on the surface. Next, (b), as writing, the bit 4 is made into a hole with a diameter of 1 micron and a depth of about 3.00 angstroms as "1" information is written using a laser beam hv13 of high intensity. Of course, the bit 4 may have a convex shape depending on the material. Next (C), a weak laser beam intensity h V 25 is irradiated for reading, and "0°" or "°1°" information is read by the reflected light 6. In the next step (d), when it is desired to erase bit 4, bit 4 can be erased using hv37, which is a laser beam with a stronger intensity than hv26. The writing and erasing of information according to the present invention is achieved by dimensional transformation by phase transformation of a shape memory alloy film or shape memory resin film, or by orientation transformation in the case of a liquid crystal polymer film.
［発明の効果］
本発明によるレーザー・ディスクは低廉となり、且つ書
き込み、消去の速度が早く、何回でも書き込み、消去が
可能となる効果がある。[Effects of the Invention] The laser disk according to the present invention has the advantage that it is inexpensive, has fast writing and erasing speeds, and can be written and erased any number of times.
第１図（ａ）〜（ｄ、）は本発明の一実施例を示すレー
ザー・ディスクの書き込み、消去及び読み取り動作を示
す断面図である。
１・・・基板
２・・・記憶膜
３ ・ ・ ・ ｈν１
４・・・ビット
５・・・ｈν２
６・・・反射光
７・・・ｈν。
以上
出願人 セイコーエプソン株式会社FIGS. 1(a) to 1(d) are cross-sectional views showing writing, erasing, and reading operations of a laser disk according to an embodiment of the present invention. 1...Substrate 2...Memory film 3... hν1 4...Bit 5...hν2 6...Reflected light 7...hν. Applicant: Seiko Epson Corporation
Claims (3)
が可能な記憶膜として、形状記憶合金膜を用いて成る事
を特徴とするレーザー・ディスク。(1) A laser disk characterized in that it uses a shape memory alloy film as a memory film that can be written, erased, and read by a laser beam.
成る事を特徴とする第１項記載のレーザー・ディスク。(2) The laser disk according to item 1, characterized in that a shape memory resin film is used in place of the shape memory alloy film.
成る事を特徴とする第２項記載のレーザー・ディスク。(3) The laser disk according to item 2, characterized in that a liquid crystal polymer film is used in place of the shape memory resin film.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63126309A JPH01296441A (en) | 1988-05-24 | 1988-05-24 | laser disc |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63126309A JPH01296441A (en) | 1988-05-24 | 1988-05-24 | laser disc |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01296441A true JPH01296441A (en) | 1989-11-29 |
Family
ID=14931997
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63126309A Pending JPH01296441A (en) | 1988-05-24 | 1988-05-24 | laser disc |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01296441A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1992014616A1 (en) * | 1991-02-20 | 1992-09-03 | Tdk Corporation | Optical recording medium |
-
1988
- 1988-05-24 JP JP63126309A patent/JPH01296441A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1992014616A1 (en) * | 1991-02-20 | 1992-09-03 | Tdk Corporation | Optical recording medium |
| US5364708A (en) * | 1991-02-20 | 1994-11-15 | Tdk Corporation | Optical recording medium |
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