JPS6255221B2 - - Google Patents
Info
- Publication number
- JPS6255221B2 JPS6255221B2 JP55135600A JP13560080A JPS6255221B2 JP S6255221 B2 JPS6255221 B2 JP S6255221B2 JP 55135600 A JP55135600 A JP 55135600A JP 13560080 A JP13560080 A JP 13560080A JP S6255221 B2 JPS6255221 B2 JP S6255221B2
- Authority
- JP
- Japan
- Prior art keywords
- recording medium
- information
- laser beam
- material layer
- energy 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.)
- Expired
Links
- 230000001678 irradiating effect Effects 0.000 claims description 5
- 239000000758 substrate Substances 0.000 claims description 3
- 229920001169 thermoplastic Polymers 0.000 claims description 2
- 239000004416 thermosoftening plastic Substances 0.000 claims description 2
- 239000000463 material Substances 0.000 claims 3
- 239000012815 thermoplastic material Substances 0.000 claims 2
- 229910052751 metal Inorganic materials 0.000 description 12
- 239000002184 metal Substances 0.000 description 12
- 229920005992 thermoplastic resin Polymers 0.000 description 10
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 8
- 230000003287 optical effect Effects 0.000 description 6
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 5
- 238000007740 vapor deposition Methods 0.000 description 5
- 229910052786 argon Inorganic materials 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 238000000151 deposition Methods 0.000 description 3
- 239000010408 film Substances 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 2
- 229910052721 tungsten Inorganic materials 0.000 description 2
- 239000010937 tungsten Substances 0.000 description 2
- 239000004952 Polyamide Substances 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 238000007373 indentation Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 238000002310 reflectometry Methods 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
Landscapes
- Thermal Transfer Or Thermal Recording In General (AREA)
- Optical Record Carriers And Manufacture Thereof (AREA)
Description
【発明の詳細な説明】
本発明はレーザ光などのエネルギービーム照射
により情報を記録する記録用媒体に係り、特に光
デイスクの新しい記録方法が実施出来る記録用媒
体に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a recording medium on which information is recorded by irradiation with an energy beam such as a laser beam, and particularly to a recording medium on which a new recording method for optical discs can be implemented.
従来の光デイスクでは情報の記録及び再生が行
える方式のものは記録用媒体がガラスや透明プラ
スチツクの表面に低融点金属膜を被覆したものを
用いていた。この記録用媒体に情報を記録するに
は低融点金属層に強いパワーのレーザ光を照射し
て部分的に金属を溶融して除去する。再生は記録
用媒体上に弱いパワーのレーザ光を照射して、該
レーザ光の透過光又は反射光の有無を検知するこ
とによつて行つている。 Conventional optical disks that are capable of recording and reproducing information use a recording medium made of glass or transparent plastic whose surface is coated with a low-melting point metal film. To record information on this recording medium, the low melting point metal layer is irradiated with a laser beam of high power to partially melt and remove the metal. Reproduction is performed by irradiating a recording medium with a laser beam of low power and detecting the presence or absence of transmitted light or reflected light of the laser beam.
本発明の目的は光デイスクの情報記録用媒体に
於て、従来の金属溶融除去方式の記録用媒体の代
りにレーザ照射部に形成される変形即ち凹部に依
つて情報を記録する記録用媒体を提供することで
光デイスクの記録用媒体の多様化を図ることにあ
る。 An object of the present invention is to provide a recording medium for recording information using a deformation or recess formed in a laser irradiation area in an information recording medium of an optical disk, instead of a conventional recording medium using a metal melting and removal method. The objective is to diversify optical disc recording media by providing such information.
本発明はエネルギービーム記録用媒体としてビ
ーム照射による照射部の熱可塑性変形、即ちへこ
みを利用するものである。熱可塑性樹脂にレーザ
光などのエネルギービームを照射すると照射部は
加えられた熱によつて変形し、へこみとなる。情
報再生のためには弱いレーザ光を照射し、その反
射光を検知するので媒体表面はある程度反射性を
有していなければならないが多くの熱可塑性樹脂
は透明に近い。そこで記録用媒体として熱可塑性
樹脂表面に数十nmの金属薄膜層を設ける。この
媒体にレーザ光を照射すると金属層あるいは樹脂
層に加えられた熱によつて媒体がへこみ、へこみ
の深さは照射するレーザ光の強度により変化させ
ることができる。従つて、情報記録の際にレーザ
光の強度を調整し、へこみの深さを読出用レーザ
光の波長の1/8又は1/4とすることができる。へこ
みの深さを読出用レーザ光の波長の1/8又は1/4と
すれば、光の位相関係によりへこみからの反射光
が非常に小さくなることは周知のとおりである。
弱いレーザ光を照射してへこみ形成部と非形成部
からの反射の強さの差を検出して情報の読出しを
行うものである。また、本発明のエネルギービー
ム記録用媒体は、熱可塑性樹脂層が記録層と基板
を兼ねることができ、従来技術において不可欠で
あつた記録層の担体としての基板の必要性をなく
することができる。 The present invention utilizes thermoplastic deformation, ie, indentation, of the irradiated area due to beam irradiation as an energy beam recording medium. When a thermoplastic resin is irradiated with an energy beam such as a laser beam, the irradiated part is deformed by the applied heat and becomes a dent. To reproduce information, a weak laser beam is irradiated and the reflected light is detected, so the surface of the medium must have some degree of reflectivity, and many thermoplastic resins are nearly transparent. Therefore, a thin metal film layer of several tens of nanometers is provided on the surface of a thermoplastic resin as a recording medium. When this medium is irradiated with a laser beam, the medium is dented by the heat applied to the metal layer or resin layer, and the depth of the dent can be changed depending on the intensity of the irradiated laser beam. Therefore, the intensity of the laser beam can be adjusted during information recording, and the depth of the recess can be set to 1/8 or 1/4 of the wavelength of the reading laser beam. It is well known that if the depth of the dent is set to 1/8 or 1/4 of the wavelength of the reading laser beam, the reflected light from the dent becomes very small due to the phase relationship of the light.
Information is read by irradiating a weak laser beam and detecting the difference in intensity of reflection from the dent-formed portion and the non-dent-formed portion. Furthermore, in the energy beam recording medium of the present invention, the thermoplastic resin layer can serve as both the recording layer and the substrate, eliminating the need for a substrate as a carrier for the recording layer, which was essential in the conventional technology. .
熱可塑性樹脂としてはアクリル，ポリスチレ
ン，ポリエチレン，ポリアミド等があり金属とし
てはアルミニユーム，金，チタン，白金等があ
る。 Thermoplastic resins include acrylic, polystyrene, polyethylene, polyamide, etc., and metals include aluminum, gold, titanium, platinum, etc.
第１図は本発明のエネルギービーム記録用媒体
の熱可塑性樹脂に金属を蒸着する蒸着装置の断面
を示す概略図である。この蒸着装置の中に表面を
十分に洗浄し、ごみ，汚れ等を落した例えば直径
300mm厚さ５mmのアクリル円盤１を取付け真空度
を10-4〜10-5パスカル（Pa）にする。アクリル円
盤を上部のモータ２により180rpmで回転させな
がらタングステンボート３から例えばアルミニユ
ームを30nm蒸着させる。膜厚はシヤツタ４を開
閉することにより制御する。第２図は本発明のエ
ネルギービーム記録用媒体を用いたレーザ光によ
る情報の記録再生装置の一例を示す。アルゴンレ
ーザ源５より送出された波長488nmの光は光変調
器６を通つてパルス状に変調される。この光が対
物レンズ７を通つて直径１μｍ以下のスポツトに
集光され記録用媒体８上に照射され、その時発す
る熱により熱可塑性樹脂が約61nmへこみ記録用
媒体８上に情報が記録される。読出しは弱いアル
ゴンレーザ光を照射すると記録用媒体８上のへこ
みではアルゴンレーザ光の反射光は減衰するので
反射光の差を光検知器９により検出する。ハーフ
ミラー１０は光源５の光は全反射するが記録用媒
体８よりの反射光は透過する。第３図は本発明の
エネルギービーム記録用媒体が蒸着によつて形成
された断面を示すもので熱可塑性樹脂例えばアク
リル板１２の上に30nmの金属層例えばアルミニ
ユーム層１１が蒸着されている。第４図は第３図
に示した記録用媒体にレーザ光を照射して情報を
記録した時の断面図を示す。レーザ光の照射部１
３は印加された熱により形成された凹部である。
該凹部の深さはレーザ光の波長の１／８又は１／４とな
つて
いる。凹部の深さがレーザ光の１／８の場合はＳ／Ｎ
はビデオ信号で37dBであり情報記録用媒体とし
て十分使用出来る値である。 FIG. 1 is a schematic diagram showing a cross section of a vapor deposition apparatus for vapor depositing metal onto a thermoplastic resin of an energy beam recording medium of the present invention. In this vapor deposition equipment, the surface is sufficiently cleaned to remove dust, dirt, etc.
Attach an acrylic disk 1 of 300 mm and 5 mm thickness and set the degree of vacuum to 10 -4 to 10 -5 Pascal (Pa). While the acrylic disk is rotated at 180 rpm by the motor 2 on the top, aluminum, for example, is evaporated to a thickness of 30 nm from the tungsten boat 3. The film thickness is controlled by opening and closing the shutter 4. FIG. 2 shows an example of an information recording and reproducing apparatus using a laser beam using the energy beam recording medium of the present invention. Light with a wavelength of 488 nm emitted from the argon laser source 5 is modulated into pulses through the optical modulator 6. This light passes through the objective lens 7 and is condensed into a spot with a diameter of 1 μm or less and irradiated onto the recording medium 8. The heat generated at that time dents the thermoplastic resin by about 61 nm and information is recorded on the recording medium 8. For reading, when a weak argon laser beam is irradiated, the reflected light of the argon laser beam is attenuated in the depressions on the recording medium 8, so the difference in the reflected light is detected by the photodetector 9. The half mirror 10 totally reflects the light from the light source 5, but transmits the reflected light from the recording medium 8. FIG. 3 shows a cross section of the energy beam recording medium of the present invention formed by vapor deposition, in which a 30 nm metal layer, such as an aluminum layer 11, is vapor-deposited on a thermoplastic resin, such as an acrylic plate 12. FIG. 4 shows a cross-sectional view of the recording medium shown in FIG. 3 when information is recorded by irradiating the recording medium with a laser beam. Laser light irradiation part 1
3 is a recess formed by the applied heat.
The depth of the recess is 1/8 or 1/4 of the wavelength of the laser beam. When the depth of the recess is 1/8 of the laser beam, the S/N ratio is 37 dB for a video signal, which is a value that can be used as an information recording medium.
以上説明した如く本発明は熱可塑性樹脂の円盤
に金属を蒸着して金属薄膜層を構成することによ
りレーザ光線を用いて情報の記録を行い、記録時
よりははるかに弱いエネルギーのレーザ光線を照
射することで情報の再成が可能となる。 As explained above, the present invention records information using a laser beam by vapor depositing metal on a thermoplastic resin disk to form a metal thin film layer, and irradiates the laser beam with much weaker energy than that used during recording. This allows the information to be regenerated.
第１図は本発明のエネルギービーム記録用媒体
の熱可塑性樹脂に金属を蒸着する蒸着装置の断面
図である。第２図は本発明のエネルギービーム記
録用媒体を用いたレーザ光による情報の記録再生
装置の一例である。第３図は本発明のエネルギー
ビーム記録用媒体が蒸着により形成された断面図
で第４図は第３図に示した記録用媒体にレーザ光
を照射して情報を記録した時の断面図である。
１はアクリル円盤、２はモータ、３はタングス
テンボート、４はシヤツタ、５はアルゴンレーザ
源、６は光変調器、７は対物レンズ、８は記録用
媒体、９は光検知器、１０はハーフミラー。
FIG. 1 is a sectional view of a vapor deposition apparatus for vapor depositing metal onto the thermoplastic resin of the energy beam recording medium of the present invention. FIG. 2 is an example of an information recording and reproducing apparatus using a laser beam using the energy beam recording medium of the present invention. Fig. 3 is a cross-sectional view of the energy beam recording medium of the present invention formed by vapor deposition, and Fig. 4 is a cross-sectional view of the recording medium shown in Fig. 3 when information is recorded by irradiating the recording medium with a laser beam. be. 1 is an acrylic disk, 2 is a motor, 3 is a tungsten boat, 4 is a shutter, 5 is an argon laser source, 6 is an optical modulator, 7 is an objective lens, 8 is a recording medium, 9 is a photodetector, 10 is a half mirror.
Claims (1)
可塑性材料層の上面に密着付設された光反射性材
料層をもつて記録用媒体を構成し、エネルギービ
ームを照射して照射部において、光反射性材料層
密着のまま、熱可塑性変形による凹部を形成させ
ることにより情報を記録し、弱いエネルギービー
ムを照射して該凹部形成部と非形成部からの反射
強度の差を検知することにより情報を再生するよ
う構成したことを特徴とするエネルギービーム記
録用媒体。1. A recording medium is constituted by a thermoplastic material layer that also serves as a substrate and a recording layer, and a light-reflecting material layer closely attached to the upper surface of the thermoplastic material layer, and an energy beam is irradiated to produce a light beam in the irradiation area. Information is recorded by forming recesses through thermoplastic deformation while the reflective material layer remains in close contact with the reflective material layer, and information is recorded by irradiating a weak energy beam and detecting the difference in reflection intensity from the areas where the recesses are formed and the areas where the recesses are not formed. An energy beam recording medium characterized in that it is configured to reproduce.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP55135600A JPS5760543A (en) | 1980-09-29 | 1980-09-29 | Recording medium for energy beam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP55135600A JPS5760543A (en) | 1980-09-29 | 1980-09-29 | Recording medium for energy beam |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5760543A JPS5760543A (en) | 1982-04-12 |
| JPS6255221B2 true JPS6255221B2 (en) | 1987-11-18 |
Family
ID=15155601
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP55135600A Granted JPS5760543A (en) | 1980-09-29 | 1980-09-29 | Recording medium for energy beam |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5760543A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05224109A (en) * | 1992-02-14 | 1993-09-03 | Kyocera Corp | Production of image device |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62219247A (en) * | 1986-03-20 | 1987-09-26 | Canon Inc | Optical recording medium and optical recording method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5210102A (en) * | 1975-07-15 | 1977-01-26 | Canon Inc | Recording medium |
| JPS5232931A (en) * | 1975-09-09 | 1977-03-12 | Fuji Heavy Ind Ltd | Method for coating joint surfaces of two parts |
| JPS5555448A (en) * | 1978-10-19 | 1980-04-23 | Philips Nv | Record carrier |
-
1980
- 1980-09-29 JP JP55135600A patent/JPS5760543A/en active Granted
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5210102A (en) * | 1975-07-15 | 1977-01-26 | Canon Inc | Recording medium |
| JPS5232931A (en) * | 1975-09-09 | 1977-03-12 | Fuji Heavy Ind Ltd | Method for coating joint surfaces of two parts |
| JPS5555448A (en) * | 1978-10-19 | 1980-04-23 | Philips Nv | Record carrier |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05224109A (en) * | 1992-02-14 | 1993-09-03 | Kyocera Corp | Production of image device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5760543A (en) | 1982-04-12 |
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