JPH0156679B2 - - Google Patents
Info
- Publication number
- JPH0156679B2 JPH0156679B2 JP58144679A JP14467983A JPH0156679B2 JP H0156679 B2 JPH0156679 B2 JP H0156679B2 JP 58144679 A JP58144679 A JP 58144679A JP 14467983 A JP14467983 A JP 14467983A JP H0156679 B2 JPH0156679 B2 JP H0156679B2
- Authority
- JP
- Japan
- Prior art keywords
- optical information
- recording
- information recording
- light
- film
- 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
- 230000003287 optical effect Effects 0.000 claims description 24
- 239000000049 pigment Substances 0.000 claims description 20
- 229920005989 resin Polymers 0.000 claims description 13
- 239000011347 resin Substances 0.000 claims description 13
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims description 7
- 239000010408 film Substances 0.000 description 21
- 239000004065 semiconductor Substances 0.000 description 15
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 description 12
- 238000010521 absorption reaction Methods 0.000 description 12
- 239000000975 dye Substances 0.000 description 7
- 239000000020 Nitrocellulose Substances 0.000 description 5
- CPBQJMYROZQQJC-UHFFFAOYSA-N helium neon Chemical compound [He].[Ne] CPBQJMYROZQQJC-UHFFFAOYSA-N 0.000 description 5
- 229920001220 nitrocellulos Polymers 0.000 description 5
- 230000003595 spectral effect Effects 0.000 description 5
- 239000004372 Polyvinyl alcohol Substances 0.000 description 4
- 229920002451 polyvinyl alcohol Polymers 0.000 description 4
- 239000010409 thin film Substances 0.000 description 4
- QBZIEGUIYWGBMY-FUZXWUMZSA-N (5Z)-5-hydroxyimino-6-oxonaphthalene-2-sulfonic acid iron Chemical compound [Fe].O\N=C1/C(=O)C=Cc2cc(ccc12)S(O)(=O)=O.O\N=C1/C(=O)C=Cc2cc(ccc12)S(O)(=O)=O.O\N=C1/C(=O)C=Cc2cc(ccc12)S(O)(=O)=O QBZIEGUIYWGBMY-FUZXWUMZSA-N 0.000 description 3
- 230000031700 light absorption Effects 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 125000000524 functional group Chemical group 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 229920001225 polyester resin Polymers 0.000 description 2
- 239000004645 polyester resin Substances 0.000 description 2
- GYHNNYVSQQEPJS-UHFFFAOYSA-N Gallium Chemical compound [Ga] GYHNNYVSQQEPJS-UHFFFAOYSA-N 0.000 description 1
- 229920002125 Sokalan® Polymers 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- MDPILPRLPQYEEN-UHFFFAOYSA-N aluminium arsenide Chemical compound [As]#[Al] MDPILPRLPQYEEN-UHFFFAOYSA-N 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 229910052797 bismuth Inorganic materials 0.000 description 1
- JCXGWMGPZLAOME-UHFFFAOYSA-N bismuth atom Chemical compound [Bi] JCXGWMGPZLAOME-UHFFFAOYSA-N 0.000 description 1
- 229920002301 cellulose acetate Polymers 0.000 description 1
- 229920006217 cellulose acetate butyrate Polymers 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 229910052733 gallium Inorganic materials 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 125000000018 nitroso group Chemical group N(=O)* 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 239000004584 polyacrylic acid Substances 0.000 description 1
- 229910052714 tellurium Inorganic materials 0.000 description 1
- PORWMNRCUJJQNO-UHFFFAOYSA-N tellurium atom Chemical compound [Te] PORWMNRCUJJQNO-UHFFFAOYSA-N 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
- 238000001771 vacuum deposition Methods 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
- G11B7/241—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
- G11B7/242—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers
- G11B7/244—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers comprising organic materials only
- G11B7/246—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers comprising organic materials only containing dyes
-
- 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
- G11B7/241—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
- G11B7/242—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers
- G11B7/244—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers comprising organic materials only
- G11B7/249—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers comprising organic materials only containing organometallic compounds
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Thermal Transfer Or Thermal Recording In General (AREA)
- Optical Record Carriers And Manufacture Thereof (AREA)
Description
【発明の詳細な説明】
本発明は光ビームを用いて情報を記録再生する
媒体に関するもので、特に光ビームとして半導体
レーザーを使用して記録を行う媒体に関するもの
である。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a medium for recording and reproducing information using a light beam, and particularly to a medium for recording using a semiconductor laser as the light beam.
従来より、光情報記録膜に光ビームを照射し、
該光ビームの光エネルギーあるいは熱エネルギー
によつて前記光情報記録膜に微小なピツトを形成
し、あるいは透過率、屈折率等の光学的性質の変
化を生ぜしめることにより情報を記録し、次に微
弱な光ビームを情報が記録された前記光情報記録
膜に照射し、上記ピツトあるいは光学的性質変化
部分の光ビーム反射光の反射光量変化あるいは位
相変化を読み取る高密度光情報記録媒体が知られ
ている。 Conventionally, an optical information recording film is irradiated with a light beam,
Information is recorded by forming minute pits in the optical information recording film or by causing changes in optical properties such as transmittance and refractive index using the optical energy or thermal energy of the light beam, and then A high-density optical information recording medium is known in which a weak light beam is irradiated onto the optical information recording film on which information is recorded, and a change in the amount of reflected light or a change in phase of the light beam reflected from the pit or the portion where the optical properties change is read. ing.
前記光ビームは微小面種に高密度のエネルギー
を集束させねばならず、一般にアルゴン（Ar）
やヘリウムネオン（HeNe）等のガスレーザー光
あるいはガリウムアリミニウムヒ素（GaAlAs）
半導体レーザーが使用される。Ar、HeNeレー
ザー光は波長が488nm、633nmの可視光であり半
導体レーザー光は波長が780〜850nmの近赤外光
である。また、ArやHeNeレーザー光は出力が
それぞれ１〜10W、50mWと大きいが、レーザー
管寸法が大きく又レーザー光出力を記録情報信号
で直接変調することができないため変調器を必要
とする。したがつてArやHeNeレーザーを用い
た光情報記録再生装置は大型となる欠点がある。
一方、半導体レーザーは寸法は小さくレーザー出
力を直接記録信号で変調できるが出力が５〜
25mWと小さい。一方前記情報記録膜は、テルル
（Te）、ビスマス（Bi）等の金属、有機無機色素
顔料、金属有機物複合物が用いられる。これらの
うち色素、顔料は波長が450〜750nmの可視光を
吸収し、半導体レーザー光における様な750nm以
上の近赤外光を吸収するものは少ない。したがつ
て色素、顔料を主成分とする記録膜を有する光情
報記録媒体に半導体レーザー光ビームを照射して
情報を記録する場合、記録膜のレーザー光吸収が
小さいため記録に必要な光ビームエネルギーは多
大になるという欠点がある。 The light beam must focus a high density of energy onto the microsurface species and is typically made of argon (Ar).
Gas laser light such as helium neon (HeNe) or gallium aluminium arsenide (GaAlAs)
A semiconductor laser is used. Ar and HeNe laser light is visible light with wavelengths of 488 nm and 633 nm, and semiconductor laser light is near-infrared light with wavelengths of 780 to 850 nm. Further, Ar and HeNe laser beams have large outputs of 1 to 10 W and 50 mW, respectively, but require a modulator because the laser tube size is large and the laser beam output cannot be directly modulated by the recording information signal. Therefore, optical information recording and reproducing devices using Ar or HeNe lasers have the disadvantage of being large.
On the other hand, semiconductor lasers are small in size and can directly modulate the laser output with a recording signal, but the output is
Small at 25mW. On the other hand, for the information recording film, metals such as tellurium (Te) and bismuth (Bi), organic and inorganic dyes and pigments, and metal-organic composites are used. Among these, dyes and pigments absorb visible light with a wavelength of 450 to 750 nm, and few absorb near-infrared light with a wavelength of 750 nm or more, such as in semiconductor laser light. Therefore, when recording information by irradiating a semiconductor laser beam onto an optical information recording medium that has a recording film mainly composed of dyes or pigments, the light beam energy required for recording is low because the laser light absorption of the recording film is small. The disadvantage is that it becomes large.
本発明者らは先にこのような欠点を解消し、半
導体レーザー光を用い、小さい光ビームエネルギ
ーで情報を記録することができる有機色素含有記
録膜光デイスクを特願57−192273号として提案し
た。該光デイスクの特徴は記録膜がナフトールグ
リーンＢおよびポリビニルアルコールを含有する
ことにあつた。ところが、かかるデイスクの記録
膜に含まれる色素ナフトールグリーンＢおよびポ
リビニルアルコールはいずれも水溶性であるので
湿度の高い環境下にさらされると色素あるいは樹
脂が溶出し情報を記録することが不可能になつた
り、あるいはすでに記録された情報を読み出すこ
とが不能になるという欠点がある。 The inventors of the present invention have previously proposed an organic dye-containing recording film optical disk in Patent Application No. 57-192273, which eliminates these drawbacks and uses semiconductor laser light to record information with low light beam energy. . The optical disc was characterized in that the recording film contained naphthol green B and polyvinyl alcohol. However, since the dye naphthol green B and polyvinyl alcohol contained in the recording film of such a disk are both water-soluble, when exposed to a high humidity environment, the dye or resin dissolves, making it impossible to record information. The disadvantage is that it becomes impossible to read information that has already been recorded.
本発明はかゝる欠点を解消するためになされた
もので耐湿性に優れ、半導体レーザー光を使用
し、小さい光ビームエネルギーで情報を記録再生
することができる光情報記録媒体を提供すること
にある。 The present invention was made in order to eliminate such drawbacks, and an object of the present invention is to provide an optical information recording medium that has excellent moisture resistance, uses semiconductor laser light, and can record and reproduce information with small light beam energy. be.
本発明の特徴は、光ビームを用いて情報を記録
再生する光情報記録媒体において、該光情報記録
媒体の記録膜がピグメントグリーンＢおよびOH
基を有する非水溶性樹脂を含有することにある。 A feature of the present invention is that in an optical information recording medium that records and reproduces information using a light beam, the recording film of the optical information recording medium is pigment green B and OH.
The purpose is to contain a water-insoluble resin having a group.
以下本発明について説明する。 The present invention will be explained below.
ピグメントグリーンＢは
で示される構造をもち、水に不溶でケント類、
Ｎ，Ｎジメチルホルムアミド等の有機溶剤に可溶
である。ピグメントグリーンＢのＮ，Ｎジメチル
ホルムアミド溶液の分光吸収特性は第１図実線１
で示されるように最大吸収波長は730nmで780〜
850nmの近赤外域での吸収は小さい。ピグメント
グリーンＢの可視光長波長域における吸収は、発
色団であるニトロソ基の電子共鳴にもとづくもの
である。 Pigment green B is It has the structure shown in , is insoluble in water and is a Kent class,
It is soluble in organic solvents such as N,N dimethylformamide. The spectral absorption characteristics of Pigment Green B in N,N dimethylformamide solution are shown in Figure 1, solid line 1.
As shown in , the maximum absorption wavelength is 730nm and 780~
Absorption in the near-infrared region of 850 nm is small. The absorption of Pigment Green B in the long wavelength range of visible light is based on the electronic resonance of the nitroso group, which is a chromophore.
ピグメントグリーンＢに深色効果のある助色団
を導入すると最大吸収波長を長波長側にシフトさ
せ、半導体レーザー光の波長領域である780〜
850nmの光吸収を増すことができる。従つて水に
対し不溶性のピグメントグリーンＢをレーザー光
吸収色素として用い、さらに前記深色効果を示す
助色団である水酸基（OH基）をもつ非水溶性樹
脂を混合することによつて、ピグメントグリーン
Ｂの最大吸収波長を長波長側に移動させ、半導体
レーザー光に対する吸収を増大させることが出来
る。ピグメントグリーンＢおよび非水溶性樹脂は
いずれも水に対して不溶性であるので多湿環境下
においても色素および樹脂が溶出せず、前述した
ごとき情報の記録再生が損われる欠点を解消する
ことができる。しかも、ピグメントグリーンＢの
半導体レーザー光波長域における光吸収率が樹脂
中のOH基によつて増大させられているので小さ
い光ビームエネルギーで情報を記録再生すること
ができる。 When an auxochrome with a bathochromic effect is introduced into Pigment Green B, the maximum absorption wavelength is shifted to the long wavelength side, which is the wavelength range of semiconductor laser light from 780~
Can increase light absorption at 850nm. Therefore, by using Pigment Green B, which is insoluble in water, as a laser light-absorbing pigment, and further mixing it with a water-insoluble resin having a hydroxyl group (OH group), which is an auxochrome that exhibits the bathochromic effect, pigment By moving the maximum absorption wavelength of green B to the longer wavelength side, it is possible to increase the absorption of semiconductor laser light. Since Pigment Green B and the water-insoluble resin are both insoluble in water, the pigment and resin do not elute even in a humid environment, and the above-mentioned disadvantage of impairing information recording and reproduction can be overcome. Moreover, since the light absorption rate of Pigment Green B in the wavelength range of semiconductor laser light is increased by the OH groups in the resin, information can be recorded and reproduced with small light beam energy.
ここでOH基を有する非水溶性樹脂は官能基全
てがOH基である必要はなく官能基の一部にOH
基があればよい。このような樹脂はニトロセルロ
ース、セルロースアセテート、セルロースアセテ
ートブチレート、ポリエステル樹脂、ポリアクリ
ル酸樹脂の中から選ばれ、これらの樹脂を単独で
用いてもよく、混合して用いることもできる。 Here, in water-insoluble resins having OH groups, not all functional groups need to be OH groups, but some of the functional groups have OH groups.
All you need is a base. Such resins are selected from nitrocellulose, cellulose acetate, cellulose acetate butyrate, polyester resins, and polyacrylic acid resins, and these resins may be used alone or in combination.
次に本発明の実施例について説明する。 Next, examples of the present invention will be described.
実施例 １
厚さ1.2mm直径20mmの両面光学研磨円形ガラス
板にアルミニウム（Al）膜を真空蒸着法で500Å
の膜厚に形成し、更にAl膜上にピグメントグリ
ーンＢとニトロセルロースの混合物からなる記録
薄膜を形成し光情報記録媒体を得た。前記記録薄
膜は以下のようにして作製される。Example 1 An aluminum (Al) film of 500 Å was deposited on a double-sided optically polished circular glass plate with a thickness of 1.2 mm and a diameter of 20 mm using a vacuum evaporation method.
Further, a recording thin film made of a mixture of Pigment Green B and nitrocellulose was formed on the Al film to obtain an optical information recording medium. The recording thin film is produced as follows.
ピグメントグリーンＢ １部
ニトロセルロース １部
Ｎ，Ｎジメチルホルムアミド 50部
上記組成をもつ溶液を高速で回転する前記ガラ
ス板のAl薄膜上に滴下乾燥すると、Al薄膜上に
ピグメントグリーンＢ、ニトロセルロース混合物
記録膜が形成される。このときの分光吸収特性を
第１図実線２に示す。この光情報記録媒体に波長
が830nmのGaAlAs半導体レーザー光を照射した
ところ情報を記録するに必要な最小光ビームエネ
ルギーは67mJ／cm3であつた。この光情報記録媒
体を温度60℃、湿度95％の雰囲気中に100時間放
置したが記録膜には何の変化も認められなかつ
た。本実施例と比較するために、本実施例におけ
る記録膜の代りに水溶性色素ナフトールグリーン
Ｂと水溶性樹脂ポリビニルアルコール（PVA）
からなる記録膜を用いた光情報記録媒体を温度60
℃、湿度95％の雰囲気に100時間放置したところ、
記録膜表面は全面に小さな凹凸が見られ記録レー
ザービームが乱反射レーザービームを用いて情報
を記録することが不可能であつた。 Pigment Green B 1 part Nitrocellulose 1 part N,N dimethylformamide 50 parts When the solution having the above composition is dropped onto the Al thin film of the glass plate rotating at high speed and dried, a mixture of Pigment Green B and nitrocellulose is recorded on the Al thin film. A film is formed. The spectral absorption characteristics at this time are shown by solid line 2 in FIG. When this optical information recording medium was irradiated with GaAlAs semiconductor laser light having a wavelength of 830 nm, the minimum light beam energy necessary to record information was 67 mJ/cm 3 . This optical information recording medium was left in an atmosphere with a temperature of 60°C and a humidity of 95% for 100 hours, but no change was observed in the recording film. For comparison with this example, a water-soluble dye naphthol green B and a water-soluble resin polyvinyl alcohol (PVA) were used instead of the recording film in this example.
An optical information recording medium using a recording film made of
When left in an atmosphere of ℃ and 95% humidity for 100 hours,
Small irregularities were observed all over the surface of the recording film, making it impossible to record information using a diffusely reflected recording laser beam.
実施例 ２
実施例１においてニトロセルロースをポリエス
テル樹脂に代えて光情報記録媒体を作製し、同様
にレーザービームを用いて記録実験をしたところ
必要最小ビームエネルギーは81mJ／cm2であつた。
この光情報記録媒体を温度60℃湿度95％の雰囲気
に100時間放置したところ記録膜表面には何の変
化も見られなかつた。Example 2 An optical information recording medium was prepared by replacing nitrocellulose with polyester resin in Example 1, and a recording experiment was conducted using a laser beam in the same manner, and the required minimum beam energy was 81 mJ/cm 2 .
When this optical information recording medium was left in an atmosphere at a temperature of 60° C. and a humidity of 95% for 100 hours, no change was observed on the surface of the recording film.
以上説明したように、本発明による光情報記録
媒体は、記録膜がピグメントグリーンＢ及びOH
基を有する非水溶性樹脂を含んでいるので多湿環
境下におかれても情報を記録したり、あるいは記
録された情報を再生することが損われることがな
い。又半導体レーザー光の波長領域において該レ
ーザー光の吸収が大きいので半導体レーザーを用
いて低いレーザービームエネルギーで情報を記録
することができる。 As explained above, the optical information recording medium according to the present invention has a recording film of pigment green B and OH.
Since it contains a water-insoluble resin having a group, recording information or reproducing recorded information will not be impaired even if placed in a humid environment. Furthermore, since absorption of semiconductor laser light is large in the wavelength range of semiconductor laser light, information can be recorded with low laser beam energy using a semiconductor laser.
図は本発明の光情報記録媒体記録膜の分光吸収
特性を示す図である。
１…ピグメントグリーンＢ、Ｎ，Ｎジメチルホ
ルムアミド溶液の分光吸収特性、２…本発明の一
実施例の記録膜の分光吸収特性。
The figure is a diagram showing the spectral absorption characteristics of the recording film of the optical information recording medium of the present invention. 1... Spectral absorption characteristics of Pigment Green B, N,N dimethylformamide solution, 2... Spectral absorption characteristics of the recording film of one example of the present invention.
Claims (1)
報記録媒体において、該光情報記録媒体の記録膜
がピグメントグリーンＢおよびOH基を有する非
水溶性樹脂を含有することを特徴とする光情報記
録媒体。1. An optical information recording medium in which information is recorded by light beam irradiation, characterized in that the recording film of the optical information recording medium contains pigment green B and a water-insoluble resin having an OH group. Medium.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58144679A JPS6036188A (en) | 1983-08-08 | 1983-08-08 | Optical information recording medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58144679A JPS6036188A (en) | 1983-08-08 | 1983-08-08 | Optical information recording medium |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6036188A JPS6036188A (en) | 1985-02-25 |
| JPH0156679B2 true JPH0156679B2 (en) | 1989-11-30 |
Family
ID=15367728
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58144679A Granted JPS6036188A (en) | 1983-08-08 | 1983-08-08 | Optical information recording medium |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6036188A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07102044B2 (en) * | 1989-11-14 | 1995-11-08 | 住化カラー株式会社 | Agricultural green film |
| EP0463784B1 (en) * | 1990-06-19 | 1998-10-14 | Canon Kabushiki Kaisha | Optical recording medium, optical recording method, and optical reproducing method |
-
1983
- 1983-08-08 JP JP58144679A patent/JPS6036188A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6036188A (en) | 1985-02-25 |
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