JPH0562192A - Method of recording optical information recording medium - Google Patents

Method of recording optical information recording medium

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Publication number
JPH0562192A
JPH0562192A JP25276891A JP25276891A JPH0562192A JP H0562192 A JPH0562192 A JP H0562192A JP 25276891 A JP25276891 A JP 25276891A JP 25276891 A JP25276891 A JP 25276891A JP H0562192 A JPH0562192 A JP H0562192A
Authority
JP
Japan
Prior art keywords
recording
light
organic dye
optical
light source
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
Application number
JP25276891A
Other languages
Japanese (ja)
Inventor
Yoshihiro Ogawa
善広 小川
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Canon Inc
Original Assignee
Canon Inc
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Canon Inc filed Critical Canon Inc
Priority to JP25276891A priority Critical patent/JPH0562192A/en
Publication of JPH0562192A publication Critical patent/JPH0562192A/en
Pending legal-status Critical Current

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  • Optical Recording Or Reproduction (AREA)

Abstract

PURPOSE:To obtain a recording pit whose optical stability is good. CONSTITUTION:A recording operation is executed to an optical information recording medium 3 provided with an organic pigment recording layer 4 which contains an optical stabilizer 5 while the organic pigment recording layer 4 is irradiated with two beams of light which are emitted from the following: a light source 11 provided with a wavelength near the maximum absorption wavelength (lambdamax) of an organic pigment; and a light source 12 provided with a wavelength near the lambdamax of the optical stabilizer. It is promoted by means of the respective beams of light that the organic pigment and the optical stabilizer are decomposed optically and pyrolyzed, and recording pits whose optical stability are good can be formed.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、2種の光源を用いた光
学的情報記録媒体の記録方法に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording method for an optical information recording medium using two types of light sources.

【0002】[0002]

【従来の技術】従来、有機色素からなる記録層を有する
貼り合わせタイプの光学的情報記録媒体としては、図3
に示す様に、基板2の上に、光吸収剤5を含有する有機
色素記録層4を設け、その有機色素記録層4の上に保護
基板10を接着剤6を用いて貼り合わせた構成のものが
知られている。
2. Description of the Related Art Conventionally, as a pasting type optical information recording medium having a recording layer made of an organic dye, FIG.
As shown in FIG. 3, the organic dye recording layer 4 containing the light absorbing agent 5 is provided on the substrate 2, and the protective substrate 10 is bonded onto the organic dye recording layer 4 with the adhesive 6. Things are known.

【0003】これらの有機色素記録層4は、レーザビー
ム1の照射を受け、その吸収率に応じて熱エネルギーを
発生し、ヒートモードによって記録層が溶融又は昇華
し、従来知られている様に、図4に示される形状の記録
ピットが形成される。さらに、図4に示される様に、溶
融した色素が基板内に拡散して記録ピット部15が形成
される。特に、図4に示される様な記録ピット部15の
形成は、光カード記録媒体の様な比較的記録レーザエネ
ルギーが低い場合、例えば半導体レーザ光パワーが3〜
7mW、光ビーム径が3〜5μm、レーザ照射時間が1
0〜100μsec程度の場合に顕著に現われる。
These organic dye recording layers 4 are irradiated with the laser beam 1 and generate thermal energy in accordance with the absorptance thereof, and the recording layers are melted or sublimated by the heat mode, as is conventionally known. , A recording pit having the shape shown in FIG. 4 is formed. Further, as shown in FIG. 4, the molten dye diffuses in the substrate to form the recording pit portion 15. Particularly, when the recording pit portion 15 as shown in FIG. 4 is formed, when the recording laser energy is relatively low as in the optical card recording medium, for example, the semiconductor laser light power is 3 to.
7 mW, light beam diameter 3-5 μm, laser irradiation time 1
It appears remarkably in the case of about 0 to 100 μsec.

【0004】そして、さらに有機色素記録層内に光安定
剤又はスタビライザーを添加した場合、記録層の記録感
度が低下して、図4に示される様な記録ピットの形成が
促進される。
When a light stabilizer or stabilizer is further added to the organic dye recording layer, the recording sensitivity of the recording layer is lowered and the formation of recording pits as shown in FIG. 4 is promoted.

【0005】[0005]

【発明が解決しようとする課題】また、本発明者の研究
の結果、光カードの様な光安定剤を含有する有機色素を
記録層として用いた密着構造の光記録媒体において、ス
ポット径3μm程度、かつレーザパワー3〜7mWのレ
ーザ光を用いて記録を行なう場合では、レーザ光で生じ
る熱エネルギーが、記録スポットの中心部では有機色素
記録層が完全に分解脱色されているが、記録ピットの周
辺部では、図4に示される様に、有機色素は反射能を有
する脱色途中の有機色素9となって存在する。しかしな
がら、基板に拡散した有機色素8が反射能を持たず、光
吸収能を有する、いわゆる光学フィルターとして働くた
めに、記録ビット部15の反射率bは低くなり、非記録
部の反射率aとの差から得られる下式の記録コントラス
トが0.4以上となり十分な情報記録信号になりうる。
As a result of the research conducted by the present inventor, in an optical recording medium having a close contact structure using an organic dye containing a light stabilizer as a recording layer, such as an optical card, the spot diameter is about 3 μm. In addition, when recording is performed using a laser beam with a laser power of 3 to 7 mW, the heat energy generated by the laser beam causes the organic dye recording layer to be completely decomposed and decolorized at the center of the recording spot, but In the peripheral portion, as shown in FIG. 4, the organic dye is present as the organic dye 9 in the course of bleaching which has reflectivity. However, since the organic dye 8 diffused on the substrate does not have the reflectivity but functions as a so-called optical filter having the light absorption capability, the reflectance b of the recording bit portion 15 becomes low and the reflectance a of the non-recording portion becomes a. The recording contrast of the following formula obtained from the difference of 0.4 becomes 0.4 or more, and a sufficient information recording signal can be obtained.

【0006】[0006]

【数1】 [Equation 1]

【0007】しかしながら、図4に示される様な記録ピ
ット部15において、基板に拡散した有機色素8は、脱
色途中の有機色素9と比較して、太陽光又は情報再生レ
ーザ光による光劣化が速い。
However, in the recording pit portion 15 as shown in FIG. 4, the organic dye 8 diffused on the substrate is photodegraded by sunlight or information reproducing laser light faster than the organic dye 9 in the process of decolorization. ..

【0008】したがって、記録ピット部に連続又は断続
的に太陽光又は情報の再生レーザ光が照射されると、相
対的に基板に拡散した有機色素8が脱色途中の有機色素
9よりも光劣化が速いために速く脱色し、基板に拡散し
た有機色素8のフィルター効果が小さくなる。その結
果、記録ピット部の反射率bは大きくなり、下式の記録
コントラストの値が小さくなる。したがって、記録・再
生信号の信頼性が低下することが問題となっている。
Therefore, when the recording pit portion is continuously or intermittently irradiated with sunlight or reproducing laser light for information, the organic dye 8 relatively diffused to the substrate is more deteriorated than the organic dye 9 in the process of being decolorized. Since it is fast, the color is rapidly decolorized, and the filter effect of the organic dye 8 diffused on the substrate becomes small. As a result, the reflectance b of the recording pit portion becomes large, and the value of the recording contrast in the following equation becomes small. Therefore, there is a problem that the reliability of the recording / reproducing signal is lowered.

【0009】[0009]

【数1】 [Equation 1]

【0010】上記の様な記録ピットの耐光性を向上させ
るためには、光記録時に記録ピット部での色素の分解を
十分に行なえばよいが、単純に記録レーザ光のパワーを
増加させると、それに伴なって再生レーザパワーも増加
し、再生による光劣化等が速くなる問題を引きおこす。
In order to improve the light resistance of the recording pit as described above, it is sufficient to sufficiently decompose the dye in the recording pit portion during optical recording, but if the power of the recording laser light is simply increased, Along with that, the reproduction laser power also increases, causing a problem that photodegradation due to reproduction is accelerated.

【0011】本発明は、この様な従来技術の欠点を改善
するためになされたものであり、光安定性の良好な記録
ピットを得ることができる光学的情報記録媒体の記録方
法を提供することを目的とするものである。
The present invention has been made to solve the above-mentioned drawbacks of the prior art, and provides a recording method for an optical information recording medium capable of obtaining recording pits having good light stability. The purpose is.

【0012】[0012]

【課題を解決するための手段】即ち、本発明は、光安定
剤を含有する有機色素記録層を有する光学的情報記録媒
体の記録方法において、有機色素の最大吸収波長近傍の
波長を有する光源および光安定剤の最大吸収波長近傍の
波長を有する光源から発生する2つの光を有機色素記録
層に照射して記録することを特徴とする光学的情報記録
媒体の記録方法である。
That is, the present invention provides a recording method of an optical information recording medium having an organic dye recording layer containing a light stabilizer, and a light source having a wavelength near the maximum absorption wavelength of the organic dye. A recording method for an optical information recording medium, characterized in that the organic dye recording layer is recorded by irradiating the organic dye recording layer with two lights generated from a light source having a wavelength near the maximum absorption wavelength of the light stabilizer.

【0013】以下、本発明を詳細に説明する。本発明
は、光安定剤を含有する有機色素記録層を有する光学的
情報記録媒体において、該有機色素記録層の有機色素の
最大吸収波長近傍の波長を有する光源と、光安定剤の最
大吸収波長近傍の波長を有する光源から発する2つの光
を同時に記録層に照射して光記録する2光源記録方法で
ある。
The present invention will be described in detail below. The present invention provides an optical information recording medium having an organic dye recording layer containing a light stabilizer, a light source having a wavelength in the vicinity of the maximum absorption wavelength of the organic dye of the organic dye recording layer, and a maximum absorption wavelength of the light stabilizer. This is a dual light source recording method in which two lights emitted from light sources having wavelengths in the vicinity are simultaneously irradiated to the recording layer to perform optical recording.

【0014】この様な本発明の記録方法を用いることに
よって、有機色素記録層の光記録部の有機色素および光
安定剤の光・熱分解が十分促進され、光安定性にすぐれ
た記録ピットを効率よく得ることが可能となる。
By using the recording method of the present invention as described above, the photo-thermal decomposition of the organic dye and the light stabilizer in the optical recording portion of the organic dye recording layer is sufficiently promoted, and a recording pit excellent in light stability is formed. It is possible to obtain it efficiently.

【0015】本発明における有機色素記録層に用いられ
る有機色素としては、特に制限はなく光記録媒体に使用
されている広範囲のものを用いることができ、例えば下
記の構造式および表1に示すものが挙げられる。
The organic dye used in the organic dye recording layer in the present invention is not particularly limited, and a wide range of dyes used in optical recording media can be used. For example, those shown in the following structural formula and Table 1 Is mentioned.

【0016】[0016]

【化1】 [Chemical 1]

【0017】[0017]

【化2】 [Chemical 2]

【0018】[0018]

【化3】 [Chemical 3]

【0019】[0019]

【化4】 [Chemical 4]

【0020】[0020]

【化5】 [Chemical 5]

【0021】[0021]

【化6】 [Chemical 6]

【0022】[0022]

【表1】 [Table 1]

【0023】(注) (1)εはモル吸光係数を示す。 (2)塗膜の厚さは500〜1000Åである。(Note) (1) ε represents a molar absorption coefficient. (2) The thickness of the coating film is 500 to 1000Å.

【0024】また、有機色素記録層に含有される光安定
剤としては、特に制限はなく有機記録媒体に使用されて
いる広範囲のものを用いることができ、例えば下記の構
造式および表2に示すものが挙げられる。
The light stabilizer contained in the organic dye recording layer is not particularly limited and a wide range of light stabilizers used in organic recording media can be used. For example, the following structural formulas and Table 2 are shown. There are things.

【0025】[0025]

【化7】 [Chemical 7]

【0026】[0026]

【化8】 [Chemical 8]

【0027】[0027]

【表2】 [Table 2]

【0028】すなわち、表1に示される様に、従来、光
記録媒体として用いられている有機色素のλmaxは7
20〜870nmである。また、表2に示される様に、
光安定剤のλmaxは870〜1200nmである。し
たがって、光記録時に有機色素のλmax近傍の光源だ
けで記録した場合には、光記録部での光安定剤の光・熱
分解速度は比較的遅くなる。したがって、記録レーザ光
照射部に存在する光安定剤のために、記録ピット部の有
機色素の光安定性が高く、十分に有機色素が光・熱分解
した記録ピットが得られない。
That is, as shown in Table 1, λmax of the organic dye conventionally used as an optical recording medium is 7
20 to 870 nm. Also, as shown in Table 2,
The light stabilizer has a λmax of 870 to 1200 nm. Therefore, when optical recording is performed with only a light source near the λmax of the organic dye, the light / thermal decomposition rate of the light stabilizer in the optical recording portion becomes relatively slow. Therefore, due to the light stabilizer existing in the recording laser light irradiation portion, the light stability of the organic dye in the recording pit portion is high, and the recording pit in which the organic dye is sufficiently photo-thermally decomposed cannot be obtained.

【0029】本発明の2光源を用いる記録方法において
は、光安定剤は、光安定剤のλmaxの波長を有する光
によって光励起し、光・熱分解が促進する。その結果、
記録ピット部での光安定剤の有効成分の量は減少し、同
時に照射した有機色素のλmaxの波長を有する光によ
る色素記録層の光・熱分解が促進する。その結果、図2
に示される様な記録ピットが形成される。
In the recording method using the two light sources of the present invention, the light stabilizer is photoexcited by light having a wavelength of λmax of the light stabilizer to promote photo-thermal decomposition. as a result,
The amount of the effective component of the light stabilizer in the recording pit portion is reduced, and the photo-thermal decomposition of the dye recording layer by the light having the wavelength of λmax of the organic dye simultaneously irradiated is accelerated. As a result,
Recording pits as shown in are formed.

【0030】図2において、記録ピットの中央部には、
有機色素が十分に光・熱分解した色素完全分解脱色部1
3が形成される。この様な図2に示される様な記録ピッ
トの再生信号の耐光・耐久性は、図4に示される従来の
記録ピットと比較して約2倍〜5倍良好であった。
In FIG. 2, in the center of the recording pit,
Decolorization part 1 where the organic dye is fully photo and thermal decomposed
3 is formed. The light resistance / durability of the reproduction signal of the recording pit as shown in FIG. 2 was about 2 to 5 times better than that of the conventional recording pit shown in FIG.

【0031】図2に示される、本発明の記録方法により
形成された記録ピット部においては、色素完全分解脱色
部13の量が多く、有機色素の未分解部の脱色途中の有
機色素9aおよび界面光吸収フィルター部の基板に拡散
した有機色素8aの存在量は、図4に示される従来の記
録ピットに比較して十分小さくなっている。また完全に
分解した色素が基板に拡散した部分8bは、光吸収フィ
ルターとしての働きは、ほとんど認められない。
In the recording pit portion formed by the recording method of the present invention shown in FIG. 2, the amount of the dye completely decomposed and decolorized portion 13 is large, and the organic dye 9a and the interface in the middle of decolorization of the undecomposed portion of the organic dye. The amount of the organic dye 8a diffused in the substrate of the light absorption filter portion is sufficiently smaller than that of the conventional recording pit shown in FIG. Further, the portion 8b in which the completely decomposed dye is diffused on the substrate hardly functions as a light absorption filter.

【0032】図1は本発明の光学的情報記録媒体の記録
方法の一例を示す模式図である。同図1においては、2
光源が用いられ、光源11は有機色素のλmax近傍の
波長を有する有機色素吸収レーザ光源、光源12は光安
定剤のλmax近傍の波長を有する光安定剤吸収レーザ
光源を示す。3はカード状の光学的情報記録媒体を示
す。14はピックアップレンズを示す。レーザビーム光
11aと12aは軸ずらし光学系を用いて、光吸収剤5
を含有する有機色素記録層4に同時に照射させる。ただ
し、レーザビーム光12aのパルス幅が数μsec以内
であれば、レーザビーム光12aをレーザビーム光11
aよりも時間的に速く有機色素記録層4の面に照射して
も良い。
FIG. 1 is a schematic view showing an example of a recording method of the optical information recording medium of the present invention. In FIG. 1, 2
A light source is used, a light source 11 is an organic dye absorption laser light source having a wavelength near λmax of an organic dye, and a light source 12 is a light stabilizer absorption laser light source having a wavelength near λmax of a light stabilizer. Reference numeral 3 denotes a card-shaped optical information recording medium. Reference numeral 14 represents a pickup lens. The laser beam lights 11a and 12a are made by using an optical system that is off-axis to
The organic dye recording layer 4 containing the is simultaneously irradiated. However, if the pulse width of the laser beam light 12 a is within several μsec, the laser beam light 12 a is changed to the laser beam light 11 a.
The surface of the organic dye recording layer 4 may be irradiated with time faster than a.

【0033】前記の表1および表2に、本発明に用いる
代表的な有機色素のλmaxと光安定剤のλmaxを示
したが、これらの有機色素のλmax近傍の記録光源1
1としては、例えば波長780nmおよび830nmの
半導体レーザを用いることができる。
Tables 1 and 2 above show λmax of typical organic dyes and λmax of light stabilizers used in the present invention. The recording light source 1 near the λmax of these organic dyes is shown.
As 1, laser diodes having wavelengths of 780 nm and 830 nm can be used, for example.

【0034】光安定剤のλmax近傍の記録光源12と
しては、例えば波長1170nmの半導体レーザ、波長
1053nmのNd;YLFレーザを用いることができ
る。または、波長1200nm及び1300nmの半導
体レーザを用いることができる。
As the recording light source 12 in the vicinity of λmax of the light stabilizer, for example, a semiconductor laser having a wavelength of 1170 nm and an Nd; YLF laser having a wavelength of 1053 nm can be used. Alternatively, semiconductor lasers with wavelengths of 1200 nm and 1300 nm can be used.

【0035】これらの半導体レーザは、通常市販されて
いるもので十分利用できる。
As these semiconductor lasers, commercially available ones can be sufficiently used.

【0036】[0036]

【実施例】以下、実施例を示し本発明をさらに具体的に
説明する。
EXAMPLES The present invention will be described more concretely with reference to the following examples.

【0037】実施例1 注形成形によってプリフォーマットを形成した、厚さ
0.4mmのポリメチルメタクリレート(PMMA)基
板のプリフォーマット形成表面上に、表1のNo.4の
構造を有するポリメチン色素と表2の光安定剤IRG−
027を3:1の割合で含有する光記録層を溶媒塗布法
によって形成した。色素と光安定剤の溶媒にはジアセト
ンアルコールを用いた。溶媒塗布は固形分3.0wt%
の溶液を用いて、グラビアコーターで行ない、厚さ0.
09μmの光記録層を形成した。
Example 1 No. 1 in Table 1 was formed on a preformat-formed surface of a 0.4 mm-thick polymethylmethacrylate (PMMA) substrate preformed by the casting method. A polymethine dye having a structure of 4 and a light stabilizer IRG of Table 2
An optical recording layer containing 027 in a ratio of 3: 1 was formed by a solvent coating method. Diacetone alcohol was used as the solvent for the dye and the light stabilizer. Solvent coating solid content 3.0 wt%
Gravure coater was used to obtain a thickness of 0.
An optical recording layer of 09 μm was formed.

【0038】次に、光記録層上にエチレン−酢酸ビニル
共重合体(EVA)系接着剤(ヒロダイン7580、又
は日本マタイエルファンOH506)を用いて、0.3
mm厚のPMMAからなる保護基板を積層して図3に示さ
れる様な光記録媒体を得た。
Next, an ethylene-vinyl acetate copolymer (EVA) adhesive (Hirodyne 7580 or Nippon Materfan OH506) was used to form 0.3 on the optical recording layer.
A protective substrate made of PMMA having a thickness of mm was laminated to obtain an optical recording medium as shown in FIG.

【0039】図1に示す方法により、得られた光記録媒
体に、3μmのスポットで、パルス幅25μsec、カ
ード移動速度120mm/secの条件で、有機色素吸
収レーザ光源11として830nmの半導体レーザ,レ
ーザパワー3.5mW、および光安定剤吸収レーザ光源
12として波長1053nmのNd:YLFレーザ,レ
ーザパワー2.0mWを用いて2光源記録を行なったと
ころ、再生信号のコントラスト0.65の安定した記録
ピットが得られた。再生レーザパワーは0.2mWであ
る。(再生スピードはすべて400mm/secであ
る。)再生光劣化、すなわち記録コントラストの変化は
フェードメータテストによって10%以内であった。
According to the method shown in FIG. 1, an optical recording medium obtained by the method shown in FIG. 1 has a spot of 3 μm, a pulse width of 25 μsec, and a card moving speed of 120 mm / sec. When two light source recordings were performed using a power of 3.5 mW, a Nd: YLF laser having a wavelength of 1053 nm as the light stabilizer absorbing laser light source 12, and a laser power of 2.0 mW, stable recording pits with a reproduction signal contrast of 0.65 were obtained. was gotten. The reproduction laser power is 0.2 mW. (The reproducing speed is all 400 mm / sec.) The deterioration of the reproducing light, that is, the change of the recording contrast was within 10% by the fade meter test.

【0040】フェードメータ試験の条件は 光源;キセノンアークランプ 25KW ランプパワー 47mW/cm2 温度 40〜45℃ 時間 250hr である。The conditions of the fade meter test are: light source; xenon arc lamp 25 kW, lamp power 47 mW / cm 2 temperature 40 to 45 ° C., time 250 hr.

【0041】比較例1 比較例として実施例1で得られた光記録媒体を、半導体
レーザ830nmだけの1光源を用い、レーザパワー
3.5mW、スポット径3μm、パルス幅25μse
c、カード移動速度120mm/secの条件で記録し
たところ、再生信号のコントラストは0.45であっ
た。再生レーザパワーは0.2mWである。
Comparative Example 1 As a comparative example, the optical recording medium obtained in Example 1 was used with one light source of only semiconductor laser 830 nm, laser power 3.5 mW, spot diameter 3 μm, pulse width 25 μse.
When recorded under the conditions of c and card moving speed of 120 mm / sec, the contrast of the reproduced signal was 0.45. The reproduction laser power is 0.2 mW.

【0042】フェードメータ試験による記録コントラス
トの変化は、初期値に対して25〜30%であった。
The change in recording contrast by the fade meter test was 25 to 30% of the initial value.

【0043】比較例2 実施例1で得られた光記録媒体を、半導体レーザ830
nmだけの1光源を用いて、3μmのスポット径、パル
ス幅25μsec、カード媒体移動速度120mm/s
ec、レーザパワー5.5mWで記録したところ、記録
コントラストは0.57であった。
Comparative Example 2 A semiconductor laser 830 was used as the optical recording medium obtained in Example 1.
Spot diameter of 3 μm, pulse width of 25 μsec, card medium moving speed of 120 mm / s using one light source of only nm
When recorded with ec and a laser power of 5.5 mW, the recording contrast was 0.57.

【0044】ただし、再生レーザパワーが0.3mWに
なったため、再生光劣化が再生レーザパワー0.2mW
時の約2倍になってしまった。
However, since the reproducing laser power became 0.3 mW, the deterioration of the reproducing light was due to the reproducing laser power of 0.2 mW.
It's about twice the time.

【0045】実施例2 実施例1の光安定剤を、表2の光安定剤IRG−012
に変えた以外は、実施例1と同様に光カード状記録媒体
を作成した。
Example 2 The light stabilizer of Example 1 was added to the light stabilizer of Table 2 IRG-012.
An optical card-shaped recording medium was prepared in the same manner as in Example 1 except that the above was changed to.

【0046】得られた光記録媒体を有機色素吸収レーザ
光源11として、830nmの半導体レーザ、レーザパ
ワー3.5mW、パルス幅50μsec、スポット径3
μm、カード記録媒体移動速度120mm/sec、か
つ光安定剤吸収レーザ光源12として、波長1200n
mの半導体レーザ、レーザパワー2.0mW、パルス幅
50μsec、スポット径3μmの2光源記録を行なっ
たところ、記録コントラストは0.68の安定した記録
ピットが得られた。
The obtained optical recording medium was used as an organic dye absorption laser light source 11, a semiconductor laser of 830 nm, laser power 3.5 mW, pulse width 50 μsec, spot diameter 3
μm, the card recording medium moving speed is 120 mm / sec, and the light stabilizer absorbing laser light source 12 has a wavelength of 1200 n.
When two-source recording with a semiconductor laser of m, a laser power of 2.0 mW, a pulse width of 50 μsec and a spot diameter of 3 μm was performed, stable recording pits with a recording contrast of 0.68 were obtained.

【0047】フェードメータ試験による記録コントラス
トの変化は10%以内であった。
The change in recording contrast by the fade meter test was within 10%.

【0048】比較例3 実施例2で得られた光記録媒体を半導体レーザ830n
mだけの光源を用い、レーザパワー3.5mW、スポッ
ト径3.0μm、パルス幅25μsec、カード記録媒
体移動速度120mm/sec、で記録したところ、再
生信号コントラストは0.45であった。
Comparative Example 3 The semiconductor laser 830n was used as the optical recording medium obtained in Example 2.
When the recording was performed using a light source of only m, a laser power of 3.5 mW, a spot diameter of 3.0 μm, a pulse width of 25 μsec, and a card recording medium moving speed of 120 mm / sec, the reproduction signal contrast was 0.45.

【0049】フェードメータ試験による記録コントラス
トの変化は、初期値に対して20〜25%であった。
The change in recording contrast by the fade meter test was 20 to 25% of the initial value.

【0050】比較例4 実施例2で得られた光記録媒体を半導体レーザ830n
mだけの光源を用い、レーザパワー5.5mW、スポッ
ト径3.0μm、パルス幅25μsec、カード記録媒
体移動速度120mm/secで記録したところ、再生
信号のコントラストは0.58であった。
Comparative Example 4 The semiconductor laser 830n was used as the optical recording medium obtained in Example 2.
When recording was performed using a light source of m only with a laser power of 5.5 mW, a spot diameter of 3.0 μm, a pulse width of 25 μsec, and a card recording medium moving speed of 120 mm / sec, the reproduction signal contrast was 0.58.

【0051】ただし、再生レーザパワーが0.3mWに
なったため、再生光劣化速度が実施例2、および比較例
4における再生レーザパワー0.2mWと比較して約2
倍になる欠点が生じた。
However, since the reproduction laser power became 0.3 mW, the reproduction light deterioration rate was about 2 as compared with the reproduction laser power of 0.2 mW in Example 2 and Comparative Example 4.
The doubled defect occurred.

【0052】[0052]

【発明の効果】以上説明した様に、本発明の有機色素の
最大吸収波長近傍の波長を有する光源および光安定剤の
最大吸収波長近傍の波長を有する光源から発生する2つ
の光を使用した記録方法を用いることによって、 記録ピット部の再生信号の記録コントラストは、単
純に1光源のレーザパワーを高くしたときよりも大き
く、安定となる。 記録ピット部の光安定性は、1光源を用いた場合と
比較して1.5〜3倍程度良好となる。 などの優れた効果が得られる。
As described above, recording using two lights generated from a light source having a wavelength near the maximum absorption wavelength of the organic dye of the present invention and a light source having a wavelength near the maximum absorption wavelength of the light stabilizer. By using the method, the recording contrast of the reproduction signal in the recording pit portion becomes larger and stable than when the laser power of one light source is simply increased. The light stability of the recording pit portion is about 1.5 to 3 times better than the case where one light source is used. Excellent effects such as

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明の光学的情報記録媒体の記録方法の一例
を示す模式図である。
FIG. 1 is a schematic view showing an example of a recording method of an optical information recording medium of the present invention.

【図2】本発明の2光源記録方法で記録した記録ピット
の断面を示す模式図である。
FIG. 2 is a schematic diagram showing a cross section of a recording pit recorded by a two-light source recording method of the present invention.

【図3】従来の光カード状記録媒体の模式的断面図であ
る。
FIG. 3 is a schematic sectional view of a conventional optical card recording medium.

【図4】従来の光カード状記録媒体の記録ピットの部分
拡大模式的断面図である。
FIG. 4 is a partially enlarged schematic sectional view of a recording pit of a conventional optical card recording medium.

【符号の説明】[Explanation of symbols]

1 レーザビーム 2 基板 3 光学的情報記録媒体 4 有機色素記録層 5 光安定剤 6 接着剤 7 凹状プリグルーブ 8,8a 基板に拡散した有機色素 8b 完全分解した色素が基板に拡散した部分 9,9a 脱色途中の有機色素 10 保護基板 11 有機色素吸収レーザ光源 12 光安定剤吸収レーザ光源 11a 11のレーザビーム光 12a 12のレーザビーム光 13 色素完全分解脱色部 14 ピックアップレンズ 1 Laser Beam 2 Substrate 3 Optical Information Recording Medium 4 Organic Dye Recording Layer 5 Light Stabilizer 6 Adhesive 7 Concave Pregroove 8, 8a Organic Dye 8b Diffused on Substrate 8b Part where Completely Degraded Dye Diffuses on Substrate 9, 9a Organic dye in the middle of decolorization 10 Protective substrate 11 Organic dye absorption laser light source 12 Light stabilizer absorption laser light source 11a 11 laser beam light 12a 12 laser beam light 13 Dye complete decomposition decolorization part 14 Pickup lens

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 光安定剤を含有する有機色素記録層を有
する光学的情報記録媒体の記録方法において、有機色素
の最大吸収波長近傍の波長を有する光源および光安定剤
の最大吸収波長近傍の波長を有する光源から発生する2
つの光を有機色素記録層に照射して記録することを特徴
とする光学的情報記録媒体の記録方法。
1. A method for recording an optical information recording medium having an organic dye recording layer containing a light stabilizer, comprising: a light source having a wavelength near the maximum absorption wavelength of the organic dye and a wavelength near the maximum absorption wavelength of the light stabilizer. Generated from a light source having
A recording method for an optical information recording medium, characterized in that the organic dye recording layer is irradiated with two lights for recording.
JP25276891A 1991-09-05 1991-09-05 Method of recording optical information recording medium Pending JPH0562192A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP25276891A JPH0562192A (en) 1991-09-05 1991-09-05 Method of recording optical information recording medium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP25276891A JPH0562192A (en) 1991-09-05 1991-09-05 Method of recording optical information recording medium

Publications (1)

Publication Number Publication Date
JPH0562192A true JPH0562192A (en) 1993-03-12

Family

ID=17242030

Family Applications (1)

Application Number Title Priority Date Filing Date
JP25276891A Pending JPH0562192A (en) 1991-09-05 1991-09-05 Method of recording optical information recording medium

Country Status (1)

Country Link
JP (1) JPH0562192A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8201453B2 (en) 2007-02-28 2012-06-19 Murata Manufacturing Co., Ltd. Medium fatigue detection apparatus and medium fatigue detection method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8201453B2 (en) 2007-02-28 2012-06-19 Murata Manufacturing Co., Ltd. Medium fatigue detection apparatus and medium fatigue detection method

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