JPH0550757A - Optical recording method - Google Patents
Optical recording methodInfo
- Publication number
- JPH0550757A JPH0550757A JP3240647A JP24064791A JPH0550757A JP H0550757 A JPH0550757 A JP H0550757A JP 3240647 A JP3240647 A JP 3240647A JP 24064791 A JP24064791 A JP 24064791A JP H0550757 A JPH0550757 A JP H0550757A
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- Prior art keywords
- light
- optical recording
- recording
- irradiation
- present
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- Non-Silver Salt Photosensitive Materials And Non-Silver Salt Photography (AREA)
- Manufacturing Optical Record Carriers (AREA)
Abstract
Description
【０００１】[0001]
【発明の技術分野】本発明は蛍光性有機化合物を用いた
新規な光記録方式に関するものである。TECHNICAL FIELD The present invention relates to a novel optical recording system using a fluorescent organic compound.
【０００２】[0002]
【従来技術】従来、有機化合物を用いた光記録媒体は多
数提案されているが、これらの記録媒体による記録原理
は、色素が光を吸収して生じる熱によるビット形成など
記録媒体媒体の形状変化に基づいているものが多い。そ
のためその変化を吸収できるスペーシング層を設けるこ
とが必要になり、記録媒体の構造が複雑となる欠点があ
る。またその原理からみて記録密度にも自ずから制御が
加わることになる。また、ヒートモードであり、形状変
化をおこすだけのエネルギーを必ず必要とするため書き
込みエネルギーを小さく、あるいは照射時間をより短く
することに限界があった。一方、完全にフォトンモード
で書き込みあるいは読み出しをするフォトクロミズムを
利用した方法なども知られているが、保存性が悪いなど
の問題を包含し未だ満足すべきものが得られていないの
が現状である。2. Description of the Related Art Hitherto, many optical recording media using organic compounds have been proposed. The recording principle of these recording media is to change the shape of the recording medium such as bit formation due to heat generated by absorption of light by a dye. Many are based on. Therefore, it is necessary to provide a spacing layer capable of absorbing the change, and there is a drawback that the structure of the recording medium becomes complicated. Further, from the principle, the recording density is naturally controlled. In addition, since it is a heat mode and energy required to change the shape is inevitably required, there is a limit in reducing writing energy or shortening irradiation time. On the other hand, a method utilizing photochromism for completely writing or reading in the photon mode is also known, but the present situation is that a satisfactory one has not yet been obtained due to problems such as poor storability.
【０００３】[0003]
【発明が解決しようとする課題】本発明は比較的容易に
また比較的小さな光エネルギーで記録を書き込むことが
可能な新規な記録方法を提供することを目的とする。SUMMARY OF THE INVENTION It is an object of the present invention to provide a new recording method which allows a record to be written relatively easily and with a relatively small light energy.
【０００４】[0004]
【課題が解決するための手段】本発明者らは蛍光性有機
化合物を含むフィルムに該蛍光性有機化合物の吸収領域
の波長の光を照射することにより照射部の蛍光が顕著に
弱まる現象を見い出した。本発明はかかる知見に基づい
てなされたものである。DISCLOSURE OF THE INVENTION The inventors of the present invention have found that a film containing a fluorescent organic compound is irradiated with light having a wavelength in the absorption region of the fluorescent organic compound, whereby the fluorescence at the irradiated portion is significantly weakened. It was The present invention has been made based on such findings.
【０００５】すなわち、本発明によれば、蛍光性有機化
合物を含む層を記録層として、光照射によってもたらさ
れる光照射部の蛍光強度と光未照射部の蛍光強度の差を
利用することにより情報を記録する方法が提供される。
本発明の光記録方法における消蛍光の機構の詳細は定か
でないが、光照射により何等かの光反応物あるいはエネ
ルギートラップとなる構造が生成するものと思われる。That is, according to the present invention, by using a layer containing a fluorescent organic compound as a recording layer and utilizing the difference between the fluorescence intensity of the light-irradiated portion and the fluorescence intensity of the non-light-irradiated portion, which is caused by light irradiation, information is recorded. A method is provided for recording.
The details of the mechanism of defluorescence in the optical recording method of the present invention are not clear, but it is considered that some kind of photoreactant or a structure serving as an energy trap is generated by light irradiation.
【０００６】このような材料を含む記録層を支持体上に
設け、適当な光量の光照射をし未照射部との間に蛍光発
生量の異なる箇所をつくることにより記録を行なうこと
ができる。またその読み出しは記録時に比べ小量の光を
照射することにより発生する蛍光の量の違いを検出する
ことが可能となる。Recording can be carried out by providing a recording layer containing such a material on a support, irradiating an appropriate amount of light, and forming a portion having a different fluorescence generation amount from the non-irradiated portion. Further, the reading can detect the difference in the amount of fluorescence generated by irradiating a smaller amount of light than that at the time of recording.
【０００７】本発明の光記録方法はフォトンモードであ
るため従来のヒートモードにおける形状変化の場合に比
べ記録時の照射光は小さくてすみ、また記録密度も飛躍
的に上昇する。また比較的強い光を照射することによる
蛍光発生量の減少は極めて著しく、照射前と照射後では
５０％以上の差異が生じる。またそのようなサンプルを
１日以上室内光下においても３０％以上のコントラスト
に保つことができる。もちろん読み出し時以外は光を照
射しなければ長時間の保存に十分耐えられる。Since the optical recording method of the present invention is in the photon mode, the irradiation light at the time of recording can be smaller than that in the case of the shape change in the conventional heat mode, and the recording density can be dramatically increased. Further, the decrease in the amount of fluorescence generated by irradiation with relatively strong light is extremely remarkable, and a difference of 50% or more occurs before and after irradiation. Further, such a sample can be kept at a contrast of 30% or more even under room light for one day or more. Of course, it can withstand storage for a long time unless it is irradiated with light except during reading.
【０００８】本発明の光記録方法の記録原理は以下のよ
うなものである。すなわち、蛍光性有機化合物の吸収の
ある波長の光を蛍光強度変化を起こすに足る充分な光量
だけ光記録媒体に照射し、その箇所の光照射時の蛍光発
生量を未照射部の蛍光発生量に比較して低下させること
により書き込みを行なう。変化した部分（記録部）と未
変化の部分（非記録部）との蛍光発生量の差を光学的手
段により検知することにより記録を読みとる。The recording principle of the optical recording method of the present invention is as follows. That is, the optical recording medium is irradiated with light having a wavelength having absorption of the fluorescent organic compound in an amount sufficient to cause a change in fluorescence intensity, and the amount of fluorescence generated at the time of light irradiation is the amount of fluorescence generated in the non-irradiated portion. Writing is performed by lowering it compared with. The recording is read by detecting the difference in the amount of fluorescence generated between the changed portion (recording portion) and the unchanged portion (non-recording portion) by optical means.
【０００９】本発明の光記録方法は図１のように透過型
の読み取りも可能であるし、図２のように記録層の背後
に反射層を設ければ反射型の読み取りも可能である。The optical recording method of the present invention can perform transmissive reading as shown in FIG. 1, and can also perform reflective reading by providing a reflective layer behind the recording layer as shown in FIG.
【００１０】本発明で用いる光記録媒体は高パワーの光
照射により蛍光発生量が変化するような蛍光性有機化合
物をポリマーマトリックス中に分散した薄膜を基板上に
設けることにより作成される。薄膜形成は蛍光性有機化
合物とポリマーを含む溶液を基板上に塗工することによ
り容易に達成できる。時間とコストのかかる蒸着をしな
くてもよいのも本方法の利点のひとつである。もちろん
蒸着による作製も可能である。The optical recording medium used in the present invention is prepared by providing on a substrate a thin film in which a fluorescent organic compound whose fluorescence generation amount is changed by irradiation with high power light is dispersed in a polymer matrix. Thin film formation can be easily achieved by applying a solution containing a fluorescent organic compound and a polymer onto a substrate. One of the advantages of this method is that it does not require time-consuming and costly deposition. Of course, vapor deposition is also possible.
【００１１】使用するポリマーは特に限定はなく、ポリ
カーボネイト、ポリスチレン、ポリメチル（メタ）アク
リレート、ポリエステル、セルロース、ポリアミド、ポ
リウレタン、エポキシ樹脂等が用いられる。記録層塗工
のために溶媒としては特に制限はなく蛍光性有機化合物
及びポリマーが所望の処方で溶解するものなら全て使用
できる。記録層の膜厚は０．０１〜１００μｍで好まし
くは０．１〜１０μｍである。The polymer used is not particularly limited, and polycarbonate, polystyrene, polymethyl (meth) acrylate, polyester, cellulose, polyamide, polyurethane, epoxy resin and the like are used. The solvent for coating the recording layer is not particularly limited, and any solvent that can dissolve the fluorescent organic compound and polymer in a desired formulation can be used. The thickness of the recording layer is 0.01 to 100 μm, preferably 0.1 to 10 μm.
【００１２】記録層中に含まれる蛍光性有機化合物の濃
度は記録層での書き込み光の波長においての光吸収率が
２０％程度以上あるように設定すればよく、通常０．１
重量％〜１００重量％である。記録層にはまた光反応を
促進するような添加剤も使用可能である。また、本発明
においては、記録層の膜厚を変化させたりあるいは蛍光
性有機化合物の添加量を調製することにより記録媒体の
光吸収箇所を記録層の表面のみにしたりあるいは層の裏
側まで含めたりすることができる。前者においては、書
き込みにより変化をする部分は光照射をした側の表面の
みであるため読み出し光は同じ側からの照射することが
必要であが、この記録方法によれば、デイスクの両面に
記録が可能である。一方、後者においては書き込み光の
反対側から読み出し光の照射も可能である。The concentration of the fluorescent organic compound contained in the recording layer may be set so that the light absorptance at the wavelength of the writing light in the recording layer is about 20% or more, and is usually 0.1.
% To 100% by weight. Additives that accelerate the photoreaction can also be used in the recording layer. Further, in the present invention, by changing the film thickness of the recording layer, or by adjusting the addition amount of the fluorescent organic compound, the light absorption site of the recording medium may be limited to the surface of the recording layer or may be included up to the back side of the layer. can do. In the former case, it is necessary to irradiate the reading light from the same side because the part that changes by writing is only the surface on the side where the light is irradiated. Is possible. On the other hand, in the latter case, the reading light can be emitted from the opposite side of the writing light.
【００１３】本発明の記録媒体に用いられる基板として
は、ガラスや金属の他、ポリエステル、ポリカーボネイ
ト、ポリメチルメタクリレート、ポリビニルクロリド、
エポキシ樹脂、セルロース系樹脂等の有機高分子材料の
フィルムや板が好適である。Substrates used in the recording medium of the present invention include glass, metal, polyester, polycarbonate, polymethylmethacrylate, polyvinyl chloride,
A film or plate made of an organic polymer material such as an epoxy resin or a cellulosic resin is suitable.
【００１４】反射光を利用して読みとる場合にはアルミ
ニウム等の高い反射率を有する金属が好ましい。また、
本発明においては図３に示すように記録層の上部には書
き込み、読み出し光を透過する保護層を設けてもよい。
さらに本発方法によれば、記録したものは室内光下でも
画像情報を読みとることができる。When reading using reflected light, a metal having a high reflectance such as aluminum is preferable. Also,
In the present invention, as shown in FIG. 3, a protective layer that transmits writing and reading light may be provided on the recording layer.
Furthermore, according to the present generating method, the recorded information can be read even under room light.
【００１５】また、本発明における読み取りは蛍光の強
度の違いを利用することから照射前後の色調変化の小さ
いものは（例えば可視域に吸収をもたない材料）室内光
下では全く情報が読み取れないので、紫外線等を照射す
る方法により情報が読み取れるようにすることが必要で
ある。このような記録方法は隠し文字あるいは隠し画像
作製方法としても使用することができる。記録層に用い
る蛍光性化合物としては光照射により蛍光発生量が変化
するようなものならいずれも使用可能であるが、特に本
実施例にあるようなビニレン基を構造式中に含む芳香族
化合物は有効である。Further, since the reading in the present invention utilizes the difference in the intensity of fluorescence, information having a small change in color tone before and after irradiation (for example, a material having no absorption in the visible region) cannot be read under room light. Therefore, it is necessary that the information can be read by the method of irradiating with ultraviolet rays or the like. Such a recording method can also be used as a method for producing a hidden character or a hidden image. As the fluorescent compound used in the recording layer, any one can be used as long as the amount of fluorescence generated by light irradiation is changed, and in particular, an aromatic compound containing a vinylene group in the structural formula as in the present example is It is valid.
【００１６】[0016]
以下、実施例により本発明を更に詳細に説明する。 実施例１ 下記化１で表わされるスチリルスチルベン化合物を１
部、ポリカーホネイト樹脂（帝人製 パンライトＫ１３
００）１部をテトラヒドロフラン８部に溶解しガラス板
上にコーテング塗布し８０℃で２分間、１２０℃で５分
間乾燥し膜厚約２０μｍの記録層を作成した。Hereinafter, the present invention will be described in more detail with reference to Examples. Example 1 A styrylstilbene compound represented by the following chemical formula 1
, Polycarbonate resin (Teijin Panlite K13
(00) 1 part was dissolved in 8 parts of tetrahydrofuran, coated on a glass plate and dried at 80 ° C. for 2 minutes and 120 ° C. for 5 minutes to form a recording layer having a thickness of about 20 μm.
【化１】 これに書き込み光としてスポット径３ミリの２ｍＷの単
色光（４００ｎｍ）を照射した。同一箇所に読み出し光
として単色光（３８０ｎｍ）を照射し蛍光発生量を求め
た。書き込み光照射時間（ｔ）と読み出し光照射時の蛍
光発生量の関係を図４に示した。これは書き込み光照射
による記録層の変化を、読み出し光照射による蛍光発生
量の変化として情報の記録、読み取りが可能であること
を示している。[Chemical 1] This was irradiated with 2 mW monochromatic light (400 nm) having a spot diameter of 3 mm as writing light. Monochromatic light (380 nm) was irradiated as read-out light to the same location to determine the amount of fluorescence generated. FIG. 4 shows the relationship between the writing light irradiation time (t) and the amount of fluorescence generated during the reading light irradiation. This indicates that information can be recorded and read as a change in the recording layer due to irradiation with writing light and a change in the amount of fluorescence generated due to irradiation with reading light.
【００１７】実施例２ 下記化２で表されるα−フェニルスチルベン化合物０．
５部及び下記化３で表わされるスチリルスチルベン化合
物０．５部とポリカーボネイト樹脂（帝人製パンライト
Ｋ１３００）１部をテトラヒドロフラン８部に溶解しガ
ラス板上にコーティング塗布し８０℃で２分間、１２０
℃で５分間乾燥し膜厚約２０μｍの記録層を作成した。Example 2 α-phenylstilbene compound represented by the following chemical formula 2
5 parts and 0.5 part of a styryl stilbene compound represented by the following chemical formula 3 and 1 part of a polycarbonate resin (Panlite K1300 manufactured by Teijin Ltd.) are dissolved in 8 parts of tetrahydrofuran and coated on a glass plate and coated at 80 ° C. for 2 minutes for 120 minutes.
The recording layer was dried at 5 ° C. for 5 minutes to form a recording layer having a thickness of about 20 μm.
【化２】 [Chemical 2]
【化３】 これに書き込み光としてスポット径３ミリの２ｍＷの単
色光（４００ｎｍ）を照射した。同一箇所に読み出し光
として単色光（３８０ｎｍ）を照射し蛍光発生量を求め
た。その結果、蛍光発生量（外部で検知された蛍光強度
の照射光強度に対する割合）は書き込み光照射前後で以
下のように変化した。 照射前：１８％ 照射後： ２％ 即ち照射前後の蛍光強度比は１８：２＝９／１であり情
報の読み出しが可能であった。[Chemical 3] This was irradiated with 2 mW monochromatic light (400 nm) having a spot diameter of 3 mm as writing light. Monochromatic light (380 nm) was irradiated as read-out light to the same location to determine the amount of fluorescence generated. As a result, the fluorescence generation amount (ratio of the fluorescence intensity detected outside to the irradiation light intensity) changed as follows before and after the writing light irradiation. Before irradiation: 18% After irradiation: 2% That is, the fluorescence intensity ratio before and after irradiation was 18: 2 = 9/1, and it was possible to read information.
【００１８】実施例３ 下記化４で表わされるスチルベン化合物１部、ポリカー
ボネイト樹脂（帝人製パンライトｋ１３００）を１部を
テトラヒドロフラン８部に溶解しポリエステルフィルム
上にコーティング塗布し８０℃で２分間、１２０℃で５
分間乾燥し膜厚約２０μｍの記録層を作成した。これに
透明フィルム上に文字情報を書き込んだシート（原図）
を介し５ｍＷ／ｃｍ2の白色光（ハロゲンランプ）を６
０秒間照射した。これは室内光下では全く文字を確認で
きないが、紫外線ランプ（ＴＯＰＣＯＮ社ＰＵＶ−１）
を照射したところ原図の文字部に相当する領域（書き込
み光未照射部）で強い蛍光が観察され、目視で明瞭に文
字情報を読みとることができた。Example 3 1 part of a stilbene compound represented by the following chemical formula 4 and 1 part of a polycarbonate resin (Panlite k1300 manufactured by Teijin Ltd.) were dissolved in 8 parts of tetrahydrofuran and coated on a polyester film, and the mixture was coated at 80 ° C. for 2 minutes for 120 minutes. 5 at ℃
It was dried for a minute to form a recording layer having a film thickness of about 20 μm. A sheet with text information written on it on the transparent film (original drawing)
5mW / cm 2 white light (halogen lamp) through
Irradiate for 0 seconds. This is a UV lamp (TOPCON PUV-1), although no letters can be confirmed under room light.
When irradiated with, the strong fluorescence was observed in the region corresponding to the character part of the original drawing (writing light unirradiated part), and the character information could be clearly read by visual observation.
【化４】 [Chemical 4]
【００１９】[0019]
【発明の効果】本発明の光記録方法は前記構成からなる
ので、比較的容易かつ比較的小さなエネルギーで記録の
書き込みと読み出しが可能となる。Since the optical recording method of the present invention has the above-mentioned structure, it is possible to write and read the record relatively easily and with relatively small energy.
【図１】本発明の光記録方法に用いる代表的な光記録媒
体の模式断面図である。FIG. 1 is a schematic cross-sectional view of a typical optical recording medium used in the optical recording method of the present invention.
【図２】本発明の光記録方法に用いる代表的な他の光記
録媒体の模式断面図である。FIG. 2 is a schematic cross-sectional view of another typical optical recording medium used in the optical recording method of the present invention.
【図３】本発明の光記録方法に用いる更に別な光記録媒
体の模式断面図である。FIG. 3 is a schematic cross-sectional view of still another optical recording medium used in the optical recording method of the present invention.
【図４】実施例１の光記録方法における書き込み光照射
時間と読み出し光照射時の蛍光発生量の関係を表わすグ
ラフである。FIG. 4 is a graph showing a relationship between a writing light irradiation time and a fluorescence generation amount at the time of reading light irradiation in the optical recording method of Example 1.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 安達 浩 東京都大田区中馬込１丁目３番６号 株式 会社リコー内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hiroshi Adachi 1-3-6 Nakamagome, Ota-ku, Tokyo Inside Ricoh Co., Ltd.
Claims (1)
て、光照射によってもたらされる光照射部の蛍光強度と
光未照射部の蛍光強度の差を利用することにより情報を
記録する方法。1. A method of recording information by using a layer containing a fluorescent organic compound as a recording layer and utilizing the difference between the fluorescence intensity of a light-irradiated portion and the fluorescence intensity of a non-irradiated portion, which is brought about by light irradiation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3240647A JPH0550757A (en) | 1991-08-27 | 1991-08-27 | Optical recording method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3240647A JPH0550757A (en) | 1991-08-27 | 1991-08-27 | Optical recording method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0550757A true JPH0550757A (en) | 1993-03-02 |
Family
ID=17062609
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3240647A Pending JPH0550757A (en) | 1991-08-27 | 1991-08-27 | Optical recording method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0550757A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000048177A1 (en) * | 1999-02-12 | 2000-08-17 | Trid Store Ip, L.L.C. | Method of increasing fluorescent signal of optical discs with fluorescent reading |
| EP1036129A4 (en) * | 1997-11-07 | 2000-12-27 | Omd Devices Llc | Fluorescent composition for the manufacture of cd-rom type optical memory disks |
| DE102016002128A1 (en) | 2015-03-02 | 2016-09-08 | Fanuc Corporation | A light beam absorbing optical absorber |
-
1991
- 1991-08-27 JP JP3240647A patent/JPH0550757A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1036129A4 (en) * | 1997-11-07 | 2000-12-27 | Omd Devices Llc | Fluorescent composition for the manufacture of cd-rom type optical memory disks |
| WO2000048177A1 (en) * | 1999-02-12 | 2000-08-17 | Trid Store Ip, L.L.C. | Method of increasing fluorescent signal of optical discs with fluorescent reading |
| DE102016002128A1 (en) | 2015-03-02 | 2016-09-08 | Fanuc Corporation | A light beam absorbing optical absorber |
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