JPH0687126B2 - Optical recording medium - Google Patents
Optical recording mediumInfo
- Publication number
- JPH0687126B2 JPH0687126B2 JP61143698A JP14369886A JPH0687126B2 JP H0687126 B2 JPH0687126 B2 JP H0687126B2 JP 61143698 A JP61143698 A JP 61143698A JP 14369886 A JP14369886 A JP 14369886A JP H0687126 B2 JPH0687126 B2 JP H0687126B2
- Authority
- JP
- Japan
- Prior art keywords
- optical recording
- recording medium
- photosensitive layer
- light
- photosensitive
- 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 - Fee Related
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M5/00—Duplicating or marking methods; Sheet materials for use therein
- B41M5/26—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used
- B41M5/30—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used using chemical colour formers
- B41M5/323—Organic colour formers, e.g. leuco dyes
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Non-Silver Salt Photosensitive Materials And Non-Silver Salt Photography (AREA)
- Optical Record Carriers And Manufacture Thereof (AREA)
- Heat Sensitive Colour Forming Recording (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は光記録媒体に関する。TECHNICAL FIELD The present invention relates to an optical recording medium.
〔発明の概要〕 本発明は、光記録媒体において、 特定のインドリノスピロベンゾチオピラン化合物と高分
子物質とナフテン酸金属塩とを主成分とした感光性組成
物からなる感光層が紫外線を照射されて発色状態となっ
た後、熱処理されていることにより、 発色画像を熱的にも可視光に対しても安定であることが
できるようにしたものである。SUMMARY OF THE INVENTION According to the present invention, in an optical recording medium, a photosensitive layer composed of a specific indinospirobenzothiopyran compound, a polymeric material and a metal naphthenate metal salt as a main component is irradiated with ultraviolet rays. After being formed into a color-developed state and then heat-treated, the color-developed image can be made stable both thermally and to visible light.
紫外線に感応し、発色画像を形成するものとして、フォ
トクロミズムを示す物質がある。フォトクロミズムを示
す有機物質のうちで最もよく検討されているものにスピ
ロピラン化合物がある。スピロピラン化合物を実際の感
光材料として用いる場合、一般にスピロピラン化合物は
高分子物質即ちバインダ樹脂中に分散、溶解され、フィ
ルム状とされるか、又は基板に塗布されて用いられる。
このような従来の感光材料は紫外線に照射されると発色
し、加熱されるか又は可視光に照射されると元の無色状
態に戻る性質を有している。スピロピラン化合物を用い
たフォトクロミック感光材料はこのような興味ある特性
を示すために、各種記録記憶材料、複写材料、表示材料
などへの応用が試みられてきた。As a substance that is sensitive to ultraviolet rays and forms a colored image, there is a substance exhibiting photochromism. Among the organic substances exhibiting photochromism, the most well-studied one is a spiropyran compound. When the spiropyran compound is used as an actual light-sensitive material, the spiropyran compound is generally dispersed and dissolved in a polymer substance, that is, a binder resin to be formed into a film or applied on a substrate.
Such a conventional light-sensitive material has a property of developing a color when irradiated with ultraviolet rays and returning to an original colorless state when heated or irradiated with visible light. Photochromic photosensitive materials using spiropyran compounds have been tried to be applied to various recording memory materials, copying materials, display materials and the like in order to exhibit such interesting characteristics.
しかしながら、前記した従来の感光材料は、その光発色
した状態が熱的に不安定であり、常温でも徐々に退色し
て長期保存には不適当であり、又、光特に可視光に照射
されても発色状態は失われ、従って例えば発色画像の長
期保存には可視光を遮断する必要がある。さらに又、従
来の感光材料を用いた光記録媒体を、その発色画像を拡
大投影して映し出すような用途に利用しようとする場
合、光源からの光で画像が短時間のうちに退色し、消失
してしまうという問題があった。このために、従来のス
ピロピラン化合物を用いた光記録媒体はその応用面で限
界があった。However, the above-described conventional light-sensitive material is thermally unstable in its photo-colored state, is gradually discolored even at room temperature and is unsuitable for long-term storage, and is also exposed to light, particularly visible light. However, the coloring state is lost, and thus it is necessary to block visible light, for example, for long-term storage of the coloring image. Furthermore, when an optical recording medium using a conventional photosensitive material is to be used for the purpose of enlarging and projecting a color-developed image, the light from the light source causes the image to fade and disappear in a short time. There was a problem of doing. Therefore, the conventional optical recording medium using the spiropyran compound is limited in its application.
前記の問題点を解決するため、本発明者らは鋭意研究の
結果、従来の光記録媒体では得られなかった高い熱安定
性を有し、可視光に対して安定な発色画像を形成した光
記録媒体を開発するに至った。即ち、本発明は、 一般式（Ｉ） （式中、R1,R2及びR3はそれぞれ水素原子、ハロゲン原
子、炭素数１〜５のアルコキシメチル基、ヒドロキシメ
チル基又はアルキルアミノメチル基を意味する）で示さ
れるインドリノスピロベンゾチオピラン化合物と高分子
物質とナフテン酸金属塩とを主成分とした感光性組成物
から成る感光層によって光記録媒体の記録層が構成さ
れ、この感光層が紫外線を照射されて発色状態となった
後、熱処理されていることを特徴とする光記録媒体を提
供するものである。In order to solve the above-mentioned problems, the inventors of the present invention have earnestly studied, and as a result, a light having a high thermal stability, which is not obtained in the conventional optical recording medium, and forming a stable colored image with respect to visible light is formed. We have developed a recording medium. That is, the present invention has the general formula (I) (In the formula, R 1 , R 2 and R 3 respectively represent a hydrogen atom, a halogen atom, an alkoxymethyl group having 1 to 5 carbon atoms, a hydroxymethyl group or an alkylaminomethyl group). A recording layer of an optical recording medium is constituted by a photosensitive layer composed of a photosensitive composition containing a pyran compound, a polymer substance and a metal salt of naphthenic acid as main components, and the photosensitive layer is irradiated with ultraviolet rays to be in a colored state. The present invention provides an optical recording medium characterized by being heat-treated later.
前記高分子物質としては、前記一般式（Ｉ）の化合物と
の相溶性がよくかつフィルム形成能の優れたものであれ
ばよく、その例を挙げれば、ポリメタクリル酸メチル、
ポリスチレン、ポリ酢酸ビニル、ポリビニルブチラー
ル、酢酸セルロース、ポリ塩化ビニル、ポリ塩化ビニリ
デン、塩化ビニル−塩化ビニリデン共重合体、塩化ビニ
ル−酢酸ビニル共重合体、ポリプロピレン、ポリエチレ
ン、ポリアクリロニトリル、ウレタン樹脂、エポキシ樹
脂、ポリエステル、フェノール樹脂、フエノキシ樹脂な
どである。このうち、特に含塩素高分子物質及びフェノ
ール樹脂が好ましく使用される。The polymer substance may be one having good compatibility with the compound of the general formula (I) and excellent film-forming ability. Examples thereof include polymethylmethacrylate,
Polystyrene, polyvinyl acetate, polyvinyl butyral, cellulose acetate, polyvinyl chloride, polyvinylidene chloride, vinyl chloride-vinylidene chloride copolymer, vinyl chloride-vinyl acetate copolymer, polypropylene, polyethylene, polyacrylonitrile, urethane resin, epoxy resin , Polyester, phenolic resin, phenoxy resin and the like. Of these, a chlorine-containing polymer substance and a phenol resin are particularly preferably used.
前記ナフテン酸金属塩としてはZn、Pb、Mn、Co、Ni、Cu
といった金属の塩を用いることができる。The metal salt of naphthenic acid is Zn, Pb, Mn, Co, Ni, Cu.
Such metal salts can be used.
ナフテン酸金属塩の量は前記高分子物質100重量部に対
して10〜50重量部とするのが好ましく、10重量部未満で
は発色画像の安定効果が小さく、50重量部をこえても安
定効果がさらに増大することがない。The amount of the metal salt of naphthenic acid is preferably 10 to 50 parts by weight with respect to 100 parts by weight of the polymer substance, if less than 10 parts by weight the stabilizing effect of the color image is small, even if it exceeds 50 parts by weight. Will not increase further.
前記熱処理のための温度と時間は、前記感光性組成物に
よって異なるが、80℃〜120℃で数十分間〜数時間の条
件を用いることができる。The temperature and time for the heat treatment vary depending on the photosensitive composition, but a condition of 80 ° C. to 120 ° C. for several tens of minutes to several hours can be used.
前記感光性組成物において、一般式（Ｉ）で示される化
合物の含有量は高分子物質100重量部に対して20〜120重
量部の範囲で用いることができる。In the photosensitive composition, the content of the compound represented by the general formula (I) may be 20 to 120 parts by weight based on 100 parts by weight of the polymer substance.
前記感光性組成物は、前記一般式（Ｉ）の化合物と前記
高分子物質の他に、ビスフェノールＡといったフェノー
ル類、ヒンダードアミン、ヒンダードフェノール、ニッ
ケル錯体のような抗酸化剤、光安定剤、高分子物質の熱
又は光硬化剤などを含有することができる。The photosensitive composition includes, in addition to the compound of the general formula (I) and the polymeric substance, phenols such as bisphenol A, hindered amines, hindered phenols, antioxidants such as nickel complexes, light stabilizers, and high stabilizers. A heat or light curing agent of a molecular substance may be contained.
前記感光性組成物は当業者には公知の技術により高分子
物質中に溶解されてフィルム状とされ、又は基板上で感
光層に形成される。The photosensitive composition may be dissolved in a polymer material to form a film, or may be formed into a photosensitive layer on a substrate by a technique known to those skilled in the art.
前記基板用物質としては、ポリアクリレート、ポリエチ
レンテレフタレート、セルロースアセテート、ポリカー
ボネート、通常の紙、バライタ紙、ガラス、金属等があ
る。Examples of the substrate material include polyacrylate, polyethylene terephthalate, cellulose acetate, polycarbonate, ordinary paper, baryta paper, glass and metal.
本発明の光記録媒体において、前記感光層の上面又は下
面に、Al,Cr,Ag,Auなどの反射層を設けてもよい。又、
感光層の上面に直接又は反射層を介して保護膜を設けて
よい。In the optical recording medium of the present invention, a reflective layer of Al, Cr, Ag, Au or the like may be provided on the upper surface or the lower surface of the photosensitive layer. or,
A protective film may be provided on the upper surface of the photosensitive layer directly or via a reflective layer.
さらに、基板として紫外線を遮断する物質を使用し、感
光層上に反射層を設けると、感光層の未発色部がもはや
紫外線に照射されても発色しなくなるので、発色画像が
破壊されることがなく、感光層の発色部と未発色部との
高いコントラストを長期間保存する上で好ましい。Furthermore, if a material that blocks ultraviolet rays is used as the substrate and a reflective layer is provided on the photosensitive layer, the uncolored portion of the photosensitive layer will no longer develop color even when it is exposed to ultraviolet rays, which may destroy the colored image. However, it is preferable for long-term storage of a high contrast between the colored portion and the uncolored portion of the photosensitive layer.
本発明の光記録媒体の構成は例えば第２図〜第４図に示
す積層構造とすることができる。The structure of the optical recording medium of the present invention may be, for example, the laminated structure shown in FIGS.
第２図において、基板１上に感光層２が設けられてい
る。感光層２の上に更に保護膜４が設けられていてもよ
い。In FIG. 2, a photosensitive layer 2 is provided on a substrate 1. A protective film 4 may be further provided on the photosensitive layer 2.
第３図において、基板１上に反射層３が設けられてお
り、反射層３の上に感光層２が設けられている。感光層
２の上に更に保護膜４が設けられていてもよく、また、
反射層３と感光層２の積層順序を逆にしてもよい。In FIG. 3, the reflective layer 3 is provided on the substrate 1, and the photosensitive layer 2 is provided on the reflective layer 3. A protective film 4 may be further provided on the photosensitive layer 2, and
The order of stacking the reflective layer 3 and the photosensitive layer 2 may be reversed.
第４図において、基板１上に感光層２が設けられてお
り、感光層２の上に反射層３が設けられており、反射層
３の上に更に保護膜４が設けられている。In FIG. 4, the photosensitive layer 2 is provided on the substrate 1, the reflective layer 3 is provided on the photosensitive layer 2, and the protective film 4 is further provided on the reflective layer 3.
次に本発明を実施例によって詳述する。 Next, the present invention will be described in detail by way of examples.
実施例１〜４及び比較例１ 本実施例ではインドリノスピロベンゾチオピラン化合物
として式（II） で示されるスピロピラン化合物を用い、以下の組成で溶
液を調製した。Examples 1 to 4 and Comparative Example 1 In this example, an indinospirobenzothiopyran compound represented by the formula (II) Using the spiropyran compound represented by, a solution was prepared with the following composition.
スピロピラン化合物 50重量部 フェノール樹脂（PSK−2320、群栄化学製） 100重量部 ナフテン酸金属塩 30重量部 溶剤（テトラヒドロフラン：シクロヘキサノン ＝1:1） 600重量部 次にこの溶液をメンブレンフィルターでろ過（フィルタ
ー孔径:0.45μｍ）後、2,000rpmで15秒間ガラス基板に
塗布して膜厚約１μｍの感光層を形成し、更に80℃で２
時間乾燥して光記録媒体用試料を得た。なお、ナフテン
酸金属塩としてナフテン酸亜鉛、ナフテン酸鉛、ナフテ
ン酸マンガン、及びナフテン酸コバルトを用いて光記録
媒体用試料をそれぞれ作成した。また、比較例として、
ナフテン酸金属塩を用いない外は上記と同様の方法で光
記録媒体用試料を作成した。Spiropyran compound 50 parts by weight Phenolic resin (PSK-2320, manufactured by Gunei Chemical Industry Co., Ltd.) 100 parts by weight Metal naphthenate salt 30 parts by weight Solvent (tetrahydrofuran: cyclohexanone = 1: 1) 600 parts by weight Next, this solution is filtered through a membrane filter ( (Filter pore size: 0.45 μm), and then apply it to a glass substrate at 2,000 rpm for 15 seconds to form a photosensitive layer with a film thickness of about 1 μm.
The sample was dried for an hour to obtain a sample for an optical recording medium. Samples for optical recording media were prepared using zinc naphthenate, lead naphthenate, manganese naphthenate, and cobalt naphthenate as metal naphthenates. Also, as a comparative example,
A sample for an optical recording medium was prepared in the same manner as above except that the metal salt of naphthenic acid was not used.
次に、これらの光記録媒体用試料に、フィルター（UV−
D33S＋Ｒ−25S、東芝ガラス製）を通して500W超高圧水
銀灯により約５分間紫外光照射して発色させ、更に、90
℃で１時間熱処理して光記録媒体が得られた（第２図参
照）。Next, a filter (UV-
D33S + R-25S, made by TOSHIBA GLASS Co., Ltd.), irradiate ultraviolet light for about 5 minutes with a 500W ultra-high pressure mercury lamp to develop color.
An optical recording medium was obtained by heat treatment at 1 ° C. for 1 hour (see FIG. 2).
紫外光照射前、紫外光照射後かつ熱処理前、及び熱処理
後のこれらの光記録媒体用試料の吸収スペクトル及び波
長660nmでの吸光度をそれぞれ第１図及び第１表に示
す。The absorption spectra and the absorbance at a wavelength of 660 nm of these samples for optical recording media before irradiation with ultraviolet light, after irradiation with ultraviolet light and before heat treatment, and after heat treatment are shown in FIG. 1 and Table 1, respectively.
次に、Ｙ−50フィルター（東芝ガラス製）を用いてこれ
らの光記録媒体に500nmより長波長の可視光を150mW/cm2
の強度で照射して光安定性を調べた。この結果を第１表
に示す。Next, visible light having a wavelength longer than 500 nm was irradiated to these optical recording media at 150 mW / cm 2 using a Y-50 filter (made by Toshiba Glass).
The light stability was investigated by irradiating with the intensity of. The results are shown in Table 1.
ここで光安定性は吸光度が0.1低下するのに要する時間
で表わした。 Here, the photostability is represented by the time required for the absorbance to decrease by 0.1.
第１表から、ナフテン酸金属塩を用いない場合は、吸光
度が0.1変化するために必要な露光時間が約10分である
のに対し、ナフテン酸金属塩を用いるとその露光時間は
60分であり、光安定性が大幅に向上することがわかる。From Table 1, when the naphthenic acid metal salt is not used, the exposure time required for the absorbance to change 0.1 is about 10 minutes, whereas when the naphthenic acid metal salt is used, the exposure time is
It is 60 minutes, which shows that the light stability is significantly improved.
本実施例の各光記録媒体を50℃で１ケ月放置したが、吸
光度の低下はいずれも10％以内に抑えられた。また、本
実施例において、ナフテン酸金属塩としてナフテン酸ニ
ッケル又はナフテン酸銅も有効であった。Each optical recording medium of this example was allowed to stand at 50 ° C. for one month, but the decrease in absorbance was suppressed to within 10%. In addition, in this example, nickel naphthenate or copper naphthenate was also effective as the metal salt of naphthenic acid.
実施例５〜７及び比較例２ インドリノスピロベンゾチオピラン化合物として式（II
I） で示される化合物を用い、実施例１及び比較例１と同様
の組成及び操作で試料を作成し、実施例１と同様の方法
で、この試料にマスクを介して紫外光を５分間照射し、
更に95℃で１時間熱処理して発色部（露光部）と未発色
部（未露光部）とを有する光記録媒体を得た。Examples 5 to 7 and Comparative Example 2 Indolinospirobenzothiopyran compounds of formula (II
I) Using the compound represented by the above, a sample was prepared with the same composition and operation as in Example 1 and Comparative Example 1, and this sample was irradiated with ultraviolet light for 5 minutes through a mask in the same manner as in Example 1,
Further, it was heat-treated at 95 ° C. for 1 hour to obtain an optical recording medium having a colored portion (exposed portion) and an uncolored portion (unexposed portion).
次にこの光記録媒体の発色画像の安定性を調べるため、
この光記録媒体にAlを蒸着し、次いで、このAl蒸着膜上
に紫外線硬化樹脂H05123U（藤倉化成製）を塗布し、更
に紫外光を照射して保護膜とした光記録媒体をそれぞれ
作成した（第４図参照）。次にこれら光記録媒体を60℃
で１ケ月保存した場合の波長660nmにおける反射率変化
を調べた。この結果を第２表に示す。Next, to check the stability of the color image of this optical recording medium,
Al was vapor-deposited on this optical recording medium, and then an ultraviolet curable resin H05123U (manufactured by Fujikura Kasei Co., Ltd.) was applied onto the Al vapor-deposited film, and further ultraviolet light was irradiated to form optical recording media as protective films ( (See FIG. 4). Next, these optical recording media
The change in reflectance at a wavelength of 660 nm when stored for 1 month was examined. The results are shown in Table 2.
第２表から、本実施例の光記録媒体は60℃で１ケ月放置
しても発色部、未発色部とも殆ど反射率変化がみられ
ず、熱的に安定であることがわかる。 It can be seen from Table 2 that the optical recording medium of this example is thermally stable with almost no change in reflectance observed in both the color-developed portion and the non-color-developed portion even when left at 60 ° C. for 1 month.
実施例８ インドリノスピロベンゾチオピラン化合物として実施例
５で用いた式（III）のスピロピランを用い、ナフテン
酸金属塩としてナフテン酸コバルトを用い、以下の組成
からなる溶液を調製し、実施例１と同様の方法でこの溶
液を黄色のアクリル板に塗布し乾燥して約1.5μｍの厚
さの感光層を有する試料を得た。Example 8 A solution having the following composition was prepared by using the spiropyran of the formula (III) used in Example 5 as the indolinospyrobenzothiopyran compound and cobalt naphthenate as the metal salt of naphthenate, and then preparing Example 1 This solution was applied to a yellow acrylic plate and dried in the same manner as in 1. to obtain a sample having a photosensitive layer having a thickness of about 1.5 μm.
スピロピラン化合物 100重量部 ナフテン酸コバルト 40重量部 フェノール樹脂（PSK−2320、群栄化学製） 100重量部 シクロヘキサノン 600重量部 次に、画像を有するマスクを通して、この感光層に紫外
光を照射して、画像を感光層に転写した。この試料を95
℃で40分熱処理した後、画像が転写された感光層上にAl
反射層を蒸着した。次いで実施例２の方法でAl反射層に
保護膜を被着して光記録媒体が得られた（第４図参
照）。Spiropyran compound 100 parts by weight Cobalt naphthenate 40 parts by weight Phenolic resin (PSK-2320, Gunei Chemical Industry Co., Ltd.) 100 parts by weight Cyclohexanone 600 parts by weight Next, this photosensitive layer is irradiated with ultraviolet light through a mask having an image, The image was transferred to the photosensitive layer. 95 this sample
After heat treatment at 40 ℃ for 40 minutes, Al is applied on the photosensitive layer where the image is transferred.
A reflective layer was deposited. Then, an Al recording layer was coated with a protective film by the method of Example 2 to obtain an optical recording medium (see FIG. 4).
こうして得られた光記録媒体の反射率を、波長632.8nm
及びビーム径１μｍのHe−Neレーザ光で測定したとこ
ろ、発色部と未発色部の反射率はそれぞれ４％と73％で
あり、高いコントラストが得られたことが判明した。The reflectance of the optical recording medium thus obtained was measured at a wavelength of 632.8 nm.
When measured with a He-Ne laser beam having a beam diameter of 1 μm, the reflectances of the colored portion and the uncolored portion were 4% and 73%, respectively, which revealed that high contrast was obtained.
本実施例の光記録媒体では、記録層としての感光層が紫
外線遮断性アクリル基板とAl反射層との間に挾まれてい
るので、紫外光がこの光記録媒体に照射されても感光層
の未発色部は発色せず、従って記録パターンが破壊され
ることはない。In the optical recording medium of this example, since the photosensitive layer as the recording layer is sandwiched between the ultraviolet blocking acrylic substrate and the Al reflective layer, even if the ultraviolet ray is radiated to this optical recording medium, the photosensitive layer The uncolored portion does not develop color, and therefore the recording pattern is not destroyed.
また、本実施例の光記録媒体は前記各実施例の光記録媒
体と同様、熱及び光、特に可視光に対して安定であっ
て、420nm以上の波長の可視光（光強度200mW/cm2）を20
時間照射してもコントラストの実質的低下がみられなか
った。一方、比較のため、ナフテン酸金属塩を用いない
で同様にして得られた光記録媒体では、約20分の可視光
照射で発色部の反射率が４％から18％に変化し、コント
ラストが著しく低下した。本実施例の光記録媒体では、
20時間の可視光照射でも発色部の反射率は４％から10％
に変化したにすぎなかった。Further, the optical recording medium of the present example is stable to heat and light, particularly visible light, as in the optical recording medium of each of the above examples, visible light having a wavelength of 420 nm or more (light intensity 200 mW / cm 2 ) 20
No substantial decrease in contrast was observed even after irradiation for a long time. On the other hand, for comparison, in the optical recording medium obtained in the same manner without using the metal naphthenate, the reflectance of the color-developed portion was changed from 4% to 18% by irradiation with visible light for about 20 minutes, and the contrast was changed. Remarkably decreased. In the optical recording medium of this example,
Even when irradiated with visible light for 20 hours, the reflectance of the colored area is 4% to 10%
It just changed to.
本発明の光記録媒体は、ある特定のインドリノスピロベ
ンゾチオピラン化合物と高分子物質とナフテン酸金属塩
とを主成分とした感光性組成物からなる感光層が紫外線
を照射されて発色状態となった後、熱処理されているよ
うにしている。In the optical recording medium of the present invention, a photosensitive layer made of a photosensitive composition mainly containing a specific indolinospyrobenzothiopyran compound, a polymer substance and a metal salt of naphthenic acid is irradiated with ultraviolet rays to form a colored state. After that, it is being heat treated.
このため、従来のスピロピラン系感光材料の欠点であっ
た発色画像の熱不安定性及び可視光不安定性が改善され
た感光性組成物を提供することができ、本発明の光記録
媒体を、長期保存安定性が要求される記録記憶材料、複
写材料に用いることができ、又、可視光を照射して拡大
投影するディスプレイの分野にも利用できる。Therefore, it is possible to provide a photosensitive composition in which thermal instability and visible light instability of a color image, which were the drawbacks of conventional spiropyran-based photosensitive materials, are improved, and the optical recording medium of the present invention can be stored for a long period of time. It can be used as a recording and storage material and a copying material that are required to have stability, and can also be used in the field of a display that irradiates visible light and magnifies and projects.
また、本発明の光記録媒体において、感光性組成物は粒
子性をもたず、スピロピラン分子そのものが変化するた
め、紫外線で微小ドットを記録する際、高解像度で記録
することができる。また、本発明の光記録媒体の発色部
は600〜700nmの波長域で強い吸収を示すため、この波長
域で発振するレーザ又は発光ダイオードを用いて発色パ
ターンを読み出すことができ、従って、光カード等に用
いることができる。Further, in the optical recording medium of the present invention, since the photosensitive composition does not have a particle property and the spiropyran molecule itself changes, it is possible to perform recording with high resolution when minute dots are recorded with ultraviolet rays. Further, since the coloring portion of the optical recording medium of the present invention exhibits strong absorption in the wavelength range of 600 to 700 nm, it is possible to read the coloring pattern by using a laser or a light emitting diode which oscillates in this wavelength range, and therefore an optical card. Etc. can be used.
第１図は実施例１における光記録媒体の吸収スペクトル
を示すグラフ、第２図〜第４図は本発明の光記録媒体の
構成を示す図である。 なお図面に用いた符号において、 １……基板 ２……感光層 である。FIG. 1 is a graph showing the absorption spectrum of the optical recording medium in Example 1, and FIGS. 2 to 4 are diagrams showing the configuration of the optical recording medium of the present invention. In the reference numerals used in the drawings, 1 ... Substrate 2 ... Photosensitive layer.
Claims (1)
子、炭素数１〜５のアルコキシメチル基、ヒドロキシメ
チル基又はアルキルアミノメチル基を意味する）で示さ
れるインドリノスピロベンゾチオピラン化合物と高分子
物質とナフテン酸金属塩とを主成分とした感光性組成物
から成る感光層によって光記録媒体の記録層が構成さ
れ、この感光層が紫外線を照射されて発色状態となった
後、熱処理されていることを特徴とする光記録媒体。1. A general formula (In the formula, R 1 , R 2 and R 3 respectively represent a hydrogen atom, a halogen atom, an alkoxymethyl group having 1 to 5 carbon atoms, a hydroxymethyl group or an alkylaminomethyl group). A recording layer of an optical recording medium is constituted by a photosensitive layer composed of a photosensitive composition containing a pyran compound, a polymer substance and a metal salt of naphthenic acid as main components, and the photosensitive layer is irradiated with ultraviolet rays to be in a colored state. An optical recording medium characterized by being heat-treated later.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61143698A JPH0687126B2 (en) | 1986-06-19 | 1986-06-19 | Optical recording medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61143698A JPH0687126B2 (en) | 1986-06-19 | 1986-06-19 | Optical recording medium |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62299386A JPS62299386A (en) | 1987-12-26 |
| JPH0687126B2 true JPH0687126B2 (en) | 1994-11-02 |
Family
ID=15344883
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61143698A Expired - Fee Related JPH0687126B2 (en) | 1986-06-19 | 1986-06-19 | Optical recording medium |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0687126B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5164287A (en) * | 1990-02-17 | 1992-11-17 | Mitsubishi Denki Kabushiki Kaisha | Photochromic material and rewritable optical recording medium |
| AUPR496501A0 (en) * | 2001-05-14 | 2001-06-07 | Swinburne University Of Technology | Method and device |
| JP2008176039A (en) * | 2007-01-18 | 2008-07-31 | Ricoh Co Ltd | Image display medium, image forming method and device |
-
1986
- 1986-06-19 JP JP61143698A patent/JPH0687126B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62299386A (en) | 1987-12-26 |
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