CN1329285A - Photopolymer holographic recording material sesitive to green light and its preparation method - Google Patents
Photopolymer holographic recording material sesitive to green light and its preparation method Download PDFInfo
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- CN1329285A CN1329285A CN 01126357 CN01126357A CN1329285A CN 1329285 A CN1329285 A CN 1329285A CN 01126357 CN01126357 CN 01126357 CN 01126357 A CN01126357 A CN 01126357A CN 1329285 A CN1329285 A CN 1329285A
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Abstract
The present invention relates to a kind of photopolymer holographic recording material sensitive to green light and its preparation method. It is a dry photopolymer film, containing polyvinyl alcohol as film-forming material, acrylamide and methylene diacrylamide as monomers, erythrosine B as initiator and triethanolamine as coinitiator. Its preparation process includes the following steps: firstly, dissolving polyvinyl alcohol in distilled water to obtain aqueous polyvinyl alcohol solution with weight ratio of 10%, adding triethanolamine dissolved in distilled water to the aqueous polyvinyl alcohol solution, further adding erythrosine B crystal dissolved in distilled water, and adding acrylamide and methylene diacrylamide crystal to obtain photopolymer sol, pouring the above-mentioned sol on a flat plate, ageing and volatilizing water content so as to obtain the photopolymer dry film, its diffraction efficiency can exceed 90%, and it is specially applicable to optical hologram storage.
Description
Technical field:
The invention relates to a kind of photopolymer Materials For Holography to green light sensitive and preparation method thereof.Material of the present invention is particularly useful for the light holographic memory.
Background technology:
The light holographic memory is a kind of Writing/Reading that can walk abreast, improve message transmission rate, can increase the mass memory of memory capacity again, have high storage capacity, very high message transmission rate and very fast access time and high advantages such as redundance, can solve shortcomings such as the intrinsic capacity of magnetic storage technology is little, step-by-step access, so become the dominant direction of computer nowadays memory technology development.Being applied in of holographic technique depends on to a great extent whether suitable material is arranged.Usually use different recording medium such as silver-colored halogen photoresist, dichromated gelatin, thermoplastic agent and light polymers etc.The photopolymer material is little because of the noise that it has, do not need back wet-chemical treatment technology and environment is had very strong repellence, low price, chemical composition range is wide, again can large-scale production etc. advantage make it have commercial widely practicality, become the focus of research in recent years.
Recent years, the development of photopolymer material is rapider, but major part all be with ruddiness as recording light source, the research of short blue green light wave band is less for wavelength.Because in optical storage, square being inversely proportional to of face memory capacity and wavelength, and the cube of body memory capacity and wavelength is inversely proportional to, so shorten recording light wavelength used in the optical storage process memory capacity that improves material is had important practical sense.People such as Zhang Chunlin provide (referring to [1] " photopolymer Materials For Holography of novel protection against the tide and application thereof " optics journal, 1993,13 (8): 729-733; [2] S.Blaya, L.Carretero, R.Mallavia, et al. " Optimization of an acrylamide-based dry film used forholographic recording ", Appl.Opt.1998,37 (32): 7604-7610.) photopolymer material is only to red light sensitiveness, and the light of other wavelength is not had susceptibility.In addition, the material in the document of above-mentioned technology formerly repeated relatively poor repeats difficulty under common condition of work.At these problems, the present invention will make its absorbing wavelength transfer to green light band, make photopolymer material have very high sensitivity.Can be under common condition of work, the diffraction efficiency that obtains material will reach 60%.
Summary of the invention:
Photopolymer Materials For Holography of the present invention is a kind of smooth polymers dry film, and by its percentage by weight (wt), its component contains:
Polyvinyl alcohol (PVA): 40～60%wt;
Acrylamide: 6～18%wt;
Methylene-bisacrylamide: 3～6%wt;
Triethanolamine: 20～45%wt;
Red B:0.1～the 0.3%wt of algae.
In the above-mentioned smooth polymers dry film be with polyvinyl alcohol (PVA) as film forming matter, acrylamide and methylene-bisacrylamide are as monomer, the red B of algae is as light trigger, triethanolamine is as coinitiator.
The concrete preparation process of the material of the invention described above is:
＜1〉40～60% polyvinyl alcohol (PVA) (PVA, molecular weight are about 1750 gram/moles) that at first will be by weight percentage adds in the distilled water and is heated to 80 ℃, and abundant stirring is fully dissolved it, obtains polyvinyl alcohol (PVA) (PVA) aqueous solution of 10%wt at last;
＜2〉will be that the triethanolamine of 20～45%wt is dissolved in the distilled water by weight percentage, the amount of getting of distilled water fully be dissolved in the distilled water with triethanolamine and be as the criterion, and is poured in the PVA aqueous solution that the above-mentioned first step obtains then and fully stirs;
＜3〉the red B crystal of algae with 0.1～0.3%wt fully is dissolved in the distilled water, and what obtain is dye solution, then this dye solution is added in the PVA aqueous solution that above-mentioned second step obtains and fully stir it is mixed;
＜4〉add the acrylamide crystal of 6～18%wt and the methylene-bisacrylamide crystal of 3～6%wt in the last PVA aqueous solution that obtains in above-mentioned the 3rd step, evenly stirring obtains light polymers colloidal sol.This step will operate under red light, in order to avoid the material exposure;
＜5〉above-mentioned the 4th colloidal sol that makes of step is poured on the flat board, was placed in the darkroom ageing then 36～48 hours, treat just to have obtained after moisture content fully volatilizees smooth polymers dry film of the present invention.
The photopolymerization process of light polymers dry film of the present invention is such: at first when with wavelength being the coherent light irradiation material of 514 nanometers, an optical attenuation reaction takes place in material just.Be excited to high-energy state as the red B dyestuff of algae, then NE BY ENERGY TRANSFER formed the excited state free radical of triethanolamine to triethanolamine, thereby and with polymerization as the acrylamide and methylene-bisacrylamide reaction the causing monomer of monomer.Monomer causes the difference of refractive index from the light intensity lower toward light intensity eminence migration, i.e. monomer concentration eminence refractive index height, and monomer concentration lower refractive index is low, so form an index modulation grating.When index modulation forms, just can produce high-diffraction efficiency.Dyestuff is bleached after overexposure, so can become transparency material after the sufficient illumination of photopolymer material process, is a kind of comparatively ideal optical recording media.The photopolymer material of the invention described above is to green light sensitive, and the peak value of absorption spectrum as shown in Figure 1 is in 528 nanometers, so can be that the argon laser of 514 nanometers is as recording light source with wavelength.The maximum diffraction efficiency of material surpasses 60% under common condition of work, if condition of work control is strict, then diffraction efficiency can surpass 90%; Sensitivity surpasses 100mJ/cm
2, the signal to noise ratio (S/N ratio) of material is higher, therefore is suitable for high capacity body holographic memory.And [S.Blaya in the above-mentioned document formerly, L.Carretero, R.Mallavia, et al. " Optimization of an acrylamide-based dry film used forholographic recording ", Appl.Opt.1998,37 (32): 7604-7610.] photopolymer material is the red laser sensitivity of 633 nanometers to wavelength only, controls under the extremely strictness in condition of work, and maximum diffraction efficiency also has only 80%.So the material among the present invention has better light holographic effect.
Description of drawings:
Fig. 1 is the absorption spectrum curve figure of material of the present invention.From then in the curve map material of the present invention as can be seen the peak value of high absorption spectrum in 528 nanometers, to green light sensitive.
Diffraction efficiency-time curve that Fig. 2 is obtained under common condition of work in embodiment 1 for material of the present invention.
The specific embodiment:
Embodiment 1: be prepared according to above-mentioned concrete preparation process, last prepared smooth polymers dry film constituent content is:
Polyvinyl alcohol: 60%wt.
Acrylamide: 10.4%wt.
Methylene-bisacrylamide: 5.3%wt.
Triethanolamine: 24.2wt.
The red B:0.1%wt. of algae
The diffraction efficiency that obtains as shown in Figure 2, greater than 60%.
Embodiment 2: be prepared according to above-mentioned concrete preparation process, last prepared smooth polymers dry film constituent content is:
Polyvinyl alcohol: 50%wt.
Acrylamide: 12%wt.
Methylene-bisacrylamide: 4%wt.
Triethanolamine: 33.8wt.
The red B:0.2%wt. of algae
The diffraction efficiency that present embodiment obtains can be described as and realizes preferably side of the present invention greater than 90% Formula.
Embodiment 3: be prepared according to above-mentioned concrete preparation process, last prepared smooth polymers dry film constituent content is:
Polyvinyl alcohol: 40%wt.
Acrylamide: 14.5%wt.
Methylene-bisacrylamide: 5.3%wt.
Triethanolamine: 40wt.
The red B:0.2%wt. of algae
Claims (2)
1. photopolymer Materials For Holography to green light sensitive, it is characterized in that it being a kind of smooth polymers dry film, its component contains the polyvinyl alcohol (PVA) of 40～60% (wt) according to percentage by weight (wt), the acrylamide of 6～18% (wt), the methylene-bisacrylamide of 3～6% (wt), the red B of the triethanolamine of 20～45% (wt) and 0.1～0.3% (wt) algae.
2. preparation method to the photopolymer of green light sensitive is characterized in that concrete preparation process is:
＜1〉at first will be by weight percentage 40～60% the polyvinyl alcohol (PVA) of (wt) add in the distilled water and be heated to 80 ℃, fully stir, fully after the dissolving, obtain the polyvinyl alcohol water solution of 10% (wt);
＜2〉triethanolamine with 20～45% (wt) fully is dissolved in the distilled water, is poured into then in the polyvinyl alcohol water solution of above-mentioned first step acquisition;
＜3〉the red B crystal of algae with 0.1～0.3%wt fully is dissolved in the distilled water, and the dye solution that obtains adds in the polyvinyl alcohol water solution that above-mentioned second step obtains and fully stirs mixes it;
＜4〉under red light, operate, add the methylene-bisacrylamide crystal of the acrylamide crystal and 3～6% (wt) of 6～18% (wt) in the polyvinyl alcohol water solution that in above-mentioned the 3rd step, obtains, evenly stir and obtain light polymers colloidal sol;
＜5〉above-mentioned the 4th colloidal sol that makes of step is poured on the flat board, was placed in the darkroom ageing then 36～48 hours, treat to obtain light polymers dry film after moisture content fully volatilizees.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100461000C (en) * | 2003-12-16 | 2009-02-11 | 三星电子株式会社 | Method for forming metal pattern with low resistivity |
| US8263291B2 (en) | 2005-11-25 | 2012-09-11 | Dublin Institute Of Technology | Holographic sensor |
| CN105785741A (en) * | 2014-12-15 | 2016-07-20 | 南京采薇且歌信息科技有限公司 | 3D holographic digital light processing projection device |
| CN105807562A (en) * | 2016-03-29 | 2016-07-27 | 莆田市荔城区聚慧科技咨询有限公司 | Photopolymer holographic dry plate sensitive to red light and preparation method of photopolymer holographic dry plate |
| CN111007697A (en) * | 2019-12-13 | 2020-04-14 | 北京航空航天大学 | Water-soluble photopolymer based on refractive index modulation and holographic recording material |
-
2001
- 2001-07-27 CN CNB011263571A patent/CN1145077C/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100461000C (en) * | 2003-12-16 | 2009-02-11 | 三星电子株式会社 | Method for forming metal pattern with low resistivity |
| US8263291B2 (en) | 2005-11-25 | 2012-09-11 | Dublin Institute Of Technology | Holographic sensor |
| US8535853B2 (en) | 2005-11-25 | 2013-09-17 | Dublin Institute Of Technology | Holographic sensor |
| CN105785741A (en) * | 2014-12-15 | 2016-07-20 | 南京采薇且歌信息科技有限公司 | 3D holographic digital light processing projection device |
| CN105785741B (en) * | 2014-12-15 | 2018-08-28 | 南京采薇且歌信息科技有限公司 | A kind of 3D holographies digital optical processing projection device |
| CN105807562A (en) * | 2016-03-29 | 2016-07-27 | 莆田市荔城区聚慧科技咨询有限公司 | Photopolymer holographic dry plate sensitive to red light and preparation method of photopolymer holographic dry plate |
| CN111007697A (en) * | 2019-12-13 | 2020-04-14 | 北京航空航天大学 | Water-soluble photopolymer based on refractive index modulation and holographic recording material |
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| CN1145077C (en) | 2004-04-07 |
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