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Optical data storage media and methods for using the same

A technology for storage media and optical data, applied in optical recording/reproduction, optical recording/reproduction/erasing methods, optics, etc.

Inactive Publication Date: 2012-07-18
GENERAL ELECTRIC CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Also, since no contact is required to read the data, optical media is not as susceptible to damage from repeated use over time as vinyl media
[0003] However, as known to those skilled in the art, conventional optical data storage media do have limitations

Method used

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  • Optical data storage media and methods for using the same
  • Optical data storage media and methods for using the same
  • Optical data storage media and methods for using the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-2

[0072] Example 1-2 (E-1 to E-2) Synthesis of polyvinyl alcohol attached with cinnamoyl chloride derivative

[0073] To a 250 mL round bottom flask was added 88% hydrolyzed polyvinyl alcohol (1.4 g, 0.0292 moles of repeating units) and 25 mL of N-methylpyrrolidone. The resulting mixture was heated to about 80° C. for about 2 hours under a nitrogen atmosphere. Heating causes complete decomposition of polyvinyl alcohol. The resulting mixture was cooled to about 50°C. The cinnamoyl chloride derivative was added in portions as a solid over a period of about 2 hours. After the addition was complete, the mixture was stirred for about 1 hour at about 50°C. The resulting mixture was precipitated into a blender containing 75 mL of methanol. The resulting solid was collected by suction filtration, then dissolved in 30 ml of dichloromethane and reprecipitated into 75 ml of methanol. The resulting solid was dried in a vacuum oven at room temperature for 4 hours, then at 50 °C overnigh...

Embodiment 11

[0086] Example 11 (E-11): Preparation of polymer films for holographic studies from polyvinyl alcohol attached with cinnamoyl chloride derivative prepared in E-1 and E-2.

[0087] Thick film samples for demonstrating microholograms and recording reflectivity after writing microholograms were prepared as follows. Preparation of 1 g of PVCm (prepared in E-2) doped with 0.04 mol of a triarylmethane dye (e.g. ethyl violet chloride salt) and 4 wt% (40 mg, relative to polymer) of the mediator diphenylmethane 10% by weight solution of ketone in dichloromethane:dichloroethane (9:1). The solution was filtered through a 0.45 micron Whatman syringe filter. The solution was then solvent cast onto (5 cm x 5 cm) pyrex glass by loading the solution onto a circular glass frame. The entire above setup was placed on a hot plate set at 45°C. The sample was covered with an inverted glass funnel covering the entire sample and the opening of the funnel tip covered with a Kimwipe to keep the solv...

Embodiment 12-13

[0095] Examples 12-13 (E-12 and E-13) and Comparative Examples 3-4 (CE-3 and CE-4):

[0096] Preparations for sensitive A comparative study of polymer films.

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Abstract

An optical data storage medium is provided. The optical data storage medium includes a polymer matrix; a reactant capable of undergoing a change upon triplet excitation, thereby causing a refractive index change; and a non-linear sensitizer capable of absorbing actinic radiation to cause upper triplet energy transfer to said reactant. The refractive index change capacity of the medium is at least about 0.005. The non-linear sensitizer comprises a triarylmethane dye.

Description

technical field [0001] The invention relates to optical data storage media. More particularly, the present invention relates to holographic storage media and methods of making and using the same. Background technique [0002] The rapid development of the information technology industry has created an increasing need for data storage systems. Optical data storage in which data is read or written by shining light on, for example, a disk than recorded data must be read by other means such as a magnetic head that reads magnetic media or a needle that reads media recorded in vinyl Data in the media has an advantage. And, more data can be stored optically on smaller media than can be stored on vinyl media. Also, since no contact is required to read the data, optical media is not as prone to damage from repeated use over time as vinyl media. [0003] However, conventional optical data storage media do have limitations, as known to those skilled in the art. Alternative methods ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G11B7/0065G11B7/26G11B7/24035G11B7/24044G11B7/246
CPCG03H2240/54G11B7/245G03H2260/14G03H2260/12G11B7/24044G11B7/00772G11B7/246B82Y10/00G11B7/244G03H2001/0264G03H1/0248G03H2240/24G11B7/00454G11B7/24G11B7/0065
Inventor A·纳塔拉延P·J·麦克罗斯基E·P·博登陈国邦M·J·米斯纳E·M·金
Owner GENERAL ELECTRIC CO
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