seminar disc

8/7/2019 seminar disc

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A Presentation

On

Fluorescent Multi-Layer Disc

Internal guide Presented by

Mr. Lakshmisagar Nagadatta.P


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WHAT IS FMD?

Fluorescent Multilayer disc is a new technologydeveloped by Constellation 3D Inc.

It stores digital data in three dimensions.

It is a readable and re-writable disc.

It is an optical data storage disc, similar in size CD-ROMs And DVDs.


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NEED OF FMD?

Increased disc Capacity

Quick parallel access and retrieval information.

Media tolerances.

Usage Flexibility.


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OPERATING PRINCIPLE

The FMDs works on the phenomenon ofPHOTOCHROMISM.

The selection of fluorescent material.

Obtain fluorescent properties.

Simulation and Emission.

Filtration and Finish.


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Model of FMDs


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TECHNOLOGICAL PROCESS OF

MANUFACTURE

HOT STAMPING:-

y Pressing of sheets.

y Formation of layer.

y Filling the pits.

y Pressing of informational layers.


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FMD RECORDING

Technology Used:- WORM(WriteOnce Read Many)

Two Rules to be followed while

recording.

1. The write laser should able to turn

the fluorescence on or off

2. Threshold power of laser for

recording and less power for

reading


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FMD READ DEVICE

Reading process is carried out with

the help of a photosensitiveelement.

Device can read low-powerfluorescence of 10 MHz.

Reading speed up to 1GB/sec.

Mechanical speed of the derive is450 times lower than that of DVD.


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DEVELOPMENTS

First generation FMDs were to use 650 nm red

lasers, yielding roughly 140 GB per disc.

Second and third generation FMDs were to use 405 nm bluelasers, giving capacities of up to a terabyte.

A newly formed company called D Data Inc. acquired the

patent portfolio of Constellation 3D in 2003, and plans toreintroduce the technology under the new name of Digital

Multilayer Disk (DMD).


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COMPRASION OF DISC LAYERS


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PARAMETERSPARAMETERS CDCD DVDDVD FMDFMD

1.Disc Diameter1.Disc Diameter 1.2mm1.2mm 1.2mm1.2mm 1.2mm1.2mm

2.Capacity2.Capacity 700MB700MB 4.7GB4.7GB UptoUpto 1 TB1 TB

3.Wavelength3.Wavelength 780nm780nm 650nm650nm 480480--530nm530nm

4. Distance b/w4. Distance b/w

TracksTracks 1.6micron1.6micron 0.85micron0.85micron 0.80micron0.80micron

5.No.of layers5.No.of layers 11 22 UptoUpto 100100

CD vs DVD vs FMD


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y Data warehouses.

y E-commerce related data mining.

y Storage of very high detailed archive of maps.

y PVR (Priya Village Road show), HDTV.

y Ability to store a large amount of data in uncompressed format.

APPLICATIONS


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ADVANTAGES

y Prevents problem of interference since it uses anincoherent fluorescent light.

yCompatible with CD and DVD formats with more

storage area and faster access.

y Fluorescent technology do not require special

manufacturing conditions.

yCost of production of FMD is relatively cheap.

y It consists multiple data layers, Capacity of each data

layer is 4.7 GB


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CONCLUSION

y Mans need for additional storage space is increasing .

y The FMD Digital Cinema disc has the potential toprovide a secure, removable, single disc distribution

method.

y The FMD can provide us with a staggering 140 GB of

storage space seems to be an enticing solution for the

storage- hungry masses.


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REFERENCES

y www.en.wikipedia.org/wiki.

y www.seminartopic.org.

y www.edu.five.org


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