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Physical and information community of different kinds of optical disks

Physical and information community of different kinds of optical disks. periodical grating — > diffraction microstructures interference reflection diffraction polarization. Wavelength, nm. Frequency, THz -10 12 Hz. Color. Energy of one photon. 10 -18 J. eV. 760. 395.

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Physical and information community of different kinds of optical disks

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  1. Physical and information community of different kinds of optical disks periodical grating —> diffraction microstructures • interference • reflection • diffraction • polarization

  2. Wavelength, nm Frequency, THz -1012 Hz Color Energy of one photon 10-18J eV 760 395 Dark-red 0,26 1,6 620 483 Red 0,32 2,0 590 508 Orange 0,34 2,1 560 536 Yellow 0,36 2,2 500 600 Green 0,40 2,5 480 625 Sky-blue 0,41 2,6 450 666 Blue 0,44 2,7 380 789 Violet 0,52 3,3 c=300000 km/s h=6.626*10-34 J.s 1ev=1,6*10-19 J E=h Laser – Light amplification by stimulated emission of radiation Energy of one light quantum (photon)

  3. Blue Ray Laser Technology Third Generation Optical Disc

  4. Blu-ray Disc Founders • LG Electronics • Matsushita Electric Industrial Corporation • Mitsubishi Electric Corporation • Sony Corporation • Phillips Electronics • Hitachi • Pioneer • Sharp Corporation • Thompson • Samsung Corporation

  5. Applications require, NA, Wavelength, Storage Capacity, Data Rate Application Music Video HDTV

  6. From CD to DVD to Blu-ray Disc (BD) Blu-ray Disc

  7. Main Specifications Blu-ray • Recording capacity up to 27GB • Laser wavelength 405nm (blue-violet laser) • Lens numerical aperture (NA) 0.85 • Data transfer rate 36Mbps • Disc diameter 120mm • Disc thickness 1.2mm (optical transmittance protection layer: 0.1mm) • Recording format Phase change recording • Tracking pitch 0.32 m • Shortest pit length 0.138 m • Recording phase density 19.5 Gbit/inch2 • Video recording format MPEG2 video • Audio recording format MPEG1

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