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

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Presentation on theme: "Physical and information community of different kinds of optical disks periodical grating > diffraction microstructures interference reflection diffraction."— Presentation transcript:

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

2 Energy of one light quantum (photon) Wavelength, nm Frequency, THz Hz Color Energy of one photon JeV Dark-red0,261, Red0,322, Orange0,342, Yellow0,362, Green0,402, Sky-blue0,412, Blue0,442, Violet0,523,3 c= km/s h=6.626* J.s 1ev=1,6* J E=h Laser – Light amplification by stimulated emission of radiation

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 HitachiPioneer Sharp Corporation Thompson Samsung Corporation

5 ApplicationMusicVideoHDTV Applications require, NA, Wavelength, Storage Capacity, Data Rate

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

7 Main Specifications Blu-ray Recording capacityup to 27GB Laser wavelength405nm (blue-violet laser) Lens numerical aperture (NA)0.85 Data transfer rate36Mbps Disc diameter120mm Disc thickness1.2mm (optical transmittance protection layer: 0.1mm) Recording formatPhase change recording Tracking pitch0.32 m Shortest pit length0.138 m Recording phase density19.5 Gbit/inch 2 Video recording formatMPEG2 video Audio recording formatMPEG1


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