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 -10 12 Hz Color Energy of one photon 10 -18 JeV 760395Dark-red0,261,6 620483Red0,322,0 590508Orange0,342,1 560536Yellow0,362,2 500600Green0,402,5 480625Sky-blue0,412,6 450666Blue0,442,7 380789Violet0,523,3 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

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