Optical Quantum 4x 25GB DVD-R Shiny Silver Top. The Optical Quantum Blu-ray Disc series is on the cutting edge of technology using a blue-violet laser to record either high-definition (HD) video or high capacity gigabyte data files. Using Optical Quantums exclusive FMS (Flexible Manufacturing System) and sophisticated production know-how brings next generation products like recordable Blu-ray discs to market in the shortest time frame with reasonable pricing. Viewers will especially enjoy High-Definition video programming using the Optical Quantum Blu-ray Disc series.