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Sony XDCAM Disk-23GB, PFD-23A

New Nonlinear Recording Medium-The XDCAM Professional Disc

The Sony XDCAM Professional Disc media, PFD23A, is a newly developed, single-sided optical disc that uses state-of-the-art blue-violet laser technology to enable extremely large-capacity recordings. The diameter of the disc is a mere 12-cm, equal to that of other optical media such as CDs or DVDs. Yet, despite its small size, the disc provides an amazing storage capacity of 23.3 GB - a feat made possible using a 405 nm blue-violet laser, an objective lens with a 0.85 numerical aperture (NA), and a specially developed recording layer.

• Storage capacity: 23.3 GB
• Laser wave length: 405 nm (blue-violet)
• Data transfer (writing) rate:72 Mb/s (per optical head)
• Disc diameter: 4 5/8 inches (120 mm)
• Cartridge dimensions: 5 1/8 x 5 1/4 x 3/8 inches
• Weight: 3-oz (90 g)
• Recording format: Phase change recording