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The current optical disc format for high-definition (HD) video at 2K resolution (for 4K Blu-ray, see Ultra HD Blu-ray). Developed primarily by Sony, Blu-ray discs have the same diameter as DVDs, but the pits are a third the size on tracks packed more tightly together. As a result, movies with 1,080 lines of resolution can be recorded, compared to 480 or 576 for a DVD (U.S. NTSC format is 480 lines, PAL format is 576 lines). Blu-ray players read CDs and DVDs, support navigation via menus programmed in Java and feature advanced audio and video formats (see Java, Dolby Digital, DTS, H.264, VC-1).

Commentary and Extra Content
All players support Profile 1.0. Bonus View (Profile 1.1) requires 256MB of flash memory and uses a second A/V codec for running picture-in-picture commentary. BD-Live (Profile 2) requires 1GB of flash to access content from the Internet such as scenes that were cut, interviews with the director and actor history. See BD-Live.

Blu-ray History
In 2003, the first Blu-ray recorders were sold in Japan, and in 2006, Sony's PlayStation 3 was one of the early products to feature a Blu-ray drive (see PlayStation). For several years, Blu-ray competed with HD DVD for the new high-res standard, but HD DVD was later abandoned (see HD DVD). See HD formats, Blu-ray 3D, DVD and DTV.

FULL-SIZE 120MM DISCS    Record  ---Modes--Layers          GB  Hours  ROM  RE  RDVD (480/576 lines)
  Single (DVD-5)  4.3   2     X   X   X
  Dual   (DVD-9)  7.9   4     X   X   X

  BLU-RAY (1,080 lines)
  Single          25    4.5   X   X   X
  Dual            50    9     X   X   X
  Triple BDXL    100   18         X   X
  Quad BDXL      128   23             X

    ROM = Read Only (pressed movie disc)RE = REwritableR = Recordable (write once)

Blu-ray and More
The award-winning Oppo BDP-103 plays Blu-ray, Blu-ray 3D and DVD movies, numerous video formats from a USB flash drive (orange USB inserted), as well as music from CD, SACD and DVD-Audio discs. "FW Found" means a firmware update is available.

Blu-ray Disc Xtra Large (BDXL)
For permanent archival storage, this Sony optical system records on quad-layer BDXL discs one time only. The plastic demo unit (top) reveals all 12 discs in the 1.5TB cartridge (see table above).
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References in periodicals archive ?
At the exit face of the second prism we have more unphysical refraction, with the red and blue rays bending in opposite directions and the green once again passing through the surface as if it were not there.
Imran Ali led the century-makers as he slammed 126 not out to lead Adgas to a 65-run win over Blue Rays.
Christopher Matthew Nolan, aged 23, of Newbury House, Newtown, who is charged with entering Richer Sounds, Smallbrook Queensway, and stealing a LG Blue Ray DVD player on August 9, also appeared before Magistrates.
NORTHERN Ireland's top hairdressor Jason Shankley is offering free Mohawks for his clients today to celebrate the launch of launch of the A-team on Blue Ray Trip Play and DVD from Twentieth Century Fox Home Entertainment.
The assets - including the HR Hughes and Blue Ray stimulation vessels - will be acquired by Superior Energy Services.
Optical pick up is the main component of optical disc drive, such as blue ray disc recorder, DVD players, and CD/DVD drive computers.
It has been announced that first Sony Blue Ray player will not support SACD.
It is possible to apply the new substance not only to a DVD, but to a CD and blue ray disk, which is a next-generation memory storage device, the company said.
Blue ray laser is shorter in wave length than red laser, thus the blue ray penetrates less into the substrate.
We've bought a 47-inch flat screen TV and a PS3 Blue Ray Games Console."