Blu-ray (Blu-ray Disc or BD) is a digital optical disc data storage format designed to supersede the DVD format. It was invented and developed in 2005 and released worldwide on June 20, 2006, capable of storing several hours of high-definition video (HDTV 720p and 1080p).

With Blu-ray, you can: Discs store digitally encoded video and audio information in pits -- spiral grooves that run from the center of the disc to its edges. A laser reads the other side of these pits -- the bumps -- to play the movie or program that is stored on the DVD.

By employing a short wavelength (405nm) blue violet laser, the Blu-ray Disc (BD) successfully minimises its beam spot size, reducing the lens’ NA to 0.85 and so making it possible to focus the laser spot with much greater precision.

Sep 10, 2023 · Even though the data on 4K discs is much more compacted, does the player use the same laser it uses for Blu-ray discs? Or are there two "blue" lasers in the player - one for standard...

The Blu-Ray standard takes its name from the blue laser used to read and write data within the drive mechanism. The laser operates at a wavelength of 405 nm making it somewhere in the order of two thirds the wavelength of the lasers used to read conventional DVDs (red - 650nm) and CDs (infrared – 780nm).

Mar 1, 2016 · Unlike current DVDs, which use a red laser to read and write data, Blu-ray uses a blue laser. A blue laser has a shorter wavelength (405 nanometers) than a red laser (650 nanometers). The smaller beam focuses more precisely, enabling it to read information recorded in pits that are only 0.15 microns (µm) (1 micron = 10 -6 meters) long — this ...

When HD-DVD finally capitulated in November 2008 Blu-ray became the industry standard for blue laser optical disk technology. With 100GB capacity, live web interaction and high definition, surely the Blu-ray Disk (BD) is the future?

Unlike current DVDs, which use a red laser to read and write data, Blu-ray uses a blue laser (which is where the format gets its name). A blue laser has a shorter wavelength (405 nanometers) than a red laser (650 nanometers).

CyberLink's free BD Advisor diagnostic software helps check your PC system is ready to play high-definition Blu-ray Discs

However, getting a blue laser to fire out of a small enough diode at one end and not simultaneously punch a hole out of its rear end had stumped the world’s leading technologists for decades. The objective was clear: to find a blue laser technology that was commercially viable.