Abstract of Blue Laser or BluEra......
A blue laser operates in the blue range of the light spectrum, ranging from about 405nm to 470nm. Most blue laser are diodes use indium gallium nitride as the material to create the laser light, although the amount of indium included in the material varies. (Some blue laser diodes use no indium.) Some manufacturers create blue LEDs (light-emitting diodes), which create light in a manner similar to lasers with silicon carbide.
A blue laser operates in the blue range of the light spectrum, ranging from about 405nm to 470nm. Most blue laser are diodes use indium gallium nitride as the material to create the laser light, although the amount of indium included in the material varies. (Some blue laser diodes use no indium.) Some manufacturers create blue LEDs (light-emitting diodes), which create light in a manner similar to lasers with silicon carbide.
Blue laser beams have a smaller spot size and are more precise than red laser beams, which lets data on blue laser optical storage discs be stored more densely. The spot size of a laser beam is one determining factor, along with the materials in the optical disc and the way the laser is applied to the disc, in the size of the pits the laser makes on an optical disc. Laser beams with larger spot sizes typically create larger pits than those with smaller pit sizes. Blue lasers are desirable because blue light has the shortest wavelength among visible light. A blue laser operates at a shorter wavelength of about 405nm than a red laser at about 650nm. A nanometer (nm) is one-billionth of a meter, onemillionth of a millimeter, and one-thousandth of a micron. One inch is equal to about 25.4 million nanometers. A human hair is about 50,000nm wide.
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