Search results
Results from the WOW.Com Content Network
The violet 405 nm laser (whether constructed directly from GaN or frequency-doubled GaAs laser diodes) is not in fact blue, but appears to the eye as violet, a color for which a human eye has a very limited sensitivity.
This is due to the shorter wavelength (405 nm) of the blue-violet laser employed. MOs use a 650 nm-wavelength red laser. Because its beam width is shorter when burning to a disc than a red-laser for MO, a blue-violet laser allows more information to be stored digitally in the same amount of space. Current generations of UDO2 media store up to ...
These laser diodes are mass-produced for the reading and writing of data in Blu-ray drives (although the light emitted by the diodes is not blue, but distinctly violet). In mid-to-late 2011, 405 nm blue-violet laser diode modules with an optical power of 250 mW, based on GaN violet laser diodes made for Blu-ray disc readers, had reached the ...
Red (660 & 635 nm), green (532 & 520 nm), and blue-violet (445 & 405 nm) lasers ... Blu-ray players (violet), or even higher power laser diodes from CD or DVD burners.
405 nm: InGaN blue-violet laser, in Blu-ray Disc and HD DVD drives; 445–465 nm: InGaN blue laser multimode diode for use in mercury-free high-brightness data projectors; 488 nm: InGaN green-blue laser; became widely available in mid-2018. 505 nm: InGaN bluish-green laser; also became widely available in mid-2018.
For example, GaN is the substrate that makes violet (405 nm) laser diodes possible, without requiring nonlinear optical frequency doubling. Its sensitivity to ionizing radiation is low (like other group III nitrides), making it a suitable material for solar cell arrays for satellites.
One of the first applications of laser-stimulated fluorescence in anthropology, the tattoos contain lines only 0.1 millimeter wide. Tattoos Found on 1,000-Year-Old Mummies Rival Our Own Skip to ...
Laser types with distinct laser lines are shown above the wavelength bar, while below are shown lasers that can emit in a wavelength range. The height of the lines and bars gives an indication of the maximal power/pulse energy commercially available, while the color codifies the type of laser material (see the figure description for details).