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Red (635 nm), blueish violet (445 nm), and green (520 nm) laser pointers. A laser pointer or laser pen is a (typically battery-powered) handheld device that uses a laser diode to emit a narrow low-power visible laser beam (i.e. coherent light) to highlight something of interest with a small bright colored spot.
On March 28, 2008, a coordinated attack took place using four green laser pointers aimed at six aircraft landing at Sydney airport in New South Wales, Australia. [37] [38] As a result of this attack plus others, a law was proposed in mid-April 2008 in New South Wales to ban possession of handheld lasers, including low-power classroom pointers.
Green laser pointers are the most commonly used, according to the FAA’s data. Patrick Murphy, editor of LaserPointerSafety.com, said green lasers are the most widely available and are also ...
The first laser, invented by Theodore Maiman in May 1960. Nd:YAG laser: 1.064 μm, (1.32 μm) Flashlamp, laser diode: Material processing, rangefinding, laser target designation, surgery, tattoo removal, hair removal, research, pumping other lasers (combined with frequency doubling to produce a green 532 nm beam). One of the most common high ...
A green laser pointer is a frequency doubled Nd:YVO 4 diode-pumped solid state laser . [48] Nd:YAG can be also made to lase at its non-principal wavelength. The line at 946 nm is typically employed in "blue laser pointer" DPSS lasers, where it is doubled to 473 nm. [49] [50] [51]
(Reuters) - Portland Police said on Tuesday some of its officers had been targeted with a "powerful green laser" capable of causing permanent eye damage when some 200 protesters marched on the ...