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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. The small width of the beam and the low power of typical laser pointers make the beam itself invisible in a ...
Optical discs, laser pointers, data communications. 780 nm compact disc, 650 nm general DVD player and 635 nm DVD for Authoring recorder laser are the most common lasers type in the world. Solid-state laser pumping, machining, medical. InGaAsP: 1.0-2.1 μm
Laser pointers in different colours. Many scientific, military, medical and commercial laser applications have been developed since the invention of the laser in 1958. The coherency, high monochromaticity, and ability to reach extremely high powers are all properties which allow for these specialized applications.
These hiccups aside, this offered the strongest print quality we saw from an inkjet printer with text that rivals the sharpness of a laser model. —BEST BUDGET PRINTER— HP Envy Inspire 7955e
A trove of rare film posters and art relating to one of Northern Ireland’s greatest directors will go up for auction next week. Brian Desmond Hurst directed the 1951 A Christmas Carol adaptation ...
Violet DPSS laser pointers (120 mW at 405 nm) use a direct diode infrared gallium arsenide (1 W @ 808 nm) lasers being directly doubled, without a longer-wave diode-pumped solid state laser interposed between diode laser and doubler-crystal results in higher-power.
Nd:YAG laser with lid open showing frequency-doubled 532 nm green light. Nd:YAG laser rod. Nd:YAG ( neodymium-doped yttrium aluminum garnet; Nd:Y3Al5O12) is a crystal that is used as a lasing medium for solid-state lasers. The dopant, neodymium in the +3 oxidation state, Nd (III), typically replaces a small fraction (1%) of the yttrium ions in ...
The word laser is an anacronym that originated as an acronym for light amplification by stimulated emission of radiation. [1] [2] The first laser was built in 1960 by Theodore Maiman at Hughes Research Laboratories, based on theoretical work by Charles H. Townes and Arthur Leonard Schawlow.
Laser pointers. In the period from 1999 to 2016, increasing attention has been paid to the risks posed by so-called laser pointers and laser pens. Typically, the sale of laser pointers is restricted to either class 3A (<5 mW) or class 2 (<1 mW), depending on local regulations.
Milwaukee ultimately couldn’t keep up with a Pacers offense that set a playoff franchise record with 22 made 3-pointers on 43 attempts (51.2%). Center Myles Turner led the 3-point barrage with a ...