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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.
Light level 5.0 μW/cm 2; for example, a legal 5 mW laser pointer at 1,200 feet (370 m). Simulation of temporary flash blindness where the image takes from a few seconds to a few minutes to fade away, depending on how much light entered the eye. Light level 50 μW/cm 2; for example, a legal 5 mW laser pointer at 350 feet (110 m).
Also used pulsed for marking and micromachining. A frequency doubled nd:YVO 4 laser is also the normal way of making a green laser pointer. Neodymium-doped yttrium calcium oxoborate Nd:Y Ca 4 O(BO 3) 3 or simply Nd:YCOB ~1.060 μm (~530 nm at second harmonic) laser diode
The Advanced Target Pointer Illuminator Aiming Laser, ATPIAL AN/PEQ-15 known colloquially as the "PEQ-15" [/ p ɛ k / / f ɪ f t iː n /] produced by L3Harris (originally designed and manufactured by Insight Technology, until their acquisition by L3Harris in 2010); is a multifunction IR Target Pointer & Illuminator, a.k.a. a Laser Aiming Module (LAM) for use as a rifle attachment, using a ...
Frequency-doubled diode-pumped solid-state (DPSS) lasers are used to make bright green laser pointers. Ytterbium, holmium, thulium, and erbium are other common "dopants" in solid-state lasers. [70] [page needed] Ytterbium is used in crystals such as Yb:YAG, Yb:KGW, Yb:KYW, Yb:SYS, Yb:BOYS, Yb:CaF 2, typically operating around 1020–1050 nm ...
Mobile robot guidance by laser beam (sketch) Laser guidance directs a robotics system to a target position by means of a laser beam. The laser guidance of a robot is accomplished by projecting a laser light, image processing and communication to improve the accuracy of guidance.