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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.
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 Telecommunications, solid-state laser pumping, machining, medical.. lead salt 3-20 μm
For example, a laser sight is a small, usually visible-light laser placed on a handgun or a rifle and aligned to emit a beam parallel to the barrel. Since a laser beam has low divergence, the laser light appears as a small spot even at long distances; the user places the spot on the desired target and the barrel of the gun is aligned (but not ...
A cold laser therapy device might cater to your inner and outer wellness, ... Visible Red Light: 660 nm. Invisible Red Light: 850 nm. Target areas: Abdominal, thigh, arm, back, and neck.
If the IR radiation is allowed into the beam, which happens in some green laser pointers, it will in general not be blocked by regular red or orange-colored protective eyewear designed for pure green or already IR-filtered beam. Special YAG laser and dual-frequency eyewear are available for work with frequency-doubled YAG and other IR lasers ...
A lens must be used in order to form a collimated beam like that produced by a laser pointer. If a circular beam is required, then cylindrical lenses and other optics are used. For single-spatial-mode lasers, using symmetrical lenses, the collimated beam ends up being elliptical in shape, due to the difference in the vertical and lateral ...