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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.
Pointing a laser at an aircraft can be hazardous to pilots, [1] and has resulted in arrests, trials and jail sentences. It also results in calls to license or ban laser pointers. Some jurisdictions such as New South Wales, Australia have restricted laser pointers as a result of multiple incidents.
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.
This is a list of laser types, their operational wavelengths, and their applications. Thousands of kinds of laser are known, but most of them are used only for specialized research.
Laser sights were popularized outside of military and law enforcement when Laser Products fitted The Terminator's iconic weapon, a .45 Longslide pistol, with a custom He-Ne laser. Today, most modern laser sights are solid-state lasers, as opposed to the original gas design.
The Nd:YAG laser is the most common laser used in laser designators and laser rangefinders. During the Iran–Iraq War , Iranian soldiers suffered more than 4000 cases of laser eye injury, caused by a variety of Iraqi sources including tank rangefinders.
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.
Laser Weapon System (LaWS) demonstration aboard USS Ponce. The AN/SEQ-3 Laser Weapon System or XN-1 LaWS is a laser weapon developed by the United States Navy. The weapon was installed on USS Ponce for field testing in 2014.
Usually up to 1 mW power, for example, laser pointers. Class 3R (formerly IIIa) lasers are usually up to 5 mW and involve a small risk of eye damage within the time of the blink reflex. Staring into such a beam for several seconds is likely to cause damage to a spot on the retina.
The laser guidance of a robot is accomplished by projecting a laser light, image processing and communication to improve the accuracy of guidance. The key idea is to show goal positions to the robot by laser light projection instead of communicating them numerically.