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- Laser_pointer abstract "A laser pointer or laser pen is a small handheld device with a power source (usually a battery) and a laser diode emitting a very narrow coherent low-powered laser beam of visible light, intended to be used to highlight something of interest by illuminating it with a small bright spot of colored light. Power is restricted in most jurisdictions not to exceed 5 mW.The small width of the beam and low power of typical laser pointers make the beam itself invisible in a reasonably clean atmosphere, only showing a point of light when striking an opaque surface. Some higher-powered laser pointers project a visible beam via scattering from dust particles or water droplets along the beam path. Higher-power and higher-frequency green or blue lasers may produce a beam visible even in clean air because of Rayleigh scattering from air molecules, especially when viewed in moderately-to-dimly lit conditions. The intensity of such scattering increases when these beams are viewed from angles near the beam axis. Such pointers, particularly in the green-light output range, are used as astronomical-object pointers for teaching purposes.The recent low-cost availability of infrared (IR) diode laser modules of up to 1000 mW (1 watt) output has created a generation of IR-pumped frequency-doubled (DPSS) laser pointers in green, blue, and violet, of higher visible power, typically up to 300 mW. Because the IR-laser component in the beams of these visible lasers is difficult to filter out, and also because filtering it contributes extra heat which is difficult to dissipate in a small pocket "laser pointer" package, it is often left as a beam component in cheaper high-power pointers. This invisible laser light component causes a degree of extra potential hazard in these devices when pointed at nearby objects and people.[citation needed]Laser pointers make a potent signaling tool, even in daylight, and are able to produce a bright signal for potential search and rescue vehicles using an inexpensive, small and lightweight device of the type that could be routinely carried in an emergency kit.Laser pointers if aimed at a person's eyes can cause temporary disturbances to vision. There is some evidence of rare minor permanent harm, but low-powered laser pointers are not seriously hazardous to health. They may be a major annoyance in some circumstances. A dot of light from a red laser pointer may be thought to be due to a laser gunsight, causing outrage and possible danger. When pointed at aircraft at night, laser pointers may dazzle and distract pilots, and increasingly strict laws have been passed to ban this.".
- Laser_pointer thumbnail Lasers.jpeg?width=300.
- Laser_pointer wikiPageExternalLink index.html.
- Laser_pointer wikiPageExternalLink laser_hazards_web.pdf.
- Laser_pointer wikiPageExternalLink protecting-aircraft-from-lasers.
- Laser_pointer wikiPageExternalLink default.htm.
- Laser_pointer wikiPageExternalLink www.iec.ch.
- Laser_pointer wikiPageExternalLink www.laserpointersafety.com.
- Laser_pointer wikiPageExternalLink manuscript-publication-search.cfm?pub_id=912781.
- Laser_pointer wikiPageID "1442115".
- Laser_pointer wikiPageRevisionID "603271166".
- Laser_pointer hasPhotoCollection Laser_pointer.
- Laser_pointer subject Category:Laser_applications.
- Laser_pointer subject Category:Laser_image_generation.
- Laser_pointer subject Category:Lasers.
- Laser_pointer subject Category:Office_equipment.
- Laser_pointer type Artifact100021939.
- Laser_pointer type Device103183080.
- Laser_pointer type Instrumentality103575240.
- Laser_pointer type Laser103643253.
- Laser_pointer type Lasers.
- Laser_pointer type Object100002684.
- Laser_pointer type OpticalDevice103851341.
- Laser_pointer type PhysicalEntity100001930.
- Laser_pointer type Whole100003553.
- Laser_pointer comment "A laser pointer or laser pen is a small handheld device with a power source (usually a battery) and a laser diode emitting a very narrow coherent low-powered laser beam of visible light, intended to be used to highlight something of interest by illuminating it with a small bright spot of colored light.".
- Laser_pointer label "Apontador laser".
- Laser_pointer label "Laser pointer".
- Laser_pointer label "Laserowy wskaźnik celu".
- Laser_pointer label "Laserpointer".
- Laser_pointer label "Pointeur laser (présentation)".
- Laser_pointer label "Puntero láser".
- Laser_pointer label "Лазерная указка".
- Laser_pointer label "مؤشر ليزر".
- Laser_pointer label "レーザーポインター".
- Laser_pointer label "激光笔".
- Laser_pointer sameAs Laserpointer.
- Laser_pointer sameAs Puntero_láser.
- Laser_pointer sameAs Pointeur_laser_(présentation).
- Laser_pointer sameAs レーザーポインター.
- Laser_pointer sameAs 레이저_포인터.
- Laser_pointer sameAs Laserowy_wskaźnik_celu.
- Laser_pointer sameAs Apontador_laser.
- Laser_pointer sameAs m.051xx4.
- Laser_pointer sameAs Q1365018.
- Laser_pointer sameAs Q1365018.
- Laser_pointer sameAs Laser_pointer.
- Laser_pointer wasDerivedFrom Laser_pointer?oldid=603271166.
- Laser_pointer depiction Lasers.jpeg.
- Laser_pointer isPrimaryTopicOf Laser_pointer.
