User talk:Laserpointer2012

Laser pointer
Laser pointer Wikipedia card Laser Pointer (china:激光指示器) is the laser as indicative of small, low-power lasers, general civilian goods, also known as laser pointer, referring to the star pen. Cited is a versatile product: teaching, research units, with the video equipment as a teaching, academic reports, meetings and other occasions as instructions; military units used in conjunction with the instructions of the command system of the big screen; tourism units for guided tours; construction and renovation supervision units for construction, renovation acceptance instructions. Some cases can also be fixed as a directional tool; can also be as a gift.

Outline The laser designator is a laser is used as indicative of small, low-power lasers, general civilian goods, also known as laser pointer, referring to the star pen. Cited is a versatile product: teaching, research units, with the video equipment as a teaching, academic reports, meetings and other occasions as instructions; military units used in conjunction with the instructions of the command system of the big screen; tourism units for guided tours; construction and renovation supervision units for construction, renovation acceptance instructions. Some cases can also be fixed as a directional tool; can also be as a gift.

Application Outdoor Adventure For wild adventure, indicating a distant goal and sent out distress signals. Make your travel more fun and interesting, is the preferred equipment for outdoor activities. Amateur astronomers For astronomy refers to the star, the green laser beam injection is a very beautiful green line is very suitable for observing the stars at night, can accurately indicate the position of the stars. Mining field / construction staff Used for remote indication / measurement of buildings, you can avoid going near the danger zone, as if the scene to direct you a kilometer away. Self-defense When you encounter a dangerous animal attacks in the mountains, or criminals, robbery you pose a threat to your life and property can be used to self-defense, as long as you come up with to scare each other like, not really engage people blind. Military command or exercise When you explain your goals to your subordinates which direction in the air or in distant hillside, you can also hand the desperate gestures? Of course not, you push the button the green light pen button will be able to point to the sky, so that your demeanor greatly increased.



Classification Red, green, blue-violet laser beam Early laser pointer to use a wavelength of 633 nanometer (nm) helium-neon (HeNe) gas laser, usually used to produce energy does not exceed 1 mW laser beam. The cheapest laser pointer wavelength close to the the 670/650nm the dark red laser diode. Slightly more expensive using the 635nm red - orange diode, the wavelength is more easily identified by the human eye. There are other color laser pointer, the most common is the wavelength of 532nm green. In recent years, 593.5nm yellow - orange laser pointer is also beginning to emerge. September 2005, a 473nm blue laser pointer. Wavelength of 405nm Blu-ray in early 2010 "(violet) laser pointer. Laser pointer exposure of the apparent brightness of the spot not only depends on the laser power and surface reflectivity, also depends on the color vision of the human eye. For example, because the human eye is most sensitive to the visible spectrum wavelength of 520-570nm green, red or blue wavelength sensitivity decreased, the same power under the green light is brighter than other colors. Red, green, blue-violet laser spot Laser pointer power is usually in milliwatts. In the U.S., the laser is classified by the American National Standards Institute and the U.S. Food and Drug Administration (FDA). Power is less than 1 mW of visible light (wavelength 400-700nm) laser pointer for the second class (Class 2 or II); power range of 1-5 mW for the third category (Class 3A or stage IIIa). The third category B (Class 3B/IIIb) lasers (5-500 mW power) and the fourth class (Class 4/IV) laser (power greater than 500 mW) laser pointer in the name of promoting the sale in accordance with the law can not be. Common laser pointer red light (655/635nm), yellow (589/593nm), green (532nm), blue light (473/445nm) and blue-violet light (405nm). Red Because of the wavelength of the laser diode, so its structure is the most simple, basically only consisting of a battery energy diode. The red laser pointer first appeared in the 1980s, is bulky hundreds of dollars worth of equipment; is very small and very cheap. In recent years there have been a wavelength of 671nm diode pumped solid state laser (DPSS) red laser pointer. Although the wavelength of inexpensive diode, DPSS technology can produce a higher quality, the band is more narrow laser. Yellow Recently appeared on the market a wavelength of 593.5nm yellow laser pointer. 1064nm and 1342nm laser wavelength DPSS technology, the sum obtained through a nonlinear crystal. The complexity of the process makes the yellow laser pointer unstable and inefficient, with the temperature changes the output power of 1-10 mW, if the hot or too cold will be a mode jump. This is because the laser pointer the size of the lead can not provide the required temperature stability and cooling components. In addition, most of the 593.5nm laser pointer work in pulse mode for the smaller size and power of the pump diode. Green The use of 808nm wavelength infrared laser excitation of nonlinear crystal to produce 1064nm infrared light, and then by frequency doubling the 532nm green belong to the solid-state laser. The green laser pulse or quasi-continuous mode down to reduce cooling problems and prolong battery life. The recently announced without SHG green laser has a higher efficiency. At night, even low-power green light due to Rayleigh scattering of atmospheric molecules also can be seen, this laser pointer is often astronomy enthusiasts for pointing stars and constellations. The green laser pointer can have a variety of output power. 5mW (three categories a) to use the most secure, and can also be found under the dim lighting, so do not need more power for steering purposes. Blu-ray The original only by DPSS 473nm blue laser power is low and unstable. Recently, CASIO developed a mix of blue laser diode (445nm) light source of high brightness projectors, power more than 1000mW (Fourth Class) of the Blu-ray semiconductor diode is the mass production and popularization of Purple Wavelength of 405nm blue-violet laser diode, a semiconductor laser, close to the UV band, low visibility, but can stimulate fluorescence, with the role of paper money and testing chemicals.