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The line width of an ordinary laser is usually several kilohertz to several million hertz, which is not suitable for a particularly high precision test. The German Federal Institute of Physics and Technology and the American Academy of Experimental Astrophysical Physics scientists to create two wavelengths of about 1.5 microns of green laser pointer, compared to show that the line width of 10 milliseconds of these 2000mw laser is very stable, composed of laser All the light waves are very similar, the oscillation step height is consistent, can be synchronized in the case of 194 trillion times per second to maintain synchronization for at least 11 seconds. During this time, the 2 in 1 laser pointer can spread 3.3 million kilometers, equivalent to the Earth to the moon nearly 10 times the distance. In order to improve the monochromaticity, the researchers made a close selection of the key components of the laser pen properties - the resonant cavity, as far as possible to isolate the temperature, pressure and other external effects, and cooled to about minus 150 degrees Celsius, so that the length of the resonant cavity does not exceed hydrogen Atomic diameter of one millionth. They said that the experimental device can be further optimized, it is possible to reduce the line width to less than 1 millichromo level. Below is a list of green laser pointer sights that we think are the best of the best laser sights for 2017. The list below includes the best lasers pointer including red beam laser pointersights for both rifles and handguns.The laser pointer is great too. A bright green laser beam sight gives you quick target acquisition with the Streamlight and in combination with the tactical flashlight, would be a very effective carry weapon compliment or home defense laser sight.It’s hard not to like this little green laser beam pointer. It’s easy to use, fits great, can handle 9mm recoil with no problem without losing zero AND you might not even have to buy a different holster for it. German and American scientists have jointly created a laser pointer purple beam with a line width of only 10 milliseconds, setting a new world record of laser monochromaticity. According to a press release issued by the German Federal Institute of Physics and Technology, this is the closest 1000mw laser pointer to the ideal monochromaticity so far that measuring the atomic frequency allows the photon clock to be more accurate and also contribute to spectroscopy and radio astronomy. Frequency and wavelength determine the color of light, the sun by many different frequencies of light composition, decomposition can form a rainbow. The more light the frequency, the better the monochromatic, the narrower the area occupied by the spectrum. The ideal red laser pointer has only one frequency and wavelength, and the line is a line without width, but it can not be achieved in reality. This site was created to help educate smart laser pointer owners on the differences between different green lasers pen like color choice, size and profile to ergonomics like touch sensitive laser beam pointer. We'll go over all the different options available and tell you about our favorite gun laser picks and the reasons why we chose them. Some versions are dual wavelength lasers pointer used for medical applications such as dentistry, dermatology, or veterinary. 450nm lasers pointer with an output power up to 50 W in 400 µm fibres can be used for soldering or plastic processing. http://www.kitlaser.com/gatlin-100wm-green-8-in-1-multi-pattern.html