The range and visible distance of any laser designator will depend on several different factors. The first is the output power (mW), followed by the color of the laser. Both are important factors determining the visible distance of laser beam. Generally, green lasers are about 7 times brighter than any other laser at the same output power, so green is best for the same power. There's a big debate about which laser color is best and it does match preferences, but when it comes to brightness, green lasers are always 7 to 10 times brighter than any other laser color. At the same output power. That is, any 200MW green laser designator is at least seven times brighter than any other 200MW color laser.
When buying a green laser pointer, I think reliability is more important than quality and score. My search for a durable, powerful and reliable laser designator at a reasonable price is over. However, I solved the problem again. This product provides everything you would expect from a portable laser pointer. It has a wristband for added security. It's a big, heavy waterproof idea. The first mode I hypothesize is to focus a beam of light on a given region. In the more common Rayleigh scattering case, the efficiency of the Raman effect is inversely proportional to the 4th power of the wavelength. This means that for every 16 percent increase in laser wavelength, the number of two-photon photons inelastic decreases, and a 50 percent reduction in wavelength results in a 16-fold increase in signal strength. So obviously, lasers with shorter wavelengths are always the best choice, but things get complicated when we consider two other factors. The main challenge of Raman spectroscopy compared to fluorescence is that its signal intensity is relatively low, with most complex molecules excited in their ultraviolet and visible light. Therefore, most organic and biological samples must be excited in near infrared to prevent the Raman signal from being swamped by the fluorescent background. These competing effects create a strange dichotomy, in which a reduction in wavelength will produce greater signal intensity while increasing background noise (spontaneous fluorescence) is the most important factor in explaining the diversity of laser wave length D used in Raman spectroscopy.