Quote:
Originally Posted by rusnak
There is none. Lasers are very useful in science, medicine, industry, transportation, etc but there really is zero use as a flashlight unless somehow the light can be transformed into a broader spectrum.
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The laser based lights convert the laser light internally to white light by conversion using a phosphor. This makes the light incoherent and adds many wavelengths. So the light coming out of the flashlight is NOT a laser any longer. You can make a hand held search light this way, with a beam that can go out 5x further without spreading significantly. This is something that previously would have required large optics to achieve.
Again, laser headlamps in cars are a reality today. No, they are NOT laser beams going down the road. And no, you can't burn paper with the laser headlamps either.
