(06-11-2017, 04:52 PM)grepper Wrote: Mr Jan, Any idea it this thing is a better focus than what you are using? I know, you probably can't really tell just by looking at the web site.
It can focus the beam enough to light matches, whatever that means. (I know nothing about lasers).
Mr. Grepper, all you need to know is that laser is a diode emitting a narrow beam of colored light (red, blue or green). In US the power of laser pointers is restricted to 5 mW for safety reasons. It means that the energy consumption is very small and may be powered from battery for years.
For bevels not shorter than some 0.5 mm with reasonably good finish also the inexpensive laser modules provide quite good results. If the reflections are weak you can make the measurement in a darkened room.
Laser pointers are often used to illuminate distant objects with small bright spot. The laser beam is invisible in clean air, but when used on larger distances the laser beam scatters on dust in the air or on water droplets which makes the whole beam path visible. It is recommended to have it in an emergency kit.