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Can anyone give me the definitions for the following laser terminology? These tend to be used on datasheets and I can't seem to find much discussion / use of them elsewhere: - Parallel Beam Divergence - Perpendicular Beam Divergence I'm pretty sure these give some kind of half angle for the...

If a laser has a duty cycle of something like 33%, does that mean that in terms of eye safety it is equivalent to a non-pulsed laser with 1/3 of the total power? To make things simpler, let's assume that the laser doesn't pulse at insane rates (let's say less than 200 hz) nor does it pulse for...

How safe/dangerous are line lasers? Let's take 100mw to be the example output power. Let's also suppose the laser is spread out using a lens (or some other standard optical piece that is used for non-scanning line lasers). If a 5mw dot laser is the safety threshold with a spot size of 1cm...