View Full Version : Question regarding laser beam width / spot size

David Fairfield
04-03-2011, 3:26 PM
Question-- what (besides focus or changing lenses) can cause spot size / beam width to change?


Rodne Gold
04-03-2011, 4:24 PM
A beam expander or collimator will change things.

Scott Shepherd
04-03-2011, 6:05 PM
Dirt on a mirror upstream.

Brian Montes
04-03-2011, 8:15 PM
There is a myriad of things that can affect the overall spot size. Maybe you can tell us the issue you are having or what you are trying to achieve.

David Fairfield
04-04-2011, 12:29 PM
More just a general question about how to keep the machinery tuned up, beyond the basic alignment and cleaning. Should lenses be replaced every few years? That sort of thing. Thanks!


Dan Hintz
04-04-2011, 1:06 PM
Lenses only need to be replaced when they're damaged... chipped, heavily scratched, lost AR coating (which I don't believe we have anyway), etc.