I have a couple machines using Teletrac/Axsys 150 circ. pol. interferometer lasers. These seem to be a pretty poor brand , lasting 6 months to 2 years. I have other machines using HP lasers which last decades!.
My laser repair guy has suggested used SP-117 or SP-117A type lasers or new Thorlabs HRS015 ( https://www.thorlabs.com/newgrouppage9.cfm?objectgroup_id=5281&pn=HRS015 ) stabilized HeNe lasers (both of which would need a beam expander and change to cir.pol).
Question: How reliable are these lasers? Anyone use them for an extended period?
My laser repair guy has suggested used SP-117 or SP-117A type lasers or new Thorlabs HRS015 ( https://www.thorlabs.com/newgrouppage9.cfm?objectgroup_id=5281&pn=HRS015 ) stabilized HeNe lasers (both of which would need a beam expander and change to cir.pol).
Question: How reliable are these lasers? Anyone use them for an extended period?