Metrology Laser Reliability

greif

Involved In Discussions
#1
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?
 
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Hershal

Metrologist-Auditor
Staff member
Super Moderator
#2
First, both wavelengths and power should be calibrated so you know what you have.

Second, based on the description, I would go three months!

Hope this helps.
 
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