On Wed, Jul 26, 2006 at 01:55:02PM +1200, Al Muckart said:
On Wednesday 26 July 2006 12:38, Mark Foster wrote:
Of course due care should be taken to make sure theres no active laser emmitters on the other end of the feed, but beyond that, nice to be protected. Recommendations from the floor?
I've never seen people working on fibre using goggles or anything like that. Basic common sense seems to serve.
Our fibre guy here notes: -- With the power levels we are using goggles are not required. Our guys are trained not to stare at the end of a fibre but not withstanding that the power level is such that no issues should occur. Like with a class 1M laser (equivalent of the old Class 3A) even with a safety factor of 10 it is stated you would have to stare at the fibre end from a distance of 150mm for over 100 seconds (haven't checked those figures so it is something like that) before there was a chance of damage to the eye. This is not a natural thing to do. Our lasers are in the lower end of Class 1M However If you are using some form of magnification (ie endoscope) then you would be an idiot to stare into the fibre with out 100% confidence that that there is nothing hooked to the other end. -- Cheers Si