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Old 15th Jun 2008, 09:16
  #15 (permalink)  
Join Date: Dec 2001
Location: England
Posts: 1,384
This is worth a read..

"The Effects of [email protected] illumination on Operational and Visual Performance of Pilots During Final Approach"

It says that "illumination of flight crewmembers with [email protected] radiation > 0.5uW/cm^2 is unacceptable"

If I did the sums right...

A 500mW output [email protected] spread over a 1 meter diameter spot would be around 64uW/cm^2. Thats 128 times the acceptable level.
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