[photo-3d] Cold cathode tubes...

[ers <ers@xxxxxxxxxxxx>]

I emailed Digikey and asked for any radiation specs. My guess is that this 
country is so heavily regulated for xray emitters that this is a complete non 
issue, but I did ask.

Also, in addition to the OP-3 filter screening out 98% of UV (calculated for 
solar radiation), the viewer has a translucent diffuser filter 1/8 inch thick, 
plus two coated achromats (each lens has dual achromats and an air space). I 
don't think UV could be an issue here either.

BTW I also stuck an OP-3 shield on my King's Inn viewer, which has fluorescent 
illumination (it also had the lenses replaced with achromats, so it's actually 
useful-- the original lenses in the King's Inn are about as bad as they get.

Elliott