Re: DPSS Laser Gloat!
Posted: Mon Jul 02, 2012 1:48 pm
Plain aluminum takes a big dive in reflectivity below about 400-450nm. I can vaporize it right off the surface of the glass. There are UV enhanced aluminum coatings but they still only reflect about 91%. Dielectric is about the only way to efficiently move the beam around at about 99.75%. They are only $125 a piece at thorlabs!