19.1mm dia. x 25.8mm thick Optical Flat Window, 1/10 wave flat AR Coated HeNe

Description

Up for auction is a
Thick Window /Beam Steering Cylinder in perfectly new condition
.  Measures 19.1mm diameter x 25.8mm thick.  The AR coating peaks around the HeNe wavelength (<0.2%) but good in most of the visible as well (<~0.5%).
I believe the application for this was as a beam steering cylinder for a HeNe laser but the flat, better than 1/10 window faces make this a great general-purpose window as well.
As always,
your complete satisfaction is guaranteed
.  If not 100% satisfied with this you may return.  I have many happy customers, and would like you to become one as well.   For more general laboratory optics such as bandpass filters, ND filters, cylindrical lenses, and achromat lenses at equally fantastic prices, please visit
Sterling Resale Optics
.
Winning bid to pay .95 shipping within USA.   Save even more by combining shipping with my other optics auctions going on now.