PBS Cube Test Results
I have purchased many PBS cubes over the past decade from a variety of sources and I've found high variability of quality among vendors. eBay is particularly bad with many vendors sending the wrong cube or cubes that just don't work well. Sadly, I don't have the high end Thorlabs or Edmund Optics cubes here to test as those are darn expensive for a home builder. I thought I'd share what I could so that someone else may find it useful in choosing the best cube for their polarization-combine requirements.
-David
"Help, help, I'm being repressed!"