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Would this work, if not could you link me to something that would Hi. I think Tony meant to say he uses a first surface convex mirror instead of saying "lens". This works best as all lenses introduce some noise into your hologram and usually need spatial filtering if used. But, for a simple...

I'd like to you my Hene laser to create simple Denisyuk Hologram. But I have no Idea what inexpensive lens to use to illuminate the 5" square plate. I've seen people use concave mirror, double concave lens, microscope objective lens. Can I pick up any regular degular version of these from...