Eric, I just used two pcs of Acrylic plate stock...at about 13mm thickness. The reason for such thickness is ridigity. I have used less thick stock....but have seen some flexing with thinner material....and clear acrylic allows for viewing of prism position. Simple !! I takes a steady hand to lower the top piece vertically....and to not disturbe the prism position....but B4 full clamp force is applied....reposition can be done !
BEAM
Beam Axiom #1 ~The Quantum well is DEEP ! Photons for ALL !!
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Beam Axiom #2 ~Yes...As a matter of fact...I DO wear tinfoil on my head !!
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Beam Axiom #3 ~Whe'n dout...Po ah Donk awn et !!
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Beam Axiom #4 ~A Chicken in every Pot, and a Laser Lumia in every Livingroom !!
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Beam Axiom #5 ~"Abstract Photonic Expressionism"....is "Abstractonimical" !!
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Beam Axiom #6 ~ "A Posse ad Essea" ~ From being possible to being actual ...is the beam target !