Light shaping Holographic Diffuser 1" dia. 20 deg. mounted Edmunds 54-496

Description

Holographic diffuser made by Physical Optics Corp. for Edmund Optics.
These 20 degree versions have seen better days. These are poly-carbonate and not the fused silica versions
that are 0 each.
Some of these have odd clear center circles in them and some have speckle like patterns on the back
side or both. The nicer ones will be sold first. I shined a laser through them and these discrepancies don't seem to affect anything. Same diffusion speckle pattern no matter where I put the beam on them.
I have 6 of these, 4 in original boxes.
See my other sales for the 10 and 5 degree versions.
I combine ship to keep costs down.
See my alternate store by seller "mebe3d" for many more photonics items.