Light Shaping Diffuser

[alan.bogana]

Hi everyone,

I'm a bit struggling in finding a good way to display some transmission hologram (with the light source being 3-4 meters away), I did some tests with some Light Shaping Diffusers but I keep obtaining a very "grainy" light diffusion (even by using two sheets together, and in some cases just blurry replays). I wonder what I'm doing wrong... Any advice on how properly use to them for displaying holograms ? My best results so far have been by using double convex lenses, but with unpleasant fringes around... (I also tried a double convex lens with a diffuser but with same result...).

Cheers
Alan

[John Klayer]

I use the Luminit light shaping diffusers to display small transmission holos from a few inches away with good results. I also got a pretty good image with a piece of scotch tape for a diffuser. For bigger ones you need a space filter or bare laser diode. What comes out of a fiber is pretty clean too.