I've created two fringe images - one of a laser diode that's able to make holograms which outputs 5mW.
The second laser outputs 20mW and so far I've not been able to make a hologram with it.
I had a look at how to make fringe patterns to check the coherence of the lasers, and this is what I finally came up with:
Is it possible by comparing the two images to say that the 20mW laser should be able to make holograms, and I've just messed the picture up somehow?
I think if the coherence distance of the beam is low and bad for holograms, the fringes would be close together relative to a better hologram laser?
Any help would be much appreciated!