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Very good job David i am sure you can make with this device perfect clean color holograms.
I think it is also very easy to clean the laser beams with a spatialfilter, maybe it is tricky with backreflections.
Never get the beams so perfectly alignt as in this setup.
I can' t wait to make color holograms when i receive my devices.

Ok managed to see fringes in all three colors!!!, Fizeau interferometer with a nice chunky prism to divide light up so it’s not overlapping, needless to say this is exciting !

One step away from a portable micro color holo camera.

Another view ...

Good going Kristiaan and Dave!

Holomaker: Seems to also the blue diode produce fringes. Could you please tell us currents and aprox. temperature of the device? When I see your last posts I start to be impatient in waiting to receive it!
Kristiaan: Back reflection from spatial filter can destabilize diodes - it create external cavity, but when it is stable enough, it can also stabilize it, I hope that in this nice compact device this effect can be utilized.

We did a Lippmann direct image with this projector:

>Zilux Figura color photopolymer material, 450, 530, 640 nm. Film directly laminated onto a mirror.

Excellent to hear these lasers are actually making holograms now ! For seeing if my laser is staying single frequently ( or nearly), I use a Fizeau interferometer set up, easy to use, please try it on any laser! Pictured below is the current set up, mine is fancy cause I used a prism to separate out colors ( so they don’t overlap), but all thats needed for this test is a clean glass slide, a lens and a piece of paper ...

Good show Danny, how deep can you see into it? Check it w laser light!

https://youtu.be/PkSi7oiuy4w

Ok that confirms it , this light engine will make a color hologram ... low blue power 10mw, w a long exposure on Convestro. Very hard to resolve this color with the naked eye, camera actually sees it better! How often does that happen?