I am trying to do a simple reflection hologram. I have purchased several laser pointers on ebay, and 3d printed some jigs to hold the laser pointer and the film upright. The film I am using is the litiholo self developing C-RT20 film.
The laser modules I am using are just from ebay. 5mw red 650nm. They started with a line lens, but it screwed off to give the laser a somewhat flashlight shaped beam, which from my understanding is correct.
Here is an album with my setup as well as results in direct and indirect lighting.
I exposed for 4 minutes, and as you can see from the line across the bottom of the film, it did in fact get exposed (i.e. the darker part was obscured by the holder and didnt get exposed).
Anyone have any tips? Thanks in advance.
I would suggest that you find a solid floor such as a cement basement or garage floor. Then get a metal plate and place laser, plate holder and object on it. Then use hot glue to secure the laser, plate holder and object to the metal plate. If you place the metal plate on a bed of sand the metal plate will also be secure. I would also find a way to secure the plate in the holder - if you tap the plate with your fingernail while in the holder it must not make a ringing noise. Don't forget to offset the laser from directly pointing to the plate.
The final point is that the laser may not be coherent. To test this, I'd suggest simply gluing coins to the back of the plate holder - not too strongly so you can pop the coins after exposure.