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Picture of Prism Holder for Rainbow Portraits

I was inspired by the rainbow portrait trend to create a tool for precisely positioning a prism. This 3D printed prism holder cradles the glass while providing freedom to rotate for that perfect angle. The holder can be mounted on a c-stand or tripod, and comes together quickly with the attached STL files and a couple of nuts and bolts from the hardware store. Although I created it as a photography tool, it could also be used for physics demonstrations.

Step 1: 3D Design & Printing

Picture of 3D Design & Printing

I designed the prism holder in Tinkercad, which is free and easy to use. You can copy my design and alter it to fit the exact dimensions of your prism, or to make improvements.

If you'd prefer to print the holder as-is, you can find the STL files attached to this step, on Thingiverse, and you can also export them from Tinkercad too.

I printed out one of the long spanner piece and two each of the round pieces.

Print settings:

  • Rafts: No
  • Supports: No
  • Resolution: .2mm
  • Infill: 20%
Looks great! Differently sized and shaped prisms can give a good variety of rainbow patterns. With this technique, you could likely make a good variety of mounts.
Ocelotsden3 months ago
Very nice! One of these days I need to get a 3D printer, the possibilities are endless.