Bath Interferometer parts
thingiverse
There's now a version 2 available with several useful improvements at https://www.thingiverse.com/thing:2843786. These parts can be used to create a Bath interferometer, which measures telescope mirrors effectively. The parts were designed specifically for a 15mm beam splitter, a 7.6mm diameter lens, and a 13.5 mm diameter laser pointer. The design was created in Fusion360, and the model will soon be published. It has been parameterized to make it easy to create holders of different sizes for lenses and lasers. Feel free to ask for specific sizes, and I can upload an STL file for you.
With this file you will be able to print Bath Interferometer parts with your 3D printer. Click on the button and save the file on your computer to work, edit or customize your design. You can also find more 3D designs for printers on Bath Interferometer parts.