The Spiral Light Baffle is a 1-1/2" od tube with baffling to permit a 1" id through. Pipe threads permit attachment to other baffles, or lens holder caps or lens holder plugs. Lens holders with pipe threads attach to baffles and can mount filter/lenses either with fine-threaded retainer rings, or metal set-screws, or simply press-fit. Pipe threads permit multiple assembly, so light-tight tubes can be constructed with integrated filters for low-ambient-light precision optics.

Using OpenSCAD, all dimensions are scalable. Tubes can be labelled/embossed with text strings to distinguish differences. Logo engraved on back.

OpenSCAD files are fully customizable--mount type, lens diameter, tube length, thread patterns-- though if adjusting threads, it took some iterations to find parameters that printed well on a Ultimaker2 with PLA plastic.

Plans to make more pipe-thread connectors--4-way cross, lens-holder with pipe-threads on both sides, mirror mounts with x/y fine adjust... The goal is to make a light-tight optics-bench experiment.

Ultimaker

Ultimaker 2

No

No

Default 0.4mm

20%

Pipe threads made with a fast, but not very smooth OpenSCAD function. They need a lot of cleaning before joining.

Lens-holder retaining ring is made with higher-quality thread library. Slow and lots of facets! But having trouble with Cura making the top and bottom threads thicker and then they jam. Perhaps chamfering will solve the problem.

This is my first OpenSCAD project. So the .scad file is pretty messy. I began with a lens holder from Customizable Lens Holder by jpearce, (thingiverse.com/thing:62693) and learned OpenSCAD from his example.