Lidar-Lite shield tube

Shield tube to block scattered outgoing and incoming light from IR LIDAR Lite.

Maker/DIY

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Description

The Lidar-Lite from PulsedLight is neat widget, but I found my unit sprays quite a bit of IR outside of the main axis of the collimated laser beam; some internal scattering maybe. As a consequence, a nearby surface can be detected by scattered illumination, even when it is not on-axis. Also, it wouldn't hurt the receiver to have a sun-shade in place, so I designed this. Wall thickness is 0.8 mm and with a 0.4mm print head, it works best if you set infill to 0%. OpenSCAD model included.

UPDATE: v4 has more baffles (# of rings is a parameter), tighter ID of baffle rings, and improved mechanical fit to Lidar case.

Note that many plastics are translucent at 900 nm, and in fact I could see the beam through the wall with an IR camera before I painted it. For this to work as intended, you need to paint the inside with an opaque flat black paint ( I used "Angelus Brand Acrylic Leather Paint".) This can be tricky to apply given the internal baffle rings, but an old toothbrush worked nicely.

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Comments

Mini  sushi chops trans more centeredSushi Desires added this to the Curios collection ago
Mini  sushi chops trans more centeredSushi Desires added this to the Upgrades collection ago
Mini  sushi chops trans more centeredSushi Desires added this to the Electronics collection ago
Mini jb computerjbeale published this design ago