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PrintedLabs – 3D printable optical experiment equipment
- thenobsta 2y agoRelated cool diy-ish optical stuff... A friend sent me this simple design for a raman spectrometer [1]. And some 3D-printable cage optics for when alignment is really important [2]. [1]: https://hackteria.org/wiki/images/a/a0/MobPhone_RamanSpec_2021.pdf https://hackteria.org/wiki/images/a/a0/MobPhone_RamanSpec_20... [2]: https://www.sciencedirect.com/science/article/pii/S2468067217300421 https://www.sciencedirect.com/science/article/pii/S246806721...
- eternityforest 2y agoI remember that paper! I wonder why they aren't using modulated light? It seems like an ESP32 camera could handle everything pretty cheaply, why is this not a thing you can just buy for $50 on Amazon yet?
- elephant81 2y agowhat is the best plastic to print these lenses from? I've found over time all of the clear prints I've don't suffer from UV degradation.
- InDubioProRubio 2y agoTRIZ says to solve it with ablateable materials- thin foilsheets with a evaporating binding agent - there are uv-resistant plastics https://topas.com/uv-transparency/ https://topas.com/uv-transparency/ even transparent ones, but they are not printable. Actual recommended technique: grind it https://hackaday.com/2023/11/16/a-3d-printed-grinder-for-printed-lens-blanks/ https://hackaday.com/2023/11/16/a-3d-printed-grinder-for-pri...
- skybrian 2y agoIt’s for teachers and their students, so presumably they don’t need it anymore after the class experiment is over and durability isn’t a concern? And they could always print it again.
- dekhn 2y agoI don't think this project has you printing lenses- it wouldn't really make sense. It's very time consuming to print lenses. If you are going to do this, it makes more sense to print a mold and then cast resin (even then, this only really makes sense if you need a highly custom shape and are making multiple copies). See https://www.instructables.com/Making-Custom-Lenses/ https://www.instructables.com/Making-Custom-Lenses/ https://formlabs.com/blog/creating-camera-lenses-with-stereolithography/?srsltid=AfmBOopW_SBXZ8RwxgW8k2s0CKv8gNT-Rn9d57vRjKRsqmrOM95BGiBt https://formlabs.com/blog/creating-camera-lenses-with-stereo... https://www.instructables.com/Resin-Casting-Lenses/ https://www.instructables.com/Resin-Casting-Lenses/ i would use UV-resistant epoxy casting.
- nativeit 2y agoTangentially related: https://openflexure.org/ https://openflexure.org/
- amelius 2y agoVery cool, but I wonder how far you get with something like this: https://nl.aliexpress.com/item/1005004262524839.html https://nl.aliexpress.com/item/1005004262524839.html
- dekhn 2y agoIt's not motorized and motorizing that type of stand is painful (there is at least one paper that shows it's possible; I tried it and the results were not great: https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0088977 https://journals.plos.org/plosone/article?id=10.1371/journal...)
- amelius 2y agoWhat was the biggest challenge? I suppose you get some unpredictable backlash in that flexible shaft.
- dekhn 2y agoYeah the flexible shafts were terrible. I'd get highly variable movement even when making movements in only one direction (IE, home to Y 0, then only move positive ). They were so bad I tried to find ways to mount the steppers directly on each axis, which means the Y stepper is hanging out in air putting a lot of weight directly on the Y stage. Instead, i switched to cloning stages like this: https://www.asiimaging.com/products/stages/xy-inverted-stages/ms-2000-xyz-automated-stage/ https://www.asiimaging.com/products/stages/xy-inverted-stage... but I used off-the-shelf (well, amazon) linear rails, off-the-shelf (stepperonline) steppers, and 3d printed (or machined aluminum) frames. Works much better.
- nbernard 2y agoFor those interested, there is also OpenUC2 on this niche: https://github.com/openUC2/UC2-GIT https://github.com/openUC2/UC2-GIT It would be interesting to see how the two systems compare.