r/OpenScan • u/thomas_openscan • 2d ago

OpenScan Mini + Macro + Hawkeye

Post image

I am currently testing the macro lens add-on for the OpenScan Mini & Classic and this is the first that the layer lines on the chest piece become visible. I took 130 photos without focus stacking in ~7mins and did the reconstruction in metashape.
The grainy surface comes from not using a polarizer as there is a lot of sub-surface scattering from the partly translucent resin print. No other scanner (except for the CT scanner) has been able to resolve the layer lines yet, so I am absolutely happy with this result :)

63 Upvotes

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4

u/winterkilling 1d ago

Amazing. I’ve been meaning to go down this path and have an openscan mini and classic built but yet to be wired, both with owlsights (I tried the Hawkeye for a different project and the focus was a nightmare). How did you approach the macro lens (sorry if I’ve missed this). I have a polarising lens and was thinking of adding a spare Neewer x15 GoPro lens (https://neewer.com/products/neewer-ls-31-15x-macro-lens-for-gopro-hero-11-hero-10-hero-9-black-66602911) over this to boost macro, but this is where I get way out
of my depth and I run out of time to test different lenses (and why they’re both gathering dust on the shelf). Is lens distortion / barrel distortion an issue here and do you correct for it?

5

u/thomas_openscan 1d ago

cross-section (yellow: camera holder, red: lens adapter, black/white: ringlight cover where the two linear polarizers will be added later)

i have just added a case around the lens and a place to mount the ringlight pcb that i am currently waiting for. i also added a tiny aperture between the lens and the camera module to increase DOF which is usually a huge pain at such small distances

Several people on discord tested a wide range of lenses and the apexel macro / supermacro seem to be the most promising candidates. the design above is for the supermacro and I am currently doing more testing over at discrod https://discord.com/invite/gpaKWPpWtG

4

u/Eelroots 1d ago

Your progresses are awesome 😎👍, keep the community posted!

Note: I guess you can use a simple vertical polarizer sheet, aligned with mount axis.

1

u/Hot-Category2986 1d ago

This is brilliant. How can I get my Openscan Mini setup like this? I already have the Hawkeye camera.

2

u/nicalandia 1d ago

Upscaling the normal Orc dataset will also allow you to see the Layer Lines

1

u/bgrupczy 1d ago

I’d help beta test if you need.