this post was submitted on 06 Oct 2024
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An Open Source Mirrorless Camera You’d Want To Use (hackaday.com)
submitted 2 months ago by [email protected] to c/[email protected]
37 comments fedilink hide all child comments
 

cross-posted from: https://lemm.ee/post/44155947

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[–] [email protected] -1 points 2 months ago* (last edited 2 months ago) (1 children)

It would be super cheap to make a laser difraction grid. You could map the lense deformation because you know the lines on the grid are straight. This would be solely for mapping the properties of the lens / mount and how to handle defamation profiles. Once you dial in the lens you probably wouldn't need to run it again assuming it can id the lens when you mount it.

I would say you could use red green and blue lasers and look at convergence, But I'm not sure in any decent hardware that that would actually be off

Edit: you should note, iPhone already does this for face ID. It's not really that much of a stretch to make it go the other way.

[–] [email protected] 1 points 2 months ago (1 children)

“It would be” so you haven’t done this but speak confidently about it being cheap and accessible?

[–] [email protected] 1 points 2 months ago (1 children)

You can purchase laser pointers with grid diffraction grating right now with zero effort to DIY.

You can purchase house decoration style diffraction gratings which are a larger format but are intensely bright. They are however less portable.

You can follow a thought emporiums instructions on how to create diffraction gratings, which includes the software and the process,

And yes, I already own a 300 milliwatt laser with a diffraction pattern that would work for this.

[–] [email protected] 1 points 2 months ago (1 children)

And these things produce actually perpendicular lines?

[–] [email protected] 1 points 2 months ago

They have an incredibly high degree of accuracy. It's the same thing iPhones are using for face ID. And if you needed it to be easier it doesn't have to be straight lines as long as it's dots in known locations