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What's the easiest and most affordable way for obtaining UV reflectance images?

Started Apr 24, 2021 | Questions thread
ProfHankD
ProfHankD Veteran Member • Posts: 9,147
DRAM as an imager

Johannes Zander wrote:

Enginel wrote:

ProfHankD wrote:

Yup, quartz lenses are the "right answer." That's why old EPROM chips used to be so expensive: to get enough UV to erase 'em, they needed a little quartz window and a ceramic package to mount it in.

Has someone crazy enough used them as an image sensor?

MOS DRAM would be a better choice I think. But you have to etch the top away.

https://en.wikipedia.org/wiki/Cromemco_Cyclops

That's interesting. I did a lot with NorthStar Horizons back in the day, when they were Chevys and Cromemcos were Cadillacs, but I don't recall ever seeing a Cyclops. However, my first home machine was a HeathKit H8, so it's possible that I was just a tad too late to see those.

My first digital imager was actually a CDS cell strapped to a HIPL0T DMP-4to make a scanner. I actually got fairly decent resolution out of my little kludge, monochrome only. I think I still have it somewhere too.

So, are there any easily-windowed DRAM parts still in production?

I did find a straightforward (if unpleasant) way to remove a plastic case , but I'm not sure it leaves the die functional, and I'd need to bond wires to it and repackage it. Here 's a more official way.

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