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FeynmanFan
professor emeritus
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Reged: 02/18/11

Loc: N Colo front range
Potential new imaging technique? new
      #5943724 - 06/27/13 08:00 PM

Found this in MIT Tech Briefs. My math is rusty enough that I got about 5% of this, but it intrigued me enough that I thought I'd post it here. Comments? web page Download the PDF.

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mark cowan
Vendor (Veritas Optics)
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Reged: 06/03/05

Loc: salem, OR
Re: Potential new imaging technique? new [Re: FeynmanFan]
      #5943955 - 06/27/13 10:50 PM

I'd like to see more about that...

Best,
Mark


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derangedhermit
Pooh-Bah


Reged: 10/07/09

Loc: USA
Re: Potential new imaging technique? new [Re: mark cowan]
      #5944055 - 06/28/13 12:10 AM

You can get a feel for it without most of the math at the wikipedia page "Coded aperture" and a NASA list of the astronomical instruments using such technology. At least I think it's the same or similar thing. It's been used where you can't build a lens, like x-rays and gamma rays, and for very low S/N ratio radio environments.

Note the comment at the NASA site:
With six operational instruments, coded aperture imaging in astronomy appears to be at its culmination point. The future is with new imaging techniques such as lobster eye telescopes and multi-layered super mirrors.

"Lobster eye telescope" Roger Angel turns out to be a very creative guy.

The only visual astronomy use I can think of is you could use it to try to beat seeing for imaging, but it seems a stretch.


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Crayfordjon
Vendor - Zerochromat
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Reged: 06/17/09

Loc: UK
Re: Potential new imaging technique? [Re: derangedhermit]
      #5944145 - 06/28/13 01:57 AM

The human brain is not really a computer as we unterstand it, it is something more, it gives us conscious awareness; a computer has none.

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careysub
Carpal Tunnel
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Reged: 02/18/11

Loc: Rancho Cucamonga, CA
Re: Potential new imaging technique? new [Re: FeynmanFan]
      #5948458 - 06/30/13 06:19 PM

This seems related to light field imaging:

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

https://graphics.stanford.edu/projects/lightfield/


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kw6562
Authoritative Ignoramus
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Reged: 06/25/08

Loc: MA
Re: Potential new imaging technique? new [Re: careysub]
      #5948755 - 06/30/13 09:52 PM

Coded aperture imaging is fascinating, IMHO. We are assisting with the construction of a coded aperture X-ray spectrometer to be used on the OSIRIS-REx asteroid sample return mission (REXIS link).
--Keith


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Geo.
Carpal Tunnel
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Reged: 10/01/08

Loc: Upstate NY
Re: Potential new imaging technique? new [Re: Crayfordjon]
      #5950961 - 07/02/13 09:23 AM

Quote:

The human brain is not really a computer as we unterstand it, it is something more, it gives us conscious awareness; a computer has none.




Well, maybe true this week.....


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iluxo
sage


Reged: 09/23/08

Re: Potential new imaging technique? new [Re: Geo.]
      #5952197 - 07/02/13 10:32 PM

It's the theoretical basis behind how the Lytro camera works.

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