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Equipment Discussions >> Video and Electronically Assisted Astronomy

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chasing photons
member


Reged: 03/19/13

Loc: Minnesota
Another potentially groundbreaking image sensor?
      #5934827 - 06/22/13 03:36 PM

Could molybdenite eventually become the foundation for an image sensor that is five times more sensitive than currently available silicon-based sensors?

http://www.sciencedaily.com/releases/2013/06/130612133101.htm


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nytecam
Postmaster


Reged: 08/20/05

Loc: London UK
Re: Another potentially groundbreaking image sensor? new [Re: chasing photons]
      #5934892 - 06/22/13 04:12 PM

Sounds great - so x5 current CCDs with 50% QE equals 250% QE - WOW

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Zoomster
Vendor - Clear Sky Adventures
*****

Reged: 01/30/05

Loc: Tampa FL
Re: Another potentially groundbreaking image sensor? new [Re: nytecam]
      #5936061 - 06/23/13 09:35 AM

Um, yeah, I want one!

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Dragon Man
Carpal Tunnel
*****

Reged: 03/07/06

Loc: Snake Valley, Australia
Re: Another potentially groundbreaking image sensor? new [Re: Zoomster]
      #5936103 - 06/23/13 10:03 AM

Someone has to volunteer to buy one and test it for us.

Mark?


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PEterW
professor emeritus


Reged: 01/02/06

Loc: SW London, UK
Re: Another potentially groundbreaking image sensor? new [Re: Dragon Man]
      #5936436 - 06/23/13 01:49 PM

MoS2 another 2D material like Graphene. Lots of work on both ongoing, time will tell what they end up being used for. I understand that MoS2 might also be a useful gas sensor.

Cheers

PeterW


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CuriousOne
member


Reged: 01/22/13

Re: Another potentially groundbreaking image sensor? new [Re: PEterW]
      #5937379 - 06/24/13 01:18 AM

Plumbum Sulphide, Indium Antimonide offer far better sensitivity and range than CCD/CMOS, are on market for almost 100 years, but still, FPAs made from them only recently showed up, and only in military, guess why?

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ASTERON
Carpal Tunnel
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Reged: 11/24/07

Loc: ISRAEL
Re: Another potentially groundbreaking image sensor? new [Re: CuriousOne]
      #5938101 - 06/24/13 02:12 PM

Why ?

Edited by ASTERON (06/24/13 02:13 PM)


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ASTERON
Carpal Tunnel
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Reged: 11/24/07

Loc: ISRAEL
Re: Another potentially groundbreaking image sensor? new [Re: ASTERON]
      #5938130 - 06/24/13 02:27 PM

Hmmmm...
A Short check ( Vikipedia) shows that both InSb and PbS are good for detecting light in the infrared wavelengths ( InSb in the range 1-5 micron and PbS at 1-2.5 micron or 2-4 micron, depending on temperature).
Both Materials require cryogenic temperatures (use of Liquid nitrogen or highly cascaded peltier systems).

Maybe that's why they are not so popular with Camera manufacturers ?

Edited by ASTERON (06/24/13 02:28 PM)


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seryddwr
Innocent Bystander
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Reged: 02/19/10

Loc: La-la land.
Re: Another potentially groundbreaking image sensor? new [Re: CuriousOne]
      #5938246 - 06/24/13 03:44 PM

Quote:

Plumbum Sulphide, Indium Antimonide offer far better sensitivity and range than CCD/CMOS, are on market for almost 100 years, but still, FPAs made from them only recently showed up, and only in military, guess why?



Pros have been using them since the 80s at least. Very expensive, IR sensors that must be cryogenically cooled.


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Larry F
Carpal Tunnel
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Reged: 05/24/04

Loc: Westchester, NY
Re: Another potentially groundbreaking image sensor? new [Re: seryddwr]
      #5939433 - 06/25/13 10:14 AM

There should be some special recognition for the first guy who brings a liquid nitrogen tank to a star party!

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Dragon Man
Carpal Tunnel
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Reged: 03/07/06

Loc: Snake Valley, Australia
Re: Another potentially groundbreaking image sensor? new [Re: Larry F]
      #5939495 - 06/25/13 10:51 AM

Quote:

There should be some special recognition for the first guy who brings a liquid nitrogen tank to a star party!






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PEterW
professor emeritus


Reged: 01/02/06

Loc: SW London, UK
Re: Another potentially groundbreaking image sensor? new [Re: Dragon Man]
      #5939821 - 06/25/13 01:42 PM

Bring custard, single cream, chocolate powder and ginger jam and I'll run you off some liquid nitrogen ice cream...... Far more fun than just cooling detectors!

Cheers

PEterW


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CuriousOne
member


Reged: 01/22/13

Re: Another potentially groundbreaking image sensor? new [Re: PEterW]
      #5943363 - 06/27/13 04:13 PM

All my respects to wikipedia, but you meet PbS sensors in everyday life and 100% sure they are not cooled.

And regarding the "pros are using since 80s", can you post a link/name/model of manufacturer/array/etc? (P.S. I know one, it's name begins with T and ends with N )

For the liquid nitrogen flask - this is quite usual accessory on Overclocker parties, see no reason why not should became typical on star parties, too.


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ASTERON
Carpal Tunnel
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Reged: 11/24/07

Loc: ISRAEL
Re: Another potentially groundbreaking image sensor? new [Re: CuriousOne]
      #5947869 - 06/30/13 11:16 AM

are U sure they were PbS and nor CdS ?( Cadmium Sulphide). The latter is operable at RT.

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