FAR IR LED - 10 micron

I am looking for an emitter in the 10 micron range. I have searched for
LEDs but can't find anything quite that long. Any other type source
would be okay, but I prefer the emissions to peak in the 8-12 micron
range so I can operate efficiently. Am running from batteries.

Thanks in advance.

Jim

 

[Ian Stirling]

jim_nospam_beasley@yahoo.com wrote:

I am looking for an emitter in the 10 micron range. I have searched for
LEDs but can't find anything quite that long. Any other type source
would be okay, but I prefer the emissions to peak in the 8-12 micron
range so I can operate efficiently. Am running from batteries.

AIUI, there are no efficient emitters in this bandwidth, you're just looking
at filtered broadband sources.

 

[Spehro Pefhany]

On 28 Aug 2005 11:36:43 -0700, the renowned
jim_nospam_beasley@yahoo.com wrote:

I am looking for an emitter in the 10 micron range. I have searched for
LEDs but can't find anything quite that long. Any other type source
would be okay, but I prefer the emissions to peak in the 8-12 micron
range so I can operate efficiently. Am running from batteries.

Thanks in advance.

Jim

10 microns? You could use your hand.

There are some devices which are brighter than a black-body source,
but from what I can see they seem to be more in the particle physics
area than something that will run off reasonable sized batteries.


Best regards,
Spehro Pefhany
--
"it's the network..." "The Journey is the reward"
speff@interlog.com Info for manufacturers: http://www.trexon.com
Embedded software/hardware/analog Info for designers: http://www.speff.com

 

Thanks, Ian. I understand. What might be a good broadband emitter,
then? I suppose I can make a tradeoff in lost power at the unneeded
wavelengths. That may be unavoidable.

Jim

 

[Phil Hobbs]

Spehro Pefhany wrote:

On 28 Aug 2005 11:36:43 -0700, the renowned
jim_nospam_beasley@yahoo.com wrote:


I am looking for an emitter in the 10 micron range. I have searched for
LEDs but can't find anything quite that long. Any other type source
would be okay, but I prefer the emissions to peak in the 8-12 micron
range so I can operate efficiently. Am running from batteries.

Thanks in advance.

Jim


10 microns? You could use your hand.

There are some devices which are brighter than a black-body source,
but from what I can see they seem to be more in the particle physics
area than something that will run off reasonable sized batteries.


Best regards,
Spehro Pefhany

The blackbody (Planck) function increases with temperature at all
wavelengths, as well as shifting toward the blue with increasing T. Thus a
very hot object emits more 10-um than your hand, but you have to filter
pretty aggressively, since most of the power is at shorter wavelengths.

Cheers,

Phil Hobbs

 

[John Woodgate]

I read in sci.electronics.design that jim_nospam_beasley@yahoo.com wrote
(in <1125264814.079499.46880@g49g2000cwa.googlegroups.com&gt about 'FAR
IR LED - 10 micron', on Sun, 28 Aug 2005:

What might be a good broadband emitter, then?

An incandescent lamp? Maybe run dimmed.
--
Regards, John Woodgate, OOO - Own Opinions Only.
If everything has been designed, a god designed evolution by natural selection.
http://www.jmwa.demon.co.uk Also see http://www.isce.org.uk

 

[The Phantom]

On 28 Aug 2005 14:33:34 -0700, jim_nospam_beasley@yahoo.com wrote:

Thanks, Ian. I understand. What might be a good broadband emitter,
then? I suppose I can make a tradeoff in lost power at the unneeded
wavelengths. That may be unavoidable.

Jim

What you need is a Nernst glower:

http://www.chemicool.com/definition/nernst_glower.html

http://www.photonics.com/dictionary/lookup/XQ/ASP/url.lookup/entrynum.3478/letter.n/pu./QX/lookup.htm