Old 12-19-2008, 04:06 PM #1
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Default Must filter out wavelengths shorter than 10,000nm

Is there a filter that is very transparant at wavelengths longer than 10,000nm?

It must not be passive anyware that this material's optical transmission is above 0%:



i need the rising edge of the filter to start at around 10,000nm, be relitivly transparant (75 - 80% at any point between 10,000nm and 12,000nm).

any ideas?
does co2 laser optics ring any bells?


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Old 12-21-2008, 12:16 AM #2
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Default Re: Must filter out wavelengths shorter than 10,00

Being a somewhat technical question you should ask it here http://groups.google.com/group/alt.l...schg&hl=en This is where Sam of Sams Laser FAQ hangs out. In the mean time while you are waiting for an answer you can poke around here http://www.edmundoptics.com/onlinecatalog/browse.cfm#
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Old 12-21-2008, 12:54 AM #3
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Default Re: Must filter out wavelengths shorter than 10,00

Wavelengths longer than 10,000 nM are in the realm of ZnSe. I don't have the curves for this material. It works well at 10,600 nM.

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Old 12-28-2008, 07:57 AM #4
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Default Re: Must filter out wavelengths shorter than 10,00

Look into silicon...
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Old 12-28-2008, 02:48 PM #5
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Default Re: Must filter out wavelengths shorter than 10,00

Why don't you let us know precisely what it is you're attempting.

Quote:
For example - if you came in here asking "how do I use a jackhammer" we might ask "why do you need to use a jackhammer"

If the answer to the latter question is "to knock my grandmother's head off to let out the evil spirits that gave her cancer", then maybe the problem is actually unrelated to jackhammers
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Old 12-28-2008, 09:47 PM #6
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Default Re: Must filter out wavelengths shorter than 10,00

Check this ebay store: http://stores.ebay.com/OmegaFiltersEbuyer2 These guys have every kind of filter/mirror/opitc that you could ever want. If it's not there check their website at https://www.omegafilters.com/index.php.
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Old 01-01-2009, 05:34 AM #7
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Default Re: Must filter out wavelengths shorter than 10,00

They don't have anything related to CO2. Look into some silicon mirrors. You can reflect the 10.6um very well and only partially reflect the visible or whatever else.
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