[Laser] Re: Laser digest, Vol 1 #67 - 3 msgs

Fri, 9 Aug 2002 14:53:35 +0530

Most of the corning glass will block UV. If 1mm blocks by 90% the 2mm will
block 99% and 3mm will block 99.9%. You should not used fused silica or
quartz glass which is transparent to UV. Also UV has an spectra so which UV
you are talking about? Murcury lamp UV is easily removed by window glass of
5mm thickness. However, 350nm downwards is all UV. You can also use colored
glass of RED, YELLOW, or EVEN GREEN, but not blue or voilet as they are near
UV. You can also try the slide making glass used by the doctors,
pathological laboratories. It will not let UV go through. You can use many
to block more UV. Camera lese will not let UV go through easily unless they
are of quartz (very unlikely as quartz is 10 times expansive and frazile and
no one will waste money for you unless you are paying for it)

Look at the www.photonicsspectra.com/  for more suppliers or get a directory
of suppliers from them. You can also try EDMUND Scientific through web and
call for their booklets.

Let me know if this info was of any use.

Shyam Sunder Tiwari, Ph. D.
Managing Director
Sensors Technology Private Limited
AM-51 Deen Dayal Nagar, Gwalior, MP 474020, India
Tel: +91-751-470680 Fax: +91-751-545716 Email: [email protected]
----- Original Message -----
From: <[email protected]>
To: <[email protected]>
Sent: Friday, August 09, 2002 1:31 PM
Subject: Laser digest, Vol 1 #67 - 3 msgs

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> Today's Topics:
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>    1. UV Sheet??? ([email protected])
>    2. Re: UV Sheet??? (Thomas Upton)
>    3. grating? (KD7JYK)
>
> --__--__--
>
> Message: 1
> To: [email protected]
> From: [email protected]
> Date: Thu, 08 Aug 2002 16:08:03 -0700 (PDT)
> Subject: [Laser] UV Sheet???
> Reply-To: [email protected]
>
> A while back I bought a sheet of IR lexan.  This sheet
> is black in appearance and blocks 99.9% of light
> visible to the human eye while passing IR.
>
> I am in need of an equivelent in the UV range.
> Searching the internet reveals IR filters, which block
> UV!  This won't work, I need somethig that blocks most
> visible light and passes UV, the equivelent of a very
> dark black light but in a flat material I can cut
> lenses from.
>
> I have found UV bulbs, but they look like a white light
> with a blueish tint to them when lit, I need something
> that appears almost black or a very dark almost
> invisible purple to the human eye.
>
> Is there anything out there on the market?
>
> What would something like this be called?
>
> What/Where should I be looking?
>
> Kurt
>
> --__--__--
>
> Message: 2
> Date: Thu, 08 Aug 2002 17:15:40 -0700
> From: Thomas Upton <[email protected]>
> To: [email protected]
> Subject: Re: [Laser] UV Sheet???
> Reply-To: [email protected]
>
> A question for all the laser list....  would not a diffraction grating
> tuned to "Beyond Violet" ie., the UV, do what KD7JYK is asking for?
>
> Tom Upton  AD6N
>
> [email protected] wrote:
>
> > A while back I bought a sheet of IR lexan.  This sheet
> > is black in appearance and blocks 99.9% of light
> > visible to the human eye while passing IR.
> >
> > I am in need of an equivelent in the UV range.
> > Searching the internet reveals IR filters, which block
> > UV!  This won't work, I need somethig that blocks most
> > visible light and passes UV, the equivelent of a very
> > dark black light but in a flat material I can cut
> > lenses from.
> >
> > I have found UV bulbs, but they look like a white light
> > with a blueish tint to them when lit, I need something
> > that appears almost black or a very dark almost
> > invisible purple to the human eye.
> >
> > Is there anything out there on the market?
> >
> > What would something like this be called?
> >
> > What/Where should I be looking?
> >
> > Kurt
> > _______________________________________________
> > Laser mailing list
> > [email protected]
> > http://mailman.qth.net/mailman/listinfo/laser
>
>
>
>
> --__--__--
>
> Message: 3
> From: "KD7JYK" <[email protected]>
> To: <[email protected]>
> Date: Thu, 8 Aug 2002 19:34:58 -0700
> Organization: Rosetta Proving Grounds, Facility 406
> Subject: [Laser] grating?
> Reply-To: [email protected]
>
> What is a difraction grating?
>
> Kurt
>
> ---
> Ross Technologies Signals Intelligence Division
> Rosetta Proving Grounds
> (775) 629-0831 ext. 406
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> End of Laser Digest