Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!usc!elroy.jpl.nasa.gov!peregrine!ccicpg!legs!ssi!tom
From: tom@syssoft.com (Rodentia)
Newsgroups: sci.electronics
Subject: Re: IR Reception - Modulation and Quality
Message-ID: <1991May7.052400.2842@syssoft.com>
Date: 7 May 91 05:24:00 GMT
References: <2766.27E40773@ofa123.fidonet.org> <159639@felix.UUCP> <237@tdatirv.UUCP> <10162@plains.NoDak.edu>
Reply-To: tom@syssoft.com (Rodentia)
Organization: Systems & Software, Inc., Irvine, CA
Lines: 19

In article <10162@plains.NoDak.edu> csmith@plains.NoDak.edu (Carl Smith) writes:
>In article <237@tdatirv.UUCP> pa1@tdatirv.UUCP (Pat Alvarado) writes:
 [stuff deleted]
>But I have not been able to find a source of this IR filtering plastic.
>But I haven't looked to hard... :)
>
>Carl D. Smith Jr.
>csmith@plains.NoDak.edu
>Electrical and Electronics Engineering
>North Dakota State University, Fargo, ND

Try a piece of exposed (dark) color film negative.  That should help.
(suggestion courtesy of "Modern Electronics" (or whatever it's called
nowadays), Forrest Mims III column)
-- 
Thomas Roden                                      | tom@syssoft.com
Systems and Software, Inc.                        | Voice: (714) 833-1700 x454 
"If the Beagle had sailed here, Darwin would have | FAX:   (714) 833-1900
come up with a different theory altogether." - me |