Subject:
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Re: General IR question
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Newsgroups:
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lugnet.robotics
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Date:
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Tue, 14 May 2002 03:20:19 GMT
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Original-From:
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Rob Limbaugh <rlimbaugh@greenfieldgroup.com/avoidspam/>
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Viewed:
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660 times
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Someone has a site with a video of a robot they made. In the video, you can
see the two IR LED's blink. The site owner made a comment about what the
blinking was caused from.
Unfortunately, I don't remember the site address... I think the site had
projects using Killough and Syncro-Drive platforms.
----- Original Message -----
From: "Steve Baker" <sjbaker1@airmail.net>
To: <dan@flashfilmworks.com>
Cc: "lego" <lego-robotics@crynwr.com>
Sent: Monday, May 13, 2002 11:01 PM
Subject: Re: General IR question
> Dan Novy wrote:
>
> > In general, what's the difference between the IR "signal" that the
> > tower and RCX use to communicate and the IR energy used in thermal
> > imaging? Is it just a matter of frequency? If the RCX was pointed at
> > an IR camera, what what would it see?
>
> IR sensors (of the type used by the military for night operations for • example)
> operate over some fixed range of IR frequencies - some work in the near IR
> (or perhaps even somewhat into the Red end of the visible spectrum) - • others
> in the far infra-red where temperature is easier to sense.
>
> I'm not sure what frequency the RCX generates - but I'm told that it's
> visible even in most domestic camcorders - so it's probably in the near
> IR range. That's not really in the "thermal" range (although that's a
> vague term) - it's really light that's just a tiny bit too Red for your
> eyes to pick up.
>
> I've not checked the RCX - but I did try looking at the IRDA port of my
> palmtop in a friend's camcorder - and it was visible as a fairly bright
> dot when the room lights were dimmed just right.
>
> ----------------------------- Steve Baker -------------------------------
> Mail : <sjbaker1@airmail.net> WorkMail: <sjbaker@link.com>
> URLs : http://www.sjbaker.org
> http://plib.sf.net http://tuxaqfh.sf.net http://tuxkart.sf.net
> http://prettypoly.sf.net http://freeglut.sf.net
> http://toobular.sf.net http://lodestone.sf.net
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Message has 1 Reply:
Message is in Reply To:
 | | Re: General IR question
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| (...) IR sensors (of the type used by the military for night operations for example) operate over some fixed range of IR frequencies - some work in the near IR (or perhaps even somewhat into the Red end of the visible spectrum) - others in the far (...) (22 years ago, 14-May-02, to lugnet.robotics)
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