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Did you know the isight does infrared?
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Grizzled Veteran
Join Date: Nov 2002
Location: London, UK
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Just discovered that today. now trying to figure out what frequency it will work at. I'm tempted to build an IR illuminator using leds at 920nm, which is invisible to the naked eye. Might be an interesting project for nightvision experiments.
J.
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By all means let's be open-minded, but not so open-minded that our brains drop out - Richard Dawkins
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Grizzled Veteran
Join Date: Jun 2001
Location: London'ish
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How do you mean?
If you mean, will it pick up Infra red, then yes it does, but then so does just about any form of video camera. But the colour is nearly always interpreted wrong. Easily demonstrated by operating an infra red remote control in front of the cam and viewing the results on screen. You will clearly see what appears to be a white light flickering on and off.
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The worst thing about having a failing memory is..... no, it's gone.
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Forum Regular
Join Date: Sep 2001
Location: .be
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Yes, pretty sweet. Found out about it when trying out iGlasses.
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Moderation is a fatal thing. Nothing succeeds like excess.
Oscar Wilde
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Admin Emeritus  Join Date: Oct 1999
Location: Zurich, Switzerland
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All CCD image sensors are responsive to infrared. Every video camera made in the past 20-30 years is sensitive to infrared, unless it was equipped with an infrared filter.
tooki
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Grizzled Veteran
Join Date: Nov 2002
Location: London, UK
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Guess other people did know. I'm not worried about the colours etc, I'm just thinking now of building an illuminator and seeing if it will actually work for some kind of nightvision.
I have an IR filter for my regular camera, for taking IR stills, so I put that over a maglite head and you could see it lighting up whatever I shone it at. Just something I hadn't seen mentioned anywhere else.
Cheers,
J.
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By all means let's be open-minded, but not so open-minded that our brains drop out - Richard Dawkins
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Addicted to MacNN
Join Date: Oct 2001
Location: Yokohama, Japan
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Um, talking about the "color" of infrared is meaningless. We can't see it; therefore it has no color.
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Grizzled Veteran
Join Date: Nov 2002
Location: London, UK
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Originally posted by wataru:
Um, talking about the "color" of infrared is meaningless. We can't see it; therefore it has no color.
True, but if you have a colour camera it's possible to see an image in false colour under infrared light. In the past I've done some nice colour infrared photography.
I didn't mean that you could see the infrared as a colour.
J.
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By all means let's be open-minded, but not so open-minded that our brains drop out - Richard Dawkins
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Posting Junkie
Join Date: Mar 2004
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Originally posted by wataru:
Um, talking about the "color" of infrared is meaningless. We can't see it; therefore it has no color.
Just because humans can't see it, it doesn't mean that it's not a color.
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Admin Emeritus Join Date: Oct 1999
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Originally posted by Freeflyer:
Guess other people did know. I'm not worried about the colours etc, I'm just thinking now of building an illuminator and seeing if it will actually work for some kind of nightvision.
Yup, it's been done before, and many Sony camcorders and digital still cameras actually have IR emitters built in for one of the Super Nightshot modes.
tooki
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Professional Poster
Join Date: Mar 2002
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"Rays of light are not coloured." - Isaac Newton
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Fresh-Faced Recruit
Join Date: Jan 2005
Location: Lake Oswego, OR
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IR can be interpreted as any color, it just depends on the camera. depending on the camera IR could be red, green, blue, anything. sometimes depending on the camera a certain frequency can be user pre-defined to show up as a certain color.
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Dedicated MacNNer
Join Date: Feb 2003
Location: Boring Boston
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Color is defined by what you can see, in order to see you must be able to distinguish it from other "colors". So, if you can see infrared, it's a color (it would be a very, very dark red...). If you can't, then it's not a color. Now, if I could only see those infrared stars..... 
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