Re: infrared dog

["Lee S. Kilpatrick (Mr. Breeze)" <leekil@xxxxxxx>]

someone wrote:

> In terms of the Sony camera with "total darkness mode" infrared, I saw
> the pic of the dog, and noticed that it was greenish in color. Is this
> possibly similar to the military style night vision goggles? I read a
> little piece on them that indicated that some types of night vision
> actually had an infrared emmiting device on them for signaling and even
> navigating in the absence of ambient light. I realize that infrared and
> "night vision" aren't the exact same thing, although related. Just a
> curiosity question.

and got a reply:

> Observing the 'red eyes' of the dog -which appear green- i tend to agree.
> The camera must have an infrared light source. This light is reflected in
> the dogs eyes as visible ligt of a flash would be reflected, too and would
> appear red then. 




The Sony infrared darkness stuff seems similar to "nightvision" from
what I have seen; if you use it only and in regular "color" mode,
stuff looks kind of eerily greenish.


HOWEVER, the dog's eyes being green seems to have nothing to do with
that.  Humans get "red eye", animals get "green eye" (at least for
cats & dogs that I have seen).  This is observable with normal flash
photography using visible light.  I assume it is the same effect going
on with infrared.


	Lee

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