Inexpensive Infrared Video

[Michel Wurtz - LTE <mw@xxxxxxxxxxxxxxxxxxxxx>]

For his birthday, my jungest son received a toy video camera (to
be plugged in a TV set or a VCR - it cost around 50$ and works with
standard AA batteries).  While he was playing, I noticed that some
dark evergreen in the room looked clearly white.

So I tested the camera with a pseudo infrared filter (just made
with a Wratten red 29 + Wratten blue 47B + Green 58 : you can
look the sun through it -- i have no 87c or 89b on hand !) and
it worked well.

In fact, the camera seems to be essentialy infrared sensitive :
you got the IR effect even without filtering.  The only thing to
add will be a portable monitor (same weight and price than the
video camera itself :-) and you will have a infrared previewer.

Did someone test something like that (I know that W.J. Markerink
uses nightvision equipment with same results) ?

-- 
Michel Wurtz	ENGEES - Laboratoire Territoires & Environnement
		1, quai Koch - BP 1039, F-67070 STRASBOURG cedex
		Tel: +33 3.88.25.34.62    Fax: +33 3.88.37.04.97

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End of INFRARED-PHOTOGRAPHY Digest 277
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