Just replaced the IR laser diode of the module by a red one from a DVD drive. The optical path through the lens can now be easily seen.
The laser diode is modulated by a function generator.
!!! ALWAYS WEAR LASER SAFETY GOGGLES WHEN PLAYING WITH LASERS !!!
!!! INTENSE LIGHT CREATED BY LASERS CAN DAMAGE YOUR EYES !!!
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µGUI - my open source GUI project:
http://www.embeddedlightning.com/ugui/ !! INFO !!
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