The Sony DCR-TRV110 Nightshot switch can be jammed half-way between "Off" and "On" which disables the infrared LEDs and allows both visible light and infrared light to hit the CCD.
This is handy for shooting in low-light conditions, when you want to use all the available light possible, but don't want the distracting "beam" of infrared shooting from the front of the camera.
Searching Google for infrared webcam hack turns up articles on how to enable webcams to receive infrared.
00:00 Sony DCR-TRV110.
00:05 Stories about infrared privacy invasion.
00:15 Overexposure due to Sony restrictions.
00:27 Nightshot On/Off switch.
00:30 Demo nightshot infrared beam.
00:56 3rd mode (halfway between On and Off).
01:18 CCD sensitivity to wider range of frequencies than human eye.
01:33 When trying to find 3rd mode, stop before LED beam activated.
01:45 Benifit of 3rd mode (increased light sensitivity).
02:03 Flame illumination, visible light vs infrared + visible light.
02:23 3 pieces of clothing under different camera settings.
02:30 Hot stove element.
02:54 Scene illuminated only by fire.
03:03 Webcam cheapest way to experiment.
03:22 Websites documenting webcam infrared hack.
03:26 End.
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