Just a question.
Having IR night vision cams, I wanted to mount them inside the house (in case they get half-hinched as they've mounted low down). Just wandered how you get around the IR reflection behind glass? The cameras have the IR beam from beside the lens,so it bounces back when near a reflective surface
Is there a way, or do they have to be external ? I know you can mount a separate light source outside to illuminate the area, buy that would mean a whole load of new kit
All replies appreciated
IR light is a light wave so theres no way of stopping the flair from double glazed windows. You could try completely obscuring/deactivating the IR generating LED/s and seeing if the ambient light will suffice, if the cameras are good quality and you have good street lighting outside this may work other than that....No, not really!
Last edited by TSCM.UK.COM; 18-06-2010 at 09:52.
Glass, whether single or double glazed, will block most of the IR, and will reflect a shitload back into the camera / room. (If the glass is the fancy coated, thermally efficient stuff, you're completely buggered!) If you can, mount a cheap IR illuminator, and the camera outside, fairly high up, out of harms way. Not the most elegant of solutions, but the best you're gonna get.
Similarly, mounting a PIR sensor inside the window, looking out over your garden ain't gonna work either !
Exterior IR Flood is way to go, with a cheapish Day/Night Camera. You can get Low Light cameras, Watec 902 series etc. might be worth looking at. Probably a couple of hundred £ with a varifocal, AI lens.
Should work ok on it's own, even better with exterior IR Flood.
The Nite Devil range are excellent low light cameras (without IR) and if you get the lens close enough to the window and have the lights switched off inside that particular room you should still get some decent quality footage of outside.
Have you used any of those Tom? We tested a model about 6 months back (with the on board SD card recording) and were not too impressed, IR floodlight was very weak.
If you've used one and been pleased then might have another look at the product.