Kamis, 28 November 2013

How do I prevent my security camera from getting blinded by a red laser?

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Joe


I just purchased a night vision security camera to be used outside and it's weakness is that it gets completely blinded by a red laser. How do I avoid this or modify it so that the laser doesn't affect it?


Answer
Best is to position the camera in such a way that this can be avoided. Red laser blinds the camera not because of the color but because of the intensity in a small area. Even if you use a filter, it won't help much and with the new laser pointers of different colors it can be even more difficult to use a filter.

How to make a night vision light?







I have a security camera, but it does not have night vision. Is there anyway I can make one, or get one under $10, to makw it easier for my security camera at night? (The lights can not be seen by the human eye)


Answer
use ordinary lighting for security at night. it ups the bar for anyone trying to do wrong if clearly visible, so that is as much a deterrent as cameras. ordinary lighting will give more detail and color which are important clues to making an ID. IR is monochrome and blurry and in some cases not admissable as evidence.

the cheap IR illuminators simply use LED's. they provide enough IR to be useful at about 2 meters (6 feet) maximum distance, great for camcorders at parties. totally useless for surveilence. you need the military type IR lamps, about the size of a small refrigerator to cover a parking lot.

not seen by human? get real, all a crook has to do is use a pocket digital camera to find IR illumination sources. doh.




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