In the case of thermal you can use several methods.
Ir light blind cameras.
Infrared light indeed affects a camera s ability to record normal things correctly.
Infrared light against surveillance cameras is an easy to build device that protects you from cameras in public spaces.
And it can be pretty easy for you to tell.
Also the effectiveness of this method is a bit hard to gauge.
The focus is to amplify the interaction between machines or light sources that have been built as surveillance devices.
The camera in the iphone is blind to ir leds as is my nikon d90.
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For example most infrared security cameras will have visible red light at night.
Is there any way this type of interference can be done with night vision or infrared cameras and if so how.
You can observe whether there is red light or wires connected to the cameras.
In this case you don t need to go through the trouble to blind cctv security cameras.
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Do not point the laser into your eye.
This type of project always seems to re emerge every few years.
What is this in this video i explore a weakness in security cameras specifically the night vision variety that renders a person incognito in its view.
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The camera can see you until you get the laser aimed correctly.
It really depends on what you mean by block.
Infrared light is present all around us.
However the majority of manufacturers employ ir blocking filters over digital camera sensors to stop the infrared light.
I ve heard that if a cctv camera that operates on a photoelectric sensor is exposed to infrared leds it will be overwhelmed and will present the image as an opaque white light.
No light samsung galaxy s4 dim purplish light.
So going through every digital camera i could find all using the same verizon fios remote motorola droid x2 bright white light canon a1000 consumer camera bright white light iphone 5 no light ipod touch 5th gen.
Although we can t see these lights on our own cameras can.
Anything that comes between the laser and the camera will instantly un blind the camera.
I don t think you re asking how to make something unseen by such a camera but you re asking how to stop the camera seeing anything.