method 1
1 Use a very bright LED flashlight to shine directly on the camera. The brighter the flashlight, the better. You can choose a small portable flashlight. This method is only suitable for dark environments, so it can only be used when sneaking around at night or in a closed environment. X Research Source     signal jammer
2 Cover your face with lights. Position your camera and point the light directly at it. As long as you do it correctly, the lens will reflect, making it almost impossible to capture your appearance. X Research Source But be aware that the flashlight method is anything but subtle. A sudden bright light will let alert security guards know someone is coming. But this way you can at least use bright light to prevent the camera from capturing your face clearly.
3. Hold the flashlight steadily. Be careful not to let the light deviate from the camera, otherwise it will reveal your appearance. Be sure not to let the light shine on your face. Remember, this method requires quick and precise movements.
4. Install infrared LED lights on clothes. Another quick fix is to superglue a string of high-brightness light bulbs to a hat or bandana. If you want to make the effect even better, you can create an LED "mask" that will make your face look blurry. The light should be bright enough that the camera cannot capture your face clearly, but it should not block your view!

Method 2
1 Point the infrared laser directly at the camera. This method is more subtle than using a flashlight, but the action is more precise. If the laser deviates from the camera even for a moment, your face will be captured. Act quickly and efficiently to avoid detection. X Research Source This method works day or night. But the effect may be better at night. X Research Source You can use any standard laser pointer. Generally speaking, the stronger the laser, the better the results.
2 Be aware of the shortcomings of this approach. You'll be photographed until you point the laser at the camera. If any obstruction appears between the laser and the camera, the camera will immediately resume functionality. Furthermore, it is difficult to judge the effectiveness of this approach. There's no way of knowing exactly from your perspective whether the laser is pointed at the camera. Do not point the laser pointer at your own eyes. Otherwise you might blind yourself! X Relief Source US Occupational Safety and Health Administration can wear sunglasses to protect vision, but this does not ensure safety.