How to use Apple 6 to check whether there is a camera in the room?

This requires the camera to turn on infrared light to be detected. If it is not turned on, it will not be detected. According to the method recommended by professionals, we can detect:

One is to detect the leakage frequency of the camera circuit and the radio frequency of transmitting wireless signals, which belongs to the radio detection method.

The second is to use the particularity of fisheye lens to reflect the light to the wall, and use optical equipment to receive and display its reflection. The reflection of the fisheye lens must be different from that of the wall, so it can be marked.

1, the spectrum that the camera can identify is higher than that of the human eye, and the camera can also capture near-infrared light that the human eye can't see, even a very cheap white camera has this ability. There is a kind of bootlegging equipment, which is equipped with an infrared fill light around the camera, which emits near-infrared light invisible to human eyes, shines on the recorded object like a flashlight, and can be imaged on CCD, but it is a dark red monochrome image, which is not clear.

2. The more advanced infrared compensator is the laser device, which emits near-infrared light, but with higher power and clearer imaging. The top layer is a special CCD, which is very sensitive to near infrared light. It can capture infrared light emitted by human body without supplementary light, which is similar to night vision device, so it is also called night vision CCD. But this kind of equipment is very expensive, and hotel owners can't afford it.

The camera function of mobile phone is the same as that of camera, and its CCD can also capture infrared rays. Turn on the camera function of the mobile phone, press the TV remote control against the camera in the dark, and you can see the erythema on the screen. The principle of the method introduced in the report comes from this.