How did the hotel camera find it?

When there is no light, turn on the camera of the mobile phone and scan one by one.

1. When staying in a hotel, first turn off all the lights and close the curtains, preferably without lights (the effect is better at night).

2. Turn on the camera of the mobile phone, turn off the flash, walk around the room 360 degrees with the mobile phone, and let the mobile phone shoot every corner.

3. If you find a red dot, it may be a camera.

The reason why the camera can detect the infrared camera is that a silicon detector is installed in the lens of the camera. The function of silicon is imaging and conversion, which converts optical signals into electrical signals and records them on the camera. The wavelength of the light source absorbed by the silicon detector is 400 nm- 1 100 nm, so both mobile phones and cameras can capture infrared rays.

Few mobile phones on the market, such as 5s, are filtered by infrared rays, so they cannot be checked. Unplug the TV when you are resting and sleeping, and some people will put the camera in the TV. And rest at night, turn off the lights and close the curtains.

Extended data:

Where the hotel pinhole camera may exist.

1. switch: If there is a small hole under the switch,

This is a hidden camera hole. Turn it over and look at the back, hiding a whole set of miniature candid camera equipment.

2, hook: This camera is mostly used to sneak shots of women changing clothes, so be sure to observe more.

3, socket: As long as it is a room, there should be more than one socket, which is actually a good place to hide the camera. After all, there is more than one jack on it, which will not attract attention. It can shoot 1080P video with clear pickup, and has the functions of cyclic shooting, photographing, motion detection, audio and video synchronization, remote control switch and so on. Direct plug-in power supply can also ensure video recording at any time.

4、

Screw: Some cameras are so small that you can't imagine them, just like screws.

5, hair dryer: hair dryer is basically a must-have item for hotels, usually hanging on the wall of the bathroom, facing the bathroom. Cameras are usually hidden on the shelf where the hair dryer is placed.

6, charger: found in a rental house or hotel, you must be extra careful, this is probably a camera disguised as a charger. The two USB ports above are just a cover-up, and the black area below is a hidden camera, which is connected to the power supply and takes pictures 24 hours a day.

7. Air-conditioning: Generally, the air-conditioning installation position is relatively high, and the camera may be hidden in the casing, and if the air-conditioning power supply is connected, the power will not be cut off for 24 hours.

8. Smoke detector: As a standard equipment for fire safety, every room in the hotel should have a smoke detector. The hole on it is rarely noticed, but it may actually be a sneak shot hole.

9. Router: If you don't point it out, you may never find the camera.

See that row of lights on the side? The kind with no indication label on the outermost. This is a camera installed by temporary drilling.