How many meters can thermal imaging surveillance see at night?

Surveillance cameras can illuminate meters, etc., and there will be some gaps in the visual distance between day and night, and it may be broken a little at night.

The camera generally has 3 6mm, 6mm, 8mm, 12mm, 16mm, the angle is inversely proportional to the distance, the larger the angle, the closer the distance.

3 6 mm lens is 67 4 degrees at a distance of 15 meters, 6 mm lens is 42 3 degrees at a distance of 20 meters;

The 8mm lens is 32 6 degrees and the distance is 25 meters, and the 12mm lens is 22 1 degrees and the distance is 40 meters;

The 16 mm lens is 17 1 degrees, and the distance is 60 meters.

Extended information: 1. Camera resolution division.

1) A low-grade type with an image pixel of about 250,000 pixels, a color resolution of 330 lines, and a black and white resolution of about 400 lines.

2) Mid-range type with 250,000 to 380,000 pixels, 420 lines of color resolution, and 500 lines of black and white resolution.

3) The image is more than 380,000 points, the color resolution is greater than or equal to 480 lines, the black and white resolution, and the high resolution is more than 600 lines.

Second, the sensitivity of the camera division.

Thermal imaging surveillance, at night can see about thirty or forty meters, but it depends on you, depending on the brand you buy, each brand is different from theirs. But visibility is not the same.

This monitor can generally see between 50 and 100 meters at night.

I don't believe the specific situation, one is about 20 meters.

This is about 50-100 meters away, it should be like this, you can try it.

Thermal imaging monitoring at night can see at a great distance to see what model you have.

The range that thermal imaging monitoring can see at night is about 30 meters, and the closer you are, the clearer you can see.

With the complexity of monitoring scenarios, the market has put forward higher requirements for monitoring in harsh environments such as dark night, rain and snow, and haze. Traditional visible light cameras are very dependent on light imaging, which has certain limitations in dealing with the above extreme environments, while infrared thermal imaging cameras, because of the natural advantages of all-weather, strong detection ability and long detection distance, are widely used in security monitoring scenarios.

So how far can the infrared thermal imaging camera detect? There are actually several parameters that work together to determine this:

1. Lens focal length: The lens focal length directly determines the size of the image formed by the target, which is usually represented by the letter F.

2. Spatial resolution: It represents the angle of each pixel in the object space, that is, the minimum angle of the detected object that the system can resolve, which is generally calculated by the ratio of the pixel size (D) to the focal length (F), that is, IFOV D F. And the distance of the detected target = the measured target ifov, so the smaller the ifov, the farther it can be measured.

3. Detector performance: Although the focal length of the lens determines the detection distance of the infrared camera from the theoretical panicle, the performance of the detector is also very important in practical applications, which determines the quality and clarity of the imaging, and the detector performance can be analyzed from the aspects of pixel size, thermal sensitivity, signal processing, etc.

In short, how far the monitoring distance of thermal imaging can be seen should be combined with the above aspects.