How to choose a night vision device?

I often see the questions about how to choose a suitable night vision device and many people don’t know which specification they should buy. Today I will introduce to you three common parameters.

The most important parameter is the FOM. FOM, calculated as Resolution*SNR, is used to describe the overall performance of night vision devices. The higher the FOM , the clearer and brighter the image. Common values are 1400 1600 1800 and 2000. People can choose suitable specifications according to their needs.

The second is the color of the image. The colors of image are generally divided into white/green phosphor. When people buy night vision devices with FOM 1600 or above, they usually choose white phosphor and when people buy night vision devices with FOM 1400, they choose the green phosphor.

The third is whether the night vision device with auto-gating? Auto-gating is a function that it can automatically adjust the power supply's voltage to ensure the tube is not overloaded under bright light. When people buy night vision devices, I usually recommend they add this function.

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