Important parameters of night vision devices
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Important parameters of night vision devices！！！
Image tube grade
The current tube grades are mainly Gen2 and Gen3.
Resolution is a parameter standard for judging the quality of night vision devices of the same level. Comparing under the premise of the same level (generation 2+ or generation 3), the higher the parameter, the higher the resolution of the night vision device, and the parameter unit is lp/mm.
SNR：signal-to-noise
The image intensifier tube and the internal light path of the night vision device are jointly determined. The higher the signal-to-noise ratio, the better the night vision device's ability to resist external interference, the smaller the internal light path interference, and the clearer the image.
Sensitivity
The sensitivity reflects the night vision capability of the night vision device.The higher the sensitivity, the stronger the brightness of the night vision device, so the brightness and contrast of the image will be higher in low light.
FOM
Evaluate the overall performance of night vision devices.
Magnification
To show the relationship between the actual size of an object and its enlarged size.General magnifications include 1X, 3X, 5X, 6X, 8X, etc.
FOV（Field of View ）
The size of the field of view determines the field of view of the optical instrument.The larger the field of view and the smaller the optical magnification.
Diopter Adjustment
Diopter adjustment solves differences in eye vision.
Focus Range
Night vision devices are usually 1x, with a focusing range from 0.25 meters to infinity.
Environmental Rating
Such as IP65, IP67, IP68, etc. The first number 6 refers to the dustproof level, and the second number 5 refers to the waterproof level.
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