What is the minimum illumination? What is sensitivity? What does 0.0001Lux stand for?

Answer: The minimum illuminance is a method to measure the camera's sensitivity. In other words, the camera can see the available images under dark conditions. However, because there is no international standard for management, the first large-scale CCD manufacturer has its own method of measuring CCD sensitivity. However, a camera labeled (1Lux, F10) can be exactly the same as a camera labeled (0.01Lux, F10) !!! Strange? why?

Another: The most commonly used method for measuring the lowest illuminance is called the target illuminance method. The target illuminance indicates how strong light reaches the surface of the CCD. Although the clear definitions are different, there are three main parameters that determine the result. It is:

F-stop (used to test the camera lens F-stop)
Color temperature (the color temperature of the light source, that is, the spectral content)
IRE (IRE level of video amplitude)
Reflectivity (target reflectivity and background)

F-stop F-stop is a method to measure the ability of the lens to collect light. A good lens can collect more light and radiate it to the CCD sensor. The F1.4 lens can collect 2 times the light than the F2.0 lens. In other words, the F1.0 lens can collect 100 times more light than the F10 lens, so it is very important to mark F stop in the measurement, otherwise the results are meaningless.

Color temperature Color temperature is a method of expressing the wavelength content of light in a light source. A 3200K light source has most wavelengths between 600 nanometers, and a 9300K light source has most wavelengths between 300 and 500 nanometers, so different color temperatures will completely change the test results . On a typical CCD sensor, one has 600 nanometers.