The dynamic range of the camera indicates the range of the camera detecting optical signal. The dynamic range can be defined by two methods. One is the optical dynamic range, which refers to the ratio of the maximum light intensity at saturation to the light intensity equivalent to the noise output, which is determined by the characteristics of the chip.The other is the electronic dynamic range, which refers to the ratio between saturation voltage and noise voltage.For a fixed camera, its dynamic range is a constant value and does not change with the change of external conditions.In response to the linear response, the camera's dynamic range is defined as the ratio of saturated exposure to noise equivalent exposure: dynamic range = full well capacity of the photosensitive element/equivalent noise signal dynamic range can be expressed by multiples, dB or Bit.With a large dynamic range, the camera has stronger adaptability to different light intensities.