Wide-dynamic-range device for measuring extinction ratio of star sensor light hood

The invention relates to a wide-dynamic-range device for measuring the extinction ratio of a star sensor light hood, relating to a technology for measuring the extinction ratio of the star sensor light hood, and used for solving the problems of being low in measurement precision and measurement speed in the existing method for measuring the extinction ratio of the light hood. A radiation emitting and shaping sub-system provided by the invention is used for providing a light source for measurement of the extinction ratio; a radiation data acquiring and processing sub-system comprises an integral sphere and a computer; the integral sphere is used for measuring energy at the inlet and the outlet of the light hood and sending a measurement result to the computer; a mechanical motion and control sub-system is used for bearing and driving the light hood, a light hood support structure and the integral sphere to rotate together; and an environmental parasitic light absorbing and inhibiting sub-system is a darkroom and used for absorbing background parasitic light. According to the invention, measurement with the illumination of 10 to 3-1051x can be realized; the integral sphere is used as the receiving device, so that the measurement error is less than 2%; automatic measurement is realized through software integration; the measurement speed is increased; and thus, the wide-dynamic-range device disclosed by the invention is applied to measuring the extinction ratio of the star sensor light hood.