Static optical target simulator using films

Optical image sensor is an important part of satellite guidance, navigation, and control (GNC) subsystem, the sensor can get the moon’s image, and the image information can help the moon lander to recognize obstacles, plan paths and select safety areas. In order to realize the function and performance detection of the optical image sensor, a kind of equipment that can afford infinite optical target in the limited space is needed, which can give the moon’s image information to the optical image sensor. A static optical target simulator using films was designed and developed. The simulator used films as the image sources, the films were illuminated by an integrating sphere and the films images were projected to infinity by optical lenses, so as the images at infinity were received by optical image sensor. Results of the designed static optical target simulator show that the field view is more than 30°×30°, the entrance pupil is Φ5 mm, the distance of the entrance pupil is 41 mm, the focal length is 44.78 mm, and the image resolution is more than 1 024×1 024. All the indicators of the static optical target simulator can reach the requirements of the optical image sensor light closed-loop test.