UAV-borne Biomimetic Curved Compound-eye Imaging System for Velocity Measurement

Based on the visual advantages of the biomimetic compound eye, the biomimetic curved compound-eye is applied to the unmanned aerial vehicle-borne photoelectric detection system to realize the airborne wide field-of-view and high-resolution detection of moving objects purposes. According to the characteristics of the biological compound eye, a lens array arranged on the curved surface in a hexagon is designed as compound-eye lens, combined with an optical relay subsystem and a CMOS image sensor to form a biomimetic curved compound-eye imaging and velocity measurement system. The developed biomimetic curved compound-eye imaging system has a field of view of 98 degrees / 98 degrees, a system focal length of 5 mm, an angular resolution of 1.8 mrad and an F-number of 3.5. The size of the system is Phi 123 mm X 195 mm, and the weight is 1.35 kg. According to the imaging principle of the biomimetic compound-eye and by taking advantage of the overlapping field of views between adjacent ommatidia, the velocity measurement principle of the biomimetic curved compound-eye is proposed. The velocity measurement experiment of a moving car shows that the velocity measurement method can effectively improve the test reliability and accuracy of the moving target.