Abstract: An onboard infrared supplementary illumination system is designed through software simulations to solve the problem of low recognition accuracy caused by insufficient ambient illumination and rapid changes in ambient light intensity in an advanced driving assistance image recognition system. IR light-emitting diodes (LEDs) are used as light sources. After collimating the light emitted by the light source with a paraboloid mirror, a compound eye lens is used to realize a rectangular spot with uniformity greater than 90% 25 m away from the light source with radiation energy-use efficiency reaching 98%. The target surface is illuminated using 30 light-source module arrays, and the average irradiance of the target surface is greater than 0.8 W/m². The results show that the assembly tolerance of a single-compound eye lens is looser, and the design method is flexible and suitable for use in other lighting systems.