For the sake of laser scanning testing equipment with high testing precision and general purpose, it is required that the optical system of the testing equipment operates at wide field of view and wide spectrum with high image quality. For these purposes, based on conventional 7-element optical lens in visible band, a hybrid refractive-diffractive optical system is designed for infrared laser scanning testing equipment by using a hybrid refractive-diffractive singlet instead of doublets. The main parameters of the hybrid lens are 60° field of view, 0.8～1.06 μm action spectrum, 30 mm effective focal length and 30 mm back working distance. The modulation transfer function (MTF) of the hybrid refractive-diffractive lens is near 0.7 at the spatial frequency of 42 lp/mm. The full field of view distortion of the lens is less than 1.9%. The weight decreases by 35.3%. The results show that with the characters of high image quality and miniaturization, the system can meet the general requirements of laser scanning testing equipment.