Speed measurement lens

With the development of subway technology, more and more stringent requirements are put forward for the safety of subway passenger cars, especially the measurement of subgrade unevenness is particularly important. The measurement principle is to use the basic principle of laser dynamic scanning to measure the shape and unevenness of subway subgrade in real time. The optical lens is a key measuring component in the subway laser dynamic scanner. The lens has the advantages of high precision, light weight and large field of view.