| With the rapid development of China’s technology and the improvement of people’s living conditions,the private cars have begun to universal.Although the car installed with the rearview mirror,the car still exist large blind spots.Because of the case of blind spots and resolution,the problem such as cut rub is increasing by year.It asked to design a wide field angle of the car rear view system to solve the above mentioned problems.According to above questions,this paper design a short focus and ultra-wide field of view lens used for backing system.This paper design a short focus and ultra-wide field of view lens used for backing system is discussed.The optical design uses fish-eye lens optical structure.The ZEMAX software is used to optimize the system..This design have a structure of 6 pieces that all are spherical surface.The field angle is 179° and use 1/3 CCD imaging device.The system’s length is 17.5mm.The aberration curves and MTF curves are shown and full field angle MTF value reached 0.5 at 125lp/mm and MTF value reached 0.2 at 250lp/mm.This system has a compact structure and excellent image quality. |
