头盔式单目微光夜视仪中光学系统的设计

Lens design in helmet-mounted LLL night-vision system

为提高头盔式单目微光夜视仪中光学系统的成像质量,并满足夜视仪结构紧凑、质量小的指标要求,提出在微光夜视仪光学系统设计中引入高次项非球面透镜的设计方法。针对具体的头盔式微光夜视仪,根据微光物镜、目镜系统技术参数计算理论,确定该微光夜视仪光学系统的技术参数,应用光学设计软件ZEMX上机调试,并在光学系统设计中引入高次非球面透镜,使物镜系统镜片数由原来的9片减少为6片,目镜系统由原来的9片减少为7片,简化了结构,并提高了成像质量。设计结果表明:在头盔式微光夜视系统中采用非球面透镜可以提高系统成像质量,简化系统结构。

To improve the imaging quality of the lens used in helmet-mounted low-level-light （LLL） night vision system and make the lens light in weight, small in size, compact in structure, a high order aspheric lens is designed. According to the theoretical calculation of the lens parameters specific to the helmet-mounted LLL night-vision system, lens parameters are designed to meet the demand. With the high order aspheric lens designed, the number of lenses in object lens is reduced from 9 to 6 and the number of lenses in ocular is reduced from 9 to 7. The analysis results show that the configuration of the aspheric surface for helmet-mounted LLL night-vision systems can make its lens configuration simple.