【摘要】 为满足智能家居设备对近红外飞行时间镜头视场角差异化的需求，基于特殊曲面，使用CodeV光学设计软件设计了一款近红外广角镜头。该镜头由4片塑胶镜片和1片红外带通滤光片构成，其中，4片塑胶镜片采用负-正-正-正透镜结构，镜片为变形非球面与自由曲面的结合。仿真结果显示，该镜头的F数为3.5，全视场最大角度为127°，水平和垂直角度之比为1.8:1，系统总长为11.9 mm，在空间频率为83 lp/mm时调制传递函数（MTF）大于40%，可以很好地完成近红外识别探测任务。更多还原

【Abstract】 To meet the demand for differentiated field of view of near-infrared time of flight lenses in smart home devices, this paper designs a near-infrared wide-angle lens based on a special surface using CodeV optical design software. The lens consists of four plastic lenses and one infrared bandpass filter. The four plastic lenses adopt a negative-positive-positive-positive lens structure, and the lens type is a combination of deformable non spherical and free curved surfaces. The design simulation results show that the F-number of the lens is 3.5, the maximum angle of the full field of view is 127°, the ratio of horizontal and vertical angles is 1.8:1, the total length of the system is 11.9 mm, and the modulation transfer function(MTF) is greater than 40% when the spatial frequency is 83 lp/mm, which can complete the function of near-infrared recognition and detection tasks very well.更多还原