含高次塑料非球面的头盔微光夜视物镜设计  

Design of Object Lens for Helmet-Mounted Night Vision Goggles with High-Order Plastic Aspherical Surfaces

作　　者：杨胜杰[1] 

机构地区：[1]中航工业洛阳电光设备研究所,河南洛阳471009

出　　处：《电光与控制》2009年第1期80-83,96,共5页Electronics Optics & Control

摘　　要：为使头盔微光夜视镜的重量更轻,同时保证其较好的成像性能,分析了光学塑料的特性及其加工,通过引入高次塑料非球面,设计了含有3个高次塑料非球面的6片式微光夜视物镜。该物镜具有大视场(40°)、小F数(F/1.25)、小畸变(1%)的特点,光学传递函数在空间频率40 lp/mm时,轴上传函≥0.6,轴外传函≥0.4,满足微光夜视物镜成像要求。相对具有同样性能的传统物镜系统,总长41 mm,为传统物镜的82.6%,重量13.3 g,仅为传统物镜的32.7%。为头盔式微光夜视系统减重设计提供了一个新的参考思路。To guarantee good imaging performance of helmet-mounted night vision goggles while keeping light weight, the characteristics and machining of optical plastic are described. By introducing high-order aspheric surfaces on plastic elements, a six-element object lens containing three high-order plastic aspheric surfaces was designed for a night vision goggles. The object lens has a large field of view（2ω =40°） , small F number （F/1.25）, small distortion（≤1%）. At the spatial frequency of 40 lp/mm, the on-axis Optical Transfer Function（OTF） of the object lens is not less than 0.6 and the off-axis OTF is not less than 0.4, which can fulfill the requirements of a high performance low-light-level imaging system. Compared with a traditional objective system with equivalent performance, the total track of the object lens with high-order plastic aspheric surfaces is 41 rnm, 82. 6% of the traditional objective; and the weight is 13.3 g, only 32. 7% of the traditional objective. It supplies a new method for weight-decreasing design of the of night vision goggles.

关 键 词：头盔微光夜视 光学设计 光学塑料 非球面 物镜 

分 类 号：V243[航空宇航科学与技术—飞行器设计]