摘要
为改善传统球面微光夜视系统结构复杂、镜片数较多的特点，将衍射光学元件引入传统球面物镜中，在符合成像质量要求的情况下，设计出一套用于微光夜视仪的折／衍混合物镜光学系统．该物镜视场为40°，相对孔径为1／1．19，包含三个衍射面，并将传统球面系统透镜数减少了2～3片，仅由5片组成，在空间频率为40lp／mm时，轴上传递函数可达0．89，轴外可达0．43．
In order to meet the requirement of image quality, the diffraction optical elements are introduced to the traditional spherical lens, and an optical system with hybrid refractive-diffractive lens is designed to improve the characteristics of complex structure and large number of lenses in the traditional spherical and low-level-light night vision. In this system, the field of view is 40° and the relative aperture is 1/1.19,and the number of traditional spherical lens is decreased by 2 or 3 to 5 including 3 diffractive surfaces. When the spatial frequency is 40 lp/mm, the value of MTF on-axis can reach to 0.89, the value of MTF off-axis 0. 43.
出处
《西安工业大学学报》
CAS
2009年第6期519-523,共5页
Journal of Xi’an Technological University
关键词
微光夜视仪
光学设计
折/衍混合系统
衍射光学元件
low-light level night vision
optical design
hybrid diffractive-refractive optical system
diffractive optical elements
