六边形环带排布的共光路复眼光学系统设计  

Design of compound eye optical system with hexagonal band arrangement and common optical path

作　　者：范晨 刘钧[1] 高明[1] 吕宏[1] FAN Chen;LIU Jun;GAO Ming;LV Hong(School of Optoelectronic Engineering,Xi’an Technological University,Xi’an 710021,China)

机构地区：[1]西安工业大学光电工程学院,陕西西安710021

出　　处：《中国光学（中英文）》2023年第1期158-173,共16页Chinese Optics

基　　金：陕西省自然科学基础研究计划项目(No.2019JM-470);陕西省教育厅科研计划项目(No.18JS048)。

摘　　要：为解决仿生复眼系统目前普遍存在的空间利用率较低、子眼孔径较小问题,本文提出一种六边形环带排布的大孔径复眼系统设计方法,通过引入填充因子理论,以传统曲面圆周式排布为对照组,论证了六边形环带排布模型可有效提高大孔径复眼系统的空间利用率。针对单波段复眼系统获取目标信息量有限的问题,设计采用红外双波段共光路的成像结构形式,辅以红外双色探测器接收,增强了复眼系统获取目标信息的多维度能力,同时建立了六边形环带排布方式的子孔径定位数学模型。仿生复眼系统共由91个子孔径组成,子孔径入瞳为16 mm,焦距为48 mm,视场角为9°,子孔径合成总视场为96°×85°,中继转像系统焦距为6.14 mm,子眼系统和中继转像系统在-40℃~+60℃温度变化范围内无热差影响,探测器冷反射效应可忽略。对复眼系统进行组合,仿真结果表明:各个光学子通道均方根(RMS)半径均小于艾里斑,光学畸变值均小于0.1%,边缘子通道红外中波/长波波段调制传递函数(MTF)在17 lp/mm处均达到0.5以上。该系统结构紧凑、探测能力强,可用于复杂环境中多目标的探测与识别。In order to solve the challenges of low space utilization and small aperture size for the sub-eye in bionic compound eye systems,a design method for a large aperture compound eye system with a hexagonal band arrangement is proposed in this paper.Using the filling factor theory,taking the traditional curved surface circular arrangement as the control group,it is demonstrated that the hexagonal band arrangement model can effectively improve the space utilization of a large-aperture compound eye system.Aiming at the limited target information acquisition of a single-band compound eye system,an infrared dual-band common optical path imaging form was designed,supplemented by a two-color image sensor,which enhanced the multidimensional ability of the compound eye system to obtain information.At the same time,a mathematical model of the sub-aperture positioning of the hexagonal band arrangement is established.The bionic compound eye system is composed of 91 sub-apertures with an entrance pupil diameter of 16 mm,a focal length of 48 mm and a field of view of 9°.The combined total field of view of the sub-apertures is 96°×85°.The focal length of the relay system is 6.14 mm.In a temperature range of-40°C~+60°C,the sub-aperture and the relay systems basically have no influence from thermal differences.The cold reflection effect of the detector can be ignored.The simulation results show that the Root Mean Square(RMS)radius of each sub-channel is smaller than the airy spot and the optical distortion value of each sub-channel is less than 0.1%.The Modulation Transfer Function(MTF)of the edge sub-channel in the MWIR/LWIR band is above 0.5 at 17 lp/mm.The system has a compact structure and strong detection ability,and can be used for multi-target detection and recognition in complex environments.

关 键 词：仿生复眼系统 填充因子 六边形环带排布 红外双波段共光路 子孔径定位模型 

分 类 号：O439[机械工程—光学工程]