CAJ | 학술논문

针对长焦距小型化电视的设计要求，采用摄远型光学结构压缩系统的轴向尺寸，使摄远比达到了0．53，并对系统进行了消杂光及光机无热化设计，通过合理地设置光阑减少系统的杂散光，选择合适的结构材料与光学材料相匹配，在整个工作温度范围（-40℃～＋65℃），像面漂移量在焦深范围内，20lp/mm时系统的MTF在0．7以上，点列斑4．7μm，小于探测器的像元尺寸6μm ，光轴稳定性达到了0．04 m rad ，系统无需调焦便可满足高低温等恶劣环境下的像质和光轴稳定性要求。试验结果表明：探测和识别特定目标距离均达到了指标要求。
침대장초거소형화전시적설계요구，채용섭원형광학결구압축계통적축향척촌，사섭원비체도료0．53，병대계통진행료소잡광급광궤무열화설계，통과합리지설치광란감소계통적잡산광，선택합괄적결구재료여광학재료상필배，재정개공작온도범위（-40℃～＋65℃），상면표이량재초심범위내，20lp/mm시계통적MTF재0．7이상，점렬반4．7μm，소우탐측기적상원척촌6μm ，광축은정성체도료0．04 m rad ，계통무수조초편가만족고저온등악렬배경하적상질화광축은정성요구。시험결과표명：탐측화식별특정목표거리균체도료지표요구。
In order to achieve the target of long-focal length miniaturized near-infrared (NIR) system ,the telephoto optical structure was adopted to compress the axial dimension ,and the telephoto ratio reached 0 .53 .Furthermore ,the stray light was eliminated by properly setting the stop ,and by choosing appropriate mechanical and optical materials ,the athermal design was realized .In working temperature(-40 ℃ ~ +65 ℃) ,the image surface drift is smaller than focal depth ,the modulation transfer function(MTF) ≥0 .7 at 20 lp/mm ,the spot is 4 .7 μm which is smaller than CCD pixel of 6 μm ,and the optical axis stability is 0 .04 mrad .The sys-tem can gain good imaging quality and optical axis stability in worsened environment without focusing .Test result shows both the detection and recognition distances meet the requirements .