中国光学（中英文）2025，Vol.18Issue(6)：1327-1343,17.DOI:10.37188/CO.2025-0080
红外双波段制冷型变焦Offner型光谱成像系统设计
Design of an infrared dual-band cooled zoom focal Offner-type spectral imaging optical system
摘要
Abstract
With the breakthrough progress of mid-wave and long-wave infrared hyperspectral imaging tech-nology,the military hyperspectral imaging system,with its unique feature recognition capability and covert reconnaissance advantages,has demonstrated significant strategic value in the field of modern battlefield situational awareness.In this study,a dual-band Offner-type spectral imaging system operating in the mid-wave infrared(3.7-4.8 μm)and long-wave infrared(7.7-9.5 μm)is designed for aerial detection applica-tions based on a 320×240-pixel dual-color cooled infrared detector.The system adopts a hybrid refractive and refractive-reflective optical structure,and realizes a three-field-of-view switching zoom function of 32 mm,200 mm and 800 mm.The optical system adopts the Offner spectroscopic structure,which effectively sup-presses the primary aberration of the system;secondly,through the introduction of the secondary imaging re-lay system,it achieves 100%cold diaphragm matching and significantly reduces the cold reflection effect.Experimental tests show that the system exhibits excellent imaging performance in all bands and at different focal lengths.At a characteristic frequency of 17 lp/mm,the modulation transfer function approaches the dif-fraction limit,and temperature changes have little effect on imaging quality,meeting design specifications for optical image quality.The optical system is characterized by wide spectral response,large magnification ra-tio(25×)and fast field of view switching.The spectral resolution reaches 25 nm,and its imaging quality and spectral resolution meet the technical requirements of aviation photoelectric reconnaissance,which has im-portant application value in military reconnaissance,security monitoring and environmental monitoring.关键词
光学设计/Offner/红外双波段/制冷型/变焦系统Key words
optical system design/Offner/infrared dual-band/cooled/zoom system分类
信息技术与安全科学引用本文复制引用
王翘楚,耿海涛,虞林瑶,张葆..红外双波段制冷型变焦Offner型光谱成像系统设计[J].中国光学（中英文）,2025,18(6):1327-1343,17.基金项目
国家重点研发项目(No.303060302)Supported by National Key Research Program of China(No.303060302) （No.303060302）
