红外技术2025，Vol.47Issue(5)：553-562,10.
紧凑式长波红外变焦光学系统设计
Design of Compact Long-Wave Infrared Zoom Optical System
摘要
Abstract
To meet the demand for compactness in long-wave infrared zoom optical systems,a linear dual-group linkage continuous zoom structure was utilized to simplify the system design.A compact long-wave infrared zoom optical system was developed using an uncooled infrared detector with a 384×288 array and a 25 μm pixel size,incorporating four single-crystal silicon(Si)lenses.The system has a total length of 160 mm,operates in the 8-12 μm wavelength band,offers a zoom range of 100-200 mm,a field of view from 3.42° to 6.80°,and maintains a constant F-number of 1.4.The design incorporates a diffractive optical element to achieve athermalization and eliminate secondary spectrum aberrations.Additionally,a conical surface and an even-order aspherical surface are introduced to balance spherical and chromatic aberrations caused by the long focal length and large aperture.The design results indicate that the system is compact and can achieve high-quality infrared thermal imaging within a temperature range of-40℃ to 60℃.The modulation transfer function(MTF)across the entire field of view exceeds 0.3 at the Nyquist frequency of 20 lp/mm.The zoom cam curve is smooth and free of inflection points,and the tolerance analysis confirms good manufacturability.关键词
光学设计/长波红外/变焦镜头/线性双组联动连续变焦/紧凑式设计Key words
optical design/long wave infrared/zoom lens/linear double linkage continuous zoom/compact design引用本文复制引用
曹天皓,张继艳,林正煜,孙丽婷,秦腾,申洋羽..紧凑式长波红外变焦光学系统设计[J].红外技术,2025,47(5):553-562,10.基金项目
福建省自然科学基金(2022J011272) （2022J011272）
厦门市科技计划项目(项目编号2023CXY0402). （项目编号2023CXY0402）
