【摘要】 面向有毒有害气体探测需求，提出采用双色宽波段高灵敏度红外气体探测方法，并针对宽波段变焦色差校正难题，提出一种基于复消色差和机械正组补偿理论的宽波段红外变焦光学系统设计方法，设计了一种宽波段非制冷红外变焦光学系统。系统焦距25～75 mm，工作波长3～12μm,F数为1.8，适配640×512分辨率的非制冷双色红外焦平面探测器，像素大小17μm，变焦过程中系统总长保持160 mm不变。设计结果表明，系统在全焦段各视场调制传递函数在30 lp/mm处均接近衍射极限，成像质量良好，满足设计要求。系统具有结构紧凑、波段范围宽等优点。更多还原

【Abstract】 A two-color wide-band and high-sensitivity infrared gas detection method was proposed for the detection of toxic and harmful gases. Aiming at the difficulty of wide-band zoom color correction,a design method of wide-band infrared zoom optical system based on achromatic and mechanical positive group compensation theory was proposed,and a wide-band unrefrigerated infrared zoom optical system was designed. The focal length of the system is 25～75 mm,the working wavelength is 3～12 μm,and the F number is 1.8. It is suitable for the uncooled dual-color infrared focal plane detector with 640×512 resolution,the pixel size is 17 μm,and the total length of the system remains unchanged at 160 mm during the zoom process. The design results show that the MTF of the optical system is close to the diffraction limit at30 lp/mm,and the imaging quality is good,which meets the design and application requirements. The system has the advantages of compact structure and wide band range.更多还原