研究了双组联动长波红外连续变焦光学系统设计，设计了工作波段为 7.7 .m～9.5 .m，焦距为 30 mm～360 mm，F数为 2.24的双组联动连续变焦光学系统，设计结果表明，成像质量好，在 33 1p/mm空间频率处的调制传递函数值均超过 0.15。

We investigated long-wave, infrared, double-linkage, continuous-zoom optical systems and designed a double-linkage continuous-zoom optical system for the 7.7 .m～9.5 .m waveband. The focal length is 30 mm～360 mm and the F number is 2.24. The results demonstrate that the system has high imaging quality, with a modulated transfer function value greater than 0.15 at 33 lines/mm spatial frequency in the image plane.