激光与中波红外双波段光学系统设计

 根据系统要求，进行激光与中波红外复合制导光学系统设计。该系统红外工作波长为3 μm~5 μm，激光工作波长为1.064 μm，系统接收口径为250 mm，F数为1.4，要求MTF在33 lp/mm时大于0.4，光学透过率大于60%，使用的红外焦平面阵列像元数为640像素×512像素，像元尺寸为15 μm×15 μm。因为系统具有大孔径，小F数的特点，因此选择使用折反射式结构进行二次成像，并进行消热差处理。

Design of laser and mid-wave infrared optical system

According to the system requirement, the laser and mid-wave infrared composite guidance optical system was designed. The infrared working wavelength of the system was 3μm~5μm, the laser wavelength was 1.064 μm, the receiving diameter of the system was 250 mm, F number was 1.4, the value of MTF was greater than 0.4 at 33 lp/mm, the optical transmittance was greater than 60%, the infrared focal plane array was 640×512 pixels, and each pixel was 15 μm×15 μm.The secondary imaging with refractive and reflective structure was used to deal with the athermalization and compact problem.