Design of mid/long-wave infrared dual-band panoramic optical system

A dual-band and confocal panoramic band optical system for infrared detection is designed to achieve 360° range warning. The working band covers the mid-infrared band (3 ~ 5μm) and the long infrared band (7 ~ 9.5μm), the field of view Angle is (28° ~ 80°) × 360°, and the head unit of the lens is composed of two mirrors and a Ge protection window. The aperture number of the system is 1.3. The symmetrical aspherical surface is introduced into the system to correct the aberration, and the passive athermalisation design is carried out by combining the aspherical surface with the lens material. To achieve good imaging quality in the working environment of -35 ~ 55℃.