Design of an athermal zoom optical system for space station applications

An athermal zoom system is designed to meet the light weight requirements of space station health observation applications. In this study, we employ a loss function to steer the material parameters within the front fixed group and to mitigate the focal power contributed by individual lenses. This approach facilitates the optimization of thermal aberrations and manufacturing tolerances. The system maintains a stable image surface in the temperature range of -40^∘C-+60^∘C, and the first lens is made of fused silica, which is resistant to space radiation. The focal length of the zoom system is 12-120 mm, the F number is 3.0-5.0, the working band is 486-656 nm, the total length is 100 mm, the maximum distortion is less than or equal to 2%, and the field of view is 35.6°-3.55°. It is suitable for 1/2.35-in. CMOS. It is small in size and light in weight, good in tolerance, and high in stability, which is more in line with the needs of satellite loads.