Design of a Catadioptric System for Infrared Star Sensor with Wide Field of View

star sensors are high-precision space attitude measurement devices that use stars as detection objects, widely used in essential high-precision attitude sensitive components such as satellites, space shuttles, missiles, etc.To achieve precise applications under specific environmental requirements, an infrared optical system that can be applied to near-infrared wavelengths was designed. First of all, based on the selected parameters, the initial structure was selected and the form of the Maxutov telescope was selected and improved.Then, the detection performance of the design results was analyzed.Due to the large range of high and low temperature changes in the outer space environment, the system lens barrel material analysis was carried out to obtain the influence of temperature changes on the energy distribution of the optical system.Finally, a tolerance analysis and optimization of the designed system were conducted so that it could meet the needs of processing and assembly.The design and analysis results indicate that the optical system adopts a spherical catadioptric mirror surface, the total length of the system is 171.2mm, the full field of view for a surrounding energy distribution is > 86%, the maximum magnification chromatic aberration value of monochromatic light is

This article takes the improved Marksutov telescope as the initial structure and designs a light source with wavelengths ranging from 0.8 to 0.9 μ m. A global compact reflective optical system with a focal length of 212mm, a full field of view of 2.5 °, and an F-number of 1.18, with a total axial length of 171.2mm. The detection performance analysis results of the system indicate that the energy distribution in the full field of view within the spectral range of the system is higher than 86%, and the color deviation relative to the central wavelength of monochromatic light is ≤ 0.5 μ m. Absolute distortion in full field of view