Stray light severely affecting the performance of the spatial optical systems,the baffle as a kind of major measure that can effectively suppress stray light.Optimizing the internal structure of the baffle and choosing the appropriate material for the baffle are of great significance for improving the performance of the space optical systems.This paper proposes a structure design scheme of novel baffle based on the horn tube effect.This paper establishes a mathematical model for the structure of the horn tube, and uses MATLAB software to carry out the programming simulation to analyze the influence of different structural parameters on the number of reflections of the inner wall of the horn tube under different off-axis angles of the light source.The horn tube was applied as the structure of stray light suppression to a cylindrical baffle, and a three-dimensional model was built by using Solidworks software and imported into TracePro software to analyze the capability of suppressing stray light.Comparing the vertical vane with the horn tube , the results show that the horn tube as the vane has the better effect to suppress stray light,increased efficiency by nearly 50%.
In order to meet the requirements of high-precision alignment of primary and secondary mirrors of space camera in
thermal environment, we develop a new supporting structure which can eliminate heat affect between mirrors
automatically. Through the simulation analysis, we have verified this structural design is feasible. According to
requirements of the optical system, an integrated machining scheme with three-bar supporting structure for the secondary
mirror is proposed. The automatic athermalization of the primary and secondary mirrors supporting structure is
confirmed by structural analysis and optimization. The displacement between the primary mirror and secondary mirrors
in the thermal environment range of -20° ~ +60°C is analyzed by using the PATRAN software, and the results show the
position change is within 0.01mm. The structural size of the secondary mirror supporting cylinder is optimized, and the
effect of stray light suppression for the multilayer sleeve visor is analyzed and verified by using the TRACEPRO
software. The results show that the proposed structural design can achieve the high stability of the primary and
secondary mirrors supporting structure and the good effect of stray light suppression.
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