星模拟器光学系统视场拼接方法的研究

A field-of-view splicing method for the optical system of a star simulator

大视场星模拟器可以提供更广的星图范围。但是现有星模拟器受显示芯片尺寸的限制,最大视场不超过30°。为了增大星模拟器光学系统视场,本文提出一种将同一规格的星模拟器视场进行拼接从而扩大视场的方法。为了降低成本及系统复杂程度、减少系统整体重量,以最少的拼接数目实现最大的拼接视场,文中针对视场重叠区域进行了详细计算与分析,提出以平面拼接为基础的形式简化拼接模型,得到正三角形、正四边形、正六边形3种典型的拼接方式,并推导了3种拼接方式下视场利用率的计算方法。提出了单一视场坐标计算方法,据此确定每个视场的中心位置,得到准确拼接数目。对比结果显示,正六边形拼接方式具有视场利用率更高、拼接数目更少的突出优势,为大视场星模拟器设计提供依据。

The large field-of-view(FOV)star simulator provides wider star maps but the existing star simu-lator is limited by the size of the display chip,and the maximum FOV is not more than 30°.In order to in-crease the FOV of the star simulator,a splicing method is proposed.In order to reduce the cost,the overall weight and complexity of the system,and to achieve the largest splice FOV with the least amount of splicing,we carry out detailed calculation and analysis of the overlapping area of the field of view and propose a sim-plified splicing model based on plane splicing.Three typical splicing methods are produced including a regu-lar triangle,a regular quadrilateral and a regular hexagon,and the calculation of the FOV utilization is de-duced.This paper also provides a coordinate calculation method,determining the center position of each FOV and obtaining an accurate number of the stitching.The final comparison result shows that the regular hexagon splicing method has the outstanding advantages of a higher utilization of the FOV and fewer spli-cing numbers,which provides a basis for the design of a large FOV star simulator.