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空间太阳望远镜中的双折射干涉滤光器对于温度的变化十分敏感,传统的滤光器在空间环境中很难做到高精度的温度控制。改进传统滤光器的结构,在每一单级中加入LCVR(液晶位相延迟器),通过LCVR主动引入的附加位相延迟补偿由于温度波动引起的晶体位相延迟,可使滤光器透过率峰值波长始终保持稳定。以Lyot滤光器为研究对象,通过理论计算和模拟分析证明了该方法的可行性。该方法应用到空间双折射干涉滤光器可以使滤光器在卫星制造部门提供的环境温度下不使用任何温控系统依然正常使用,成功解决了空间双折射干涉滤光器温控精度的问题。由于摒弃了传统的两级温控装置,有效减小了滤光器的体积,减轻了滤光器的质量,使其更符合空间有效载荷的使用要求。
Birefringent interference filters in space solar telescopes are very sensitive to changes in temperature. Traditional filters are difficult to control with high precision in a space environment. Improve the traditional filter structure, LCVR (liquid crystal phase retarder) is added in each single stage, and the additional phase delay introduced by the LCVR compensates for the crystal phase retardation caused by the temperature fluctuation, so that the filter transmittance peak The wavelength is always stable. Taking Lyot filter as the research object, the feasibility of this method is proved by theoretical calculation and simulation analysis. The application of the method to the spatial birefringent interference filter can make the filter still work normally without using any temperature control system at the ambient temperature provided by the satellite manufacturing department and successfully solve the problem of the temperature control precision of the space birefringence interference filter . Due to the abandonment of the traditional two-stage temperature control device, the size of the filter is effectively reduced, the quality of the filter is reduced, and the utility model more meets the requirements of space payload.