摘要
由于双折射滤光器型太阳磁场望远镜中滤光器的研制质量直接影响透过带,进而影响太阳磁场的测量,本文对影响双折射滤光器透过带漂移的各种误差因素进行了分析。通过计算机编程,完全模拟了光线轨迹,精确分析了多种误差项对双折射滤光器透过带的影响。给出了引起透过带漂移、展宽、极大值和极小值变化的主要误差项。分析表明,入射角、晶体光轴倾角误差、晶体厚度误差和1/4波片光轴方位角误差影响透过带漂移;只有晶体光轴方位角误差影响透过带宽,当误差为2°时,透过带展宽了0.078%;宽视场1/2波片光轴方位角误差对极大值的影响最明显,当误差为2°时,极大值减小了0.487%;晶体光轴方位角误差、宽视场1/2波片延迟误差和1/4波片光轴方位角误差对极小值都有不同程度的影响。
As the quality of filter in a solar magnetic field telescope with a birefringent filter directly affects the transmission band and the measurement of solar magnetic field,this paper researches the error factors that causes the shift of transmission band.By using computer program,the ray trace is simulated completely,and the variation of transmission band with different errors is obtained accurately.Analysis results provide the primary error terms that cause the band shift,band broadening,and the changes of maximum and minimum.Among these errors,the incident angle,optical axis tilt error of crystal,thickness error of crystal,and the optical axis azimuth error of quarter-wave plate affect the band shift.Moreover,the optical axis azimuth error of crystal affects the band broadening,and the transmission band will be broadened by 0.078% when the error is 2°.The optical axis azimuth error of a half-wave plate in a the wide field effects evidently on the maximum,and the maximum decrease by 0.487% when the error is 2°.Furthermore,the optical axis azimuth error of crystal,retardance error of half-wave plate in the wide field,and the optical axis azimuth error of quarter-wave plate have different effects on the minimum.
出处
《光学精密工程》
EI
CAS
CSCD
北大核心
2010年第1期52-59,共8页
Optics and Precision Engineering
基金
天文联合基金资助项目(No.10778723
No.10878016)
国家自然科学基金(青年基金)资助项目(No.10803012)
