双折射材料的温度修正 Birefringent Material Temperature Modification &=*sN`
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目前,FRED尚不支持“global”温度设置,温度敏感性评估一般用脚本编程来完成,该文档演示双折射材料的折射率随温度变化的问题。附件案例文件包括两个双折射材料模,“KDP”和 “KDP Baseline”, KDP Baseline材料存储在已知温度下的折射率,KDP材料用于储存在“current”温度下的折射率值,定义为与baseline material之间的温度差。一个嵌入的脚本名为“modifyBirefringentMaterialIndex” ,包含在FRED文件中,另外也单独附加。其实现过程如下: ' !2NSv
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1.Retrieve the node numbers for the two materials, KDP and KDP Baseline Tnv,$KOhs
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2.User specifies CTE for the ordinary and extraordinary refractive index values as well as the temperature difference from the baseline |.z4 VJi4
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3.Loop over the baseline material samples and determine the number of wavelength entries hG~HV{6
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4.Loop over each sampled wavelength entry in the baseline material J#IVu?B
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a.Modify the ordinary and extraordinary refractive index values using (2) above b_&:tE--]
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b.Apply the modified values to the non-baseline material h,\5C/
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5.Set a description on the non-baseline material indicating the temperature change from baseline \3&