As a result, it is reasonable to regard the thick film photo resist as grating with variable refractive index during exposure process.
由于厚层光刻胶折射率在空间上呈缓慢变化的特点，为降低其数值计算量和编程难度，可以将厚层光刻胶近似为折射率随曝光时间变化的光栅。
参考来源 - 期刊学术社区But in the the condition of very high precision, those methods aren't fit, it need to get the sectional drawing of refractive index by measured data in real time and on the spot.
但是，在精度要求很高的情况下，平均折射指数分布模式就不能满足折射误差修正的要求，必须实时实地地获取实测分布剖面。
参考来源 - 对流层折射误差分析Left-handed material is a kind of material, which has negative permittivity and permeability in some frequency range. This property leads to negative refractive index, negative Doppler shift, negative Cherenkov radiation and other related unusual phenomenon.
所谓左手材料就是在一定的频率范围内,它具有负的介电常数和磁导率,进而具有负的折射系数,逆多普勒频移,负切连科夫辐射等一系列与常规材料不同的特性。
参考来源 - 微波段超材料基础应用研究The refractive index in the 100/010 and 001 directions at 1064 nm is 1.8295 and 2.0374, respectively.
在1064nm处的沿100／010和001晶向的折射率分别为1.8295和2.0374。
参考来源 - 几种重要激光晶体的生长与物性研究The density and refractive index of ethyl acetate-isopropanol mixture were measured at 293.15-318.15 K and atmospheric pressure.
常压下测定了乙酸乙酯-异丙醇二元混合液在293.15—318.15 K下的密度和折光率,建立了该二元混合液密度与组成和温度关系的计算方程。
参考来源 - 乙酸乙酯The former one, synthesized from BES and XDI （xylene diisocyanate） through condensation -polymerization, has good optical and mechanical properties: good transmittance, weatherability, high refractive index （1.659）, excellent impact resistance （izod impact strength 25-30kgcm/cm2）, low density （1.34g/cm3） and dispersivity.
其一是采用BES和不变黄二异氰酸酯（XDI）原位聚合得到了折光指数高（1.659）、色散低（阿贝值30.1），耐冲击强度好（IPS=25～30kgcm／cm2）、密度较低（1.34g／cm3）、耐候性好的新型含硫聚氨酯光学塑料，室外放置100天颜色无变化。
参考来源 - 聚氨酯型聚合物光学塑料的设计合成及性能研究·2,447,543篇论文数据，部分数据来源于NoteExpress
同义词： index of refraction
以上来源于: WordNet
N a measure of the extent to which radiation is refracted on passing through the interface between two media. It is the ratio of the sine of the angle of incidence to the sine of the angle of refraction, which can be shown to be equal to the ratio of the phase speed in the first medium to that in the second. In the case of electromagnetic radiation, esp light, it is usual to give values of the absolute refractive index of a medium, that is for radiation entering the medium from free space 折射率 ( symbol: ν, symbol: μ) [physics]
The deceleration gives the new medium a different refractive index.
减速使新介质获得不同的折射率。
Light in the vicinity of the pulse is slowed more and more when the refractive index changes as the pulse passes by.
随着脉冲经过，折射率发生改变，靠近脉冲的光速度越来越慢。
Because shock waves represent a stark and sudden change in refractive index, they show up clearly in schlieren photographs.
因为冲击波反映了折射率的明显和突然的变化，他们能在纹影摄影中清楚地被展现出来。
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