It turns that the main factor is the monochromaticity of the light. Material absorb is the secondary.
试验证明了入射光单色性是影响曲线变化的主要因素，材料吸收是次要因素。
参考来源 - 晶体材料折射率的测量方法研究·2,447,543篇论文数据，部分数据来源于NoteExpress
Cool light, Good monochromaticity. High luminous efficacy.
冷光源，单色性好，发光效率高。
Its request for monochromaticity of source is low. The equipments and procedure of this method are simple, but suitable for quarter-wave plates of various wave lengths.
此方法对光源的单色性要求低，新需器材及实验方法简便，并且适于各种波长的四分之一波片。
CCD as receiver is used to analyze spectrum and measure color. Orientation of optic spectrum line is affected on silt of monochromaticity and size of CCD photosensitive unit.
CCD作为光谱分析和测色仪器的光谱接收器件，光谱谱线定位受单色仪狭缝和CCD光敏元尺寸影响。
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