Apochromatic lens: Compound lens corrected for chromatic aberration, i.e. the three primary colours , red, green and blue are corrected. Also called Apochromat.
矫正色差的复合式透镜：即是红、绿和蓝三原色的色差都已矫正。
However,in the processing of multispectral and hyperspectral,the usage of this technology has been restricted because of the unconsidering the chromatic aberration.
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