Apochromatic lens: Compound lens corrected for chromatic aberration, i.e. the three primary colours , red, green and blue are corrected. Also called Apochromat.
Envisics's new system uses three miniaturised lasers, producing the primary colours of red, blue and green, controlled by a customised processing chip and lots of software to produce moving holograms.
复合式透镜：
是红、绿和蓝三
人 Science and technology
个微型激光器，产生红、
全息图。
