The characteristics of the delayed light emission (DLE) which is emitted from green plants several seconds after excitation can be used to evalute and grade fruits and vegetables according to their maturity and color nondestructively.

• 利用植物受光辐射后存在短暂、微弱的延迟发光特性(DLE),可对果蔬按成熟度及颜色等内,外品质进行无损检测和分级。