It has been found in the experiment that a reverse of image appeared in the wavelength range between 550nm to 620nm at which the enhancement of absorption of the probe beam appeared after a while of the probe time or readout time delaying 实验中发现，经过一段弛豫时间后，在出现吸收增强现象的550nm 620nm调制光波长范围内，有图像反转的现象。
