In high power laser systems, ghost light can be so strong to damage optical elements, air may be ionized, resulting in the quality of light going bad. There fore, it is rather important to locate the ghost images and to calculate the intensity of ghost images quantitatively. The method of mirror imaging is introduced to deal with the multi - axial optical system, that is,all dements are imaged to axis of one dement, after analysize the ghost image of the equivalent optical system, then the ghost ima...
