STUDY ON DOF OF AN OPTICAL SYSTEM
一般光学系统图象自由度几个问题的研究

The image formation of an optical system to investigated,in points out thatthe number of degrees of freedom(DOF)of an image is unaffectedby abberations (cohe-rent case)or PTF(incoherent case).and new methods to acquire the amount of informa-tion is proposed.