Abstract: Digital holography is based on the optical holography.The hologram is recorded by CCD and transferred to a computer.The reconstruction is fulfilled digitally in the computer with the simulated reference wave,and the quantitive amplitude and phase information of the whole wave field can be obtained from only a single hologram.Thus the digital holography has many potential applications.The study of the digital holography applied to the experimental teaching of the modulation principium for the propagation of the object wave,not only make the students have the vision and intuitionistic comprehension with the modulation principium for the propagation of the object wave,but also exercise their ability to apply the knowledge through completing the numerical reconstruction of the digital hologram by programming calculation.Furthermor extend their professional knowledge and learn the cutting edge of scientific development.

Key words: digital holography, experimental teaching, propagation of the object wave, numerical reconstruction