This article was understanding comprehensively the hologram "interferes the record,the diffraction reappearance" in the principle foundation,analyzed various factors which influence laser hologram experiment,and carried on the deep discussion to these factors to improve the hologram quality,and proposed the concrete solution.

The paper describes a brief account of the technique of laser hologram,summarizing the conditions of taking a laser holographic picture pointing out the matters needing attention and supplying the applicative prospects for laser holograph.

he characterists and available limits of three measuring methods,measuring microscope(comparator),spectrometer(goniometer)and Frauhofer diffraction,of holograph grating constant are discussed.

Introducing grating aided wihte light reproduction hologram into the holograph experiment;