Hologram production and reproduction system - has sets of object and reference waves for production and uses projection waves identical to the reference waves

摘要

The system for production and reproduction of a hologram utilises two identical object waves with constant phase displacement and two reference waves to produce two holograms which are then simultaneously illuminated by two reproduction waves, when they are required to be reproduced or projected, which are identical to the reference waves used during production of the holograms is constructed such that the portions of maximum light intensity on one of the hologram layer represent portions of minimum light on the other hologram and vice versa.