Possible use of phase holograms as optical elements

A theoretical analysis is made of the possibility of using suitably prepared holograms in the formation of wave fronts of different shapes. In some cases such holograms can replace multilens objectives. The necessary condition for successful application of such holographic optical elements is a low value of the light losses. A phase hologram of diffraction efficiency of about 70% was prepared and used in holographic systems in which light transmission was comparable with that in conventional optical systems.