Complex local modulation of light fields using random phase-only masks

Abstract

An iterative algorithm of high resolution is presented that resolves the complex local modulation problem of light fields by determining random phase-only masks. The algorithm is constructed from the discrimination of spatial frequencies of the target field. The relation between the maximum intensity values of the incident and target fields allows quantifying the level of accuracy accepted by the user. The advantages and disadvantages of this approach are shown and discussed. The high quality obtained in the random phase-only masks calculation suggests the implementation of double image encryption methods when the incident field possesses amplitude and phase random values.