Patent ID: 7684098

Claim:
A system comprising: a beam splitter disposed within a path of a signal source for dividing output from the signal source into a first signal following a first signal path and a second signal following a second signal path, the first signal path being a path for a reference signal and the second signal path being a path of image encryption; a first subsystem to receive the first signal from the signal source and to provide as output therefrom a first output signal; a second subsystem to receive the second signal from the signal source and providing as output therefrom a second output signal; and a third subsystem to combine the first and second output signals; the second subsystem comprising: an input phase mask disposed within the second signal path; a first transforming lens disposed within the second signal path after the input phase mask; a Fourier phase mask disposed within the second signal path after the first transforming lens; a second transforming lens disposed within the second signal path after the Fourier phase mask; and a third transforming lens disposed within the second signal path after the second transforming lens and before the third subsystem.