Patent ID: 11828935

Abstract:
A method for designing a device for multi-plane conversion of light radiation, the device implementing a plurality M of phase masks intercepting the light radiation in order to phase-shift the radiation for applying a predetermined transformation to the light radiation. First and second mode families (u,v) with separable variables (x,y) are defined. A number N of pairs of indices {i,j}k is chosen to form first and second used mode families, respectively, by selecting the modes of index pairs {i,j}k from the first mode family and from the second mode family, respectively. Next, the phase-shift quantities ϕ1(x,y) are established, the M phase masks making it possible to transform each mode of index pairs {i,j)k of the first used mode family into the mode of the same index pair {i,j}k of the second used mode family. A phase plate may be obtained by means of the design method and used in a multi-plane conversion device.