Diffractive Optical Element Beam Splitting Uniformity

The patent applies asymmetry by introducing deliberate disturbances to the light-splitting point array. Instead of using a perfectly regular arrangement, the patent perturbs the positions of light-splitting points to break the symmetry that causes vector effects. This asymmetric disturbance compensates for the non-uniformity introduced by large field of view, achieving more uniform energy distribution across the speckle array while maintaining the desired field of view coverage.

The patent employs parameter changes by systematically adjusting the disturbance magnitude and pattern of light-splitting points. The disturbance parameters are optimized to achieve the right balance: enough disturbance to compensate for vector effects and improve uniformity, but not so much that it causes overlap or gaps between adjacent speckle blocks. This involves tuning parameters such as disturbance amplitude, frequency, and spatial distribution to maintain structural integrity while achieving uniformity.

The patent applies preliminary action by pre-disturbing the light-splitting point array before applying the Gerchberg-Saxton algorithm. Instead of relying solely on the scalar algorithm to handle vector effects, the patent performs a preliminary disturbance of the point array positions to pre-compensate for expected vector effects. This preliminary action creates a modified initial configuration that, when processed by the GS algorithm, produces a final pattern with improved uniformity that accounts for vector effects at large fields of view.