Table 1.

Rounded PBR values obtained for different phase masks for autocorrelation and NLR.

Peak-to-Background Ratio	Lens	Axicon	Lens–Axicon Pair	Spiral Fresnel Zone Lens L = 1	Spiral Fresnel Zone Lens L = 5	Cubic Phase Mask	Quasi-random Lens	Randomly Multiplexed Lenses
Autocorrelation	2518	8	99	925	262	61	23	10
NLR	5957	5258	3472	5739	4068	18,147	7565	5977