Implementation of ternary phase amplitude filters using a magnetooptic spatial light modulator

Abstract

Ternary modulation can be achieved with a single SLM and improvedc orrelationd iscriminationc an bee xperimentally realized.

Advanced Concepts in Distortion-Invariant Phase-Only Filter Design

“…Thus for 3 = 0 and (3= nt/2, the filters mental in determining R*. PCEeF(R) in equation (31) identified by the above algorithm will indeed yield the is the same as iq(R) in equation (45) if we assign x, = SMR, proper correlation outputs. We have shown in appenand y, = Sf, for i = 1,2 ....…”

“…Compute the associated PCE•,or from equation is, we can assume that the optimal BPOF is of the form (31). Do this for i 1,2. .…”

Quantised phase filters with binary low and high pass amplitude response: the effect of quantisation for scale and rotation input distortions

“…These include the use of phase-only filters (POFs) [3,4], circular harmonic expansion (CHE) functions [5], rotationally multiplexed holograms [6], synthetic discriminant functions (SDFs) [7,8], minimum average correlation energy (MACE) filters [9], phase with constrained amplitude filters (PCMF) [10], the Wiener filter [11,12], and the ternary phase-amplitude filter (TPAF) [13][14][15].…”

Pseudorandom encoding for real-valued ternary spatial light modulators

“…Two SLM's that produce such real ternary modulation are magnetooptic SLM's and analog chiral smectic liquid-crystal SLM's. 13,14 Our objectives in this paper are ͑1͒ to demonstrate the feasibility of complex-valued representation by use of mMD-PRE with a real-valued ternary modulation characteristic, ͑2͒ to demonstrate the improvements over MDE alone, and ͑3͒, for the encoding of a strictly real function, to show the improvements of MD-PRE over MDE. These encoding algorithms also illustrate in brief the same general characteristics and performance trends that were reported for the application of these methods to various quantized phase SLM's in Ref.…”