摘要: Broadband phase retrieval needed when: (a) Narrow spectral filters are unavailable. (b) Dim sources. (c) Low throughput due to misalignment. (d) Short exposures times. i.e., Pointing instability (space); and Atmospheric instabilit... 展开 Broadband phase retrieval needed when: (a) Narrow spectral filters are unavailable. (b) Dim sources. (c) Low throughput due to misalignment. (d) Short exposures times. i.e., Pointing instability (space); and Atmospheric instability (ground based AO). Traditional approach is computationally burdensome for extreme bandwidths. Approximate approach: (a) Substitute monochromatic model. (b) Blur model and data. Test case performance: (a) approx. 270x reduction in computational cost for FGS-like test case. (b) Good accuracy for monolithic system. (c) Acceptable accuracy for segmented systems. i.e., Reduced by diffraction and Reduced by higher order segment model. 收起