[HTML][HTML] Open-loop wavefront sensing in the presence of speckle and weak scintillation
In this paper, we show that speckle averaging helps to reduce the measurement error
associated with a Shack–Hartmann wavefront sensor (SHWFS); however, this reduction is …
associated with a Shack–Hartmann wavefront sensor (SHWFS); however, this reduction is …
Closed-loop adaptive optics in the presence of speckle and weak scintillation
In this paper, we show that speckle averaging helps to improve adaptive-optics (AO)
performance in closed loop as a result of reduced measurement error associated with a …
performance in closed loop as a result of reduced measurement error associated with a …
System-level noise performance of coherent imaging systems
We provide an in-depth analysis of noise considerations in coherent imaging, accounting for
speckle and scintillation in addition to “conventional” image noise. Specifically, we formulate …
speckle and scintillation in addition to “conventional” image noise. Specifically, we formulate …
Wave-optics investigation of branch-point density
We use wave-optics simulations to investigate branch-point density (ie, the number of
branch points within the pupil-phase function) in terms of the grid sampling. The goal for …
branch points within the pupil-phase function) in terms of the grid sampling. The goal for …
[HTML][HTML] Simulation of realistic speckle fields by using surface integral equation and multi-level fast multipole method
L Fu, M Daiber-Huppert, K Frenner, W Osten - Optics and Lasers in …, 2023 - Elsevier
This report presents a speckle simulator which calculates rigorously speckle fields with full
randomization from rough surfaces. To achieve this, surface integral equation (SIE) method …
randomization from rough surfaces. To achieve this, surface integral equation (SIE) method …
Speckle decorrelation effects on motion-compensated, multi-wavelength 3D digital holography: theory and simulations
Digital holography enables 3D imagery after processing frequency-diverse stacks of 2D
coherent images obtained from a chirped-frequency illuminator. To compensate for object …
coherent images obtained from a chirped-frequency illuminator. To compensate for object …
Active-tracking scaling laws using the noise-equivalent angle due to speckle
It is well known to system engineers that speckle imposes a limitation on active-tracking
performance, but scaling laws that quantify this limitation do not currently exist in the peer …
performance, but scaling laws that quantify this limitation do not currently exist in the peer …
Improved active tracking performance through a Hadamard speckle contrast reduction
EL Jenkins, DJ Burrell - Optics Letters, 2023 - opg.optica.org
We report wave-optics simulation results and benchtop experimental findings that
demonstrate reduced centroiding error through a Hadamard speckle contrast reduction …
demonstrate reduced centroiding error through a Hadamard speckle contrast reduction …
Effects of speckle decorrelation on motion-compensated, multi-wavelength, 3D digital holography
Digital holography enables 3D imagery after processing frequency-diverse stacks of 2D
coherent images obtained from a chirped-frequency illuminator. To compensate for object …
coherent images obtained from a chirped-frequency illuminator. To compensate for object …
Experimental validation of model-based digital holographic imaging using multi-shot data
T Bate, D O'Keefe, MF Spencer… - … Imaging and Adaptive …, 2022 - spiedigitallibrary.org
Imaging through deep turbulence is a hard and unsolved problem. There have been recent
advances toward sensing and correcting moderate turbulence using digital holography …
advances toward sensing and correcting moderate turbulence using digital holography …