منابع مشابه
Microgenetic optimization algorithm for optimal wavefront shaping.
One of the main limitations of utilizing optimal wavefront shaping in imaging and authentication applications is the slow speed of the optimization algorithms currently being used. To address this problem we develop a microgenetic optimization algorithm (μGA) for optimal wavefront shaping. We test the abilities of the μGA and make comparisons to previous algorithms (iterative and simple-genetic...
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Multilevel algorithms are proposed for reordering sparse symmetric matrices to reduce the wavefront and proole. A graph representation of the matrix is used and two graph coarsening methods are investigated. A multilevel algorithm that uses a maximal independent vertex set for coarsening and the Sloan algorithm on the coarsest graph is shown to produce orderings that are of a similar quality to...
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Phase distortions due to scattering in random media restrict optical focusing beyond one transport mean free path. However, scattering can be compensated for by applying a correction to the illumination wavefront using spatial light modulators. One method of obtaining the wavefront correction is by iterative determination using an optimization algorithm. In the past, obtaining a feedback signal...
متن کاملGlare Reduction Using 4D Ray Sampling
For this project, I set out to reproduce the work done by Raskar et al. [6] back in 2008, only with a light field camera instead of a standard camera with pinhole array mask. I was able to replicate the basic method described in the original paper and went beyond this simple algorithm to explore some of the trade space in ray sampling. I looked at the effects of determining outliers using diffe...
متن کاملSurface-plasmon wavefront and spectral shaping by near-field holography
A R TI CL E Abstract Surface-plasmon-polariton waves are twodimensional electromagnetic surface waves that propagate at the interface between a metal and a dielectric. These waves exhibit unusual and attractive properties, such as high spatial confinement and enhancement of the optical field, and are widely used in a variety of applications, such as sensing and subwavelength optics. The ability...
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ژورنال
عنوان ژورنال: Optica
سال: 2016
ISSN: 2334-2536
DOI: 10.1364/optica.3.001104