Journal ArticleDOI
Zernike polynomials and atmospheric turbulence
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In this paper, a Zernike representation of the Kolmogoroff spectrum of turbulence is given that provides a complete analytical description of the number of independent corrections required in a wave-front compensation system.Abstract:
This paper discusses some general properties of Zernike polynomials, such as their Fourier transforms, integral representations, and derivatives. A Zernike representation of the Kolmogoroff spectrum of turbulence is given that provides a complete analytical description of the number of independent corrections required in a wave-front compensation system.read more
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Optical communications using orbital angular momentum beams
Alan E. Willner,Hao Huang,Yan Yan,Yongxiong Ren,Nisar Ahmed,Guodong Xie,Changjing Bao,Long Li,Yinwen Cao,Zhe Zhao,Jian Wang,Martin P. J. Lavery,Moshe Tur,Siddharth Ramachandran,Andreas F. Molisch,Nima Ashrafi,Solyman Ashrafi +16 more
TL;DR: In this article, the authors review recent progress in OAM beam generation/detection, multiplexing/demultiplexing, and its potential applications in different scenarios including free-space optical communications, fiber-optic communications, and RF communications.
Journal ArticleDOI
Monochromatic aberrations of the human eye in a large population.
TL;DR: In this paper, a modified Hartmann-Shack wavefront sensor was used to measure the monochromatic wave aberration of both eyes for 109 normal human subjects across a 5.7mm pupil.
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Solar Image Restoration By Use Of Multi-frame Blind De-convolution With Multiple Objects And Phase Diversity
TL;DR: In this paper, an extension of Joint Phase Diverse Speckle image restoration is presented, where multiple realizations of multiple objects having known wavefront relations with each other can now be restored jointly.
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Pattern recognition with moment invariants: a comparative study and new results
TL;DR: The authors show that the new method of deriving Zernike moment invariants along with the new normalization scheme yield the best overall performance even when the data are degraded by additive noise.
Journal ArticleDOI
Contribution of the cornea and internal surfaces to the change of ocular aberrations with age
TL;DR: The results suggest that the degradation of the ocular optics with age can be explained largely by the loss of the balance between the aberrations of the corneal and the internal surfaces.
References
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Journal ArticleDOI
Statistics of a Geometric Representation of Wavefront Distortion
TL;DR: In this paper, a statistical definition for the geometric shape of a randomly distorted wavefront was established and relationships between the phase-structure function and the statistics governing the shape were derived.
Journal ArticleDOI
Phase compensation for thermal blooming.
Lee C. Bradley,Jan Herrmann +1 more
TL;DR: Appropriate correction of the initial phase of a laser beam is shown by numerical computation to be capable of appreciably reducing thermal blooming for a cw beam.