Results 201 to 210 of about 5,531 (246)

Holography—the reconstruction of wavefronts

Electronics and Power, 1966
This account, by a pioneer in the field, of the principles and development of holography raises the questions of how are we to profit from holographic techniques, and what are we to learn from the mathematical principles embodied therein?
openaire   +1 more source

Wavefront reconstruction using smartphone based wavefront sensors

SPIE Proceedings, 2015
Smartphone camera system has the capability of being integrated into powerful field-sensing tools, capturing data and sharing these data with computing servers or cloud experts. The purpose of this work is to implement a wavefront sensor based on the smartphone platform, which has many potential applications in thin-films and bio-related sensing areas.
Zhenyu Yang, Qiwen Zhan
openaire   +1 more source

Wavefront reconstruction error of Shack-Hartmann wavefront sensors

Publications of the Astronomical Society of the Pacific, 1994
We have evaluated the wavefront reconstruction error for Shack-Hartmann wavefront sensors based on a series of simulations for various numbers of subapertures at various levels of measurement error in determining the Hartmann spot centroids. The optimum number of subapertures is derived for a given magnitude reference star in the cases of photon-noise ...
N. Takato, M. Iye, I. Yamaguchi
openaire   +1 more source

Reconstructed Wavefronts and Communication Theory*

Journal of the Optical Society of America, 1962
A two-step imaging process discovered by Gabor involves photographing the Fresnel diffraction pattern of an object and using this recorded pattern, called a hologram, to construct an image of this object. Here, the process is described from a communication-theory viewpoint.
Emmett N. Leith, Juris Upatnieks
openaire   +1 more source

Wavefront Reconstruction Methods

Journal of Refractive Surgery, 2009
Douglas D, Koch, Li, Wang, Dimitri A, Chernyak   +2 more
openaire   +3 more sources

Zonal wavefront reconstruction with multidirectional difference wavefronts for multilateral shearing interferometers

Applied Optics
Wavefront reconstruction is a key step in multilateral shearing interferometers, directly influencing measurement accuracy. Conventional zonal reconstruction methods typically use only two orthogonal difference wavefronts, which limits measurement accuracy.
Hui, Zhong, Yanqiu, Li, Ke, Liu, Xiting, Han, Tao, Wang, Zhe, Zhao   +5 more
openaire   +2 more sources

Shearing Interferometry by Wavefront Reconstruction

Journal of the Optical Society of America, 1968
Lately, practical applications for holographic techniques have been found in interferometry. These techniques are usefully applied to shearing interferometry. Different kinds of shear are treated, and in several cases the optical system is significantly simplified, compared to the corresponding conventional setups.
openaire   +1 more source

An Application of Wavefront Reconstruction to Interferometry

Applied Optics, 1965
The method of wavefront reconstruction can be used in three ways to extend the usefulness of interferometry. First, a multiple fringe interferogram with a different fringe spacing, and/or a zero-order interferogram can be produced from a multiple fringe interferogram.
openaire   +1 more source

Iterative wavefront reconstruction for strong turbulence using Shack–Hartmann wavefront sensor measurements

Journal of the Optical Society of America A: Optics and Image Science, and Vision, 2021
Jae Jun Kim, Brij Agrawal
exaly  

Hybrid wavefront reconstruction from multi-directional slope and full curvature measurements using integral equations with higher-order truncation errors for wavefront sensors

Optics and Lasers in Engineering, 2022
Yanqiu Li, Zhigang Liu
exaly