Industry Headlines - LEI Optics Inc.

LEI Optics, Inc. formerly Lightwave Enterprises, Inc.

Industry Headlines
Journal of the Optical Society of America A
Journal of the Optical Society of America A

Adaptive control in an adaptive optics experiment Salman Monirabbasi, Steve Gibson This paper presents results from an adaptive optics experiment in which an adaptive control loop augments a classical adaptive optics feedback loop. Closed-loop wavefront errors measured by a self-referencing interferometer are fed back to the control loops, which drive a membrane deformable mirror ... [J. Opt. Soc. Am. A 27, A84-A96 (2010)] Comparison of depth-of-focus-enhancing pupil masks based on a signal-to-noise-ratio criterion after deconvolution Fr?ric Diaz, Fran?s Goudail, Brigitte Loiseaux, Jean-Pierre Huignard We consider optimization of hybrid imaging systems including a pupil mask for enhancing the depth of field and a digital deconvolution step. In a previous paper [Opt. Lett.34, 2970 (2009)] we proposed an optimization criterion based on the signal-to-noise ratio of the restored image. We use this ... [J. Opt. Soc. Am. A 27, 2123-2131 (2010)] Designing coupled free-form surfaces R. Andrew Hicks, Christopher Croke The problem of designing optical systems that contain free-form surfaces is a challenging one, even in the case of designing a single surface. Here we present a method for the coupled design of two free-form reflective surfaces that will have a prescribed distortion. On one hand, the method can be ... [J. Opt. Soc. Am. A 27, 2132-2137 (2010)] Evolution of the scintillation index and the optical vortex density in speckle fields after removal of the least-squares phase Mingzhou Chen, Filippus S. Roux Knowledge of the behavior of stochastic optical fields can aid the understanding of the scintillation of light propagating through a turbulent medium. For this purpose, we perform a numerical investigation of the evolution of the scintillation index and the optical vortex density in a speckle field ... [J. Opt. Soc. Am. A 27, 2138-2143 (2010)] Color constancy based on texture pyramid matching and regularized local regression Meng Wu, Jun Sun, Jun Zhou, Gengjian Xue Considering that no single algorithm available is universal in color constancy, we propose an effective combination approach using a texture-based matching strategy and a local regression with prior-knowledge regularization. To represent the images, we construct a texture pyramid using an ... [J. Opt. Soc. Am. A 27, 2097-2105 (2010)] Number of discernible colors for color-deficient observers estimated from the MacAdam limits Esther Perales, Francisco Miguel Mart?z-Verd?o?Manuel Maciel Linhares, S?io Miguel Cardoso Nascimento We estimated the number of colors perceived by color normal and color-deficient observers when looking at the theoretic limits of object-color stimuli. These limits, the optimal color stimuli, were computed for a color normal observer and CIE standard illuminant D65, and the resultant colors were ... [J. Opt. Soc. Am. A 27, 2106-2114 (2010)] Probabilistic spectral model of color halftone incorporating substrate fluorescence and interface reflections Li Yang A spectral model incorporating three major physical phenomena, lateral light scattering, substrate fluorescence, and interface reflections governing light-print interaction is presented. In the model, light scattering inside a paper substrate is described by probabilities applicable for any degree ... [J. Opt. Soc. Am. A 27, 2115-2122 (2010)] Real-time turbulence profiling with a pair of laser guide star Shack?Hartmann wavefront sensors for wide-field adaptive optics systems on large to extremely large telescopes L. Gilles, B. L. Ellerbroek Real-time turbulence profiling is necessary to tune tomographic wavefront reconstruction algorithms for wide-field adaptive optics (AO) systems on large to extremely large telescopes, and to perform a variety of image post-processing tasks involving point-spread function reconstruction. This paper ... [J. Opt. Soc. Am. A 27, A76-A83 (2010)] Statistics of intensity in adaptive-optics images and their usefulness for detection and photometry of exoplanets Szymon Gladysz, Natalia Yaitskova, Julian C. Christou This paper is an introduction to the problem of modeling the probability density function of adaptive-optics speckle. We show that with the modified Rician distribution one cannot describe the statistics of light on axis. A dual solution is proposed: the modified Rician distribution for off-axis ... [J. Opt. Soc. Am. A 27, A64-A75 (2010)] Modeling and parameter estimation for point-actuated continuous-facesheet deformable mirrors Curtis Vogel, Glenn Tyler, Yang Lu, Thomas Bifano, Rodolphe Conan, Celia Blain We present a variant of the model introduced by Vogel and Yang [J. Opt. Soc. Am. A23, 1074 (2006)] for point-actuated deformable mirrors (DMs) with continuous facesheets, and we describe a robust efficient regularized- output least-squares computational scheme to estimate the parameters in the ... [J. Opt. Soc. Am. A 27, A56-A63 (2010)]

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