OpticsInfoBase

Optical turbulence profiling and applications for astronomy

• Abstract
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• Signal Recovery and Synthesis (SRS) 2011 paper: JTuA1
• OSA Technical Digest (CD)
• Wilson, Richard W; Butterley, Timothy; Osborn, James; Shepherd, Harry
• Recovery of the vertical profile of atmospheric turbulence strength from optical crossed-beam measurements is reviewed with particular reference to the effects of deviations from the...

Wide field adaptive optics microscopy using both closed loop correction and image sharpness optimization

• Abstract
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• Signal Recovery and Synthesis (SRS) 2011 paper: JTuA2
• OSA Technical Digest (CD)
• Bourgenot, Cyril; Love, Gordon D; Saunter, Christopher D; Girkin, John M
• We report on results from a wide field microscope fitted with adaptive optics. We describe results based on both image optimization (wavefront sensorless adaptive optics) and full...

Exact Theory of Adaptive Optics Speckle and its Applications

• Abstract
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• Signal Recovery and Synthesis (SRS) 2011 paper: JTuA3
• OSA Technical Digest (CD)
• Yaitskova, Natalia; Gladysz, Szymon; Gudimetla, Rao
• We derive the first order statistical moments of intensity of AO corrected images. We demonstrate that applicability of one or another distribution law depends not only on the level of...

Cumulative Wavefront Reconstructor for Single Conjugate Adaptive Optics

• Abstract
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• Signal Recovery and Synthesis (SRS) 2011 paper: JTuA4
• OSA Technical Digest (CD)
• Zhariy, Mariya
• We present a wavefront reconstructor for the Shack-Hartmann wavefront sensor with linear complexity. This algorithm allows for a simple adaptation to the aperture geometry. We derive...

Correct normalization of scintillation autocovariance for generalized SCIDAR: Theory and application

• Abstract
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• Signal Recovery and Synthesis (SRS) 2011 paper: JTuA5
• OSA Technical Digest (CD)
• Avila, Remy
• I present the theory for the correct normalization of scintillation autocovariance for the generalized SCIDAR and the application to turbulence profile measurements at San Pedro Martir...

Image Quality Estimate of a Head Mounted Display for Low Vision Aids

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• Signal Recovery and Synthesis (SRS) 2011 paper: JTuB6
• OSA Technical Digest (CD)
• Lavigne, Jean-Francois; Claveau, Fabien; Melancon, Stephane; Lagacé, François; Leclerc, Mélanie; Prevost, Donald
• The image quality of a HMD apparatus composed of a camera, a data processing chain, a display and a reimaging optical element is evaluated. Its most problematic components are...

Color Spaces Analysis of Photoelasticity Images of Plastics Thin Films

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• Signal Recovery and Synthesis (SRS) 2011 paper: JTuB7
• OSA Technical Digest (CD)
• Restrepo, Alejandro; Lopez, Francisco
• This paper presents preliminary studies of RGB and HSV color spaces analysis for polarized light images of plastic films under tensile deformation. The results obtained show a tool for...

Image Reconstruction in Optical Interferometry

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• Signal Recovery and Synthesis (SRS) 2011 paper: JTuC1
• OSA Technical Digest (CD)
• Thiébaut, Eric
• Inverse problem approach is a suitable framework to analyze the issues in image reconstruction from interferometric data. It can be exploited to describe and formally compare the new...

Improving Retinal Resolution by Multiple Oversampling

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• Signal Recovery and Synthesis (SRS) 2011 paper: JTuC2
• OSA Technical Digest (CD)
• Meitav, Nizan; Ribak, Erez N
• We take advantage of ocular saccades to average out some of the high order aberrations. Combining a long sequence of oversampled retinal images we were able to resolve single cells...

Measurement of Packing and Spacing of Photoreceptors

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• Signal Recovery and Synthesis (SRS) 2011 paper: JTuC3
• OSA Technical Digest (CD)
• Meitav, Nizan; Ribak, Erez N
• We developed two automated methods for measuring the hexagon size and the fraction of hexagonally packed cones. Density is mostly set by adjacent cones, decreasing with eccentricity....

Adaptive Optics Enabled Wavefront Diversity Sensing

• Abstract
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• Signal Recovery and Synthesis (SRS) 2011 paper: JTuC4
• OSA Technical Digest (CD)
• Wirth, Allan; Gonsalves, Robert; Jankevics, Andrew
• Phase diversity has proven a viable technique for wavefront sensing but converges too slowly for real-time applications. The small wavefront changes in a closed loop system allow much...

Joint-Optimization of Phase-Diversity and Adaptive Optics

• Abstract
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• Signal Recovery and Synthesis (SRS) 2011 paper: JTuC5
• OSA Technical Digest (CD)
• Korkiakoski, Visa; Keller, Christoph; Doelman, Niek; Fraanje, Rufus; Verhaegen, Michel
• We demonstrate the potential of joint-optimization of adaptive optics (AO) and phase-diversity (PD). The wavefront sensor information reduces computational costs by a factor of 20, and...

FTS Measurements of Uranium Emission Lines in the Near-Infrared and their Application to the Search for Earth-Mass Exoplanets

• Abstract
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• Signal Recovery and Synthesis (SRS) 2011 paper: JWA1
• OSA Technical Digest (CD)
• Redman, Stephen; Lawler, James E; Nave, Gillian; Ramsey, Lawrence; Mahadevan, Suvrath
• Precise calibrations are needed for high-resolution near-infrared astronomical spectrographs. We have measured the wavenumbers of over 7500 uranium emission lines and used a subset of...

Recovery of Exoplanetary Signals in Re-dispersed Speckle Clutter

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• Signal Recovery and Synthesis (SRS) 2011 paper: JWA10
• OSA Technical Digest (CD)
• Gladysz, Szymon; Ribak, Erez N
• We use a Wynne corrector to radially disperse images of exoplanets while shortening the stellar speckles. This results in a morphological difference between speckles and sources...

Kerr-induced nonlinear focal shift measurements

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• Signal Recovery and Synthesis (SRS) 2011 paper: JWA11
• OSA Technical Digest (CD)
• Boudebs, Georges
• We report on third order optical nonlinear experimental characterization through focal shift measurements. The focus in the nonlinear regime is related to the nonlinear phase shift....

Improvement Of Image Resolution Beyond Classical Limit By Phase-Sensitive Optical Parametric Amplifier

• Abstract
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• Signal Recovery and Synthesis (SRS) 2011 paper: JWA12
• OSA Technical Digest (CD)
• Huang, Zun; French, Doug; Jovanovic, Igor; Pao, Hsueh-Yuan
• When an optical parametric amplifier (OPA) operated as a phase-sensitive amplifier (PSA) is used for point source imaging, the angular resolution improvement can defeat the classical...

Numerical Simulations of Metamaterial-based Infrared Sensor for Remote Environmental Monitoring

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• Signal Recovery and Synthesis (SRS) 2011 paper: JWA13
• OSA Technical Digest (CD)
• Popov, Alexander K; Myslivets, Sergey A
• The possibility of creation of all-optically controlled, remotely actuated, ultraminiature nonlinear-optical sensor which utilizes negative-index metamaterial and can be exploited for...

Widefield ultrastable heterodyne interferometry using a custom CMOS modulated light camera

• Abstract
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• Signal Recovery and Synthesis (SRS) 2011 paper: JWA14
• OSA Technical Digest (CD)
• Patel, Rikesh; Clark, Matt; Achamfuo-Yeboah, Samuel
• A method of detecting optical heterodyne interferometry fringes using a custom CMOS modulated light camera array has been developed. Widefield phase images are generated using...

Tunable Single Pixel MEMS Fabry-Perot Interferometer

• Abstract
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• Signal Recovery and Synthesis (SRS) 2011 paper: JWA15
• OSA Technical Digest (CD)
• Rivas, Annette; Kerekes, John; Raisanen, Alan
• Typically, MEMS Fabry Perot devices use electrostatic actuation to control mirror spacing and snap in is an issue. A thermally actuated device has been modeled in COMSOL that lifts the...

Aircraft Measurements of the Aerosol Direct Radiative Effect

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• Signal Recovery and Synthesis (SRS) 2011 paper: JWA16
• OSA Technical Digest (CD)
• LeBlanc, Samuel E; Schmidt, Sebastian; Pilewskie, Peter
• Aerosol relative forcing efficiency obtained from multiple field experiments is used to compare the direct radiative effect of various different aerosol types.