Below we briefly describe the differences between the old and new aberration correction algorithms. The previous SPK light time correction algorithms introduce ...
NASA Website
Below we briefly describe the differences between the old and new aberration correction algorithms. The previous SPK light time correction algorithms ...
The objective of this project was to demonstrate the use of multiple distributed deformable mirrors (DMs) to improve the performance of optical systems with distributed aberrations. This concept is expected to provide dramatic improvement in the optical performance of systems in applications where the aberrations are distributed along the optical path or ...
Energy Citations Database
We have developed an image processing algorithm that reduces lateral chromatic aberration. It has been implemented in Nikon digital single-lens-reflex cameras and application software. We have developed the aberration detection method which analyzes capture images and detect the aberrations of the image without ...
NASA Astrophysics Data System (ADS)
Aug 27, 2007 ... No convenient way is provided to invoke the old-style aberration correction algorithms for velocity. Alternative Implementation Approach Add ...
The "new" routines use improved aberration correction algorithms, so output values obtained from these routines will be slightly different from those obtained ...
Chromatic aberration is a form of aberration in color optical devices that produces undesirable color fringes along borders within images. It is becoming a more critical problem these days as digital cameras are getting smaller, while the number of picture elements is increasing. We propose a novel method for detecting and eliminating chromatic ...
Even the best optical microscopes available on the market exhibit chromatic aberrations to some extent. In some types of study, chromatic aberrations of current optics cannot be neglected and a software correction is highly desirable. This paper describes a novel method of chromatic aberration measurement and ...
PubMed
The Solid-State, Heat-Capacity Laser (SSHCL), under development at Lawrence Livermore National Laboratory is a large aperture (100 cm{sup 2}), confocal, unstable resonator requiring near-diffraction-limited beam quality. There are two primary sources of the aberrations in the system: residual, static aberrations from the fabrication of the optical ...
DOE Information Bridge
The Solid-State, Heat-Capacity Laser (SSHCL), under development at Lawrence Livermore National Laboratory (LLNL) is a large aperture (100 cm{sup 2}), confocal, unstable resonator requiring near-diffraction-limited beam quality. There are two primary sources of the aberrations in the system: residual, static aberrations from the fabrication of the optical ...
We have developed and tested a method for minimizing static aberrations in adaptive optics systems. In order to correct the static phase aberrations, we need to measure the aberrations through the entire system. We have employed various phase retrieval algorithms to detect these ...
In the paper the optical diffraction tomographic system for reconstruction of the internal refractive index distribution in optical fiber utilizing grating Mach-Zehnder interferometer configuration is explored. The setup applies afocal imaging. Conventional grating application gives, however, highly aberrated object beam producing incorrect refractive-index reconstructions. ...
Two different methods have been derived and implemented for simulation of multipole imaging systems and aberration correctors. The first method uses an aberration theory for combinations of multipole lenses and deflectors, including primary and secondary aberrations up to the fifth order. A damped least-squares ...
A compact retinal camera with adaptive optics which was designed for clinical practice was used to test a new adaptive optics control algorithm to correct for the angular ray deviations of a model eye. The new control algorithm is based on pupil movements rather than the measurement of the slopes of the wavefront with an optoelectronic ...
We present experimental and theoretical results on aberration control in solid state laser amplifiers and resonators. In lasers with diffraction-limited beam quality, aberrations cause diffraction losses that reduce the output power. In laser amplifiers, aberrations in the active medium degrade the beam quality of the amplified beam. ...
Feb 9, 2009 ... No convenient way is provided to invoke the old-style aberration correction algorithms for velocity. Alternative Implementation Approach Add ...
Aug 15, 2006 ... Since a focal-plane array detector is employed, the computation of tip-tilt is accomplished automatically as part of wavefront aberration ...
Adaptive optics (AO) has been recently used for the development of ophthalmic devices. Its main objective has been to obtain high-resolution images for diagnostic purposes or to estimate high-order eye aberrations. The core of every AO system is an optical device that is able to modify the wavefront shape of the light entering the system; if you know the shape of the incoming ...
... surface membrane to correct for aberrations. ... less curvature results in less aberration. ... a negative conic constant helps reduce spherical aberration. ...
DTIC Science & Technology
An aberration correction method based on the maximization of the wave intensity at the focus of an emitting array is presented. The potential of this new adaptive focusing technique is investigated for ultrasonic focusing in biological tissues. The acoustic intensity is maximized non invasively through the direct measurement or indirect estimation of the ...
PubMed Central
... The goal was to investigate methods to correct aberrations in the ... with entrapped non-neutral electron distributions to correct spherical aberration. ...
... Accession Number : ADA319052. Title : Demonstrating Optical Aberration Correction With a Mems Micro-Mirror Device. ...
... Accession Number : ADA800275. Title : Correction of Spherical Aberration by a Phased Line Source. Corporate Author : AIR ...
Information from imaging and diffraction planes, or real and reciprocal spaces, of transmission electron microscopes (TEM) can be combined using iterative transformation algorithms to reconstruct the complex wave function, to improve image resolution and to remove residual aberrations in the case of aberration ...
... Title : On the Correctness of Orphan Management Algorithms. ... In this paper, two such orphan management algorithms are analyzed. ...
We provide an adjustment factor for ablation algorithms used in photorefractive laser surgery that takes into account how laser polarization in reflection losses affects the cornea. We evaluate the influence of this factor on corneal radius and asphericity after surgery, showing that it is significant for visual performance (effective visual acuity is reduced) and for the ...
The paper describes the design of an inexpensive holographic optical tweezers setup. The setup is accompanied by software that allows real-time manipulation of the sample and takes into account the experimental features of the setup, such as aberration correction and LCD modulation. The LCD, a HoloEye LCR-2500, is the physical support of the holograms, ...
