&lt;title&gt;Real-time holographic compensation of large optics for space deployment&lt;/title&gt;

Guthals, D.; Sox, D.; Joswick, M. D.; Rodney, P. J.

doi:10.1117/12.367596

Cited by 4 publications

(7 citation statements)

References 4 publications

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“…While earlier demonstrations [3][4][5][6]8 showed dramatic improvements in wavefront quality resulting from diffractive wavefront control, correction to near-diffraction-limited wavefront fidelity was not reported. In order to investigate the fidelity of wavefront control with the PDO setup, described elsewhere, 7 we position a static glass plate aberrator in front of the PDO and perform interferometric measurements of a 532-nm wavefront reflected from the combined PDO/aberrator pair.…”

Section: Near-diffraction-limited Wavefront Compensationmentioning

confidence: 89%

Near-diffraction-limited compensated imaging and laser wavefront control with programmable diffractive optics

et al. 2002

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A prototype programmable diffractive optics system demonstrates large aberration compensation and versatile laser wavefront control. This high-resolution phase modulator compensates large aberrations with high fidelity and highoptical efficiency via modulo-2π phase subtraction. Demonstrations include compensated imaging with monochromatic light, laser beam steering with aberration compensation, and both on-axis and off-axis aberration compensation in a telescope system. Compensated wavefront fidelities approach the diffraction limit. "

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Section: Near-diffraction-limited Wavefront Compensationmentioning

confidence: 89%

Near-diffraction-limited compensated imaging and laser wavefront control with programmable diffractive optics

et al. 2002

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“…In the latter case, the spectral bandwidth limitation is imposed by the chromatic angular dispersion associated with diffraction. 5 Recent developments in high-pixel-number computer-addressable two-dimensional phase-modulating systems 6,7 create the opportunity to display high-resolution modulo-2π diffractive phase profiles. However, the practical application of diffractive wavefront control with discrete element addressing poses some unique challenges.…”

Section: Introductionmentioning

confidence: 99%

“…9 Similar demonstrations of large-aberration compensation have since been performed with liquid-crystal on silicon phase modulators. 5,10 In this paper, we present an analysis of a diffractive phase modulating system that includes modeling and measurement of the effects of phase modulation with discrete element addressing, a tunable fill factor, and an inter-pixel influence function. We also present a method for linearizing the system phase response and measurements of diffraction efficiency and wavefront fidelity of this setup when used for aberration compensation.…”

Section: Introductionmentioning

confidence: 99%

Programmable diffractive optics for high-fidelity wavefront control

et al. 2002

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High-fidelity wavefront control is demonstrated via programmable modulo-2π two-dimensional phase profiles displayed on a high-resolution computer-addressable phase modulator system. This prototype setup operates with 307,200 independently addressable elements and a fill-factor and interpixel influence function that are controlled via spatial filtering in a Fourier plane. Nonlinearities in the phase response are compensated computationally. Aberration compensation with better than 1/4-wave peak-to-peak fidelity is demonstrated."

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“…The authors of [67] compensated for the distortions tens wavelengths in magnitude of a mirror surface by means of OASLM. The mirror had its diameter of 0.75 m and curvature radius of 6 m. The distortions were caused by thermal and mechanical fluctuations and air turbulence.…”

Section: Super-light Mirrorsmentioning

confidence: 99%

“…This line of development is widely researched last years (see, for example, [8,52,55,[64][65][66][67][68][69][70][71][72]). …”

Section: Super-light Mirrorsmentioning

confidence: 99%

Study Of Pre-Shaped Membrane Mirrors And Electrostatic Mirrors With Nonlinear-Optical Correction

Dimakov¹,

Emel'yanov²

2002

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Public reporting burden for this collection of information is estimated to average 1 hour per response, including the time for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing the collection of information. Send comments regarding this burden estimate or any other aspect of this collection of information, including suggestions for reducing this burden to Washington Headquarters Services, Directorate for Information Operations and Reports, 1215 Jefferson Davis Highway, Suite 1204, Arlington, VA 22202-4302, and to the Office of Management and Budget,, Washington, DC 20503. AGENCY USE ONLY (Leave blank)2. REPORT DATE This report results from a contract tasking Research Institute for Laser Physics as follows: The aim of this work is to improve low-weight membrane mirror characteristics intended for relaying laser communication beams in space. Such systems would use a non-linear-optical corrector to correct surface figure and other optical aberrations. The analytical part of this project is aimed at estimating the feasibility of designing the mirrors based on the pre-shaped membranes. This evaluation will give a clear understanding of the approaches to forming super-light mirrors as well as of the problems anticipated in creating this new generation of space mirrors. In the course of the experimental work, a low-weight mirror model based on the pre-shaped membrane will be fabricated, and its optical characteristics will be studied. It is expected that the characteristics predicted theoretically will be observed experimentally. The first quarterly report on project 2103p (ISTC 00-7032), entitled "Study of pre-shaped membrane mirrors and electrostatic mirrors with nonlinear-optical correction." Large telescopes and super light mirrors OverviewNowadays a number of scientific and practical fields of activity need solutions of the problems requiring high-resolution of both ground and space based telescopes with substantial space penetrating power, namely ones with large aperture mirrors.First of all, these high-resolution physical instruments are required for astronomic observations. For example, the National Research Council of the National Academy of Sciences of the USA states the strategic tasks of astronomic observations as follows: "We must use the universe as a laboratory -a unique laboratory -for probing the laws of physics in regimes not accessible on Earth, such as the very early universe or near the event horizon of a black hole." "We must search for life beyond the Earth and, if it is found, determine its nature and its distribution. And finally, we must develop a conceptual framework that accounts for all that we have observed," the report says [1]. Note that at present the requirements to a telescope for some tasks [2] are the resolution of the order of 10 -3 arcsec and space penetrating power of stars of the 35th-38th magnitude. This means that a primary mirror must be of the order of 100m in diameter.Obviously, high-resolution...

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<title>Real-time holographic compensation of large optics for space deployment</title>

Cited by 4 publications

References 4 publications

Near-diffraction-limited compensated imaging and laser wavefront control with programmable diffractive optics

Near-diffraction-limited compensated imaging and laser wavefront control with programmable diffractive optics

Programmable diffractive optics for high-fidelity wavefront control

Study Of Pre-Shaped Membrane Mirrors And Electrostatic Mirrors With Nonlinear-Optical Correction

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