Zobrazeno 1 - 10
of 29
pro vyhledávání: '"Terry J. Brennan"'
Publikováno v:
Optical Engineering. 61
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0f5682038abae29837482fbc45431575
https://doi.org/10.1117/1.oe.61.4.044104
https://doi.org/10.1117/1.oe.61.4.044104
Publikováno v:
OSA Imaging and Applied Optics Congress 2021 (3D, COSI, DH, ISA, pcAOP).
This paper compares the closed-loop, adaptive-optics-system performance obtained with a Shack-Hartmann wavefront sensor (WFS) to that of a fixed-pyramid WFS, assuming a point-source beacon. To quantify performance, the analysis uses wave-optics simul
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4ef032510a166dd3de124ec0f3e41f92
https://doi.org/10.1364/pcaop.2021.pf1c.4
https://doi.org/10.1364/pcaop.2021.pf1c.4
Publikováno v:
Unconventional and Indirect Imaging, Image Reconstruction, and Wavefront Sensing 2018.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f6856df126d400eb1e39cf07a29d83b9
https://doi.org/10.1117/12.2319871
https://doi.org/10.1117/12.2319871
Publikováno v:
Unconventional and Indirect Imaging, Image Reconstruction, and Wavefront Sensing 2018.
In this study we use a series of computational-wave-optics experiments to look at the statistics associated with speckle fields resulting from a tilted flat plate (i.e. one that is optically rough compared to the wavelength of plane-wave illumination
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9b35d59fc4da3d32d64411b041380153
https://doi.org/10.1117/12.2319868
https://doi.org/10.1117/12.2319868
Publikováno v:
Unconventional and Indirect Imaging, Image Reconstruction, and Wavefront Sensing 2018.
Adaptive-optics (AO) systems correct the distortions caused by atmospheric turbulence for imaging and laser transmission applications. Given an extended, uncooperative object, the AO system must create a reference wave for wavefront measurement. It d
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::44cfb87332c4d3f01d6f55f6eaf240de
https://doi.org/10.1117/12.2318954
https://doi.org/10.1117/12.2318954
Publikováno v:
Unconventional and Indirect Imaging, Image Reconstruction, and Wavefront Sensing 2017.
This study evaluates the effects of beacon-wavelength mismatch on phase-compensation performance. In general, beacon-wavelength mismatch occurs at the system level because the beacon-illuminator laser (BIL) and high-energy laser (HEL) are often at di
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::43711ad3a1cd3ad9b800b96a59c59150
https://doi.org/10.1117/12.2270495
https://doi.org/10.1117/12.2270495
Publikováno v:
Laser Communication and Propagation through the Atmosphere and Oceans VI.
Theory presented in the companion paper [1] reveals that for paraxial propagation of scalar waves transverse linear momentum (TLM) and orbital angular momentum (OAM) of beam waves are simply related to the wave coherence function, and that the TLM an
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::257fb1abf4aa5cdab791f1a85309b9d1
https://doi.org/10.1117/12.2275703
https://doi.org/10.1117/12.2275703
Autor:
Mark F. Spencer, Terry J. Brennan
Publikováno v:
Micro- and Nanotechnology Sensors, Systems, and Applications IX.
The presence of distributed-volume atmospheric aberrations or “deep turbulence” presents unique challenges for beam-control applications which look to sense and correct for disturbances found along the laser-propagation path. This paper explores
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4b8237240506ac8653ad0cd6c5c01921
https://doi.org/10.1117/12.2258681
https://doi.org/10.1117/12.2258681
Autor:
Mark F. Spencer, Terry J. Brennan
Publikováno v:
Imaging and Applied Optics 2017 (3D, AIO, COSI, IS, MATH, pcAOP).
This paper simulates a nominal adaptive-optic system with the least squares principal value plus seven (LSPV+7) algorithm in a null-seeking control loop. The results show that upon correction using a continuous-face-sheet deformable mirror, there is
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9e492bf2b8417d0d84a8bb3f8996b294
https://doi.org/10.1364/pcaop.2017.pth2d.2
https://doi.org/10.1364/pcaop.2017.pth2d.2
Publikováno v:
Optics express. 23(20)
The Fresnel diffraction integral form of optical wave propagation and the more general Linear Canonical Transforms (LCT) are cast into a matrix transformation form. Taking advantage of recent efficient matrix multiply algorithms, this approach promis
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d7a1da6fdc7b70141ec19a0043ce184d
https://pubmed.ncbi.nlm.nih.gov/26480196
https://pubmed.ncbi.nlm.nih.gov/26480196