Zobrazeno 1 - 10
of 903
pro vyhledávání: '"Piston (optics)"'
Publikováno v:
Mathematical Problems in Engineering, Vol 2021 (2021)
This paper focuses on the directivity design of array structures of acoustic directional transducers. Based on Huygens principles, the directivity formula of transducer arrays under random distribution in xyz space is derived when the circular piston
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::60264419711332f4acef201228c19b6d
https://doi.org/10.1155/2021/6670277
https://doi.org/10.1155/2021/6670277
Autor:
Marcus Lingham, Josephine Munro, Nicholas Herrald, Luke Gers, Tony Travouillon, Antonin Bouchez
Publikováno v:
Experimental Astronomy. 50:289-302
The concept design for a laboratory based telescope emulator for the Giant Magellan Telescope (GMT) is described here. The Giant Magellan Telescope has a primary mirror comprised of 7 segments, and a secondary mirror with matching segmentation. The p
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::aaabcbe27c6aff0e9cea2d0cad407561
https://doi.org/10.1007/s10686-020-09674-9
https://doi.org/10.1007/s10686-020-09674-9
Publikováno v:
Measurement Techniques. 62:989-995
The special features of the implementation and the main sources of measurement uncertainty of the power of an ultrasound beam in water are examined by the method of plane scanning of the cross-section of a beam. The methods of evaluating the effect o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::75af6f8e92f4a1ca2a7985e3ba0c492a
https://doi.org/10.1007/s11018-020-01722-2
https://doi.org/10.1007/s11018-020-01722-2
Publikováno v:
IEEE Access, Vol 8, Pp 111585-111597 (2020)
In the co-phasing techniques applied to the segmented telescope, a Shack-Hartmann wavefront sensor cannot accurately detect the piston error of the segment. Although the phase diversity (PD) algorithm can detect the piston error of each segment, it f
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::64959ac2c4541b1ad3ae64c1b3b1ac8d
https://ieeexplore.ieee.org/document/9118937/
https://ieeexplore.ieee.org/document/9118937/
Autor:
Zhang Chunyue, Shuyan Xu, An Qichang, Yirui Wang, Shuaihui Wang, Fengyi Jiang, Boqian Xu, Guohao Ju
Publikováno v:
Optics express. 29(16)
Segmented primary mirror provides many crucial important advantages for the construction of extra-large space telescopes. The imaging quality of this class of telescope is susceptible to phasing error between primary mirror segments. Deep learning ha
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::74a31ce69545e3fffdbbd26a2d296844
https://pubmed.ncbi.nlm.nih.gov/34614912
https://pubmed.ncbi.nlm.nih.gov/34614912
Publikováno v:
Technologies for Optical Countermeasures XVIII and High-Power Lasers: Technology and Systems, Platforms, Effects V.
Coherently Beam Combining System is sensitive to occurring in near-field disturbances: tilts, phase, amplitude, depolarization, defocusing and wavefront aberration. The analytical/numerical model for such purposes was developed. The tilts impact is d
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ffb50a1cf72b3ac6195d0d6d251dd086
https://doi.org/10.1117/12.2600083
https://doi.org/10.1117/12.2600083
Publikováno v:
ODS 2021: Industrial Optical Devices and Systems.
A concept of Texas Instrument (TI)-Phase-only Spatial Light Modulator (PLM) is reported which utilizing the dynamic piston motion of PLM pixels to form a discretized blazed grating. By fully manipulating the piston motion of pixels and increasing the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f9e22059a13c197c724f777eb57832c7
https://doi.org/10.1117/12.2596485
https://doi.org/10.1117/12.2596485
Autor:
Matthew R. Kemnetz, Stanislav Gordeyev
Publikováno v:
Unconventional Imaging and Adaptive Optics 2021.
In the typical analysis of aero-optical wavefront data, the three lowest order spatial modes are removed from the experimental data. These three spatial modes (tip, tilt, and piston) are commonly corrupted by mechanical disturbances. In this work an
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::259b7c9726b58d69d9b048b7e1dcb68d
https://doi.org/10.1117/12.2594754
https://doi.org/10.1117/12.2594754
Publikováno v:
Techniques and Instrumentation for Detection of Exoplanets X.
The phase-apodized-pupil Lyot coronagraph (PAPLC) is a pairing of the apodized-pupil Lyot coronagraph (APLC) and the apodizing phase plate (APP) coronagraph that yields (in numerical simulations) inner working angles as close as 1.4 lambda/D at contr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7dadf073e923d5e31e577c65d5b30381
https://doi.org/10.1117/12.2594952
https://doi.org/10.1117/12.2594952
Autor:
Scott D. Will, James Noss, Kelsey Glazer, Jaret Prothro, Iva Laginja, Gregory R. Brady, Hari B. Subedi, Peter Petrone, Raphaël Pourcelot, Evelyn McChesney, Laurent Mugnier, Sam Weinstock, Marshall D. Perrin, Heather Olszewski, Ron Shiri, Susan M. Redmond, John G. Hagopian, Matthew Maclay, Bryony Nickson, Leonid Pogorelyuk, Lucie Leboulleux, Meiji Nguyen, Yinzi Xin, Emiel H. Por, Rémi Soummer, Ananya Sahoo, Mamadou N'Diaye, Anand Sivaramakrishnan, Julia Fowler, Nathan Scott, Maggie Kautz, Rebecca Zhang, Laurent Pueyo, Théo Jolivet, Rob Gontrum, Keira Brooks, Jean-François Sauvage, Thomas Comeau
Publikováno v:
Techniques and Instrumentation for Detection of Exoplanets X.
We present recent laboratory results demonstrating high-contrast coronagraphy for future space-based large segmented telescopes such as the Large UV, Optical, IR telescope (LUVOIR) mission concept studied by NASA. The High-contrast Imager for Complex
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4cf85f4bcb176ef8931c3439e09241ef
https://doi.org/10.1117/12.2594684
https://doi.org/10.1117/12.2594684