Zobrazeno 1 - 10
of 22
pro vyhledávání: '"Sven Verpoort"'
Autor:
Sven Verpoort, Andreas Grzesik, Pascal Hallibert, Maximilian Gerhards, Ulrich Wittrock, Maximilian Freudling, Markus Erhard, Sinje Leitz
Publikováno v:
International Conference on Space Optics — ICSO 2020.
This paper presents the results of the technology development project “Enabling Technologies for Piezo-Based Deformable Mirrors in Active Optics Correction Chains” conducted by OHB System AG together with its partner Munster University of Applied
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::416aec21a4d83000a79907edebb9df0d
https://doi.org/10.1117/12.2599467
https://doi.org/10.1117/12.2599467
Publikováno v:
Journal of the Optical Society of America. A, Optics, image science, and vision. 36(8)
Image-sharpness metrics can be used to optimize optical systems and to control wavefront sensorless adaptive optics systems. We show that for an aberrated system, the numerical value of an image-sharpness metric can be improved by adding specific abe
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c302bb682a5ebf7782d85b41cf513f00
https://pubmed.ncbi.nlm.nih.gov/31503569
https://pubmed.ncbi.nlm.nih.gov/31503569
Publikováno v:
International Conference on Space Optics — ICSO 2018.
With a view to future large space telescopes, we investigate image-based wavefront correction with active optics. We use an image-sharpness metric as merit function to evaluate the image quality, and the Zernike modes as control variables. In severel
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::be522f792171a161b821c13ae3183b4e
https://doi.org/10.1117/12.2536206
https://doi.org/10.1117/12.2536206
Publikováno v:
Applied Optics. 59:6959
On-the-fly remote laser processing plays an increasingly important role in modern fabrication techniques. These processes require guiding of the focus of a laser beam along the contours of the workpiece in three dimensions. State-of-the-art galvanome
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b12982e615af02294c320771fbf07fbf
https://doi.org/10.1364/ao.397495
https://doi.org/10.1364/ao.397495
Publikováno v:
Applied Optics. 59:5625
We recently presented a novel unimorph deformable mirror which allows for dynamic focus shift with an actuation rate of 2 kHz. Such mirrors suffer from hysteresis and creep. Therefore, they have to be operated in closed-loop. For this purpose, we dev
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1d9b81c5fc77942ef58cee6144f9e9c4
https://doi.org/10.1364/ao.392970
https://doi.org/10.1364/ao.392970
Autor:
Sven Verpoort, Claus Schnitzler, Markus Zecherle, Andreas R. Brenner, Kersten Schuster, Benedikt Nohn, Martin Reisacher, Markus Kogel-Hollacher
Publikováno v:
Journal of Laser Applications. 32:012018
Laser surface structuring is becoming increasingly important in the industry for tool and mold making. While structured surfaces contribute to minimizing friction in combustion engines or to increasing efficiency of light-emitting diode-based lightin
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::823c0f4027f3568674f9ff170ed23a32
https://doi.org/10.2351/1.5132401
https://doi.org/10.2351/1.5132401
Publikováno v:
Optical Instrument Science, Technology, and Applications.
Active optics is an enabling technology for future large space telescopes. Image-based wavefront control uses an image-sharpness metric to evaluate the optical performance. A control algorithm iteratively adapts a corrective element to maximize this
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fe4ac51dcf311d3d7bb64e5e163b80ac
https://doi.org/10.1117/12.2312523
https://doi.org/10.1117/12.2312523
Autor:
Gleb Vdovin, Sven Verpoort, Michel Verhaegen, Orestis Kazasidis, Oleg Soloviev, Ulrich Wittrock
Publikováno v:
Optics Express, 26(21)
With a view to the next generation of large space telescopes, we investigate guide-starfree, image-based aberration correction using a unimorph deformable mirror in a plane conjugate to the primary mirror.We designed and built a high-resolution imagi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ac5e24c744104b40b20bbe5e8323a1ad
http://resolver.tudelft.nl/uuid:45660959-10b5-471c-a281-a8ceed4a284f
http://resolver.tudelft.nl/uuid:45660959-10b5-471c-a281-a8ceed4a284f
Publikováno v:
International Conference on Space Optics — ICSO 2014.
Concepts for future large space telescopes require an active optics system to mitigate aberrations caused by thermal deformation and gravitational release. Such a system would allow on-site correction of wave-front errors and ease the requirements fo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e8c26035e61feece6b617de89565099b
https://doi.org/10.1117/12.2304178
https://doi.org/10.1117/12.2304178
Publikováno v:
SPIE Proceedings.
We have developed, manufactured and tested a unimorph deformable mirror for space applications based on piezoelectric actuation. The mirror was designed for the correction of low-order Zernike modes with a stroke of several tens of micrometers over a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c4cfa34c88d6c260d3a7ac2841d528a6
https://doi.org/10.1117/12.2232548
https://doi.org/10.1117/12.2232548