Results 81 to 90 of about 28,711 (337)

INGOT Wavefront Sensor: from the optical design to a preliminary laboratory test [PDF]

, 2021
Simone Di Filippo, Davide Greggio, Maria Bergomi, Kalyan Radhakrishnan, Elisa Portaluri, Valentina Viotto, Carmelo Arcidiacono, Demetrio Magrin, Luca Marafatto, Marco Dima, Roberto Ragazzoni, Pierre Janin-Portiron, Lauren Schatz, Benoît Neichel, Olivier Fauvarque, Thierry Fusco   +15 more
openalex   +1 more source

Phase Topology Stability of an Optical Vortex via an Electrically Controlled Twist‐Planar Oriented Liquid Crystal Fresnel Lens

Advanced Optical Materials, EarlyView.
A simple and efficient method for determining the stability of optical vortices via Fourier transform using a conventional spherical lens is presented. The theoretical and experimental results demonstrate a practical approach to directly and unambiguously measure the magnitude and sign of the topological charge of a beam without altering an ...
Elena Melnikova, Katsiaryna Pantsialeyeva, Dmitry Gorbach, Alexei Tolstik, Sergei Slussarenko Jr., Alina Karabchevsky   +5 more
wiley   +1 more source

Quasi-static aberrations induced by laser guide stars in adaptive optics [PDF]

, 2006
Laser Guide Star Adaptive Optics (LGS AO) systems use the return from an artificial guide star to measure the wavefront aberrations in the direction of the science object.
Bouchez, Antonin H., Le Mignant, David, van Dam, Marcos A., Wizinowich, Peter L.   +3 more
core   +1 more source

3D Microprinting of Structures with Lanthanide‐Based Fluorophores on Optical Fibers for Multiplexed Sensing

Advanced Optical Materials, EarlyView.
Incorporating lanthanide‐based fluorophores into commercial resists for femtosecond direct laser writing enables a novel platform for multiplexed sensing. Porous, periodic, and solid luminescent microstructures fabricated directly on optical fiber tips are presented.
Valese Aslani, Shaghayegh Baghapour, Stephen C. Warren‐Smith, Wenqi Zhang, Esmat Ebadati, Sally E. Plush, Alois M. Herkommer, Andrea Toulouse, Shahraam Afshar V.   +8 more
wiley   +1 more source

Pyramid Wavefront Sensor Using a Discrete Modulated Operation Method

IEEE Photonics Journal
The adaptive optics system (AOS) incorporating a modulated pyramid wavefront sensor (PWFS) represents a key area of exploration in current research aimed at enhancing the capabilities of future extremely large astronomical telescopes.
Lu Chen, Kainan Yao, Jianli Wang, Dianbing Chen, Mingda Ge, Zhiqiang Xu, Dongbo Che   +6 more
doaj   +1 more source

On-sky reconstruction of Keck Primary Mirror Piston Offsets using a\n Zernike Wavefront Sensor [PDF]

, 2022
Maaike van Kooten, Sam Ragland, Rebecca Jensen-Clem, Yinzi Xin, Jacques-Robert Delorme, J. Kent Wallace   +5 more
openalex   +1 more source

On-sky demonstration of low-order wavefront sensing and control with focal plane phase mask coronagraphs [PDF]

, 2015
The ability to characterize exoplanets by spectroscopy of their atmospheres requires direct imaging techniques to isolate planet signal from the bright stellar glare.
Baudoz, Pierre, Guyon, Olivier, Jovanovic, Nemanja, Kudo, Tomoyuki, Kuhn, Jonas, Lozi, Julien, Martinache, Frantz, Serabyn, Eugene, Singh, Garima   +8 more
core   +4 more sources

Metalens Array for Complex‐Valued Optical Discrete Fourier Transform

Advanced Optical Materials, EarlyView.
A single‐layer metalens‐array device performs complex‐to‐complex discrete Fourier transforms (DFTs) optically with O(N) digital time complexity. Integrated interferometric phase retrieval and error mitigation scheme enables accurate, compact, and low‐power optical computing. The approach provides a versatile framework for implementing arbitrary complex‐
Randy Stefan Tanuwijaya, Lap So, Wai Chun Wong, Tailin An, Jingdi Zhang, Wing Yim Tam, Jensen Li   +6 more
wiley   +1 more source

Object wave reconstruction by speckle illumination and phase retrieval [PDF]

Journal of the European Optical Society-Rapid Publications, 2009
An innovative setup for the speckle-based phase retrieval method is proposed. In the conventional setup, a plane wave illuminates the test object and the transmitted wavefront is incident on a diffuser aperture generating a speckle field.
Almoro P. F., Hanson S. G.
doaj   +1 more source

Generalised optical differentiation wavefront sensor: a sensitive high dynamic range wavefront sensor

Optics Express, 2016
Current wavefront sensors for high resolution imaging have either a large dynamic range or a high sensitivity. A new kind of wavefront sensor is developed which can have both: the Generalised Optical Differentiation wavefront sensor. This new wavefront sensor is based on the principles of optical differentiation by amplitude filters.
openaire   +3 more sources