Results 1 to 10 of about 345,237 (255)

Piston Error Measurement for Segmented Telescopes with an Artificial Neural Network

Sensors, 2021
A piston error detection method is proposed based on the broadband intensity distribution on the image plane using a back-propagation (BP) artificial neural network.
Dan Yue, Yihao He, Yushuang Li
semanticscholar   +3 more sources

Prism matching for piston segmentation correction with adaptive optics systems on extremely large telescopes

Image and Vision Computing New Zealand, 2021
Images observed at ground-based telescopes are blurred by Earth’s atmosphere. Adaptive optics systems can correct for this blurring by using a wavefront sensor to measure the instantaneous wavefront aberration created by the atmosphere, and a deformable ...
Richard Clare, Byron Engler, Stephen J. Weddell, Miska Le Louarn, Christophe Vérinaud   +4 more
openalex   +2 more sources

Improving the performance of multifocal diffractive lens designs by adding a peripheral piston [PDF]

Biomed Opt Express
Peripheral piston modulation in diffractive multifocal lenses suggests potential improvements in distance vision quality. Five lens designs—bifocal (BF), bifocal with piston (BFP), trifocal (TF), trifocal with piston (TFP), and a commercial refractive ...
Sabyasachi Goswami, Tianlun Zou, Sara Aissati, Gustavo A. Gandara-Montano, Len Zheleznyak, Susana Marcos   +5 more
semanticscholar   +2 more sources

Mode-Voltage Constrained Control for Adaptive Optics System

IEEE Photonics Journal
In the adaptive optics system of astronomical observation, the deformable mirror and the tip/tilt mirror are coupled during the correction process.
Ruitao Wang, Youming Guo, Nanfei Yan, Ying Yang, Lanqiang Zhang, Qiong Tu, Lingxiao Li, C. Rao   +7 more
semanticscholar   +3 more sources

A universal framework for microscope sensorless adaptive optics: Generalized aberration representations

APL Photonics, 2020
Adaptive optics (AO) methods are widely used in microscopes to improve image quality through correction of phase aberrations. A range of wavefront-sensorless AO schemes exist, such as modal, pupil segmentation zonal, and pixelated piston-based methods ...
Qi Hu, Jingyu Wang, J. Antonello, M. Hailstone, M. Wincott, Raphaël Turcotte, D. Gala, M. Booth   +7 more
semanticscholar   +2 more sources

A piston and tilt wavefront sensor dedicated to the cophasing of segmented optics in low light level conditions

Optics and lasers in engineering
Thomas Rousseaux, Jérôme Primot, Julien Jaeck, Bastien Rouzé, Cécile Le Gall, Cindy Bellanger   +5 more
openalex   +2 more sources

The LBTI Fizeau imager – II. Sensitivity of the PSF and the MTF to adaptive optics errors and to piston errors

, 2017
Fabien Patru, Simone Esposito, Alfio Puglisi, Armando Riccardi, Enrico Pinna, Carmelo Arcidiacono, J. Antichi, Bertrand Mennesson, Denis Defrère, Philip M. Hinz, John M. Hill   +10 more
openalex   +3 more sources

Piston control with adaptive optics in stellar interferometry [PDF]

, 2001
C. Vérinaud, F. Cassaing
openalex   +2 more sources

On-sky Reconstruction of Keck Primary Mirror Piston Offsets Using a Zernike Wavefront Sensor [PDF]

Astrophysical Journal, 2022
The next generation of large ground- and space-based optical telescopes will have segmented primary mirrors. Co-phasing the segments requires a sensitive wavefront sensor capable of measuring phase discontinuities.
M. V. van Kooten, S. Ragland, R. Jensen-Clem, Yinzi Xin, J. Delorme, J. Kent Wallace   +5 more
semanticscholar   +1 more source

Optical Enhancement of Diffraction Efficiency of Texas Instruments Phase Light Modulator for Beam Steering in Near Infrared

Micromachines, 2022
Phase light modulator (PLM) by MEMS mirror array operating in a piston-mode motion enables a high-speed diffractive beam steering in a random-access and flexible manner that makes a lidar system more intelligent and adaptive.
Jiafan Guan, Zhipeng Dong, Xianyue Deng, Yuzuru Takashima   +3 more
doaj   +1 more source