Results 11 to 20 of about 4,473,381 (352)
Active Optics in Modern, Large Optical Telescopes [PDF]
arXiv, 2001 Active optics is defined as the control of the shape and the alignment of the components of an optical system at low temporal frequencies. For modern large telescopes with flexible monolithic or segmented primary mirrors and also flexible structures this technique is indispensable to reach a performance which is either diffraction limited for an ...
L. Noethe
arxiv +3 more sources
LSST active optics system software architecture [PDF]
Astronomical Telescopes + Instrumentation, 2016 The Large Synoptic Survey Telescope (LSST) is an 8-meter class wide-field telescope now under construction on Cerro Pachon, near La Serena, Chile. This ground-based telescope is designed to conduct a decade-long time domain survey of the optical sky.
Sandrine Thomas +7 more
openalex +2 more sources
Active optics with a minimum number of actuators
, 2014 Optics for astronomy implies powerful developments of active and adaptive optics methods applied to instrumentation from X-rays to the near infrared for the design of telescopes, spectrographs, and coronagraph planet finders.
Gérard R. Lemaı̂tre
openalex +3 more sources
Frontiers in Public Health, 2022 This study aimed at implementing practice to build a standardized protocol to test the performance of computer-aided detection (CAD) algorithms for pulmonary nodules.
Hao Wang +5 more
doaj +1 more source
Coarse Phasing Detection Using Multiwavelength Wavefront
Photonics, 2023 Presently, the segmented mirror is the mainstream development direction of large-aperture telescopes. The key problem affecting the performance of segmented mirror telescopes concerns the co-phase of the segments. The segments’ co-phase includes the fine
Rongjie Qin, Zihao Yin, Yinnian Liu
doaj +1 more source
Electronic‐photonic board as an integration platform for Tb/s multi‐chip optical communication
IET Optoelectronics, 2021 Chip‐on‐board silicon photonics O‐band wavelength‐division multiplexing transceivers have been developed that will eventually enable high‐throughput on‐board optical communication for multi‐socket on‐board communication.
Tobias Lamprecht +7 more
doaj +1 more source
Applied Sciences, 2022 Studying how to use the coupling characteristics of net aberration fields induced by different perturbation parameters to realize the wave aberration compensation correction of perturbed telescopes is of great significance for the development of active ...
Jinxin Wang +4 more
doaj +1 more source
Anamorphic zoom system based on liquid crystal displays [PDF]
Journal of the European Optical Society-Rapid Publications, 2009 In this work we present an anamorphic zoom system, based on liquid crystal displays, which allows changing the magnification and distortion of an image very quickly, without mechanical parts and keeping the output plane stationary.
Iemmi Claudio, Campos Juan
doaj +1 more source
Active Optics—Progress in Modeling of Tulip-like Variable Curvature Mirrors
Optics, 2023 We present new results obtained from the modeling of a tulip-like variable curvature mirror (VCM) in the case of a central force that reacts to its contour.
Gerard R. Lemaitre +2 more
doaj +1 more source
Metal-Organic Hybrid Metamaterials for Spectral-Band Selective Active Terahertz Modulators
Applied Sciences, 2021 Optically controlled spectral-band selective terahertz (THz) modulators based on metal-organic hybrid metamaterials were investigated. An artificially structured material, which consists of two single split-ring resonators put together on the split gap ...
Hyung Keun Yoo +6 more
doaj +1 more source