Results 41 to 50 of about 15,556 (304)
Micromachines, 2023 An active optical system with three segmented mirrors was proposed to verify the co-focus and co-phase progress. In this system, a kind of large-stroke and high-precision parallel positioning platform was specially developed to help support the mirrors ...
Zihao Yin +6 more
doaj +1 more source
Wavefront Control Strategies for Large Active Thin Shell Primaries with Unimorph Actuators
Actuators, 2023 This paper presents various aspects of the wavefront control strategies for an ultra-lightweight composite reflector made of polymers for the large primary of a space telescope, and the shape control is made by a set of patterned unimorph strain ...
Kainan Wang, Yian Yu, André Preumont
doaj +1 more source
Wind-induced deformations in a segmented mirror [PDF]
Applied Optics, 2002 A Zernike expansion of wind-induced deformations in a segmented mirror is described. The wind model is a frozen turbulent field with a Kolmogorov spectrum for scales smaller than the outer scale and a flat spectrum for scales larger than the outer scale.
openaire +2 more sources
Segmented bimorph mirror for adaptive otics: morphing strategy [PDF]
, 2014 This paper discusses the concept of a light weight segmented bimorph mirror for adaptive optics. It focuses on the morphing strategy and addresses the ill-conditioning of the Jacobian of the segments, which are partly outside the optical pupil.
Preumont, André +4 more
core +1 more source
Co-Phase Error Detection for Segmented Mirrors Based on Far-Field Information and Transfer Learning
PhotonicsThe resolution of a telescope is closely related to its aperture size; however, the aperture of a single primary mirror telescope cannot be indefinitely enlarged due to design and manufacturing constraints.
Kunkun Cheng +3 more
doaj +1 more source
Reciprocal control of viral infection and phosphoinositide dynamics
FEBS Letters, EarlyView.Phosphoinositides, although scarce, regulate key cellular processes, including membrane dynamics and signaling. Viruses exploit these lipids to support their entry, replication, assembly, and egress. The central role of phosphoinositides in infection highlights phosphoinositide metabolism as a promising antiviral target.
Marie Déborah Bancilhon, Bruno Mesmin
wiley +1 more source
Deformable mirror fitting error by correcting the segmented wavefronts [PDF]
, 2010 The ob jective of the present study is to estimate the ability of conventional adaptive optics (AO) to correct for a wavefront created by static errors randomly distributed over the population of a multi-segmented primary mirror for an ...
N. Yaitskova
core +1 more source
Reconstructing enzyme evolution by protein engineering
FEBS Letters, EarlyView.Natural enzyme evolution can be retraced by protein engineering methods such as directed evolution, rational design, and ancestral sequence reconstruction. These approaches reveal how enzymes emerged from ligand‐binding scaffolds, developed varying substrate preferences, formed oligomeric complexes, adapted to environmental changes, and evolved novel ...
Lukas Drexler +2 more
wiley +1 more source
Fine alignment of a large segmented mirror [PDF]
, 2010 A system for aligning a segmented mirror includes a source of radiation directed along a first axis to the segmented mirror and a beamsplitter removably inserted along the first axis for redirecting radiation from the first axis to a second axis ...
Dey, Thomas William
core +1 more source
Ultracompact Silicon Waveguide Bends Designed Using a Particle Swarm Optimization Algorithm
IEEE Photonics Journal, 2021 In this study, the trajectory of a 90° bend is divided into two symmetric halves that are mirror images of each other as referenced to the symmetry axis at 45°, and each half is segmented into small curved sections.
Po-Han Fu, Chen-Yu Chao, Ding-Wei Huang
doaj +1 more source