Optical Enhancement of Diffraction Efficiency of Texas Instruments Phase Light Modulator for Beam Steering in Near Infrared [PDF]
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 +3 more
doaj +2 more sources
Mode-Voltage Constrained Control for Adaptive Optics System
IEEE Photonics JournalIn the adaptive optics system of astronomical observation, the deformable mirror and the tip/tilt mirror are coupled during the correction process.
Ruitao Wang +7 more
doaj +2 more sources
Sensing and control of segmented mirrors with a pyramid wavefront sensor in the presence of spiders [PDF]
, 2018 The segmentation of the telescope pupil (by spiders & the segmented M4) create areas of phase isolated by the width of the spiders on the wavefront sensor (WFS), breaking the spatial continuity of the wavefront. The poor sensitivity of the Pyramid WFS (PWFS) to differential piston leads to badly seen and therefore uncontrollable differential pistons ...
Clarke, Fraser +11 more
arxiv +3 more sources
Improving the performance of multifocal diffractive lens designs by adding a peripheral piston [PDF]
Biomed Opt ExpressPeripheral 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 +5 more
semanticscholar +2 more sources
Optical setup for a piston-cylinder type pressure cell: a double-volume approach [PDF]
Phys. Rev. Applied 17, 024065 (2022), 2021 Measurement of the absolute value of the applied pressure in high-pressure muon and neutron experiments is a complicated task. It requires both the presence of a calibration material inside the sample volume as well as additional time for refining the response of the calibrant. Here we describe the use of optical calibrants for precise determination of
Naumov, Pavel +6 more
arxiv +3 more sources
Phase transitions of photon fluid flows driven by a virtual all-optical piston [PDF]
arXiv, 2020 The piston problem, i.e. the dynamics in a uniform gas at rest under the action of a moving piston is fundamental problem of physics and a canonical case study in shock wave physics. We investigate theoretically and experimentally the analogous problem for a photon fluid, which turns out to be strongly influenced by the dispersive character of the ...
Bendahmane, Abdelkrim +5 more
arxiv +3 more sources
Design and development of a 329-segment tip-tilt piston mirror array for space-based adaptive optics [PDF]
SPIE MOEMS-MEMS, 2006 Jason B. Stewart +5 more
openalex +2 more sources
Piston-Type Optical Modulator for Dynamic Thermal Radiation Tuning Applications [PDF]
Materials, 2021 This study introduces a movable piston-like structure that provides a simple and cost-effective avenue for dynamically tuning thermal radiation. This structure leverages two materials with dissimilar optical responses—graphite and aluminum—to modulate from a state of high reflectance to a state of high absorptance.
Andrew Caratenuto, Yi Zheng
openaire +2 more sources
In-Situ Metrology of Large Segmented Detector Based on Modified Optical Truss
IEEE Photonics Journal, 2023 To precisely map cosmic structures and capture time-domain events, future large survey telescopes will be equipped with segmented detectors that greatly expand their field of view. Segment flatness and assembly accuracy will be essential for them to make
Qichang An +6 more
doaj +1 more source