Results 61 to 70 of about 712,952 (286)
Thermal Balance and Active Damping of a Piezoelectric Deformable Mirror for Adaptive Optics
Actuators, 2019 Piezoelectric unimorph deformable mirrors offer a cheap solution to adaptive optics, with mass production capability. However, standard solutions have significant drawbacks: (i) the static shape is sensitive to the temperature, and (ii) the low ...
Kainan Wang +2 more
doaj +1 more source
Tuning the Thermal Expansion Properties of Optical Reference Cavities with Fused Silica Mirrors [PDF]
JOSA B, Vol. 27, Issue 5, pp. 914-919 (2010), 2010 We investigate the thermal expansion of low thermal noise Fabry-Perot cavities made of Low Thermal Expansion (LTE) glass spacers and Fused Silica (FS) mirrors. The different thermal expansion of mirror and spacer deforms the mirror. This deformation strongly contributes to the cavity's effective Coefficient of Thermal Expansion (CTE), decreasing the ...
arxiv +1 more source
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 +1 more source
Photonics, 2022 Conventional phase measuring deflectometry (PMD) takes up a large measurement space and is not suitable for compact online measurement, as the liquid crystal display (LCD) has to be placed in parallel with the mirror under test.
Yongchen Zhuang +5 more
doaj +1 more source
Magnetic liquid deformable mirrors for astronomical applications:Active correction of optical aberrations from lower-grade optics and support system [PDF]
, 2012 Deformable mirrors are increasingly used in astronomy. However, they still are limited in stroke for active correction of high amplitude optical aberrations. Magnetic Liquid deformable mirrors (MLDMs) are a new technology that has advantages of high-amplitude deformations and low costs.
arxiv +1 more source
Optics Express, 2019 In this paper, an elastic mode method of deformable mirror is proposed to decompose arbitrary wave-front errors of adaptive optics system. The elastic modes are derived with an analytical method of linear piezoelectricity based on a bimorph piezoelectric
Hairen Wang +3 more
semanticscholar +1 more source
An Efficient Method for Wavefront Aberration Correction Based on the RUN Optimizer
Photonics, 2023 The correction of wavefront aberrations in wavefront sensorless (WFS-less) adaptive optical (AO) systems requires control algorithms that can ensure rapid convergence while maintaining effective correction capabilities.
Huizhen Yang +6 more
doaj +1 more source
Non-compact Mirror Bundles and (0,2) Liouville Theories [PDF]
JHEP 0903:062,2009, 2008 We study (0,2) deformations of N=2 Liouville field theory and its mirror duality. A gauged linear sigma model construction of the ultraviolet theory connects (0,2) deformations of Liouville field theory and (0,2) deformations of N=2 SL(2,R)/U(1) coset model as a mirror duality.
arxiv +1 more source
Phase control of a longitudinal momentum entangled photon state by a deformable membrane mirror
, 2009 We propose a paradigmatic demonstration of the potentialities of a deformable mirror for closed-loop control of a two-photon momentum-entangled state, subject to phase fluctuations.
Abouraddy +29 more
core +1 more source
Characterization of a Deformable Mirror for astronomical applications [PDF]
, 2023 openI will demonstrate the compensation of a perturbed wavefront through the utilization of a deformable mirror. This involves an exploration of the modal framework and the decomposition of a wavefront using Zernike polynomials.
FRISO, NICHOLAS
core