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Analysis of TMT Primary Mirror Control-Structure Interaction
Extremely Large Telescopes Control Systems Control-Structure-Interaction
2015/5/12
The primary mirror (M1) of the Thirty Meter Telescope (TMT) is composed of 492 hexagonal segments of
circumscribed diameter 1.43m, as shown in Figure 1. The out-of-plane degrees of freedom are contro...
Advances in Edge Sensors for the Thirty Meter Telescope Primary Mirror
Extremely Large Telescopes edge sensors segmented mirrors
2015/5/12
The primary mirror segments are passively constrained in the three lateral degrees of freedom. We evaluate the segment
lateral motions due to the changing gravity vector and temperature, using site ...
Design of a Prototype Primary Mirror Segment Positioning Actuator for the Thirty Meter Telescope
TMT actuator control system
2015/5/12
In order for the Thirty Meter Telescope (TMT) to achieve the required optical performance, each of its 738 primary
mirror segments must be positioned relative to adjacent segments with nanometer-lev...
Performance Prediction of the TMT Tertiary Mirror Support System
Tertiary mirror mirror performances mirror support optimizations
2015/5/12
The Ritchey-Chrétien (RC) optical design of Thirty Meter Telescope (TMT) calls for a 3.1m diameter secondary mirror
(M2M) and an elliptical tertiary mirror (M3M) of 3.5m along its major axis and 2.5...
Development of the Primary Mirror Segment Support Assemblies for the Thirty Meter Telescope
TMT segment mirror support
2015/5/12
This paper describes the studies performed to establish a baseline conceptual design of the Segment Support Assembly (SSA) for the Thirty Meter Telescope (TMT) primary mirror. The SSA uses a combinat...
Primary Mirror Segmentation Studies for the Thirty Meter Telescope
mirror segment segmentation
2015/5/12
The Thirty Meter Telescope (TMT) project, a partnership between ACURA, Caltech, and the University of California, is
currently developing a 30-meter diameter optical telescope. The primary mirror wi...
Advancement of the Segment Support System for the Thirty Meter Telescope Primary Mirror
telescope mirror segment
2015/5/12
This paper presents refinements to the design of the TMT primary mirror segment passive-support system that are
effective in reducing gravity print-through and thermal distortion effects. First, a no...
Researchers Invent ‘Meta Mirror’ to Help Advance Nonlinear Optical Systems
Laser Nonlinear mirror Chemical Optical The mirror
2014/7/18
AUSTIN, Texas — Researchers at the Cockrell School of Engineering at The University of Texas at Austin have created a new nonlinear metasurface, or meta mirror, that could one day enable the miniaturi...
Deducing radiation pressure on a submerged mirror from the Doppler shift
submerged mirror the Doppler shift Optics
2012/5/29
Radiation pressure on a flat mirror submerged in a transparent liquid, depends not only on the refractive index n of the liquid, but also on the phase angle psi_0 of the Fresnel reflection coefficient...
Robust design of Si/Si3N4 high contrast grating mirror for mid-infrared VCSEL application
High contrast grating mirror mid-infrared VCSEL Robust design
2012/5/28
A Si/Si3N4 high contrast grating mirror has been designed for a VCSEL integration in mid-infrared ({\lambda} = 2.65 $\mu$m). The use of an optimization algorithm which maximizes a VCSEL mirror quality...
Analogy of the grounded conducting sphere image problem with mirror optics
Analogy sphere image problem mirror optics
2011/8/5
Abstract: We show that in the grounded conducting sphere image problem, all the necessary information about the image charge can be found from a mirror equation and a magnification formula. Then, we p...
Calabi-Yau Manifolds, Hermitian Yang-Mills Instantons and Mirror Symmetry
Calabi-Yau manifold Hermitian Yang-Mills instanton Mirror symmetry
2011/9/30
Abstract: We formulate six-dimensional Euclidean gravity as SU(4)=SO(6) Yang-Mills gauge theory. For that purpose we devise a six-dimensional version of the 't Hooft symbols which realizes the isomorp...
Nonlinear Mirror Modes in Space Plasmas
mirror modes, temperature anisotropies, plasma microinstabilities, space plasmas
2011/9/7
Since the first observations by Kaufmann et al. (1970), special attention has been paid to static pressure-balanced structures in the form of magnetic holes or humps observed in regions of the solar w...
Open mirror symmetry for Pfaffian Calabi-Yau 3-folds
mirror symmetry Pfaffian Calabi-Yau 3-folds
2010/12/23
We investigate the open mirror symmetry of certain non-complete intersection Calabi- Yau 3-folds, so called pfaffian Calabi-Yau. We perform the prediction of the number of disk invariants of several ...
When combined with mirror symmetry, the A-model approach to quantization leads to a fairly simple and tractable problem. The most interesting part of the problem then becomes finding the mirror of the...