Flat-stitching error analysis of large-aperture photon sieves

2013 ◽  
Vol 53 (1) ◽  
pp. 90 ◽  
Author(s):  
Guang Jin ◽  
Junliang Yan ◽  
Hua Liu ◽  
Xing Zhong ◽  
Yong Yan
Keyword(s):  
Error Analysis ◽  
Large Aperture ◽  
Photon Sieves

scholarly journals Sensitivity of large-aperture scintillometer measurements of area-average heat fluxes to uncertainties in topographic heights

2014 ◽  
Vol 7 (1) ◽  
pp. 33-68
Author(s):  
M. A. Gruber ◽  
G. J. Fochesatto ◽  
O. K. Hartogensis
Keyword(s):  
Error Analysis ◽  
Sensitivity Function ◽  
Heat Fluxes ◽  
Index Structure ◽  
Real Field ◽  
Computational Error ◽  
One Dimensional ◽  
Coupled Equations ◽  
Large Aperture ◽  
Beam Height

Abstract. Scintillometer measurements allow for estimations of the refractive index structure parameter Cn2 over large areas in the atmospheric surface layer. Turbulent fluxes of heat and momentum are inferred through coupled sets of equations derived from the Monin–Obukhov similarity hypothesis. One-dimensional sensitivity functions have been produced that relate the sensitivity of heat fluxes to uncertainties in single values of beam height over homogeneous and flat terrain. However, real field sites include variable topography and heterogeneous surfaces. We develop here the first analysis of the sensitivity of scintillometer derived sensible heat fluxes to uncertainties in spatially distributed topographic measurements. For large-aperture scintillometers and independent friction velocity u* measurements, sensitivity is shown to be concentrated in areas near the center of the beam path and where the underlying topography is closest to the beam height. Uncertainty may be greatly reduced by focusing precise topographic measurements in these areas. A new two-dimensional variable terrain sensitivity function is developed for quantitative error analysis. This function is compared with the previous one-dimensional sensitivity function for the same measurement strategy over flat and homogeneous terrain. Additionally, a new method of solution to the set of coupled equations is produced that eliminates computational error. The results are produced using a new methodology for error analysis involving distributed parameters that may be applied in other disciplines.

A method on error analysis for large-aperture optical telescope control system

2016 ◽  
Author(s):  
Yanrui Su ◽  
Qiang Wang ◽  
Fabao Yan ◽  
Xiang Liu ◽  
Yongmei Huang
Keyword(s):  
Control System ◽  
Error Analysis ◽  
Optical Telescope ◽  
Large Aperture

scholarly journals Testing the transmitted wavefront of large aperture long-focallength lens using a multizone computer-generated hologram

2019 ◽  
Vol 215 ◽  
pp. 04004
Author(s):  
Jian-Peng Cui ◽  
Ning Zhang ◽  
Jie Liu ◽  
Di-Long Wu ◽  
Hua Xu ◽  
...  
Keyword(s):  
Error Analysis ◽  
Focal Length ◽  
Spatial Filter ◽  
Main Zone ◽  
Large Aperture ◽  
Computer Generated Hologram ◽  
Focal Length Lens

A method for testing the transmitted wavefront of large aperture long-focal-length lens with a multizone computer-generated hologram (CGH) is proposed. The multizone CGH has 5 zones: one main zone for the null testing of long-focal-length lens and four auxiliary zones for the pre-alignment of measured lens. Both 1st order wavefront and 0th order wavefront of CGH are measured, and 0th order wavefront is used to calibrate the substrate error. To verify this test approach, a 450mm×450mm multizone CGH is designed and fabricated for testing the spatial filter lens. Experiments and error analysis are carried out. The results show that the desired precision can be reached with use of CGH.

Assembly Error Analysis for Large Aperture Transport Mirror in High Power Solid-State Laser System

2015 ◽  
Vol 35 (9) ◽  
pp. 0922004 ◽  
Author(s):  
王辉 Wang Hui ◽  
黎沁 Li Qin ◽  
熊召 Xiong Zhao ◽  
袁晓东 Yuan Xiaodong ◽  
姚超 Yao Chao ◽  
...  
Keyword(s):  
Solid State ◽  
Error Analysis ◽  
High Power ◽  
Laser System ◽  
Solid State Laser ◽  
State Laser ◽  
Large Aperture ◽  
Assembly Error

Large Aperture Membrane Diffractive Lens Deformation Error Analysis

2018 ◽  
Vol 47 (2) ◽  
pp. 205002
Author(s):  
李韬杰 LI Tao jie ◽  
吴鹏 WU Peng ◽  
杨正 YANG Zheng ◽  
尹韶云 YIN Shao yun ◽  
杜春雷 DU Chun lei ◽  
...  
Keyword(s):  
Error Analysis ◽  
Diffractive Lens ◽  
Large Aperture ◽  
Deformation Error

The O–C diagrams of minor planets − a new approach to modelling the rotation

1999 ◽  
Vol 173 ◽  
pp. 185-188
Author(s):  
Gy. Szabó ◽  
K. Sárneczky ◽  
L.L. Kiss
Keyword(s):  
Error Analysis ◽  
Time Dependence ◽  
Theoretical Work ◽  
Minor Planet ◽  
Minor Planets ◽  
New Approach ◽  
Preliminary Results ◽  
Ccd Observations

AbstractA widely used tool in studying quasi-monoperiodic processes is the O–C diagram. This paper deals with the application of this diagram in minor planet studies. The main difference between our approach and the classical O–C diagram is that we transform the epoch (=time) dependence into the geocentric longitude domain. We outline a rotation modelling using this modified O–C and illustrate the abilities with detailed error analysis. The primary assumption, that the monotonity and the shape of this diagram is (almost) independent of the geometry of the asteroids is discussed and tested. The monotonity enables an unambiguous distinction between the prograde and retrograde rotation, thus the four-fold (or in some cases the two-fold) ambiguities can be avoided. This turned out to be the main advantage of the O–C examination. As an extension to the theoretical work, we present some preliminary results on 1727 Mette based on new CCD observations.

Error Analysis in Neuropsychological Assessment of Verbal Memory and Learning

1995 ◽  
Vol 11 (1) ◽  
pp. 21-28 ◽  
Author(s):  
Dietmar Heubrock
Keyword(s):  
Error Analysis ◽  
Verbal Memory ◽  
Verbal Learning ◽  
Learning Disorders ◽  
Memory And Learning ◽  
Auditory Verbal Learning Test ◽  
Additional Information ◽  
Auditory Verbal Learning ◽  
Accurate Picture ◽  
Learning Test

Performance on a German version of the Rey Auditory-Verbal Learning Test (AVLT) was investigated for 64 juvenile patients who were subdivided in 6 clinical groups. In addition to standard evaluation of AVLT protocols which is usually confined to items recalled correctly, an error analysis was performed. Differentiating between total errors (TE), repetition errors (RE), and misnamings (ME), substantial differences between clinical groups could be demonstrated. It is argued that error analysis of verbal memory and learning enriches the understanding of neuropsychological syndromes, and provides additional information for diagnostic and clinical use. Thus, it is possible to gain a more accurate picture so that patients can be appropriately retrained, and research into the functional causes of memory and learning disorders can be intensified.

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