scholarly journals Projection lens testing with Moiré effect

2017 ◽  
Author(s):  
M. Loktev ◽  
Y. Shao
Keyword(s):  
Projection Lens ◽  
Moiré Effect ◽  
Lens Testing

scholarly journals Moiré pattern of interference dislocations in condensate of indirect excitons

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
J. R. Leonard ◽  
Lunhui Hu ◽  
A. A. High ◽  
A. T. Hammack ◽  
Congjun Wu ◽  
...  
Keyword(s):  
Long Range ◽  
Direct Measurement ◽  
Quantum Systems ◽  
Matter Waves ◽  
Moire Pattern ◽  
Indirect Excitons ◽  
Moiré Pattern ◽  
Moiré Effect ◽  
Phase Singularities ◽  
Bose Einstein

AbstractInterference patterns provide direct measurement of coherent propagation of matter waves in quantum systems. Superfluidity in Bose–Einstein condensates of excitons can enable long-range ballistic exciton propagation and can lead to emerging long-scale interference patterns. Indirect excitons (IXs) are formed by electrons and holes in separated layers. The theory predicts that the reduced IX recombination enables IX superfluid propagation over macroscopic distances. Here, we present dislocation-like phase singularities in interference patterns produced by condensate of IXs. We analyze how exciton vortices and skyrmions should appear in the interference experiments and show that the observed interference dislocations are not associated with these phase defects. We show that the observed interference dislocations originate from the moiré effect in combined interference patterns of propagating condensate matter waves. The interference dislocations are formed by the IX matter waves ballistically propagating over macroscopic distances. The long-range ballistic IX propagation is the evidence for IX condensate superfluidity.

Imaging projection lens for excimer laser micromachining

2000 ◽  
Author(s):  
Ying Wan ◽  
Tiechuan Zuo ◽  
Yijian Jiang
Keyword(s):  
Excimer Laser ◽  
Laser Micromachining ◽  
Projection Lens

Moiré effect in cylindrical objects

2016 ◽  
Vol 68 (9) ◽  
pp. 1075-1082 ◽  
Author(s):  
Vladimir Saveljev
Keyword(s):  
Moiré Effect

Application of Moire Methods to the Determination of Transient Stress and Strain Distributions

1962 ◽  
Vol 29 (1) ◽  
pp. 23-29 ◽  
Author(s):  
W. F. Riley ◽  
A. J. Durelli
Keyword(s):  
Strain Distribution ◽  
Stress And Strain ◽  
Two Dimensional ◽  
Distribution Problem ◽  
Principal Stresses ◽  
Transient Stress ◽  
Optical Phenomenon ◽  
Moiré Effect ◽  
Fringe Patterns

When two arrays of lines are superimposed an optical phenomenon known as the moire effect is observed under certain conditions. This moire effect is used by the authors to determine the distribution of transient strains on the surface of two-dimensional bodies. The method can be used to solve completely the strain-distribution problem or it can be used in combination with photoelasticity to separate the principal stresses. The methods used in interpreting the moire fringe patterns and the techniques used to produce the patterns are described in the paper. Two applications are discussed.

Translational-symmetry alternating phase shifting mask grating mark used in a linear measurement model of lithographic projection lens aberrations

2009 ◽  
Vol 48 (19) ◽  
pp. 3654 ◽  
Author(s):  
Zicheng Qiu ◽  
Xiangzhao Wang ◽  
Qunyu Bi ◽  
Qiongyan Yuan ◽  
Bo Peng ◽  
...  
Keyword(s):  
Measurement Model ◽  
Linear Measurement ◽  
Phase Shifting ◽  
Translational Symmetry ◽  
Projection Lens
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