Measurement to local phase modulation of LCSLM using multi-region synchronous processing of carrier interference fringe

2021 ◽  
Author(s):  
Fuzhong Bai ◽  
jiwei lang ◽  
jiayi chen ◽  
jianxin wang ◽  
yongxiang xu
Keyword(s):  
Phase Modulation ◽  
Interference Fringe ◽  
Local Phase

scholarly journals Spindle Error Motion Measurement Using Concentric Circle Grating and Phase Modulation Interferometers

2013 ◽  
Vol 7 (5) ◽  
pp. 506-513 ◽  
Author(s):  
Muhummad Madden ◽  
◽  
Masato Aketagawa ◽  
Shuhei Uesugi ◽  
Takuya Kumagai ◽  
...  
Keyword(s):  
Optical Sensors ◽  
Phase Modulation ◽  
Interference Fringe ◽  
Measurement Instrument ◽  
Concentric Circle ◽  
Order Diffraction ◽  
Fine Pitch ◽  
Reflected Light ◽  
Interpolation Technique ◽  
Error Motion

In the conventional methods of measuring radial, axial, and angular motions of a spindle concurrently, complicated reference artifacts with relative large volume, e.g., two balls linked to a cylinder, are required. A simple and small artifact is favorable from the viewpoint of accurate measurement. This paper describes a concurrent measurement of radial, axial, and angular spindle motions using concentric circle grating and phase modulation interferometers. In the measurement, concentric circle grating with fine pitch is installed on top of the spindle of interest. The grating is a reference artifact in the method. Three optical sensors are fixed over the concentric circle grating, to observe its proper positions. The optical sensor consists of a frequency modulated laser diode as a light source as well as two interferometers. One interferometer observes an interference fringe between reflected light from a fixedmirror and 0-th order diffraction light from the grating to measure the axial motion. Another interferometer observes an interference fringe between ± 2nd order diffraction lights from the grating tomeasure the radialmotion. Using three optical sensors, three axial displacements, and three radial displacements of the proper observed position of the grating can be measured. From these measured displacements, radial, axial, and angular motions of the spindle can be calculated concurrently. In this paper, a measurement instrument, a novel fringe interpolation technique using sinusoidal phase modulation, and experimental results are discussed.

Properties of the Intensity Distribution and the Angular Spectrum of a Gaussian Beam with Local Phase Modulation

2011 ◽  
Vol 38 (10) ◽  
pp. 1002005 ◽  
Author(s):  
苏倩倩 Su Qianqian ◽  
张国文 Zhang Guowen ◽  
陶华 Tao Hua ◽  
蒲继雄 Pu Jixiong
Keyword(s):  
Gaussian Beam ◽  
Intensity Distribution ◽  
Phase Modulation ◽  
Angular Spectrum ◽  
Local Phase

An interferometric method for local phase modulation calibration of LC-SLM using self-generated phase grating

2018 ◽  
Vol 89 (8) ◽  
pp. 083116 ◽  
Author(s):  
Zixin Zhao ◽  
Zhaoxian Xiao ◽  
Yiying Zhuang ◽  
Hangying Zhang ◽  
Hong Zhao
Keyword(s):  
Phase Modulation ◽  
Local Phase ◽  
Interferometric Method ◽  
Phase Grating

The observation of solutions in Ni3Nb

1988 ◽  
Vol 46 ◽  
pp. 540-541
Author(s):  
Z.M. Wang ◽  
J.P. Zhang
Keyword(s):  
Electron Microscopy ◽  
High Resolution ◽  
Phase Modulation ◽  
High Resolution Electron Microscopy ◽  
Antiphase Domain ◽  
Boundary Area ◽  
Matrix Type ◽  
Resolution Electron ◽  
Domain Boundaries ◽  
Kontorova Model

High resolution electron microscopy reveals that antiphase domain boundaries in β-Ni3Nb have a hexagonal unit cell with lattice parameters ah=aβ and ch=bβ, where aβ and bβ are of the orthogonal β matrix. (See Figure 1.) Some of these boundaries can creep “upstairs” leaving an incoherent area, as shown in region P. When the stepped boundaries meet each other, they do not lose their own character. Our consideration in this work is to estimate the influnce of the natural misfit δ{(ab-aβ)/aβ≠0}. Defining the displacement field at the boundary as a phase modulation Φ(x), following the Frenkel-Kontorova model [2], we consider the boundary area to be made up of a two unit chain, the upper portion of which can move and the lower portion of the β matrix type, assumed to be fixed. (See the schematic pattern in Figure 2(a)).

Channel Estimation Method Using Arbitrary Amplitude and Phase Modulation Schemes for MIMO Sensor

2014 ◽  
Vol E97.B (10) ◽  
pp. 2102-2109
Author(s):  
Tsubasa TASHIRO ◽  
Kentaro NISHIMORI ◽  
Tsutomu MITSUI ◽  
Nobuyasu TAKEMURA
Keyword(s):  
Channel Estimation ◽  
Phase Modulation ◽  
Estimation Method ◽  
Arbitrary Amplitude ◽  
Modulation Schemes
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