Note: A small roll angle measurement method with enhanced resolution based on a heterodyne interferometer

2015 ◽  
Vol 86 (9) ◽  
pp. 096104 ◽  
Author(s):  
S. Tang ◽  
Z. Wang ◽  
M. Li ◽  
W. Zhang ◽  
F. Yang ◽  
...  
Keyword(s):  
Measurement Method ◽  
Angle Measurement ◽  
Roll Angle ◽  
Heterodyne Interferometer ◽  
Enhanced Resolution

A high-precision roll angle measurement method

Optik ◽  
2015 ◽  
Vol 126 (24) ◽  
pp. 4837-4840 ◽  
Author(s):  
Zhai Yusheng ◽  
Zhang Zhifeng ◽  
Su Yuling ◽  
Wang Xinjie ◽  
Feng Qibo
Keyword(s):  
High Precision ◽  
Measurement Method ◽  
Angle Measurement ◽  
Roll Angle

High resolution and stability roll angle measurement method for precision linear displacement stages

2017 ◽  
Vol 88 (2) ◽  
pp. 023102 ◽  
Author(s):  
Tao Jin ◽  
Guizheng Xia ◽  
Wenmei Hou ◽  
Yanfen Le ◽  
Sen Han
Keyword(s):  
High Resolution ◽  
Measurement Method ◽  
Angle Measurement ◽  
Linear Displacement ◽  
Roll Angle

An improved differential-grating plane-mirror heterodyne interferometer for small roll angle measurement of a linear motion

2020 ◽  
Vol 91 (4) ◽  
pp. 045113
Author(s):  
Shanzhi Tang ◽  
Zhongrui Ren ◽  
Qingfu Han ◽  
Weifan Sheng ◽  
Ming Li
Keyword(s):  
Angle Measurement ◽  
Roll Angle ◽  
Plane Mirror ◽  
Linear Motion ◽  
Heterodyne Interferometer

scholarly journals Heterodyne interferometer with two parallel-polarized input beams for high-resolution roll angle measurement

2019 ◽  
Vol 27 (10) ◽  
pp. 13820 ◽  
Author(s):  
Jingya Qi ◽  
Zhao Wang ◽  
Junhui Huang ◽  
Qing Wang ◽  
Jianmin Gao
Keyword(s):  
High Resolution ◽  
Angle Measurement ◽  
Roll Angle ◽  
Heterodyne Interferometer

scholarly journals An Optical Frequency Domain Angle Measurement Method Based on Second Harmonic Generation

Sensors ◽  
2021 ◽  
Vol 21 (2) ◽  
pp. 670
Author(s):  
Wijayanti Dwi Astuti ◽  
Hiraku Matsukuma ◽  
Masaru Nakao ◽  
Kuangyi Li ◽  
Yuki Shimizu ◽  
...  
Keyword(s):  
Femtosecond Laser ◽  
Second Harmonic Generation ◽  
Frequency Domain ◽  
Harmonic Generation ◽  
Measurement Method ◽  
Second Harmonic ◽  
Angle Measurement ◽  
Laser Source ◽  
Optical Frequency ◽  
Measurable Range

This paper proposes a new optical angle measurement method in the optical frequency domain based on second harmonic generation with a mode-locked femtosecond laser source by making use of the unique characteristic of the high peak power and wide spectral range of the femtosecond laser pulses. To get a wide measurable range of angle measurement, a theoretical calculation for several nonlinear optical crystals is performed. As a result, LiNbO3 crystal is employed in the proposed method. In the experiment, the validity of the use of a parabolic mirror is also demonstrated, where the chromatic aberration of the focusing beam caused the localization of second harmonic generation in our previous research. Moreover, an experimental demonstration is also carried out for the proposed angle measurement method. The measurable range of 10,000 arc-seconds is achieved.

Model and Measurement Method of Optical Nonlinearities Caused by the Heterodyne and Homodyne Interference Terms in the Heterodyne Interferometer

2014 ◽  
Vol 613 ◽  
pp. 58-63
Author(s):  
Hai Jin Fu ◽  
Jiu Bin Tan ◽  
Peng Cheng Hu ◽  
Zhi Gang Fan
Keyword(s):  
Measurement Method ◽  
Laser Interferometer ◽  
Optical Nonlinearity ◽  
Laser Source ◽  
Optical Nonlinearities ◽  
Laser Polarization ◽  
Heterodyne Interferometer ◽  
Optical Mixing ◽  
Ultra Precision ◽  
Heterodyne Laser Interferometer

The heterodyne laser interferometer is widely applied in ultra-precision displacement measurement, but its accuracy is seriously restricted by the optical nonlinearity which arises from the optical mixing in the reference and measurement arms. In an ideal heterodyne laser interferometer, the beam from the laser source consists of two orthogonally linear-polarized components with slightly different optical frequencies and the two components can be completely separated by the polarizing optics, one traverses in the reference arm, the other traverses in the measurement arm, both of them are in the form of a pure optical frequency. However, in a real heterodyne laser interferometer, due to the imperfect laser polarization, the optics defect and the misalignment, the two components of the laser beam cant be perfectly separated, therefore both of the reference arm and the measurement arm contain a portion of the two laser components, which leads to an optical mixing in the two arms of the heterodyne interferometer and causes the cyclic nonlinearity of several to tens of nanometers.

scholarly journals A radio navigation angle measurement method with entangled microwave signals

AIP Advances ◽  
2018 ◽  
Vol 8 (6) ◽  
pp. 065217 ◽  
Author(s):  
X. Li ◽  
D. W. Wu ◽  
T. L. Wei ◽  
Q. Miao ◽  
H. N. Zhu ◽  
...  
Keyword(s):  
Measurement Method ◽  
Angle Measurement ◽  
Radio Navigation ◽  
Microwave Signals

Precision roll angle measurement based on digital speckle pattern interferometry

2019 ◽  
Vol 30 (4) ◽  
pp. 045005 ◽  
Author(s):  
Sijin Wu ◽  
Jing Yang ◽  
Weixian Li ◽  
Fan Wu ◽  
Mingli Dong
Keyword(s):  
Speckle Pattern ◽  
Angle Measurement ◽  
Roll Angle ◽  
Digital Speckle Pattern Interferometry ◽  
Digital Speckle
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