Algebraic cancellation of inter-channel crosstalk in multiplexed heterodyne interferometry

2021 ◽  
Author(s):  
Anneshwa Dey ◽  
Ya Zhang ◽  
Justin Wong ◽  
Paul Sibley ◽  
Chathura Bandutunga ◽  
...  
Keyword(s):  
Heterodyne Interferometry

scholarly journals Development of a Compound Speckle Interferometer for Precision Three-Degree-of-Freedom Displacement Measurement

Sensors ◽  
2021 ◽  
Vol 21 (5) ◽  
pp. 1828
Author(s):  
Hung-Lin Hsieh ◽  
Bo-Yen Sun
Keyword(s):  
Speckle Interferometry ◽  
Degree Of Freedom ◽  
Heterodyne Interferometry ◽  
Beam Splitting ◽  
Speckle Interferometer ◽  
Real World Applications ◽  
Three Degree Of Freedom ◽  
Contact Displacement ◽  
Displacement Measurements ◽  
Measurement Capabilities

In this study, a compound speckle interferometer for measuring three-degree-of-freedom (3-DOF) displacement is proposed. The system, which combines heterodyne interferometry, speckle interferometry and beam splitting techniques, can perform precision 3-DOF displacement measurements, while still having the advantages of high resolution and a relatively simple configuration. The incorporation of speckle interferometry allows for non-contact displacement measurements by detecting the phase of the speckle interference pattern formed from the convergence of laser beams on the measured rough surface. Experiments were conducted to verify the measurement capabilities of the system, and the results show that the proposed system has excellent measurement capabilities suitable for future real-world applications.

LabVIEW-FPGA-Based Real-Time Data Acquisition System for ADITYA-U Heterodyne Interferometry

2021 ◽  
pp. 1-7
Author(s):  
Kiran Patel ◽  
Umesh Nagora ◽  
Hem C. Joshi ◽  
Surya Pathak ◽  
Kumarpalsinh A. Jadeja ◽  
...  
Keyword(s):  
Data Acquisition ◽  
Real Time ◽  
Data Acquisition System ◽  
Acquisition System ◽  
Heterodyne Interferometry ◽  
Time Data ◽  
Real Time Data ◽  
Labview Fpga

Electronic limitations in phase meters for heterodyne interferometry

1993 ◽  
Vol 15 (3) ◽  
pp. 173-179 ◽  
Author(s):  
N.M. Oldham ◽  
J.A. Kramar ◽  
P.S. Hetrick ◽  
E.C. Teague
Keyword(s):  
Heterodyne Interferometry
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