A novel and simple heterodyne interferometer scheme

2020 ◽  
Author(s):  
Yanfen Le ◽  
Shijialuo Jin ◽  
Tao Jin
Keyword(s):  
Heterodyne Interferometer

TWO FREQUENCY "UNAMBIGUOUS" HETERODYNE INTERFEROMETER BASED ON PHASE LOCKED MILLIMETER-WAVE BAND TRANSCEIVERS

2017 ◽  
Vol 76 (10) ◽  
pp. 903-918
Author(s):  
A. V. Varavin ◽  
G. P. Ermak ◽  
A. S. Vasilev ◽  
A. V. Fateev ◽  
N. V. Varavin ◽  
...  
Keyword(s):  
Millimeter Wave ◽  
Wave Band ◽  
Heterodyne Interferometer ◽  
Millimeter Wave Band

High-speed subnanometre interferometry using an improved three-mode heterodyne interferometer

2005 ◽  
Vol 16 (9) ◽  
pp. 1841-1847 ◽  
Author(s):  
Shuko Yokoyama ◽  
Toshiyuki Yokoyama ◽  
Tsutomu Araki
Keyword(s):  
High Speed ◽  
Heterodyne Interferometer

Polarization spatial heterodyne interferometer: model and calibration

2014 ◽  
Vol 53 (4) ◽  
pp. 044104 ◽  
Author(s):  
Michael W. Kudenov ◽  
Matthew N. Miskiewicz ◽  
Michael J. Escuti ◽  
James F. Coward
Keyword(s):  
Heterodyne Interferometer

Calibration of high-frequency hydrophone up to 40MHz by heterodyne interferometer

Ultrasonics ◽  
2014 ◽  
Vol 54 (1) ◽  
pp. 402-407 ◽  
Author(s):  
Ping Yang ◽  
Guangzhen Xing ◽  
Longbiao He
Keyword(s):  
High Frequency ◽  
Heterodyne Interferometer

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.

A Two-Dimensional Surface Profile Imaging Technique Based on Heterodyne Interferometer

2005 ◽  
Vol 295-296 ◽  
pp. 477-482
Author(s):  
K.W. Wang ◽  
Z.J. Cai ◽  
Li Jiang Zeng
Keyword(s):  
High Speed ◽  
Imaging Technique ◽  
Surface Profile ◽  
Ccd Camera ◽  
Measurement Range ◽  
Interference Signal ◽  
Two Dimensional ◽  
Step Method ◽  
Heterodyne Interferometer ◽  
Dimensional Surface

A two-dimensional surface profile imaging technique based on heterodyne interferometer is proposed. A piezo translator vibrated grating is used to generate a heterodyne signal. A high speed CCD camera is used to extract the interference signal using a five step method. The uncertainty in the displacement measurement is approximately 0.035 µm within a measurement range of 1.7 µm, confirming the two dimensional heterodyne interferometer is valid for measuring the surface profile. The method is also available for low coherence heterodyne interferometer due to the optical frequency shifts caused by the vibration of grating independent on the wavelength.

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