Alternative method of wavelength drift free dual-wavelength heterodyne interferometry for the absolute distance measurement

2009 ◽  
Vol 16 (4) ◽  
pp. 492-494
Author(s):  
Kun-Huang Chen ◽  
Jing-Heng Chen ◽  
Chi-Chang Wu ◽  
Wei-Yao Chang
Keyword(s):  
Distance Measurement ◽  
Dual Wavelength ◽  
Absolute Distance ◽  
Heterodyne Interferometry ◽  
Alternative Method ◽  
The Absolute

scholarly journals Absolute distance interferometry for subaperture stitching of large freeform optics

2020 ◽  
Vol 238 ◽  
pp. 06011
Author(s):  
Jan Spichtinger ◽  
Michael Schulz ◽  
Gerd Ehret
Keyword(s):  
Measurement System ◽  
Optical Axis ◽  
Distance Measurement ◽  
Fizeau Interferometer ◽  
Absolute Distance ◽  
Local Surface ◽  
Surface Gradient ◽  
Freeform Optics ◽  
The Absolute ◽  
Subaperture Stitching

We are developing a form measurement system for the surfaces of freeform optics and large conventional optics. The specifications of the optics are diameters up to 1.5 m and radii of curvature down to 10 m. This includes optics like telescope mirror segments and synchrotron optics. Using a Fizeau interferometer, we propose a subaperture stitching method that involves vertically aligning the interferometer’s optical axis to the local surface gradient and measuring the absolute distance from the interferometer’s reference flat to the specimen. Experimental results for the absolute distance measurement are shown.

Absolute distance measurement by using modified dual-wavelength heterodyne Michelson interferometer

2009 ◽  
Vol 282 (9) ◽  
pp. 1837-1840 ◽  
Author(s):  
Kun-Huang Chen ◽  
Jing-Heng Chen ◽  
Shen-Hua Lu ◽  
Wei-Yao Chang ◽  
Chi-Chang Wu
Keyword(s):  
Michelson Interferometer ◽  
Distance Measurement ◽  
Dual Wavelength ◽  
Absolute Distance

Absolute distance measurement by multi-heterodyne interferometry using a frequency comb and a cavity-stabilized tunable laser

2016 ◽  
Vol 55 (15) ◽  
pp. 4210 ◽  
Author(s):  
Hanzhong Wu ◽  
Fumin Zhang ◽  
Tingyang Liu ◽  
Petr Balling ◽  
Xinghua Qu
Keyword(s):  
Frequency Comb ◽  
Tunable Laser ◽  
Distance Measurement ◽  
Absolute Distance ◽  
Heterodyne Interferometry

Absolute distance measurement by multi-heterodyne interferometry using an electro-optic triple comb

2018 ◽  
Vol 43 (4) ◽  
pp. 807 ◽  
Author(s):  
Xianyu Zhao ◽  
Xinghua Qu ◽  
Fumin Zhang ◽  
Yuhang Zhao ◽  
Guoqing Tang
Keyword(s):  
Distance Measurement ◽  
Absolute Distance ◽  
Heterodyne Interferometry ◽  
Electro Optic

scholarly journals Dual-Comb Absolute Distance Measurement Based on a Dual-Wavelength Passively Mode-Locked Laser

2017 ◽  
Vol 9 (6) ◽  
pp. 1-8 ◽  
Author(s):  
Baike Lin ◽  
Xin Zhao ◽  
Mingzhao He ◽  
Yingling Pan ◽  
Jie Chen ◽  
...  
Keyword(s):  
Distance Measurement ◽  
Dual Wavelength ◽  
Absolute Distance ◽  
Mode Locked Laser
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