Dual interferometry FMCW laser ranging for high precision absolute distance measurement system

2016 ◽  
Vol 45 (8) ◽  
pp. 806001
Author(s):  
时 光 Shi Guang ◽  
王 文 Wang Wen
Keyword(s):  
High Precision ◽  
Measurement System ◽  
Distance Measurement ◽  
Laser Ranging ◽  
Absolute Distance

All Polarization Maintaining Fiber Based Dual-Comb High Precision Absolute Distance Measurement System

2015 ◽  
Vol 35 (s2) ◽  
pp. s212001
Author(s):  
许立明 Xu Liming ◽  
宋有建 Song Youjian ◽  
梁飞 Liang Fei ◽  
师浩森 Shi Haosen ◽  
胡明列 Hu Minglie ◽  
...  
Keyword(s):  
High Precision ◽  
Measurement System ◽  
Distance Measurement ◽  
Absolute Distance ◽  
Polarization Maintaining Fiber ◽  
Polarization Maintaining

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.

High speed and high precision time-interval measurement system in pulsed laser ranging

2015 ◽  
Vol 30 (1) ◽  
pp. 83-88 ◽  
Author(s):  
岱钦 DAI Qin ◽  
毛有明 MAO You-ming ◽  
吴凯旋 WU Kai-xuan ◽  
吴杰 WU Jie ◽  
李业秋 LI Ye-qiu
Keyword(s):  
High Precision ◽  
Measurement System ◽  
High Speed ◽  
Pulsed Laser ◽  
Laser Ranging ◽  
Time Interval ◽  
Interval Measurement ◽  
Precision Time ◽  
Time Interval Measurement

A New System of High-Precision Absolute Laser Interferometer Distance Measurement

2013 ◽  
Vol 380-384 ◽  
pp. 769-772
Author(s):  
Chen Yang Zhang ◽  
Bing Li
Keyword(s):  
High Precision ◽  
Laser Scanning ◽  
Laser Interferometer ◽  
Laser Interferometry ◽  
Distance Measurement ◽  
Absolute Distance ◽  
Distance Information ◽  
New Methods ◽  
Interference Fringes ◽  
New System

With the improvement of precision in various fields, we present a new method for the measurement of the absolute distance of a remote target based on the laser interferometry technique. In this paper, we obtain the interference fringes change information (the distance information) with the help of laser scanning with different frequency. It does not require the target to move in the direction of measurement. We have done experiments to compare this new methods results with the results of RENISHAW interferometer. Its improved that the accuracy of distance measurement is 10-4~10-5 relatively.

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