scholarly journals Laser interferometric high-precision geometry (angle and length) monitor for JASMINE

2007 ◽  
Vol 3 (S248) ◽  
pp. 280-281
Author(s):  
Y. Niwa ◽  
K. Arai ◽  
A. Ueda ◽  
M. Sakagami ◽  
N. Gouda ◽  
...  
Keyword(s):  
Wave Front ◽  
High Precision ◽  
Small Scales ◽  
Laser Metrology ◽  
Laser Interferometric ◽  
Metrology System

AbstractThe telescope geometry of JASMINE should be stabilized and monitored with the accuracy of about 10 to 100 pm or 10 to 100 prad of rms over about 10 hours. For this purpose, a high-precision interferometric laser metrology system is employed. Useful techniques for measuring displacements on extremely small scales are the wave-front sensing method and the heterodyne interferometrical method. Experiments for verification of measurement principles are well advanced.

Active figure maintenance control using an optical truss laser metrology system for a space-based far-IR segmented telescope

1992 ◽  
Author(s):  
Kenneth H. Lau ◽  
William G. Breckenridge ◽  
Noble M. Nerheim ◽  
David C. Redding
Keyword(s):  
Laser Metrology ◽  
Metrology System

scholarly journals The Baseline Metrology System of the USNO Astrometric Interferometer

1994 ◽  
Vol 158 ◽  
pp. 174-176 ◽  
Author(s):  
Nicholas M. Elias ◽  
Donald J. Hutter
Keyword(s):  
High Resolution ◽  
Northern Hemisphere ◽  
Three Dimensional ◽  
Optical Interferometer ◽  
Laser Metrology ◽  
Under Construction ◽  
Metrology System ◽  
Better Than

The USNO Astrometric Interferometer (USNOAI; a subarray of the Navy Prototype Optical Interferometer at Lowell Observatory) is presently under construction and expected to begin limited operations within a year. The main goal of the USNOAI observations is to provide a northern hemisphere catalog of several thousand stars with positions known to a few mas. In order to meet this requirement, a baseline laser metrology system must be employed to measure the three-dimensional motions of the baselines with an accuracy better than ~ 0.1 μm. The metrology scheme, as presently conceived, represents the largest and most complex high-resolution laser metrology system ever attempted.

Development of laser interferometric high-precision geometry monitor for JASMINE

2008 ◽  
Author(s):  
Yoshito Niwa ◽  
Koji Arai ◽  
Akitoshi Ueda ◽  
Masaaki Sakagami ◽  
Naoteru Gouda ◽  
...  
Keyword(s):  
High Precision ◽  
Laser Interferometric

scholarly journals Low-cost scheme for high-precision dual-wavelength laser metrology

2013 ◽  
Vol 52 (12) ◽  
pp. 2808 ◽  
Author(s):  
Yitping Kok ◽  
Michael J. Ireland ◽  
J. Gordon Robertson ◽  
Peter G. Tuthill ◽  
Benjamin A. Warrington ◽  
...  
Keyword(s):  
High Precision ◽  
Low Cost ◽  
Dual Wavelength ◽  
Dual Wavelength Laser ◽  
Laser Metrology

Laser Wave-Front Measuring Based on Quadri-Wave Lateral Shearing Interferometry

2014 ◽  
Vol 568-570 ◽  
pp. 50-54 ◽  
Author(s):  
Juan Ren ◽  
Xiu Juan Luo ◽  
Ai Li Xia ◽  
Yu Zhang
Keyword(s):  
Wave Front ◽  
Adaptive Optics ◽  
Least Square Method ◽  
Reconstruction Error ◽  
Least Square ◽  
Shearing Interferometry ◽  
Lateral Shearing Interferometer ◽  
Lateral Shearing ◽  
Laser Metrology ◽  
Lateral Shearing Interferometry

Quadri-wave lateral shearing interferometry (QWLSI) is a new and powerful technique for wave-front measurement. This paper deduced the principle of QWLSI in details, showed a Fourier analysis of the resulting interferogram, then obtained a wave-front with high accuracy and minimum reconstruction error by using the least square method. Finally a 532nm laser was measured to validate the reconstruction, and the error analysis was discussed in practical laser metrology. It is concluded that QWLSI provides a better choice for the adaptive optics as compared with traditional lateral shearing interferometer (TLSI) and Shack-Hartmann (S-H) wave-front sensor.

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