Vibration-insensitive optical path length control transducer for ring laser gyroscope

2019 ◽  
Vol 61 (4) ◽  
pp. 581-591
Author(s):  
Xudong Yu ◽  
Yuanping Xie ◽  
Zhenyu Xiong ◽  
Chang Liu
Keyword(s):  
Ring Laser ◽  
Path Length ◽  
Optical Path Length ◽  
Optical Path ◽  
Ring Laser Gyroscope ◽  
Laser Gyroscope ◽  
Path Length Control

Finite Element Modeling of Optical Path Length Control Device for Laser Gyroscope

2014 ◽  
Vol 496-500 ◽  
pp. 1169-1175
Author(s):  
Xu Dong Yu ◽  
Yuan Pin Xie ◽  
Peng Fei Zhang ◽  
Guang Feng Lu ◽  
Yu Nong Xu ◽  
...  
Keyword(s):  
Finite Element ◽  
Path Length ◽  
Structural Parameters ◽  
Optical Path Length ◽  
Control Device ◽  
Optical Path ◽  
Response Analysis ◽  
Laser Gyroscope ◽  
Simulation Results ◽  
Path Length Control

Optical path length variations due to temperature, manufacturing misalignments, operation environments can affect the performance of ring laser gyroscope (RLG). This paper presents a structural design of optical path length control device (PLC) using finite element analysis. The static analysis and harmonic response analysis of the PLC is performed to investigate the deformation on different voltage, and model analysis is selected to determine the natural frequency and eigenmodes. To validate the simulation results, an experiment on RLG with mode-scanning is carried out and the maximum errors are within 0.025um. The experiment results are found to be in good agreement with the simulation results. The results indicate that the finite element model can be beneficial to designing and optimizing the structural parameters for the PLC.

Optical path length control in plasma absorption measurements

2002 ◽  
Vol 73 (7) ◽  
pp. 2578-2582 ◽  
Author(s):  
Brett A. Cruden ◽  
M. V. V. S. Rao ◽  
Surendra P. Sharma ◽  
M. Meyyappan
Keyword(s):  
Path Length ◽  
Optical Path Length ◽  
Optical Path ◽  
Plasma Absorption ◽  
Path Length Control ◽  
Absorption Measurements

Analysis of the possibility for optical path full automation when working with a ring laser gyroscope

2021 ◽  
Author(s):  
Keyword(s):  
Ring Laser ◽  
Optical Purity ◽  
Optical Path ◽  
Ring Laser Gyroscope ◽  
Optical Mirrors ◽  
Key Features ◽  
Laser Gyroscope ◽  
Full Automation

The key features of the focusing modes of optical mirrors are considered; two focusing modes are developed and two algorithms for the implementation of these modes at the operator’s workplace are described. Keywords gyroscopic devices; ring laser gyroscope; operator’s workplace; control of the mirror optical purity; scattering of particles; optical path

High-Speed Mechanical Actuator for Precision Optical Path Length Control

2009 ◽  
Vol 48 (1) ◽  
pp. 010212 ◽  
Author(s):  
Kosuke Machida ◽  
Shigenori Moriwaki ◽  
Norikatsu Mio
Keyword(s):  
Path Length ◽  
High Speed ◽  
Optical Path Length ◽  
Optical Path ◽  
Path Length Control

Investigation of particulate systems using optical pathlength spectroscopy

2000 ◽  
Vol 627 ◽  
Author(s):  
Gabriel Popescu ◽  
Aristide Dogariu
Keyword(s):  
Path Length ◽  
Random Media ◽  
Michelson Interferometer ◽  
Industrial Process ◽  
Optical Path Length ◽  
Industrial Applications ◽  
Optical Path ◽  
Interference Signal ◽  
Optical Length ◽  
Reference Mirror

ABSTRACTIn many industrial applications involving granular media, knowledge about the structural transformations suffered during the industrial process is desirable. Optical techniques are noninvasive, fast, and versatile tools for monitoring such transformations. We have recently introduced optical path-length spectroscopy as a new technique for random media investigation. The principle of the method is to use a partially coherent source in a Michelson interferometer, where the fields from a reference mirror and the sample are combined to obtain an interference signal. When the system under investigation is a multiple-scattering medium, by tuning the optical length of the reference arm, the optical path-length probability density of light backscattered from the sample is obtained. This distribution carries information about the structural details of the medium. In the present paper, we apply the technique of optical path-length spectroscopy to investigate inhomogeneous distributions of particulate dielectrics such as ceramics and powders. The experiments are performed on suspensions of systems with different solid loads, as well as on powders and suspensions of particles with different sizes. We show that the methodology is highly sensitive to changes in volume concentration and particle size and, therefore, it can be successfully used for real-time monitoring. In addition, the technique is fiber optic-based and has all the advantages associated with the inherent versatility.

scholarly journals Stray light characterization with ultrafast time-of-flight imaging

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
L. Clermont ◽  
W. Uhring ◽  
M. Georges
Keyword(s):  
Path Length ◽  
Imaging System ◽  
Time Of Flight ◽  
Optical Path Length ◽  
Optical Path ◽  
Stray Light ◽  
Laser Source ◽  
Space Telescopes ◽  
Characterization Methods ◽  
Instance Space

AbstractUnderstanding stray light (SL) is a crucial aspect in the development of high-end optical instruments, for instance space telescopes. As it drives image quality, SL must be controlled by design and characterized experimentally. However, conventional SL characterization methods are limited as they do not provide information on its origins. The problem is complex due to the diversity of light interaction processes with surfaces, creating various SL contributors. Therefore, when SL level is higher than expected, it can be difficult to determine how to improve the system. We demonstrate a new approach, ultrafast time-of-flight SL characterization, where a pulsed laser source and a streak camera are used to record individually SL contributors which travel with a specific optical path length. Furthermore, the optical path length offers a means of identification to determine its origin. We demonstrate this method in an imaging system, measuring and identifying individual ghosts and scattering components. We then show how it can be used to reverse-engineer the instrument SL origins.

scholarly journals Concept of MEMS Ring Laser Gyroscope with Movable Optical Parts

2009 ◽  
Vol 1 (1) ◽  
pp. 564-567 ◽  
Author(s):  
T. Hashimoto ◽  
J. Maeya ◽  
T. Fujita ◽  
K. Maenaka
Keyword(s):  
Ring Laser ◽  
Ring Laser Gyroscope ◽  
Laser Gyroscope
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