Video-Based Interferogram Analysis for Measuring Influence of Vibration to White Light Interferometry

2010 ◽  
Vol 447-448 ◽  
pp. 599-603
Author(s):  
Wee Keat Chong ◽  
Xiang Li ◽  
Sardha Wijesoma
Keyword(s):  
White Light ◽  
Vibration Isolation ◽  
Optical Path Difference ◽  
Path Difference ◽  
Optical Path ◽  
Isolation System ◽  
Vibration Isolation System ◽  
White Light Interferometer ◽  
Vibration Pattern ◽  
Measurement Principle

In this paper, we present a video-based interferogram analysis method for measuring the influence of vibration on white light interferometer in terms of undesired change in optical path difference between reference and sample arms. The measurement principle is based on the analysis of interferograms which involves tracking and converting change in interferograms to physical change in optical path difference. The method proposed uses the original sensor in interferometer for data acquisition as such no additional hardware is required. Such an approach ensures that the properties of interferometer such as the bandwidth of sensor are considered and the vibration pattern recorded is close to the effective influence of vibration. With our method, the influence of vibration on white light interferometer and the performance of vibration isolation system can be objectively quantified and measured.

Determination of Optical Path Difference of White Light Fibre Interferometer Using Peak Tracking Method

2014 ◽  
Vol 71 (5) ◽  
Author(s):  
Ley Hood Hong ◽  
Asiah Yahaya ◽  
Yusof Munajat
Keyword(s):  
Light Source ◽  
White Light ◽  
Optical Path Difference ◽  
Path Difference ◽  
Optical Path ◽  
White Led ◽  
Tracking Method ◽  
Peak Tracking ◽  
Wavelength Resolution

The aim of this paper is to evaluate the peak tracking method for determination of optical path difference of a fibre interferometer. This study narros the scope for Mach-Zehnder configuration with neutral white LED as its light source. The peak tracking method is then applied on the interference spectrum recorded from the output port of the interferometer using a spectrometer, allowing the optical path difference to be computed. Accuracy of this method is greatly affected by the wavelength resolution of the detector, where the uncertainty of the result is smaller with higher wavelength resolution and the maximum measurable path difference was found to be about 0.6 mm.  

Rhombic optical path difference bias white light interferometric fiber-optic gyroscope

2021 ◽  
Vol 46 (6) ◽  
pp. 1502
Author(s):  
Ang Li ◽  
Zhenguo Jing ◽  
Qiang Liu ◽  
Yueying Liu ◽  
Yang Cheung ◽  
...  
Keyword(s):  
White Light ◽  
Fiber Optic ◽  
Optical Path Difference ◽  
Path Difference ◽  
Optical Path ◽  
Fiber Optic Gyroscope

Design and analysis of a vibration isolation system with cam–roller–spring–rod mechanism

2021 ◽  
pp. 107754632110005
Author(s):  
Yonglei Zhang ◽  
Guo Wei ◽  
Hao Wen ◽  
Dongping Jin ◽  
Haiyan Hu
Keyword(s):  
Vibration Isolation ◽  
Dynamic Stiffness ◽  
Experimental Studies ◽  
Excitation Amplitude ◽  
Isolation System ◽  
Vibration Isolation System ◽  
Stiffness Characteristic ◽  
Negative Stiffness Mechanism ◽  
Isolation Systems ◽  
Vibration Isolation Performance

The vibration isolation system using a pair of oblique springs or a spring-rod mechanism as a negative stiffness mechanism exhibits a high-static low-dynamic stiffness characteristic and a nonlinear jump phenomenon when the system damping is light and the excitation amplitude is large. It is possible to remove the jump via adjusting the end trajectories of the above springs or rods. To realize this idea, the article presents a vibration isolation system with a cam–roller–spring–rod mechanism and gives the detailed numerical and experimental studies on the effects of the above mechanism on the vibration isolation performance. The comparative studies demonstrate that the vibration isolation system proposed works well and outperforms some other vibration isolation systems.

Peak-to-peak tracking method for measurement of optical path difference: Revisited

Optik ◽  
2015 ◽  
Vol 126 (24) ◽  
pp. 5420-5422
Author(s):  
H.H. Ley ◽  
A. Yahaya ◽  
Y. Munajat
Keyword(s):  
Optical Path Difference ◽  
Path Difference ◽  
Optical Path ◽  
Tracking Method ◽  
Peak Tracking
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