The analysis of light flux distribution from shaping optical fiber

2006 ◽  
Author(s):  
Maciej Zajkowski
Keyword(s):  
Optical Fiber ◽  
Flux Distribution ◽  
Light Flux

scholarly journals Dynamic model of control of vibration damping mode by fiber optic PEL-sensor with phase shifting of control electric voltage.

2020 ◽  
Vol 2020 (10) ◽  
Author(s):  
A.A. Pan'kov ◽  
Keyword(s):  
Optical Fiber ◽  
Dynamic Model ◽  
Electrical Impedance ◽  
Coherent Control ◽  
Mechanical Energy ◽  
Light Flux ◽  
Electric Circuit ◽  
Phase Shifting ◽  
Frequency Range ◽  
Electric Voltage

A mathematical dynamic model of the operation of the vibration pressure optical fiber piezoelectroluminescent (PEL) sensor in the damping mode was developed taking into account the electrical conductivities and Maxwell-Wagnerian relaxation of electric fields in the phases for the case of harmonic stress (vibration pressure) on the external cylindrical surface of the sensor. Analytical solution of damping of stationary axisymmetric oscillations of optical fiber PEL-sensor is obtained and investigated by applying coherent control electric voltage to electrodes of sensor with phase shifting relative to vibration pressure. Regularities of frequency dependencies for real, imaginary parts of control, informative transfer and damping coefficients of sensor are established and studied. Analysis of influence of value and shift angle of phases of control electric voltage on results of numerical simulation for intensity of light flux at output from optical fiber of sensor under action of vibration pressure is performed. Frequency dependencies were found for the electrical impedance of the AC electric circuit of the sensor in comparison with the approximation of these dependencies by electromechanical analogy. It was revealed that in the frequency range under consideration, the electrical impedance of the sensor with satisfactory accuracy is based on consideration of an equivalent electric circuit with parallel connection of frequency-dependent active and capacitive elements. Frequency range and values of control parameters are set for effective active damping of vibration pressure through conversion to Joule heat (dissipation) of mechanical energy supplied to the sensor. The results of comparing the analytical and numerical (in the ANSYS package) approaches confirm the validity and adequacy of the decisions obtained.

scholarly journals 3D reconstruction of light flux distribution on arbitrary surfaces from 2D multi-photographic images

2010 ◽  
Vol 18 (19) ◽  
pp. 19876 ◽  
Author(s):  
Xueli Chen ◽  
Xinbo Gao ◽  
Duofang Chen ◽  
Xiaopeng Ma ◽  
Xiaohui Zhao ◽  
...  
Keyword(s):  
3D Reconstruction ◽  
Flux Distribution ◽  
Light Flux ◽  
Photographic Images

scholarly journals Electro-mechanical model of indicator polymer fiber-optic PEL-coating for diagnosing mechanical effects.

2021 ◽  
Author(s):  
A.A. Pan’kov ◽  
Keyword(s):  
Optical Fiber ◽  
Light Flux ◽  
Mechanical Effect ◽  
Polymer Fiber ◽  
Mechanical Effects ◽  
Flux Intensity ◽  
Characteristic Points ◽  
Informative Characteristic ◽  
Indicator Coating ◽  
Static Pressing

A mathematical model of the functioning of the indicator polymer piezoelectroluminescent (PEL) coating for diagnosing external mechanical effects - quasi-static pressing of rigid ball particles has been developed. The algorithm of numerical processing of informative intensity of light flux at the output from optical fiber built into indicator coating of optical fiber PEL-sensor is presented. A numerical analysis for the case of single mechanical effect revealed the regularities of influence of the values of the sensor spiral pitch on the informative parts of the resulting spectra of light flux intensity and pressure distribution along the length of the sensor spiral. Informative characteristic points of pressure spectra plots were revealed; these are points of maxima, abscissa and values of which make it possible to find the desired values of radius and pressing force of a rigid ball particle.

scholarly journals Simple and Quick Measurement of Neutron Flux Distribution by Using an Optical Fiber with Scintillator

1994 ◽  
Vol 31 (3) ◽  
pp. 248-249 ◽  
Author(s):  
Chizuo MORI ◽  
Taichi OSADA ◽  
Katsuo YANAGIDA ◽  
Takahiko AOYAMA ◽  
Akira URITANI ◽  
...  
Keyword(s):  
Optical Fiber ◽  
Neutron Flux ◽  
Flux Distribution ◽  
Neutron Flux Distribution ◽  
Quick Measurement
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