scholarly journals Fringe Patterns

Nature ◽  
1970 ◽  
Vol 226 (5251) ◽  
pp. 1179-1180
Author(s):  
W. T. WELFORD
Keyword(s):  
Fringe Patterns

Stress Analysis of Tire Sections

1996 ◽  
Vol 24 (4) ◽  
pp. 349-366 ◽  
Author(s):  
T-M. Wang ◽  
I. M. Daniel ◽  
K. Huang
Keyword(s):  
Finite Element ◽  
Internal Pressure ◽  
Stress Analysis ◽  
Strain Analysis ◽  
Experimental Stress ◽  
Inflation Pressure ◽  
Substantial Agreement ◽  
Finite Element Stress Analysis ◽  
Strain Components ◽  
Fringe Patterns

Abstract An experimental stress-strain analysis by means of the Moiré method was conducted in the area of the tread and belt regions of tire sections. A special loading fixture was designed to support the tire section and load it in a manner simulating service loading and allowing for Moiré measurements. The specimen was loaded by imposing a uniform fixed deflection on the tread surface and increasing the internal pressure in steps. Moiré fringe patterns were recorded and analyzed to obtain strain components at various locations of interest. Maximum strains in the range of 1–7% were determined for an effective inflation pressure of 690 kPa (100 psi). These results were in substantial agreement with results obtained by a finite element stress analysis.

Image Processing Techniques Applied to Enhancement of Holographic Fringe Patterns

1996 ◽  
Vol 25 (1) ◽  
pp. 61-68
Author(s):  
A. G. Khadakkar ◽  
R. Madhana Sundari ◽  
R. Narayanan
Keyword(s):  
Image Processing ◽  
Image Processing Techniques ◽  
Fringe Patterns ◽  
Processing Techniques

scholarly journals A Whole-Field Interferometric Scheme for Measuring strain and Flow Rates of Glacier and Other Natural Surfaces

1983 ◽  
Vol 29 (103) ◽  
pp. 492-497
Author(s):  
Gary Cloud ◽  
Edgar Conley
Keyword(s):  
Displacement Vector ◽  
Surface Displacement ◽  
Time Lapse ◽  
Speckle Interferometry ◽  
Narrow Beam ◽  
Coherent Light ◽  
Ice Surface ◽  
Glacier Ice ◽  
Fringe Patterns ◽  
Small Overlap

AbstractThe flow of glacier ice is mapped using high-resolution photography and non-coherent-light speckle interferometry. Young’s fringe patterns result when a double-exposed photoplate image of the straining surface is illuminated by a narrow beam of coherent light. Geometry gives a relationship between the ice surface displacement vector and the interference fringe patterns. This displacement vector is corrected for rigid-body (camera) movement and projected onto the ice surface using topological maps. The strain during the time-lapse interval is thus known. Comparison with data acquired by surveying techniques at Nisqually Glacier, Washington, U.S.A., is limited because of small overlap of the surface studied. In the areas for which results can be compared, our experiments yield a flow of 0.6 m/d where conventional methods yield about 0.4 m/d.

3D Profile Variety Measurement of Pectoral Fin in Fish Fast Start

2011 ◽  
Vol 83 ◽  
pp. 280-284
Author(s):  
Ming Jiang ◽  
Shu Zhang ◽  
Xiao Yuan He
Keyword(s):  
Fourier Transform ◽  
High Speed ◽  
Kinetic Characteristic ◽  
Three Dimensional ◽  
Pectoral Fin ◽  
Fourier Transform Profilometry ◽  
Fast Start ◽  
Fringe Patterns ◽  
3D Information ◽  
3D Profile

Fast-starts are brief, sudden accelerations used by fish during predator-prey encounters. In this paper, a three-dimensional (3D) test and analysis method is critical to understand the function of the pectoral fin during maneuvers. An experiment method based on Fourier Transform Profilometry for 3D pectoral fin profile variety during fish maneuvers is proposed. This method was used in a carp fast-start during prey. Projecting the moiré fringes onto a carp pectoral fin it will produce the deformed fringe patterns contain 3D information. A high speed camera captures these time-sequence images. By Fourier transform, filter, inverse Fourier transform and unwrap these phase maps in 3D phase space, the complex pectoral fin profile variety were really reconstructed. The present study provides a new method to quantify the analysis of kinetic characteristic of the pectoral fin during maneuvers.

Target resolvability from single-tone fringe patterns of digitally spotlighted SAR image

1998 ◽  
Author(s):  
Shih I. Chou ◽  
Michael E. Pollock ◽  
Mehrdad Soumekh
Keyword(s):  
Sar Image ◽  
Single Tone ◽  
Fringe Patterns

Multi-view phase unwrapping with composite fringe patterns

2017 ◽  
Author(s):  
Tianyang Tao ◽  
Qian Chen ◽  
Yuzhen Zhang ◽  
Yan Hu ◽  
Jian Da ◽  
...  
Keyword(s):  
Phase Unwrapping ◽  
Fringe Patterns

Model of a Slip Sensor

1993 ◽  
Vol 207 (1) ◽  
pp. 55-64 ◽  
Author(s):  
F Eghtedari ◽  
S H Hopkins ◽  
D T Pham
Keyword(s):  
Solid State ◽  
Computer Modelling ◽  
Design Parameters ◽  
Slip Sensor ◽  
Fringe Patterns ◽  
Switching Characteristics ◽  
Main Components ◽  
Photoelastic Sensor ◽  
Slip Detection

This paper describes the mathematical and computer modelling of a photoelastic sensor for slip detection. The main components of the sensor are a photoelastic transducer and a solid state camera. When under stress, the photoelastic transducer generates optical fringe patterns which are captured digitally by the camera. The model developed encompasses the mechanical and optical behaviours of the photoelastic transducer and the switching characteristics of the camera pixels. The model has been employed to study the effects of different design parameters on the sensor's slip resolution.

Evaluation of fringe patterns in an optimized holographic interferometric microscope with conjugated reconstruction

1996 ◽  
Author(s):  
Guenther K. Wernicke ◽  
Oliver Kruschke ◽  
Torsten Huth ◽  
Nazif Demoli ◽  
Hartmut Gruber
Keyword(s):  
Fringe Patterns
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