Optical fiber spatial filtering technique for investigating carrier dynamics

1988 ◽  
Vol 53 (9) ◽  
pp. 737-739 ◽  
Author(s):  
K. Tai ◽  
S. L. McCall ◽  
W. T. Tsang
Keyword(s):  
Optical Fiber ◽  
Spatial Filtering ◽  
Carrier Dynamics ◽  
Filtering Technique

In-line particle sizing for real-time process control by fibre-optical spatial filtering technique (SFT)

2011 ◽  
Vol 22 (2) ◽  
pp. 203-208 ◽  
Author(s):  
Petrak Dieter ◽  
Dietrich Stefan ◽  
Eckardt Günter ◽  
Köhler Michael
Keyword(s):  
Process Control ◽  
Real Time ◽  
Spatial Filtering ◽  
Particle Sizing ◽  
Time Process ◽  
Filtering Technique

scholarly journals Directional Moiré Boosting Using Spatial Filtering

2021 ◽  
Vol 9 (9) ◽  
pp. 1430-1431
Author(s):  
Joydeep Chatterjee
Keyword(s):  
Spatial Light Modulator ◽  
Spatial Filtering ◽  
Spatial Filter ◽  
Fringe Analysis ◽  
Light Modulator ◽  
Small Frequency ◽  
Simple Method ◽  
Moire Patterns ◽  
Filtering Technique ◽  
Moiré Patterns

Abstract: Overlapping of two or more grating structures of small frequency differences gives rise to the Moiré patterns. While the overall moiré patterns are widely studied, in many cases – specially in case of a zonal fringe analysis – zone or direction based highlighting or suppression of moiré patterns are very helpful. This paper presents a simple method for directional boosting of moiré patterns, generated using Spatial Light Modulator (SLM) based interferometric setup, using the spatial filtering technique. Keywords: Moiré, Spatial Filter, Directional Boosting, Interferometry, Spatial Light Modulator, Optics

Separation of Additive and Subtractive Moire´ Patterns

1971 ◽  
Vol 38 (1) ◽  
pp. 266-269 ◽  
Author(s):  
J. A. Clark ◽  
A. J. Durelli
Keyword(s):  
Experimental Determination ◽  
Spatial Filtering ◽  
Partial Derivatives ◽  
Moire Patterns ◽  
Filtering Technique ◽  
Indicial Equation ◽  
Moiré Patterns

Using a spatial filtering technique, moire´ patterns can be observed that correspond to different forms of the indicial equation describing the parametric properties of gratings and moire´. In particular both the additive and subtractive moire´s are obtained individually over the field. This method, combined with a previously developed method for obtaining spatial partial derivatives from deformed gratings, permits the experimental determination of the whole field of Cartesian shears and rigid rotations.

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