Laser Speckle Metrology Using Holo-Lens Imaging System And Its Application In Fracture Mechanics

1987 ◽  
Author(s):  
Chandra Shakher ◽  
G. Venkata Rao ◽  
Heera Lal Yadav ◽  
B. N. Gupta
Keyword(s):  
Fracture Mechanics ◽  
Imaging System ◽  
Laser Speckle ◽  
Speckle Metrology

scholarly journals Laser speckle contrast imaging system using nanosecond pulse laser source

2020 ◽  
Vol 25 (05) ◽  
pp. 1
Author(s):  
Yuemei Zhao ◽  
Kang Wang ◽  
Weitao Li ◽  
Huan Zhang ◽  
Zhiyu Qian ◽  
...  
Keyword(s):  
Pulse Laser ◽  
Imaging System ◽  
Nanosecond Pulse ◽  
Laser Speckle ◽  
Laser Source ◽  
Contrast Imaging ◽  
Laser Speckle Contrast Imaging ◽  
Speckle Contrast ◽  
Nanosecond Pulse Laser

Source coherence in laser speckle blood imaging system

2019 ◽  
Vol 27 (10) ◽  
pp. 2127-2135
Author(s):  
李宜璋 Li Yi-zhang ◽  
杨 晖 YANG Hui ◽  
李 然 LI Ran ◽  
刘宏业 LIU Hong-ye ◽  
范彦平 FAN Yan-ping ◽  
...  
Keyword(s):  
Imaging System ◽  
Laser Speckle ◽  
Blood Imaging

Acoustic Speckle: Theory and Experimental Analysis

1979 ◽  
Vol 1 (4) ◽  
pp. 303-324 ◽  
Author(s):  
John G. Abbott ◽  
F. L. Thurstone
Keyword(s):  
Experimental Study ◽  
Experimental Analysis ◽  
Phased Array ◽  
Imaging System ◽  
Experimental Studies ◽  
Laser Speckle ◽  
Speckle Reduction ◽  
Multiple Images ◽  
Starting Point ◽  
Speckle Patterns

A theoretical and experimental study of speckle, as applied to ultrasonic imaging, is presented. The concept of laser speckle is briefly reviewed and is used as a starting point to explain the origin of acoustic speckle. The primary differences between these two phenomena are discussed and are confirmed by experiment. An experimental study of speckle reduction by summation of multiple images is also presented. Several techniques for generating independent speckle patterns for use in image summation schemes are proposed. A phased array, dynamically focused sector imaging system was used in all of the experimental studies reported.

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