scholarly journals Thermal wave interference with high-power VCSEL arrays for locating vertically oriented subsurface defects

2018 ◽  
Author(s):  
Erik Thiel ◽  
Marc Kreutzbruck ◽  
Taarna Studemund ◽  
Mathias Ziegler
Keyword(s):  
High Power ◽  
Thermal Wave ◽  
Wave Interference ◽  
Vcsel Arrays ◽  
Subsurface Defects

Progress in high-power high-efficiency VCSEL arrays

2009 ◽  
Author(s):  
Jean-Francois Seurin ◽  
Guoyang Xu ◽  
Viktor Khalfin ◽  
Alexander Miglo ◽  
James D. Wynn ◽  
...  
Keyword(s):  
High Power ◽  
High Efficiency ◽  
Vcsel Arrays

Study on Infrared Thermal Wave Inspection Technology Using Linear Frequency Modulated (LFM) Light Excitation

2012 ◽  
Vol 542-543 ◽  
pp. 659-662
Author(s):  
Li Qiang Liu ◽  
Jun Yan Liu ◽  
Yang Wang
Keyword(s):  
Heat Flux ◽  
Frequency Modulation ◽  
Thermal Wave ◽  
Steel Sample ◽  
Experimental Results ◽  
Linear Frequency ◽  
Wave Imaging ◽  
Light Excitation ◽  
Modulated Light ◽  
Subsurface Defects

This paper provides the theory, mathematics analysis and experiments in support of the Infrared thermal-wave inspection on the subsurface defects in a solid using linear frequency modulated light excitation (LFMTWI). The specimen is heated by the heat flux of linear frequency modulation for launching thermal-wave into the sample in a desired range of frequency. The more thermal wave responses characters are obtained, and the IR thermal-wave imaging shows much more advantages for subsurface defects detection. The simulation and experimental results from steel sample are presented in support of this technique.

Scalable high-power, high-speed CW VCSEL arrays

2009 ◽  
Vol 45 (8) ◽  
pp. 414 ◽  
Author(s):  
R. Safaisini ◽  
J.R. Joseph ◽  
G. Dang ◽  
K.L. Lear
Keyword(s):  
High Power ◽  
High Speed ◽  
Vcsel Arrays

Compact illumination modules based on high-power VCSEL arrays

2008 ◽  
Author(s):  
Christiane Gimkiewicz ◽  
Michael Columbus ◽  
Michael Moser
Keyword(s):  
High Power ◽  
Vcsel Arrays

High-power VCSEL arrays for emission in the watt regime at room temperature

2001 ◽  
Vol 13 (3) ◽  
pp. 173-175 ◽  
Author(s):  
M. Miller ◽  
M. Grabherr ◽  
R. Jager ◽  
K.J. Ebeling
Keyword(s):  
High Power ◽  
Room Temperature ◽  
Vcsel Arrays

Low-divergence high-power VCSEL arrays for lidar application

2018 ◽  
Author(s):  
Mial E. Warren ◽  
Matthew K. Block ◽  
Preethi Dacha ◽  
Richard F. Carsonn ◽  
David Podva ◽  
...  
Keyword(s):  
High Power ◽  
Vcsel Arrays
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