Digital speckle interferometry: some developments and applications for vibration measurement in the automotive industry

1998 ◽  
Vol 37 (5) ◽  
pp. 1390 ◽  
Author(s):  
Fang Chen
Keyword(s):  
Automotive Industry ◽  
Speckle Interferometry ◽  
Vibration Measurement ◽  
Digital Speckle

scholarly journals Digital Speckle Interferometry to Measure the Angular Diameters Of Faint Objects

1979 ◽  
Vol 50 ◽  
pp. 28-1-28-8 ◽  
Author(s):  
Gene Hubbard ◽  
Mike Reed ◽  
Peter Strittmatter ◽  
Keith Hege ◽  
Simon P. Worden
Keyword(s):  
Speckle Interferometry ◽  
Angular Diameter ◽  
University Of Arizona ◽  
Saturn’S Satellites ◽  
Digital Speckle ◽  
The University ◽  
Angular Diameters

AbstractWe have developed a digital speckle camera for use on the University of Arizona 90-inch telescope. This camera uses a CID detector to provide photon locations in an image, or an analog image for brighter objects. We have used this system to observe Saturn's satellites Rhea and Iapetus. Using a correlation speckle technique, we have determined the angular diameter of these objects to be 1487 ± 40 km for Rhea, and 1200 ± 132 km for Iapetus.

Digital speckle-interferometry camera for nondestructive testing

2000 ◽  
Author(s):  
Dan Apostol ◽  
Victor S. Damian ◽  
Adrian Dobroiu ◽  
Victor Nascov
Keyword(s):  
Nondestructive Testing ◽  
Speckle Interferometry ◽  
Digital Speckle

Digital Speckle Projection for Vibration Measurement by Applying Digital Image Correlation Method

2006 ◽  
Vol 326-328 ◽  
pp. 99-102 ◽  
Author(s):  
Fu Jun Yang ◽  
Xiao Yuan He
Keyword(s):  
Digital Image Correlation ◽  
Digital Image ◽  
High Speed ◽  
Speckle Pattern ◽  
Plane Deformation ◽  
Correlation Method ◽  
Image Correlation ◽  
Vibration Measurement ◽  
Digital Image Correlation Method ◽  
Digital Speckle

Digital image correlation method (DICM) is described as a robust in-plane deformation measuring method due to its simple optical setup and the insensitivity against ambient noise. Based on DICM, digital speckle projection has been developed for shape measurement. This paper explores the possibilities for vibration analysis using digital speckle projection together with DICM. A digital speckle pattern, generated by computer, is projected on an object surface using an LCD projector. Then the dynamic deformation modulated speckle images are captured by a high-speed CCD camera and saved in the computer. By using the self-developed temporal sequence digital images correlation algorithm, the deformation and vibration mode can be analyzed quantitatively. The proposed method avoids using stroboscopic or laser illumination and simplifies the experimental setup for vibration measurement, while it is time-consuming thanks to calculating a large amount of correlation coefficients. The experimental performance on a harmonic-vibrating cantilever beam well demonstrates the validity of the new method.

Impact of Inhomogeneous Light Intensity on Test and Its Correction Method for Digital Speckle Interferometry with Substraction

2009 ◽  
Vol 29 (2) ◽  
pp. 362-365 ◽  
Author(s):  
何东升 He Dongsheng ◽  
杨德兴 Yang Dexing ◽  
古彬 Gu Bin ◽  
方志强 Fang Zhiqiang
Keyword(s):  
Light Intensity ◽  
Correction Method ◽  
Speckle Interferometry ◽  
Digital Speckle
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