Laser Interferometric Method For The Measurement Of Film Thickness, Using Holographic Optical Components

1988 ◽  
Author(s):  
K. Matsuda ◽  
M. Namiki
Keyword(s):  
Film Thickness ◽  
Optical Components ◽  
Interferometric Method ◽  
Laser Interferometric

Laser interferometric method for determination of elastoplastic strain field

2003 ◽  
Author(s):  
Shibin Wang ◽  
Jingwei Tong ◽  
Mario Cottron ◽  
Linan Li ◽  
Zhiyong Wang
Keyword(s):  
Strain Field ◽  
Elastoplastic Strain ◽  
Interferometric Method ◽  
Laser Interferometric

Laser interferometric method for determining the carrier diffusion length in semiconductors

2015 ◽  
Vol 49 (9) ◽  
pp. 1119-1124 ◽  
Author(s):  
V. V. Manukhov ◽  
A. B. Fedortsov ◽  
A. S. Ivanov
Keyword(s):  
Diffusion Length ◽  
Interferometric Method ◽  
Carrier Diffusion ◽  
Laser Interferometric

Determination of a micromirror angular rotation using laser interferometric method

2001 ◽  
Vol 195 (1-4) ◽  
pp. 71-77 ◽  
Author(s):  
C.J. Tay ◽  
C. Quan ◽  
S.H. Wang ◽  
H.M. Shang
Keyword(s):  
Angular Rotation ◽  
Interferometric Method ◽  
Laser Interferometric

Observation of Earth's oscillations by the laser interferometric method

2006 ◽  
Author(s):  
S. N. Bagayev ◽  
V. A. Orlov ◽  
A. V. Pyatigorets
Keyword(s):  
Interferometric Method ◽  
Laser Interferometric

scholarly journals Flaw Detection and Characterization Using Shearography

1997 ◽  
Author(s):  
Siew-Lok Toh ◽  
Fook-Siong Chau
Keyword(s):  
High Speed ◽  
Flaw Detection ◽  
Electronic Version ◽  
Interferometric Method ◽  
Full Field ◽  
Computer Image Processing ◽  
Before And After ◽  
Fringe Patterns ◽  
Laser Interferometric ◽  
High Pass

Shearography is a laser interferometric method developed originally for full field observation of surface strains of components. Since flaws usually induce strain concentrations around them, shearography can be employed to detect the flaws. Conventional shearography involves exposing high resolution films before and after the components are loaded. The exposed films are developed and then viewed via a high-pass filtering optical setup. Though the images obtained are good, this method is time-consuming. With the advent of high-speed computers, associated sophisticated imaging hardware and software, the Digital Speckle Shearing Interferometry (DSSI) method which employs a CCD (charged-coupled device) camera and computer image processing to produce the interferometric fringe patterns has been developed. In contrast with the conventional shearography, the electronic version does not require any film and is faster. The techniques are used to detect and characterise (a) flaws simulating delaminations in composites and (b) thinning in pipes.

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