Improving lock-in thermography detection of microgaps located at the tooth-filling interface using a phase versus amplitude image signal extraction approach

Measurement ◽  
2017 ◽  
Vol 104 ◽  
pp. 21-28 ◽  
Author(s):  
M. Streza ◽  
B. Belean ◽  
I. Hodisan ◽  
C. Prejmerean
Keyword(s):  
Signal Extraction ◽  
Amplitude Image ◽  
Phase Versus ◽  
Versus Amplitude ◽  
Lock In

Fault Isolation of Metal-Insulator-Metal (MiM) Capacitor Failures by Lock-in Thermography (LIT)

2020 ◽  
Author(s):  
Ke-Ying Lin ◽  
Pei-Fen Lue ◽  
Jayce Liu ◽  
Paul Kenneth Ang
Keyword(s):  
Fault Isolation ◽  
Phase Image ◽  
Metal Insulator ◽  
Amplitude Image ◽  
Metal Insulator Metal ◽  
Defect Localization ◽  
Lock In

Abstract The paper demonstrates accurate fault isolation information of metal-insulator-metal (MiM) capacitor failures by lock-in thermograph (LIT). In this study, a phase image spot location at a lock-in frequency larger than 5 Hz gives more accurate defect localization than an LIT amplitude image or OBIRCH to determine the next FA steps.

scholarly journals Phase versus amplitude sorting of 4D-CT data

2006 ◽  
Vol 7 (1) ◽  
pp. 77-85 ◽  
Author(s):  
Nicole Wink ◽  
Christoph Panknin ◽  
Timothy D. Solberg
Keyword(s):  
4D Ct ◽  
Phase Versus ◽  
Ct Data ◽  
Versus Amplitude

Selection of a LGp0-shaped fundamental mode in a laser cavity: Phase versus amplitude masks

2012 ◽  
Vol 285 (24) ◽  
pp. 5268-5275 ◽  
Author(s):  
Abdelkrim Hasnaoui ◽  
Thomas Godin ◽  
Emmanuel Cagniot ◽  
Michael Fromager ◽  
Andrew Forbes ◽  
...  
Keyword(s):  
Fundamental Mode ◽  
Laser Cavity ◽  
Phase Versus ◽  
Versus Amplitude ◽  
Selection Of

11 Phase versus amplitude-gated therapy for lung SBRT with regular breathing patterns

2019 ◽  
Vol 68 ◽  
pp. 7
Author(s):  
M. Savanović ◽  
D. Jaroš ◽  
F. Huguet ◽  
J.N. Foulquier
Keyword(s):  
Breathing Patterns ◽  
Phase Versus ◽  
Lung Sbrt ◽  
Versus Amplitude

scholarly journals Phase versus amplitude sorting of 4D-CT data

2006 ◽  
Vol 7 (1) ◽  
pp. 77-85 ◽  
Author(s):  
Nicole M. Wink ◽  
Christoph Panknin ◽  
Timothy D. Solberg
Keyword(s):  
4D Ct ◽  
Phase Versus ◽  
Ct Data ◽  
Versus Amplitude

Lock-in Infrared Thermography for the Non-Destructive Testing of Fatigue Specimen with Defects

2010 ◽  
Vol 44-47 ◽  
pp. 576-580
Author(s):  
Yan Guang Zhao ◽  
Xing Lin Guo ◽  
Ming Fa Ren
Keyword(s):  
Infrared Thermography ◽  
Phase Image ◽  
Non Destructive Testing ◽  
Destructive Testing ◽  
Amplitude Image ◽  
Fatigue Specimen ◽  
Testing Frequency ◽  
Lock In ◽  
Non Destructive ◽  
Precise Testing

Lock-in infrared thermography method was gradually being used in fatigue studies because of its advantages such as real-time, quick-reaction, non-contact, non-destructive and so on. In this paper, non-destructive testing was applied to fatigue specimen with defects, based on lock-in infrared thermography. In parallel, the result was analyzed by using lock-in infrared thermography system developed by Cedip in French. The results show that more information of internal detects can be found from phase image than that from amplitude image. The experiment procedure indicated that a proper testing frequency was the key to the non-destructive testing. The data revealed that deeper depth and larger area of defect led to a precise testing result.

Bonafide Substructure in the Core of Ferritin

1985 ◽  
Vol 43 ◽  
pp. 322-323
Author(s):  
William H. Massover
Keyword(s):  
Phase Contrast ◽  
Central Cavity ◽  
Amplitude Image ◽  
Ultrastructural Studies ◽  
The Core ◽  
Hydrated Ferric Oxide ◽  
Imaging Artifact ◽  
Contrast Image ◽  
Protein Shell ◽  
Regular Patterns

Each molecule of ferritin (d = 130Å) contains a core of iron surrounded by a 24-subunit protein shell. The amount of iron stored is variable and is present within the central cavity (d = 80Å) as a hydrated ferric oxide equivalent to the mineral, ferrihydrite. Many early ultrastructural studies of ferritin detected regular patterns of a multiparticulate substructure in the iron-rich core [e.g., 3,4], Each small particle was termed a “micelle“; a theory became widely accepted that a core consisted of up to six micelles positioned at the vertices of an octahedron. Other workers recognized that the apparent micelles were smaller or even disappeared if images were recorded closer to exact focus [e.g., 5]. In 1969, Haydon clearly established that the observed substructure was really an imaging artifact; each apparent micelle was only a dot in the underfocused phase contrast image of the supporting film superimposed on the amplitude image of the strongly scattering metal.

Amplitude-Modulated Lock-In Vibrothermography for NDE of Polymers and Composites

1995 ◽  
Vol 7 (1) ◽  
pp. 215-228 ◽  
Author(s):  
J. Rantala ◽  
D. Wu ◽  
G. Busse
Keyword(s):  
Lock In
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