The Experts below are selected from a list of 13674 Experts worldwide ranked by ideXlab platform
David Zimdars - One of the best experts on this subject based on the ideXlab platform.
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TIME DOMAIN TERAHERTZ Non‐Destructive Evaluation OF AEROTURBINE BLADE THERMAL BARRIER COATINGS
AIP Conference Proceedings, 2009Co-Authors: Jeffrey O. White, Greg Fichter, A. Chernovsky, Tresa M Pollock, John F. Whitaker, David ZimdarsAbstract:Time domain terahertz (TD‐THz) Non Destructive Evaluation (NDE) imaging is used to two‐dimensionally map the thickness of yttria stabilized zirconia (YSZ) thermal barrier coatings (TBC) on aircraft engine turbine blades. Indications of thermal degradation can be seen. The method is Non‐contact, rapid, and requires no special preparation of the blade.
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Time domain terahertz Non-Destructive Evaluation of aeroturbine blade thermal barrier coatings
AIP Conference Proceedings, 2009Co-Authors: Jeffrey White, D Das, Greg Fichter, A. Chernovsky, Tresa M Pollock, John F. Whitaker, David ZimdarsAbstract:Time domain terahertz (TD-THz) Non Destructive Evaluation (NDE) imaging \nis used to two-dimensionally map the thickness of yttria stabilized\nzirconia (YSZ) thermal barrier coatings (TBC) on aircraft engine turbine\nblades. Indications of thermal degradation can be seen. The method is\nNon-contact, rapid, and requires no special preparation of the blade.
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large area terahertz imaging and Non Destructive Evaluation applications
Insight, 2006Co-Authors: David Zimdars, Greg Fichter, A. Chernovsky, Jeffrey S White, G Stuk, S WilliamsonAbstract:Terahertz (THz) imaging is being adopted for Non-Destructive Evaluation (NDE) applications in aerospace and other government and industrial settings [1-3] . NASA is currently employing THz reflection NDE to examine the space shuttle external tank sprayed on foam insulation (SOFI) for voids and disbonds. Homeland security applications such as the inspection of personnel [2] , the detection of concealed explosives [2] , biological agents, chemical weapons, flammables, metallic and Non-metallic weapons, and other potentially dangerous items are the subject of active investigation. Advancement of many of these applications beyond small table top experimentation had been limited by slow imaging speed (tens of minutes or hours), small scan areas (<10 square cm) and in many cases the requirement that the sample itself be mechanically raster scanned. We report the development and applications of a high-speed large-area time domain terahertz Non-Destructive Evaluation imaging system.
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Large area terahertz imaging and Non-Destructive Evaluation applications
Insight, 2006Co-Authors: David Zimdars, Greg Fichter, A. Chernovsky, Jeffrey S White, G Stuk, Steven L. WilliamsonAbstract:Terahertz (THz) imaging is being adopted for Non-Destructive Evaluation (NDE) applications in aerospace and other government and industrial settings [1-3] . NASA is currently employing THz reflection NDE to examine the space shuttle external tank sprayed on foam insulation (SOFI) for voids and disbonds. Homeland security applications such as the inspection of personnel [2] , the detection of concealed explosives [2] , biological agents, chemical weapons, flammables, metallic and Non-metallic weapons, and other potentially dangerous items are the subject of active investigation. Advancement of many of these applications beyond small table top experimentation had been limited by slow imaging speed (tens of minutes or hours), small scan areas (
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Security and Non Destructive Evaluation application of high speed time domain terahertz imaging
2006 Conference on Lasers and Electro-Optics and 2006 Quantum Electronics and Laser Science Conference, 2006Co-Authors: David Zimdars, Greg Fichter, A. Chernovsky, Jeffrey S White, G Stuk, S WilliamsonAbstract:We report on the application of a transmission and reflection reconfigurable large area time domain terahertz imager capable of imaging 1 square meter in Lt 100 minutes at 100 pixels/sec to homeland security and Non-Destructive Evaluation.
Greg Fichter - One of the best experts on this subject based on the ideXlab platform.
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TIME DOMAIN TERAHERTZ Non‐Destructive Evaluation OF AEROTURBINE BLADE THERMAL BARRIER COATINGS
AIP Conference Proceedings, 2009Co-Authors: Jeffrey O. White, Greg Fichter, A. Chernovsky, Tresa M Pollock, John F. Whitaker, David ZimdarsAbstract:Time domain terahertz (TD‐THz) Non Destructive Evaluation (NDE) imaging is used to two‐dimensionally map the thickness of yttria stabilized zirconia (YSZ) thermal barrier coatings (TBC) on aircraft engine turbine blades. Indications of thermal degradation can be seen. The method is Non‐contact, rapid, and requires no special preparation of the blade.
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Time domain terahertz Non-Destructive Evaluation of aeroturbine blade thermal barrier coatings
AIP Conference Proceedings, 2009Co-Authors: Jeffrey White, D Das, Greg Fichter, A. Chernovsky, Tresa M Pollock, John F. Whitaker, David ZimdarsAbstract:Time domain terahertz (TD-THz) Non Destructive Evaluation (NDE) imaging \nis used to two-dimensionally map the thickness of yttria stabilized\nzirconia (YSZ) thermal barrier coatings (TBC) on aircraft engine turbine\nblades. Indications of thermal degradation can be seen. The method is\nNon-contact, rapid, and requires no special preparation of the blade.
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large area terahertz imaging and Non Destructive Evaluation applications
Insight, 2006Co-Authors: David Zimdars, Greg Fichter, A. Chernovsky, Jeffrey S White, G Stuk, S WilliamsonAbstract:Terahertz (THz) imaging is being adopted for Non-Destructive Evaluation (NDE) applications in aerospace and other government and industrial settings [1-3] . NASA is currently employing THz reflection NDE to examine the space shuttle external tank sprayed on foam insulation (SOFI) for voids and disbonds. Homeland security applications such as the inspection of personnel [2] , the detection of concealed explosives [2] , biological agents, chemical weapons, flammables, metallic and Non-metallic weapons, and other potentially dangerous items are the subject of active investigation. Advancement of many of these applications beyond small table top experimentation had been limited by slow imaging speed (tens of minutes or hours), small scan areas (<10 square cm) and in many cases the requirement that the sample itself be mechanically raster scanned. We report the development and applications of a high-speed large-area time domain terahertz Non-Destructive Evaluation imaging system.
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Large area terahertz imaging and Non-Destructive Evaluation applications
Insight, 2006Co-Authors: David Zimdars, Greg Fichter, A. Chernovsky, Jeffrey S White, G Stuk, Steven L. WilliamsonAbstract:Terahertz (THz) imaging is being adopted for Non-Destructive Evaluation (NDE) applications in aerospace and other government and industrial settings [1-3] . NASA is currently employing THz reflection NDE to examine the space shuttle external tank sprayed on foam insulation (SOFI) for voids and disbonds. Homeland security applications such as the inspection of personnel [2] , the detection of concealed explosives [2] , biological agents, chemical weapons, flammables, metallic and Non-metallic weapons, and other potentially dangerous items are the subject of active investigation. Advancement of many of these applications beyond small table top experimentation had been limited by slow imaging speed (tens of minutes or hours), small scan areas (
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Security and Non Destructive Evaluation application of high speed time domain terahertz imaging
2006 Conference on Lasers and Electro-Optics and 2006 Quantum Electronics and Laser Science Conference, 2006Co-Authors: David Zimdars, Greg Fichter, A. Chernovsky, Jeffrey S White, G Stuk, S WilliamsonAbstract:We report on the application of a transmission and reflection reconfigurable large area time domain terahertz imager capable of imaging 1 square meter in Lt 100 minutes at 100 pixels/sec to homeland security and Non-Destructive Evaluation.
A. Chernovsky - One of the best experts on this subject based on the ideXlab platform.
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TIME DOMAIN TERAHERTZ Non‐Destructive Evaluation OF AEROTURBINE BLADE THERMAL BARRIER COATINGS
AIP Conference Proceedings, 2009Co-Authors: Jeffrey O. White, Greg Fichter, A. Chernovsky, Tresa M Pollock, John F. Whitaker, David ZimdarsAbstract:Time domain terahertz (TD‐THz) Non Destructive Evaluation (NDE) imaging is used to two‐dimensionally map the thickness of yttria stabilized zirconia (YSZ) thermal barrier coatings (TBC) on aircraft engine turbine blades. Indications of thermal degradation can be seen. The method is Non‐contact, rapid, and requires no special preparation of the blade.
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Time domain terahertz Non-Destructive Evaluation of aeroturbine blade thermal barrier coatings
AIP Conference Proceedings, 2009Co-Authors: Jeffrey White, D Das, Greg Fichter, A. Chernovsky, Tresa M Pollock, John F. Whitaker, David ZimdarsAbstract:Time domain terahertz (TD-THz) Non Destructive Evaluation (NDE) imaging \nis used to two-dimensionally map the thickness of yttria stabilized\nzirconia (YSZ) thermal barrier coatings (TBC) on aircraft engine turbine\nblades. Indications of thermal degradation can be seen. The method is\nNon-contact, rapid, and requires no special preparation of the blade.
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large area terahertz imaging and Non Destructive Evaluation applications
Insight, 2006Co-Authors: David Zimdars, Greg Fichter, A. Chernovsky, Jeffrey S White, G Stuk, S WilliamsonAbstract:Terahertz (THz) imaging is being adopted for Non-Destructive Evaluation (NDE) applications in aerospace and other government and industrial settings [1-3] . NASA is currently employing THz reflection NDE to examine the space shuttle external tank sprayed on foam insulation (SOFI) for voids and disbonds. Homeland security applications such as the inspection of personnel [2] , the detection of concealed explosives [2] , biological agents, chemical weapons, flammables, metallic and Non-metallic weapons, and other potentially dangerous items are the subject of active investigation. Advancement of many of these applications beyond small table top experimentation had been limited by slow imaging speed (tens of minutes or hours), small scan areas (<10 square cm) and in many cases the requirement that the sample itself be mechanically raster scanned. We report the development and applications of a high-speed large-area time domain terahertz Non-Destructive Evaluation imaging system.
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Large area terahertz imaging and Non-Destructive Evaluation applications
Insight, 2006Co-Authors: David Zimdars, Greg Fichter, A. Chernovsky, Jeffrey S White, G Stuk, Steven L. WilliamsonAbstract:Terahertz (THz) imaging is being adopted for Non-Destructive Evaluation (NDE) applications in aerospace and other government and industrial settings [1-3] . NASA is currently employing THz reflection NDE to examine the space shuttle external tank sprayed on foam insulation (SOFI) for voids and disbonds. Homeland security applications such as the inspection of personnel [2] , the detection of concealed explosives [2] , biological agents, chemical weapons, flammables, metallic and Non-metallic weapons, and other potentially dangerous items are the subject of active investigation. Advancement of many of these applications beyond small table top experimentation had been limited by slow imaging speed (tens of minutes or hours), small scan areas (
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Security and Non Destructive Evaluation application of high speed time domain terahertz imaging
2006 Conference on Lasers and Electro-Optics and 2006 Quantum Electronics and Laser Science Conference, 2006Co-Authors: David Zimdars, Greg Fichter, A. Chernovsky, Jeffrey S White, G Stuk, S WilliamsonAbstract:We report on the application of a transmission and reflection reconfigurable large area time domain terahertz imager capable of imaging 1 square meter in Lt 100 minutes at 100 pixels/sec to homeland security and Non-Destructive Evaluation.
S Williamson - One of the best experts on this subject based on the ideXlab platform.
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large area terahertz imaging and Non Destructive Evaluation applications
Insight, 2006Co-Authors: David Zimdars, Greg Fichter, A. Chernovsky, Jeffrey S White, G Stuk, S WilliamsonAbstract:Terahertz (THz) imaging is being adopted for Non-Destructive Evaluation (NDE) applications in aerospace and other government and industrial settings [1-3] . NASA is currently employing THz reflection NDE to examine the space shuttle external tank sprayed on foam insulation (SOFI) for voids and disbonds. Homeland security applications such as the inspection of personnel [2] , the detection of concealed explosives [2] , biological agents, chemical weapons, flammables, metallic and Non-metallic weapons, and other potentially dangerous items are the subject of active investigation. Advancement of many of these applications beyond small table top experimentation had been limited by slow imaging speed (tens of minutes or hours), small scan areas (<10 square cm) and in many cases the requirement that the sample itself be mechanically raster scanned. We report the development and applications of a high-speed large-area time domain terahertz Non-Destructive Evaluation imaging system.
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Security and Non Destructive Evaluation application of high speed time domain terahertz imaging
2006 Conference on Lasers and Electro-Optics and 2006 Quantum Electronics and Laser Science Conference, 2006Co-Authors: David Zimdars, Greg Fichter, A. Chernovsky, Jeffrey S White, G Stuk, S WilliamsonAbstract:We report on the application of a transmission and reflection reconfigurable large area time domain terahertz imager capable of imaging 1 square meter in Lt 100 minutes at 100 pixels/sec to homeland security and Non-Destructive Evaluation.
Y.y. Hung - One of the best experts on this subject based on the ideXlab platform.
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Digital shearography versus TV-holography for Non-Destructive Evaluation
Optics and Lasers in Engineering, 1997Co-Authors: Y.y. HungAbstract:This paper reviews and compares two major optical methods for Non-Destructive Evaluation: digital shearography and TV-holography. Digital shearography measures surface displacement gradients whereas TV-holography measures surface displacements. Both methods reveal flaws by looking for flaw-induced deformation anomolies. While both methods enjoy the advantages of being full-field and Non-contacting, digital shearography has been proven to be more practical than TV-holography because it employs a simpler set-up and does not require special vibration isolation.
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shearography for Non Destructive Evaluation of composite structures
Optics and Lasers in Engineering, 1996Co-Authors: Y.y. HungAbstract:Recently, there has been considerable interest in the development of optical methods for Non-Destructive Evaluation of composites in a production/field environment, because of the full-field, Non-contacting and high speed nature of optical methods. Among the various optical methods, shearography is rapidly gaining acceptance by industry. Shearography is equivalent to a full-field strain gage which allows strain distribution over a large area to be observed, and it does not require installing strain gauges/transducers. The output of shearography is a fringe pattern depicting the distribution of strain. It reveals flaws in materials by looking for flaw-induced strain anomalies which are translated into anomalies in the fringe pattern. This paper reviews the state-of-the-art of shearography and its application in Non-Destructive testing of composites.
