Dr. Steven M. Shepard
President at Thermal Wave Imaging Inc
SPIE Involvement:
Conference Program Committee | Conference Chair | Author | Instructor
Publications (37)

Proc. SPIE. 9485, Thermosense: Thermal Infrared Applications XXXVII
KEYWORDS: Infrared cameras, Thermography, Infrared imaging, Cameras, Computing systems, Nondestructive evaluation, Interference (communication), Analytical research, Signal detection, Autoregressive models

Proc. SPIE. 8705, Thermosense: Thermal Infrared Applications XXXV
KEYWORDS: Infrared cameras, Thermography, Signal to noise ratio, Cameras, Image processing, Diffusion, Nondestructive evaluation, Interference (communication), Signal processing, Thermal modeling

Proc. SPIE. 7299, Thermosense XXXI
KEYWORDS: Infrared cameras, Thermography, Cameras, Diffusion, Nondestructive evaluation, Signal processing, Quantization, Aluminum, Infrared technology, Temperature metrology

SPIE Journal Paper | May 1, 2007
OE Vol. 46 Issue 05
KEYWORDS: Shearography, Thermography, Adhesives, Aluminum, Inspection, Nondestructive evaluation, Fringe analysis, Optical engineering, Interfaces, Cameras

SPIE Journal Paper | May 1, 2007
OE Vol. 46 Issue 05
KEYWORDS: Thermography, Inspection, Diffusion, Interfaces, Nondestructive evaluation, Optical engineering, Manufacturing, Thermal modeling, Signal processing, Visualization

Proc. SPIE. 6205, Thermosense XXVIII
KEYWORDS: Infrared cameras, Thermography, Data modeling, Cameras, Copper, Diffusion, Nondestructive evaluation, Image analysis, Neodymium, Thermal modeling

Showing 5 of 37 publications
Conference Committee Involvement (23)
Thermosense: Thermal Infrared Applications XLI
14 April 2019 | Baltimore, Maryland, United States
Thermosense: Thermal Infrared Applications XL
16 April 2018 | Orlando, Florida, United States
Thermosense: Thermal Infrared Applications XXXIX
11 April 2017 | Anaheim, California, United States
Thermosense: Thermal Infrared Applications XXXVIII
18 April 2016 | Baltimore, Maryland, United States
Thermosense: Thermal Infrared Applications XXXVII
20 April 2015 | Baltimore, Maryland, United States
Showing 5 of 23 published special sections
Course Instructor
SC786: Practical Thermography for Nondestructive Testing
This course will provide a basic understanding of the principles and capabilities of modern systems for Thermographic Nondestructive Testing (TNDT). TNDT is widely used to detect and evaluate a range of sub-surface defects including voids, delaminations, inclusions, porosity and corrosion. The course concentrates on clarifying the fundamental physical limitations that apply to all thermographic methods, and then showing how various approaches to excitation, acquisition, instrumentation and analysis can be used to reach and even exceed those limits. Examples of TNDT for metals, composites and ceramics will be presented and discussed. Approaches including flash, step, modulated, lock-in and sonic TNDT will be covered.
SC185: Transient Thermographic NDE
Transient infrared (IR) thermography is a powerful method of nondestructive testing (NDT) used by the aerospace industry. This short course provides an overview of fundamentals of NDT (TNDT) including cutting-edge test technologies and data-processing algorithms. A review of the properties of a subsurface defect and its host material are presented. Differences of using pulsed and harmonic wave thermal excitation are discussed. TNDT techniques are described and applied by creating defect maps. The course includes demonstrations of two-and three-dimensional thermal models that also illustrate their limits. Examples relate to composite and layered structures used in the aerospace industry, although the same principles apply to most structures. Special attention will be paid to standard and advanced data processing that provides a better reliability of defect detection.
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