Mr. Eric Miller Profile

Eric Miller

SPIE Involvement:

Author

Publications (1)

This will count as one of your downloads.

You will have access to both the presentation and article (if available).

DOWNLOAD NOW

This content is available for download via your institution's subscription. To access this item, please sign in to your personal account.

Email or Username Forgot your username?

Password Forgot your password?

Show

Keep me signed in

No SPIE account? Create an account

Proceedings Article | 7 June 2024 Presentation + Paper

Flash energy and duration issues in active thermography

Steven Shepard, James Lhota, Tasdiq Ahmed, Eric Miller, Duy Tran

Proceedings Volume 13047, 1304712 (2024) https://doi.org/10.1117/12.3014434

KEYWORDS: Infrared cameras, Cameras, Thermography, Reflection, Infrared imaging, Aluminum, Power supplies, Visible radiation, Photodiodes, Metals

Read Abstract +

Since its introduction in the 1980s, the field of Flash Thermography for Nondestructive Testing (FTNDT) has benefited from enormous advances in the underlying IR camera and computer technologies that enable it, while the flash excitation component has remained essentially unchanged. A typical FTNDT setup comprises a pair of helical or U-shaped xenon flashlamps designed for use in commercial photography, each powered by a bank of capacitors under computer control. A single flashlamp-power supply unit is often described as 4-6 kJ of energy with duration 2-3 msec, the Full Width Half Maximum (FWHM) duration of the flash. However, saturation of the IR camera detector may persist considerably longer due to the extended tail of the flash pulse. In high thermal diffusivity materials, the presence of saturation may mask features of interest, and limit access to early onset signals normally used for depth measurement of subsurface features. Saturation may be mitigated to some degree, but not entirely, by reducing flash energy (power supply voltage). However, more effective elimination of saturation is accomplished using a dedicated hardware device to truncate the duration of the flash pulse. In this paper, we compare the effect of varying flash energy by adjustment of power supply voltage and flash duration on detection of near surface features in an aluminum plate.

My Library

You currently do not have any folders to save your paper to! Create a new folder below.

Folder Name

Folder Description

View contact details

UPDATE YOUR PROFILE

Is this your profile? Update it now.

Sign into your SPIE.org account

Don’t have a profile and want one?

Create an account on SPIE.org

Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks. You are receiving this notice because your organization may not have SPIE eBooks access.*

*Shibboleth/Open Athens users─please sign in to access your institution's subscriptions.

To obtain this item, you may purchase the complete book in print or electronic format on SPIE.org.

ORGANIZATIONAL
Sign in with credentials provided by your organization.

Organizational Username

Organizational Password

Show/Hide Password

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members:

Non-members: ADD TO CART

Keywords/Phrases

Search In:

Publication Years