NOTICE: Due to a lapse in annual appropriations, most of this website is not being updated. Learn more.
Form submissions will still be accepted but will not receive responses at this time. Sections of this site for programs using non-appropriated funds (such as NVLAP) or those that are excepted from the shutdown (such as CHIPS and NVD) will continue to be updated.
An official website of the United States government
Here’s how you know
Official websites use .gov
A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
Optical Measurements of Dynamic Absorptance during High-power Laser Spot Welding
Published
Author(s)
Brian Simonds, Jeffrey W. Sowards, Joshua A. Hadler, Boris Wilthan, Erik A. Pfeif, Jack Tanner, Chandler Harris, Paul A. Williams, John Lehman
Abstract
We present precision measurements of the time-dependent absorptance during a 10 ms fiber-laser spot weld on 316L stainless steel. From these, the precise time and energy at which a keyhole is formed can be determined.
Proceedings Title
Science and Innovations I: Light-matter Interactions and Materials Processing
Simonds, B.
, Sowards, J.
, Hadler, J.
, Wilthan, B.
, Pfeif, E.
, Tanner, J.
, Harris, C.
, Williams, P.
and Lehman, J.
(2018),
Optical Measurements of Dynamic Absorptance during High-power Laser Spot Welding, Science and Innovations I: Light-matter Interactions and Materials Processing, San Jose, CA, US, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=924931
(Accessed October 6, 2025)