Ratiometric spatial frequency modulation imaging for monitoring temperature in laser powder bed fusion

Scott Hunter; Adriana Eres-Castellanos; Jonah Klemm-Toole; Amy Clarke; Daniel E. Adams; Randy A. Bartels; Jeff Squier

doi:10.1117/12.3001954

13 March 2024 Ratiometric spatial frequency modulation imaging for monitoring temperature in laser powder bed fusion

Scott Hunter, Adriana Eres-Castellanos, Jonah Klemm-Toole, Amy Clarke, Daniel E. Adams, Randy A. Bartels, Jeff Squier

Proceedings Volume PC12876, Laser 3D Manufacturing XI; PC128760C (2024) https://doi.org/10.1117/12.3001954
Event: SPIE LASE, 2024, San Francisco, California, United States

Abstract

Photodiodes are commonly used in Laser Powder Bed Fusion (LPBF) for process monitoring. However, they spatially average out features within the melt pool. We introduce Spatial Frequency Modulation Imaging (SPIFI), a technique enabling 1D spatially resolved imaging with photodiodes. SPIFI can produce high-resolution images using blackbody radiation or coherent illumination. In LPBF monitoring, we use three photodiodes at different wavelengths (780, 920, and 1070 nm) to obtain 1D SPIFI images of the melt pool temperature and reflected fusing beam. Our experimental results aim to benchmark LPBF physics models for accurate melt process simulations and serve as an in-situ process diagnostic.

Conference Presentation

Citation Download Citation

Scott Hunter, Adriana Eres-Castellanos, Jonah Klemm-Toole, Amy Clarke, Daniel E. Adams, Randy A. Bartels, and Jeff Squier "Ratiometric spatial frequency modulation imaging for monitoring temperature in laser powder bed fusion", Proc. SPIE PC12876, Laser 3D Manufacturing XI, PC128760C (13 March 2024); https://doi.org/10.1117/12.3001954

ACCESS THE FULL ARTICLE

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