The size of the melt pool created by the laser is one of the most important quality characteristic in a laser metal deposition process. This paper discusses the development of a low-cost vision system to automatically determine the size of the melt pool for in-process control. To cope with the intense infrared signal from the laser and melt pool, external ultraviolet illumination is paired with narrow bandpass filters on a usb microscope to achieve a clear image of the melt pool. The sensitivity of the melt pool to changes in system parameters and various substrate materials are also evaluated.

Meeting Name

21st Annual International Solid Freeform Fabrication Symposium -- An Additive Manufacturing Conference (2010: Aug. 9-11, Austin, TX)


Mechanical and Aerospace Engineering

Research Center/Lab(s)

Intelligent Systems Center


This research was supported by the National Science Foundation grants I IP-0637796, and I IP- 0822739. Support from Product Innovation and Engineering, LLC, Missouri ST Intelligent Systems Center, and the Missouri ST Manufacturing Engineering Program, are also greatly appreciated.

Document Type

Article - Conference proceedings

Document Version

Final Version

File Type




Publication Date

11 Aug 2010

Included in

Manufacturing Commons