Controlling Penetration Depth in Projection Stereolithography by Adjusting the Operation Wavelength

Abstract:

In projection stereolithography, the cure depth and thereby the layer thickness in the manufacturing process may be varied by changing the operation wavelength. The change can be made even in the middle of the manufacturing process, which opens up possibilities for additional flexibility and speed-up of the process.In this paper, we investigate how the penetration depth of the curing light in the resin depends on the wavelength. The measurements were performed for wavelengths between 400 nm and 550 nm using a standard commercial resin. The penetration depth was found to almost double when moving from the short wavelengths to the long ones.

• Periodical: Key Engineering Materials (Volumes 611-612)
• Pages: 756-762
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.611-612.756
• Online since: May 2014
• Authors: Pekka Lehtinen*, Santeri Laurila, Matti Kaivola, Jouni Partanen
• Keywords: Layer Thickness, Penetration Depth, Projection Stereolithography, Resin, Stereolithography

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