Characterizing light engine uniformity and its influence on liquid crystal display based vat photopolymerization printing.

ABSTRACT: Vat photopolymerization (VP) is a rapidly growing category of additive manufacturing. As VP methods mature the expectation is that the quality of printed parts will be highly reproducible. At present, detailed characterization of the light engines used in liquid crystal display (LCD)-based VP systems is lacking and so it is unclear if they are built to sufficiently tight tolerances to meet the current and/or future needs of additive manufacturing. Herein, we map the irradiance, spectral characteristics, and optical divergence of a nominally 405 nm LCD-based VP light engine. We find that there is notable variation in all of these properties as a function of position on the light engine that cause changes in extent of polymerization and surface texture. We further demonstrate through a deriv

SUBMITTER: Caplins BW 

PROVIDER: S-EPMC9890382 | biostudies-literature | 2023 Jan

REPOSITORIES: biostudies-literature