Shortwave infrared imaging setup to study entrained air bubble dynamics in a MEMS-based piezo-acoustic inkjet printhead

Arjan Fraters*, Tim Segers, Marc van den Berg, Hans Reinten, Herman Wijshoff, Detlef Lohse, Michel Versluis

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

1 Citation (Scopus)
39 Downloads (Pure)

Abstract

Abstract: Piezo-acoustic inkjet printing is the method of choice for high-frequency and high-precision drop-on-demand inkjet printing. However, the method has its limitations due to bubble entrainment into the nozzle, leading to jetting instabilities. In this work, entrained air bubbles were visualized in a micrometer scale ink channel inside a silicon chip of a MEMS-based piezo-acoustic inkjet printhead. As silicon is semi-transparent for optical imaging with shortwave infrared (SWIR) light, a highly sensitive SWIR imaging setup was developed which exploited the optical window of silicon at 1550 nm. Infrared recordings of entrained bubbles are presented, showing rich phenomena of acoustically driven bubble dynamics inside the printhead. Graphic abstract: [Figure not available: see fulltext.].

Original languageEnglish
Article number123
JournalExperiments in fluids
Volume60
Issue number8
Early online date11 Jul 2019
DOIs
Publication statusPublished - 1 Aug 2019

Keywords

  • UT-Hybrid-D

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