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High Speed Imaging and Analysis of Jet and Drop Formation

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New techniques have been developed for analyzing, in detail, the shape and development of ink jets and drops. By using flash illumination of very short duration (ca. 20 ns), high quality, single-event digital images of jets and drops can be captured. A computer program, PEJET, has been written to automate the processing of such images and to generate quantitative data about the whole ink stream. From this data, it is then possible to compute the variation in fluid volume, volume flow, and velocity as a function of both position and time. The method has been shown to have high accuracy. The results can be used to study the influences of nozzle design, drive waveform, and fluid properties on jet and drop formation, as well as to provide accurate data for comparison to the results of computational modeling. Examples of results from a drop-on-demand system are presented that illustrate the potential of the method to compare quantitatively the performance of print systems and inks.

Document Type: Research Article


Affiliations: Inkjet Research Centre, Institute for Manufacturing, Department of Engineering, University of Cambridge, Mill Lane, Cambridge CB2 1RX, United Kingdom

Publication date: September 1, 2007

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  • The Journal of Imaging Science and Technology (JIST) is dedicated to the advancement of imaging science knowledge, the practical applications of such knowledge, and how imaging science relates to other fields of study. The pages of this journal are open to reports of new theoretical or experimental results, and to comprehensive reviews. Only original manuscripts that have not been previously published, nor currently submitted for publication elsewhere, should be submitted.

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