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Proceedings Paper

Ultrafast three-dimensional microscopy of laser photothermal imaging materials
Author(s): Hyunung Yu; F. Richard Kearney; Dana D. Dlott
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Paper Abstract

Time-resolved microscopy in a variety of configurations is used for three-dimensional imaging of laser photothermal materials used in offset lithographic computer-to-plate printing applications. Materials having an ink-repelling silicone layer and either a metallic absorbing layer or an energetic absorbing layer are studied. The energetic layers result in lower exposure thresholds when 10 microsecond and 2 microsecond duration near-IR laser pulses are used. The images explain the mechanism of threshold lowering, as a result of hot gas from the energetic layer causing the silicone layer to balloon. The expanding balloon results in less laser energy needed to produce an exposed spot.

Paper Details

Date Published: 17 March 2005
PDF: 10 pages
Proc. SPIE 5580, 26th International Congress on High-Speed Photography and Photonics, (17 March 2005); doi: 10.1117/12.586018
Show Author Affiliations
Hyunung Yu, Univ. of Illinois/Urbana-Champaign (United States)
F. Richard Kearney, Presstek, Inc. (United States)
Dana D. Dlott, Univ. of Illinois/Urbana-Champaign (United States)


Published in SPIE Proceedings Vol. 5580:
26th International Congress on High-Speed Photography and Photonics
Dennis L. Paisley; Stuart Kleinfelder; Donald R. Snyder; Brian J. Thompson, Editor(s)

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