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Optics Letters

Optics Letters


  • Editor: Anthony J. Campillo
  • Vol. 32, Iss. 24 — Dec. 15, 2007
  • pp: 3534–3536

Molecular tagging thermometry for transient temperature mapping within a water droplet

De Huang and Hui Hu  »View Author Affiliations

Optics Letters, Vol. 32, Issue 24, pp. 3534-3536 (2007)

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We present the progress made in developing a molecular tagging thermometry (MTT) technique for achieving spatially and temporally resolved temperature measurements within a small water droplet over a solid surface. For MTT measurement, a pulsed laser is used to tag phosphorescent 1 - BrNp M β - CD ROH molecules premixed with water. Long-lived laser-induced phosphorescence is imaged at two successive times after the same laser excitation pulse. The temperature measurement is achieved by taking advantage of the temperature dependence of the phosphorescence lifetime, which is estimated from the intensity ratio of the acquired phosphorescence image pair. The measured transient temperature distributions can be used to quantify the unsteady heat transfer process inside convectively cooled water droplets over smooth or rough surfaces.

© 2007 Optical Society of America

OCIS Codes
(110.6820) Imaging systems : Thermal imaging
(120.6780) Instrumentation, measurement, and metrology : Temperature
(160.2540) Materials : Fluorescent and luminescent materials

ToC Category:
Instrumentation, Measurement, and Metrology

Original Manuscript: August 28, 2007
Revised Manuscript: October 22, 2007
Manuscript Accepted: November 16, 2007
Published: December 10, 2007

De Huang and Hui Hu, "Molecular tagging thermometry for transient temperature mapping within a water droplet," Opt. Lett. 32, 3534-3536 (2007)

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