Measurement of opaque coating thickness using photothermal radiometry

S. J. Sheard, Michael Geoffrey Somekh

Research output: Journal article publicationJournal articleAcademic researchpeer-review

2 Citations (Scopus)


We describe a method for determination of film thickness using the photothermal radiometric microscope. The method is noncontacting and nondestructive, and is applicable to coatings covering the entire surface of the material. The frequency variation of both the amplitude and phase of the thermal wave response is used to determine the film thickness. This gives two independent measures. The technique is valid regardless of the properties of the substrate material, but is more accurate when these differ substantially from those of the coating.
Original languageEnglish
Pages (from-to)2715-2716
Number of pages2
JournalApplied Physics Letters
Issue number26
Publication statusPublished - 1 Dec 1988
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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