A Y-shaped fiber reflection probe combined with a spectrometer estimates film thickness from adjacent interference peaks, with reported errors around 5% on 25 to 100 micrometer polymer films.
The main hardware is divided into three parts: a light sou rce, a Y -type optical fiber with a probe, and a spectrometer
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Film Thickness Gauge Based on Interferometric Principle of Y-shaped Optical Fiber
A Y-shaped fiber reflection probe combined with a spectrometer estimates film thickness from adjacent interference peaks, with reported errors around 5% on 25 to 100 micrometer polymer films.