Basj, Not cheap, but you can use a very thin, low mass phosphor paint and use it to paint a tiny spot. Then use pulsed light to measure the temperature. I've use a ceramic on a jet turbine fan blade at a rotation rate of 15000 rpm at a measurement rate of 250 sps with excellent tracking. Temp range was -250 C to +450 C with 50 mK resolution. Optical methods are fast.
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