| http://www.w3.org/ns/prov#value | - Further, d and n are a thickness and a refractive index, respectively, at the measurement point before the temperature change. d'=d(1+.alpha..DELTA.T), n'=n(1+.beta..DELTA.T) (1)As shown in Equation (1), the optical path length of the measurement beam passing through the measurement point varies due to temperature change.
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