PTD

photothermal deflection
(レーザー光線の)光熱偏向. 試料媒質の温度勾配またはそれによる密度勾配により光線が曲げられる現象.
photothermal deflection; the deflection of a probe-laser beam by thermal and concentration gradients in a substance; applied in absorption spectroscopy, thermal-diffusivity measurements, and imaging; <

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