Abstract
In this paper we suggest a new optical technique, moire deflectometry, for V-T relaxation rate studies in gases. By using this technique we map the thermal lens induced by absorption of an infrared laser radiation. We have shown that the thermal lens is significantly broader compared to the pump beam profile. We also show that measurement far from the beam axis provides a better bound to the relaxation time than an on-axis measurement.
© 1984 Optical Society of America
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