Abstract

Abstract Using experimental method based on a quarter-wave Senarmont compensator the temperature function of birefringence, n2 - n1, has been measured in fluorene crystal, C13H10. In the interval of 25 to 90 centigrades the birefringence linearly diminishes with an increase of temperature. It has been pointed out that for an exact knowledge of temperature behavior of birefringence the thermal expansion across the investigated plate must be taken into account.

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