Application of Laser Hologram Interferometry to the Distortion Determination of Sugar-Coated Tablets

Abstract

Sugar-Coated tablets of different core materials were prepared and the degree of distortion of the sugar coat was determined by the laser holographic interferometry of double exposure method. It was found that, as the degree of expansion of the tablet core material increased, the sugar coat became more distorted. By the present method, nondestructive measurement of a minute amount of distortion is possible and thus superior to conventional methods.