Abstract
To measuring the birefringence of the optical material used, such as a liquid crystal display or an optical disk is very important in terms of quality improvement. For example, when forming the disc, it takes extra stress, there is a case where the birefringence occurs. By this, when laser light was incident, by a change in transmitted light intensity to affect the reading of the data. So far, the birefringence measurement using various techniques have been made. However, it takes time to measure in such as a rotated polarizer method and the rotated retarder method using a stepping motor. In addition a method using an electric device has a problem such as initial cost. In this study, we aimed at the development of the birefringence measurement system corresponding to the low cost and real-time measurement using a fast rotated polarizer method.
