ミュラー行列偏光計の向上法

This research work is on the enhancement of Mueller matrix polarimeter.The enhancement is achieved in two aspects-i) enhancement of accuracy and ii) enhancement of time.In the first method, enhancement of accuracy is obtained by calibration of the errors due to non-ideal retarders of a dual rotating retarder Mueller matrix polarimeter.The dual rotating retarder polarimeter was proposed initially by Azzam.It is composed of two rotating retarders and two fixed polarizers with the final purpose of retrieving the Mueller matrix of a sample.As the Algorithm used for calibration of the retardation and the azimuthal errors already exist, we propose to take into account the diattenuation errors of the two retarders along with the retardance errors.When the retarders of a dual rotating retarder polarimeter rotate at a rate of 5:1, we can obtain the 25 coefficients by Fourier transform of the output signal.From this Fourier coefficient, the Mueller matrix of the sample can be obtained.The calibration for the retardance and diattenuation errors has been done by no sample experiment method.As the Mueller matrix of air is known, the value of the retardance and diattenuation can be retrieved from the Fourier coefficients of the output signal.The algorithm has been described and the accuracy of the method has been tested with supporting experimental results and then compared with other existing method also.In