Patent Document ID: 20160153894
Application ID: 14906433
Patent Flag: 0

Claim One:
1. An optical element rotation type Mueller-matrix ellipsometer comprising: a light source emitting incident light toward a sample; a polarization modifying unit disposed between the light source and the sample on a movement path of the incident light, controlling a polarization state of the incident light emitted from the light source, and including a plurality of optical elements including a constant velocity rotation optical element rotating at a constant velocity and a scanning optical element; a polarization analyzing unit receiving reflected light (or transmitted light), analyzing a change in a polarization state of the reflected light (or the transmitted light), and including a plurality of optical elements including a constant velocity rotation optical element rotating at a constant velocity and a scanning optical element, the polarization state of the reflected light (or the transmitted light) being changed from that of the incident light polarized while passing through the polarization modifying unit due to reflection (or transmission) of the sample; a photo-detector receiving the reflected light (or the transmitted light) passing through the polarization analyzing unit and measuring intensity of the received light as an electrical signal such as a voltage or a current; a calculating device measuring and storing Fourier coefficient values of a waveform of light intensity depending on a change in an azimuth angle of the constant velocity rotation optical element by the photo-detector, calculating Fourier coefficient values for an azimuth angle of the scanning optical element from the measured Fourier coefficient values depending on the change in the azimuth angle of the constant velocity rotation optical element, and calculating components of a Mueller-matrix for the sample from the calculated Fourier coefficient values for the azimuth angle of the scanning optical element; and a computer controlling the azimuth angle of the scanning optical element, storing values of the components of the Mueller-matrix calculated from the calculating device as a file, and displaying the values of the components of the Mueller-matrix on a screen.