Patent ID: 8004677

Claim:
An ellipsometer, comprising: a light source; a light source part module provided with a polarizer for polarizing light emitted from the light source; a beam splitter for splitting the light polarized by the light source part module; an objective lens for permitting some part of the light split by the beam splitter to pass through and to be convergently irradiated to a sample; a light receiving part module provided with a polarizer for elliptic polarizing the light reflected on the sample and receiving the light which is reflected on the sample and passed through the objective lens and the beam splitter; an optical detector for detecting the light received to the light receiving part module with a plurality of pixels; and a processing device for obtaining light intensities for multiple incidence surfaces of 360° measured in a static state by the pixels, each of which has a different azimuth angle, on a same circumference having a radius of r and calculating ellipsometric angles (ψ, Δ) from the light intensities.