Patent ID: 8830463

Claim:
An ellipsometer, comprising: a light source emitting white light to a sample; an achromatic aberration collimator disposed between the light source and the sample stage on a progress path of light and forming the white light emitted from the light source into parallel light; a first polarizer disposed between the achromatic aberration collimator and the sample stage on the progress path of light and receiving the parallel light and polarizing the parallel light; a sample stage supporting the sample; a second polarizer disposed at the front or rear of the sample and rotating at constant velocity for polarizing the incident light; a third polarizer disposed at the rear of the sample and polarizing the incident light; an achromatic aberration optical focus system receiving the light transmitting the third polarizer and intensively irradiating the incident light to a local region of a multichannel spectrometer; and a multichannel spectrometer receiving the light transferred by the achromatic aberration optical focus system, separating the incident light for each wavelength using the dispersion optical system, irradiating the light separated for each wavelength to the multichannel photometric detector, and measuring the exposure of light irradiated to the multichannel photometric detector for each pixel of the multichannel photometric detector, whereby properties of the sample are measured.