Patent ID: 10871396

Abstract:
An optical emission spectroscopy (OES) calibration system includes a chamber, an adapter, an OES device, a calibration device, and a spectrometer. The chamber includes a viewport. The adapter is fastened to the viewport, and includes a first beam splitter and a second beam splitter. The OES device detects plasma light generated in the chamber and transmitted through the adapter and generates OES data based on the detected plasma light. The calibration device includes a light source, and generates correction data for compensating for deviations in the OES data. The spectrometer detects light emitted from the light source and split by the first beam splitter or the second beam splitter. Each of the OES device, the calibration device, and the spectrometer is fastened to the adapter through an optical cable, and the calibration device generates the correction data using an intensity of light detected by the spectrometer.