Analytical calculation of the light-collection efficiency of an optical emission spectrometer with the effective solid-angle method

Minwook Kang, Jae W. Hahn

Research output: Contribution to journalArticle

3 Citations (Scopus)


A method is proposed for calculating the optical emission spectrometer (OES) light-collection efficiency using the effective solid angle from an arbitrary point source. Based on the point source-OES relative positioning, the effective solid angle is derived for four cases: (1) on axis and on the object plane; (2) on axis and outside the object plane; (3) off axis and on the object plane; and (4) off axis and outside the object plane. The results were in good agreement with those obtained through Monte Carlo ray tracing. After calculating the OES geometrical collection efficiency with respect to the object plane distance in three different-sized cylindrical volume sources, we suggest a simple strategy to increase this efficiency in plasma process monitoring.

Original languageEnglish
Pages (from-to)3909-3914
Number of pages6
JournalApplied Optics
Issue number15
Publication statusPublished - 2016 May 20


All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics
  • Engineering (miscellaneous)
  • Electrical and Electronic Engineering

Cite this