Comparative study of integrating cavity absorption meters

János Erostyák, Tamás Jávorfi, Andrea Buzády, K. Razi Naqvi, Gyozo Garab

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Integrating spheres (IS) are widely used for recording spectra of scattering samples by placing the specimen inside or outside the sphere. An unusual application of integrating spheres has been also demonstrated earlier where the liquid sample completely filled the spherical cavity; such a device is often called an integrating cavity absorption meter (ICAM). In the present work, integrating cavities with different coatings are compared. The spheres were made of glass, covered by metal or white paint, and their surfaces were prepared for diffuse or specular reflectance. The spheres were evaluated by recording kinetic traces following a short light pulse with the aid of time-correlated single photon counting (TCSPC), and by recording steady-state spectra through single-photon counting (SPC) detection. The relative efficiencies of the spheres were determined by comparing the steady-state spectra. Possible reasons for differences in the performance are discussed.

Original languageEnglish
Pages (from-to)189-196
Number of pages8
JournalJournal of biochemical and biophysical methods
Volume69
Issue number1-2
DOIs
Publication statusPublished - Nov 30 2006

Keywords

  • Absorption
  • Corrected spectra
  • Integrating sphere
  • Scattering

ASJC Scopus subject areas

  • Biophysics
  • Biochemistry

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