Share Email Print
cover

Proceedings Paper

Integrating sphere as an absorption chamber for spectroscopy
Author(s): Robert J. Nordstrom
Format Member Price Non-Member Price
PDF $14.40 $18.00
cover GOOD NEWS! Your organization subscribes to the SPIE Digital Library. You may be able to download this paper for free. Check Access

Paper Abstract

An integrating sphere is a cavity with high-reflectivity walls, used primarily in precision photometric and reflectance measurements. In addition, it is used to make accurate optical power measurements and to smooth spatial variations in optical beams, by performing the integration of power over the cross-section of the beam. This paper considers the integrating sphere as the containment cavity, in which absorption spectroscopy of uniformly distributed samples is performed. A theoretical presentation of the optical properties of the integrating sphere is made, which leads to an expression for optical transmittance of the sample. This expression is different from the traditional exponential expression of transmittance of Beer-Lambert. The features of this new expression are explored for exploitation in sensitive absorption measurements.

Paper Details

Date Published: 26 February 1999
PDF: 13 pages
Proc. SPIE 3537, Electro-Optic, Integrated Optic, and Electronic Technologies for Online Chemical Process Monitoring, (26 February 1999); doi: 10.1117/12.341022
Show Author Affiliations
Robert J. Nordstrom, MediSpectra, Inc. (United States)


Published in SPIE Proceedings Vol. 3537:
Electro-Optic, Integrated Optic, and Electronic Technologies for Online Chemical Process Monitoring
Mahmoud Fallahi; Mahmoud Fallahi; Robert J. Nordstrom; Terry R. Todd, Editor(s)

© SPIE. Terms of Use
Back to Top