Transmittance Measurements in the Integrating Sphere

Publication Type

Journal Article

Date Published

08/1986

LBNL Report Number

LBL-18234

Abstract

The finite-difference equation method is used to derive expressions for the directional-hemispherical transmittance as measured in the integrating sphere; and for the correction factor necessary with a one-port sphere to account for changes in the enclosure caused by substituting the open port (the standard device) for the sample. Expressions are also derived for the hemispherical reflectance, since this quantity is necessary to compute the correction factor. It is also shown that no correction factor is necessary with a two-port (comparative) sphere.

Journal

Applied Optics

Volume

25

Year of Publication

1986

Pagination

2752-2756