Abstract

A new system for absolute total diffuse transmission and reflection measurements using two integrating spheres is described; it extends the normal spectral range into the uv and ir. Furthermore, as part of the system, a unique self-calibrating technique has been incorporated. One sphere is coated with BaSO4 for use between wavelengths of 0.185 μm and 2.0 μm, and the other is coated with sulfur flowers for use between 1.5 μm and 12 μm. The BaSO4 and sulfur fulfill the diffuseness and high reflectance characteristics necessary for an integrating sphere. The feature of the system for calibration of the spheres uses goniophotometric measurements of diffuse transmission and reflection. These reflection intercalibrations are better in the visual range than a fraction of a percent (absolutely); however, transmission intercalibrations on quasi-specular samples may have absolute differences of several percent, thus requiring a goniophotometric transmission measurement as the valid determination.

© 1975 Optical Society of America

Full Article  |  PDF Article
OSA Recommended Articles
Retroreflectance measurements of photometric standards and coatings

W. G. Egan and T. Hilgeman
Appl. Opt. 15(7) 1845-1849 (1976)

Methods for quantitative infrared directional-hemispherical and diffuse reflectance measurements using an FTIR and a commercial integrating sphere

Thomas A. Blake, Timothy J. Johnson, Russell G. Tonkyn, Brenda M. Forland, Tanya L. Myers, Carolyn S. Brauer, Yin-Fong Su, Bruce E. Bernacki, Leonard Hanssen, and Gerardo Gonzalez
Appl. Opt. 57(3) 432-446 (2018)

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Figures (9)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Equations (1)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Metrics

You do not have subscription access to this journal. Article level metrics are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription