Most recent

ANSI/IES LM-75-19

Approved Method: Guide to Goniometer Measurements and Types, and Photometric Coordinate Systems


This document provides definitions of spherical coordinate systems and goniophotometer types used to measure light sources. It does not address the use of goniophotometers to measure media or surfaces. The operating principles behind each type of goniophotometer are addressed, and a general guide to goniophotometer calibration, stray light elimination, and stray light correction is presented. A methodology for zeroing data when measuring upward light is also provided. In addition, the correspondences between relevant IES and CIE definitions are described.


CONTENT PROVIDER
Illuminating Engineering Society of North America [iesna]

Document History
We have no document history for this standard.
Included in Packages
This standard is not included in any packages.
Amendments & Corrections
We have no amendments or corrections for this standard.