title: Analysis of misalignment-induced measurement error for goniophotometry of light-emitting diode arrays.
abstract: The luminous distribution characteristics of light sources can be measured by goniophotometry. In this work, the misalignment of luminary-induced measurement errors as the main factor affecting the measurement accuracy is analyzed. A calculation method for measurement error is proposed. Then, the translational and angular misalignment-induced measurement errors are calculated and analyzed. Results show that the measurement errors induced by misalignments may be great in some cases even if the far-field condition is satisfied. For luminaries with different radiation patterns, the acceptable misalignment tolerances corresponding to measurement error of less than 1% are given.
authors: Wentao
authors: W
authors: Cai
authors: Xianming
authors: X
authors: Liu
authors: Xiaohua
authors: X
authors: Lei
authors: Weimin
authors: W
authors: Chen