Measurement of Luminous Intensity by the Self-calibration Technique

Abstract

This paper is concerned with a new method for measuring luminous intensity of a tungsten incandescent lamp. Absolute spectral sensitivity of a silicon photodiode was determined by the self-calibration technique developed by the NBS, and a V (λ) Correction filter and a diaphragm of known opening area combined with this photodiode were used for the photometer.
Uncertainty of the measurement was estimated to be about 1%, and this method was considered to be a satisfactory practical method for the luminous intensity measurement without using a photometric standard source.