A goniophotometer is an instrument for measuring light distribution in terms of the luminous intensity or illuminance distribution of a light source, a luminaire, a self-luminous display, or a surface by changing the position of a photometer or a goniometer at a clearly defined geometry. A typical goniophotometer usually consists of a mechanical device or robotic jib to support the luminaire to be measured and a photometer or a spectroradiometer, and allows their relative position to be changed to form a spherical locus .
By analyzing the optical data of the definite angle of spectral irradiance, the total luminous flux, spectral radiant flux, and color quantities can be obtained. Spectral radiant flux refers to the sum of all the radiant energy emitted per unit of time, by a light source over a specific range of a spectrum. Spectral radiant flux is the basis for deriving important luminaire parameters such as total luminous flux, radiant flux,...
- 1.International Commission on Illumination.: ILV: International Lighting Vocabulary. CIE S017/E: 2011, Vienna (2011)Google Scholar
- 2.International Commission on Illumination.: The Photometry and Goniophotometry of Luminaire. CIE 121:1996, Vienna (1996)Google Scholar
- 3.International Commission on Illumination.: The Measurement of Absolute Luminous Intensity distribution. CIE 70:1987, Vienna (1987)Google Scholar
- 4.Illuminating Engineering Society of North America.: Electrical and Photometric Measurements of Solid-State Lighting Products. IES LM-79-08, America (2008)Google Scholar
- 5.Chen, C.H., Pong, B.J., Jiaan, Y.D., Lin, H.L.: Lamp orientation dependence of an integrating sphere response for directional light source in luminous flux measurement. NCSLI Measure J. Meas. Sci. 8(2), 42–47 (2013)Google Scholar
- 8.Lui, T.A., Wu, G.N., Hsu, S.W., Pong, J.L., Zong, T.Y.: Optical spectrometer calibration technique based on mode-locked laser comb. Meas. Inf 154, 45–48 (2013)Google Scholar