Construction of Two-Axis Goniophotometer for Measurement of Spatial Distribution of a Light Source and Calculation of Luminous Flux

• Authors: F. Sametoglu
• Languages of publication: EN

Abstracts

EN

A two-axis goniophotometer is constructed at National Metrology Institute of Turkey (TUBITAK UME) for characterizing photometric properties of compact light sources. With the new device, total luminous flux emitted by a light source at both cap-up or cap-down mounting positions is calculated from the integration of the illuminance values E( θ, φ) measured on the goniometric spherical surface. The internal calibration of the system is performed by means of two calibrated light sources with known luminous flux values. The constructed system is also capable of measuring the luminous intensity distribution values I( θ, φ) of compact light sources. The uncertainty analyses of the luminous flux measurements as well as the internal calibration of the instrument are also presented herein.

Keywords

EN

42.15.Eq; 07.60.-j; 06.20.F-; 07.60.Dq

Discipline

• 07.60.-j: Optical instruments and equipment(see also 87.64.M- Optical microscopy in biological and medical physics; for optical sources, see 42.72.-g; see also 42.79.-e Optical elements, devices and systems; for optoelectronic devices, see 85.60.-q; for optical telescopes, see 95.55.Cs; for photometric, polarimetric, and spectroscopic equipment in astronomy, see 95.55.Qf)
• 42.15.Eq: Optical system design
• 07.60.Dq: Photometers, radiometers, and colorimeters
• 06.20.F-: Units and standards

• Journal: Acta Physica Polonica A
• Year: 2011
• Volume: 119
• Issue: 6
• Pages: 783-791

Dates

published

2011-06

received

2010-08-23

Contributors

author

F. Sametoglu

• National Metrology Institute of Turkey (TUBITAK UME), TUBITAK Gebze Yerleskesi, 41470, Gebze, Kocaeli, Turkey

References

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Identifiers

DOI

10.12693/APhysPolA.119.783