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Proceedings Article

Optical characterization of diffuser-input standard irradiance meters

[+] Author Affiliations
George P. Eppeldauer, Thomas C. Larason

National Institute of Standards and Technology (USA)

Miklos Racz

National Institute of Standards and Technology (Hungary)

Proc. SPIE 3573, OPTIKA '98: 5th Congress on Modern Optics, 220 (August 19, 1998); doi:10.1117/12.321015
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From Conference Volume 3573

  • OPTIKA '98: 5th Congress on Modern Optics
  • Gyorgy Akos; Gabor Lupkovics; Andras Podmaniczky
  • Budapest, Hungary | September 14, 1998

abstract

Standards quality irradiance meters have been developed at the National Institute of Standards and Technology to realize a detector based spectral irradiance scale. The design criteria and the optical and radiometric characterization of diffuser-input irradiance meters are discussed. The input geometry optimization is described for a broad-band InGaAs irradiance meter when measuring a 2856 K incandescent light source. The directional responsivity of the fabricated InGaAs and Si irradiance meters matches the cosine function with a maximum deviation of 0.15% within a 12 degree(s) field-of-view. Irradiance from sources of different sizes (incident beams with different f/numbers) can be measured over a wavelength range of 350 nm to 1800 nm.

© (1998) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
Citation

George P. Eppeldauer ; Miklos Racz and Thomas C. Larason
"Optical characterization of diffuser-input standard irradiance meters", Proc. SPIE 3573, OPTIKA '98: 5th Congress on Modern Optics, 220 (August 19, 1998); doi:10.1117/12.321015; http://dx.doi.org/10.1117/12.321015


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