Development of a detector-based absolute spectral irradiance scale in the 380-900-nm spectral range.

A detector-based absolute scale for spectral irradiance in the 380-900-nm wavelength region has been developed and tested at the Helsinki University of Technology (HUT). Derivation of the scale and its use for photometric and colorimetric measurements are described. A thorough characterization of a filter radiometer, constructed from a reflection trap detector, a precision aperture, and a set of seven temperature-controlled bandpass filters, is presented. A detailed uncertainty analysis of the scale indicates a relative standard uncertainty of approximately 0.2% throughout most of the wavelength region. The standard uncertainties obtained in measurements of correlated color temperature and luminous intensity of three Osram Wi41/G tungsten-halogen lamps are 2 K and 0.3%, respectively. The spectral irradiance scale is compared with the HUT luminous intensity scale. The agreement of the results at the 0.1% level is well within the combined standard uncertainty of the two scales.

[1]  Donald A. McSparron,et al.  Spectral irradiance calibrations , 1987 .

[2]  R J Bruening.  Spectral irradiance scales based on filtered absolute silicon photodetectors. , 1987, Applied optics.

[3]  D. Nettleton,et al.  Improved Spectral Responsivity Scales at the NPL, 400 nm to 20 μm , 1993 .

[4]  Detector‐Based Calibration Method for High‐Accuracy Solar UV Measurements , 1996 .

[5]  Nigel P. Fox,et al.  A Cryogenic Radiometer for Absolute Radiometric Measurements , 1985 .

[6]  E. Palik.  Handbook of Optical Constants of Solids , 1997 .

[7]  J. M. Houston,et al.  Realization of a scale of absolute spectral response using the National Institute of Standards and Technology high-accuracy cryogenic radiometer. , 1996, Applied optics.

[8]  Timo Varpula,et al.  Optical power calibrator based on a stabilized green He-Ne laser and a cryogenic absolute radiometer , 1989 .

[9]  J B. Fowler,et al.  A Method of Realizing Spectral Irradiance Based on an Absolute Cryogenic Radiometer , 1993 .

[10]  Nigel P. Fox,et al.  Trap Detectors and their Properties , 1991 .

[11]  A Lassila,et al.  Interferometer for calibration of graduated line scales with a moving CCD camera as a line detector. , 1994, Applied optics.

[12]  A. Corróns,et al.  Absolute spectroradiometric and photometric scales based on an electrically calibrated pyroelectric radiometer. , 1981, Applied optics.

[13]  H. Ludvigsen,et al.  Optical power and transmittance measurements and their use in detector-based realization of the luminous intensity scale , 1995 .

[14]  E. Ikonen,et al.  High-accuracy spectrometer for measurement of regular spectral transmittance. , 1995, Applied optics.

[15]  Erkki Ikonen,et al.  An optical method for direct determination of the radiometric aperture area at high accuracy , 1997 .

[16]  G. Andor.  New data-reduction method in detector-based spectral-irradiance measurements , 1995 .

[17]  I. Malitson.  Interspecimen Comparison of the Refractive Index of Fused Silica , 1965 .

[18]  P. Foukal,et al.  Cryogenic absolute radiometers as laboratory irradiance standards, remote sensing detectors, and pyroheliometers. , 1990, Applied optics.

[19]  E. Ikonen,et al.  Radiometric realization of the candela with a trap detector , 1995 .

[20]  L. Boivin.  Environmental corrections in absolute radiom-etry , 1989 .

[21]  A. M. Robinson,et al.  Numerical Modelling of Short-wavelength Internal Quantum Efficiency , 1991 .

[22]  E. Krochmann,et al.  Calibration possibilities of luminous intensity and illuminance , 1993, Other Conferences.

[23]  J. Vos.  A new determination of the emissivity of tungsten ribbon , 1954 .

[24]  A. Pons,et al.  Absolute spectral irradiance scale in the 700-2400 nm spectral range. , 1990, Applied optics.

[25]  L. Boivin,et al.  Calibration of incandescent lamps for spectral irradiance by means of absolute radiometers. , 1980, Applied optics.