Memorandum on a Procedure for Obtaining Spectral Radiant Intensities of Tungsten-Filament Lamps, 400–700 mμ

Barbrow, Louis E

doi:10.1364/josa.49.001122

Cited by 17 publications

(5 citation statements)

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“…Since the laser wavelength, 694.3 nm, lies in the visible region a check on the irradiance values of the standard lamps was possible through a measurement of luminous intensity and color temperature. [4] The irradiance values thus obtained checked those obtained directly within l/27» and 3% for the two lamps.…”

Section: Discussion Of Possible Sources Of Errorsupporting

confidence: 66%

Radiometric methods for measuring laser output

McSparron¹

1967

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Section: Discussion Of Possible Sources Of Errorsupporting

confidence: 66%

Radiometric methods for measuring laser output

McSparron¹

1967

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“…There will be some difference between the blackbody results quoted here and those given previously by Barbrow (1959), because of the changes in c1 and CZ.…”

Section: Notescontrasting

confidence: 76%

Standard spectral power distributions

Jones

1970

J. Phys. D: Appl. Phys.

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A tungsten lamp of known colour temperature and intensity may conveniently be used as a standard of spectral power distribution. This paper describes a method of calculating absolute values of spectral radiant intensity using the two known parameters. The tables, which are based on De Vos' values for the emissivity of tungsten, list the spectral radiant intensity per candela Q(A) for both tungsten and blackbody sources in pW sr-1 cd-1 AA-1 for a 10 nm wavelength interval.Specimen tables are reproduced for the three temperatures 2043.2,2700 and 2855.54 K. Q(A) is given at 10 nm intervals over the range 240 to 830 nm and at wider intervals to 2600nm. The accuracy attainable by this method is about rtl% at the centre of the visible spectrum.

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“…The accuracy of correction of emission spectra is largely determined by the accuracy of the initial calibration data, the precision with which the function generator reproduces this data and the accuracy of the analogue multiplier used. The accuracy of the tungsten emissivity data has been found to be approximately 5% (Barbrow, 1959). The function generator is readily programmed to an accuracy better than 01% and the analogue multiplier has an accuracy better than 0.6% over the range of input voltages employed.…”

Section: S U M M a R Ymentioning

confidence: 99%