A New Standard of Spectral Irradiance

Stair, R.; Schneider, William E.; Jackson, John K.

doi:10.1364/ao.2.001151

Cited by 241 publications

(43 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…A removable mirror in the violet fluorescence path allows light from a calibrated tungsten-halogen white light source to be trans- mitted through the heat-pipe oven to the monochromator, to calibrate the relative detection system efficiency versus wavelength (18). Since the fluorescence is partially polarized, the polarization dependence of the detection system efficiency must be taken into account (19).…”

Section: Methodsmentioning

confidence: 99%

Experimental Study of the NaK 31Π State

Laub

Mazsa

Webb

et al. 1999

Journal of Molecular Spectroscopy

View full text Add to dashboard Cite

Section: Methodsmentioning

confidence: 99%

Experimental Study of the NaK 31Π State

Laub

Mazsa

Webb

et al. 1999

Journal of Molecular Spectroscopy

View full text Add to dashboard Cite

“…After all these considerations, high-power, quartz halogen (gas filled) tungsten coiled-coil standards of spectral irradiance 69,70 appear to be the most practical alternative to largecalibrated-area ribbon lamps for calibration of pyrometers above about 3000 K. The high operating temperature (3200 K vs. 2800 K for tungsten ribbon lamps) and high electric power (typically 200-1000 W vs. 75-100 W) make these lamps the brightest steady large-area sources of white light available (see Ref…”

Section: Continuous Laboratory Sourcesmentioning

confidence: 99%

Contributed Review: Absolute spectral radiance calibration of fiber-optic shock-temperature pyrometers using a coiled-coil irradiance standard lamp

Fat’yanov

Asimow

2015

Review of Scientific Instruments

View full text Add to dashboard Cite

Development of a fast fiber-optic two-color pyrometer for the temperature measurement of surfaces with varying emissivities Rev. Sci. Instrum. 72, 3366 (2001); 10.1063/1.1384448 This article is copyrighted as indicated in the article. Reuse of AIP content is subject to the terms at: http://scitationnew. We describe an accurate and precise calibration procedure for multichannel optical pyrometers such as the 6-channel, 3-ns temporal resolution instrument used in the Caltech experimental geophysics laboratory. We begin with a review of calibration sources for shock temperatures in the 3000-30 000 K range. High-power, coiled tungsten halogen standards of spectral irradiance appear to be the only practical alternative to NIST-traceable tungsten ribbon lamps, which are no longer available with large enough calibrated area. However, non-uniform radiance complicates the use of such coiled lamps for reliable and reproducible calibration of pyrometers that employ imaging or relay optics. Careful analysis of documented methods of shock pyrometer calibration to coiled irradiance standard lamps shows that only one technique, not directly applicable in our case, is free of major radiometric errors. We provide a detailed description of the modified Caltech pyrometer instrument and a procedure for its absolute spectral radiance calibration, accurate to ±5%. We employ a designated central area of a 0.7× demagnified image of a coiled-coil tungsten halogen lamp filament, cross-calibrated against a NIST-traceable tungsten ribbon lamp. We give the results of the cross-calibration along with descriptions of the optical arrangement, data acquisition, and processing. We describe a procedure to characterize the difference between the static and dynamic response of amplified photodetectors, allowing time-dependent photodiode correction factors for spectral radiance histories from shock experiments. We validate correct operation of the modified Caltech pyrometer with actual shock temperature experiments on single-crystal NaCl and MgO and obtain very good agreement with the literature data for these substances. We conclude with a summary of the most essential requirements for error-free calibration of a fiber-optic shock-temperature pyrometer using a high-power coiled tungsten halogen irradiance standard lamp. C 2015 AIP Publishing LLC.[http://dx

show abstract

“…This spectroradiometer/camera system was calibrated using a standard source of spectral irradiance (200 Watt, 6.6 Amp., Quartz-lodine tungsten filament lamp, Stair et al, 1963). The accuracy of the wavelength scale of the continuous filter was verified using a didymium filter (transmission peaks at 410,450,490,520,550 and 620 nm, Wyszecki & Stiles, 1967), as well as four narrow band interference filters (420, 500, 560 and 600 nm).…”

Section: Lightmentioning

confidence: 99%

Seasonal changes in the underwater light climate of two Canadian shield lakes

Heinermann

Ali

1988

Hydrobiologia

View full text Add to dashboard Cite

This study examines the seasonal variation in the underwater spectral distribution of light in a mesotrophic (Lake Cromwell) and an oligo-mesotrophic (Lake Croche) temperate lake. Gilvin is primarily responsible for the strong selective attenuation of blue light in both lakes. As a result of differing gilvin concentrations light transmission maxima of downwelling and upwelling spectra are near 615 nm in Lake Cromwell and 599nm in Lake Croche. With increases in depth both upwelling and downwelling radiance fluxes decrease, are shifted to longer wavelengths and become more monochromatic. The greatest penetration of light occurs in the summer and spring after which a gradual decrease occurs through fall to a minimum value in winter. Under the winter cover the AP,, of downwelling light shifts 10 to 20 nm towards shorter wavelengths. Seasonal changes in downwelling irradiance are related to solar altitude, concentration of suspended particles, phytoplankton populations, amount of gdvin, mixing and winter cover. The brownish colouration of these lakes is explained by reflectance of spectrally impure orangish-red light.

show abstract

A New Standard of Spectral Irradiance

Cited by 241 publications

References 18 publications

Experimental Study of the NaK 31Π State

Experimental Study of the NaK 31Π State

Contributed Review: Absolute spectral radiance calibration of fiber-optic shock-temperature pyrometers using a coiled-coil irradiance standard lamp

Seasonal changes in the underwater light climate of two Canadian shield lakes

Contact Info

Product

Resources

About