Results 141 to 150 of about 7,583 (174)
Improved diffusers for solar UV spectroradiometers [PDF]
AIP Conference Proceedings, 2013 Diffuser heads whose angular response is proportional to the cosine of the zenith angle are needed for global irradiance measurements. Various material samples were measured for their transmission properties to find out the most promising material candidate for use in an improved solar UV diffuser.
Pulli, Tomi +6 more
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Calibration of a Field Spectroradiometer
Optical Engineering, 1973The processes used to calibrate a field spectroradiometer are described. The spectro-radiometer uses four CVF's and four detectors with two of each in two separate instruments. Wavelength calibration procedure was to illuminate the aperture of the spectroradiometer with energy containing spectral lines at known wavelengths, and to note the linearity of
Anthony J. La Rocca, Ross W. Leamer
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Journal of Physics E: Scientific Instruments, 1968
An instrument is described by which the absolute spectral power distribution of light sources can be displayed directly on a pen-recorder. It is based on a grating monochromator which is motor driven at a scanning rate of 100 nm min−1, and the variation with wavelength of the overall instrument response is automatically compensated by an electrical ...
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An instrument is described by which the absolute spectral power distribution of light sources can be displayed directly on a pen-recorder. It is based on a grating monochromator which is motor driven at a scanning rate of 100 nm min−1, and the variation with wavelength of the overall instrument response is automatically compensated by an electrical ...
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A Recording Photoelectric Spectroradiometer
Journal of the Optical Society of America, 1938A recording spectroradiometer has been constructed for use in absorption spectra measurements in the visible and near infra-red regions. A Hilger quartz monochromator and an emission type photoelectric cell are used. The photoelectric cell current is amplified by a d.c.
V. M. Albers, H. V. Knorr
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A Direct-Reading Comparison Spectroradiometer
Applied Optics, 1966A modification of the Cary Model 14 for radiometry is described which allows recording in microwatts per square mlllimeter per nanometer on the ordinate and linear wavelength on the abscissa through the range 250-2500 nm. A 5.08-cm diam rotating integrating sphere is used to compare standard to unknown sources at a 30 c/s rate.
S. Hedelman, D. C. Nelson
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A Computer Based Spectroradiometer System
Applied Optics, 1970A spectroradiometer system is described which is designed to make measurements of the spectral energy-distribution of light sources over the 0.25-2.5-micro wavelength range. A review is presented of some of the major experimental problems encountered in radiometry, in conjunction with the approach employed here to meet these problems.
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Continuously Recording Spectroradiometer*
Journal of the Optical Society of America, 1958A spectroradiometer is described for recording the spectral distribution of daylight or of any artificial light source that radiates steadily for 3.5 min. Beams from the external source and from an internal standard lamp are deviated alternately through a monochromator to a multiplier phototube.
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Autonomous field spectroradiometers
2016 IEEE International Geoscience and Remote Sensing Symposium (IGARSS), 2016In field spectroscopy applications the autonomous field spectroradiometer is configured to measure the down-welling irradiance and up-welling radiance, from this it is possible to calculate the reflectance properties of the surface or canopy and how it may change over time and with illumination geometry. This paper reviews the merits and limitations of
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An On-Board Submillimeter Spectroradiometer
1976Studies of the spectrum of the sun’s radiation in the submillimeter wavelength range are of considerable interest for the determination of the physical conditions in the lowest layers of its atmosphere (temperature, active regions) [1] and for the detection of highly ionized atoms of heavy elements in the solar corona [2].
V. I. Lapshin +3 more
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Testing of the SR5000 spectroradiometer performance
SPIE Proceedings, 2002The SR5000 spectroradiometer addresses a wide variety of military, industrial and scientific applications that demand real-time, noncontact, highly accurate and highly sensitive measurements of object’s radiometric properties. It covers the waveband from 0.207~14.5m, has spectral resolution as fine as 2% and records over 30 spectra per second.
Jun Wang +4 more
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