Results 71 to 80 of about 21,471 (126)
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Review of Scientific Instruments, 1971
An ir radiometer utilizing a Golay cell was constructed to measure heat production in excised muscle preparations near room temperature. This radiometer resolves temperature changes of 1 mdeg on surface areas of several square millimeters with a lag time constant of a few milliseconds.
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An ir radiometer utilizing a Golay cell was constructed to measure heat production in excised muscle preparations near room temperature. This radiometer resolves temperature changes of 1 mdeg on surface areas of several square millimeters with a lag time constant of a few milliseconds.
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American Journal of Physics, 1968
In order to reduce the confusion associated with many of the introductory treatments of photometry, it is suggested that initially the concepts of radiation transfer be introduced in terms of the more familiar units of radiometry. The conversion to photometric units can then be accomplished by a straightforward integration.
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In order to reduce the confusion associated with many of the introductory treatments of photometry, it is suggested that initially the concepts of radiation transfer be introduced in terms of the more familiar units of radiometry. The conversion to photometric units can then be accomplished by a straightforward integration.
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Diffraction loss in radiometry
Applied Optics, 2003Diffraction loss in radiometry has gained in importance recently because of an increased interest in longer wavelengths and the continuous improvement in experimental accuracy. The deviation from geometrical optics now contributes significantly to the errors of experiments.
Martin W. McCall, Philip J. Edwards
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, 1994 We begin with some definitions employed in the quantitative measures of visible radiation, which will enable us to classify the orders of magnitude that we will encounter in our presentation.
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2009
Radiometric calculations for the generation and transfer of radiation are reviewed in this chapter. Every infrared system senses the power that is incident upon the detector. This power is generated by a remote source and transmitted to the optical system, which in turn focuses it on the detector.
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Radiometric calculations for the generation and transfer of radiation are reviewed in this chapter. Every infrared system senses the power that is incident upon the detector. This power is generated by a remote source and transmitted to the optical system, which in turn focuses it on the detector.
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SPIE Proceedings, 1990 This paper will discuss the problem of the decorrelation of speckle. When a target isirradiated with a coherent laser source, speckle leads to signal variations which is signal noise when the signal can't be adequately signal averaged. Movement of a diffuse incoherent scattering target decorrelates the spatial coherence but a temporal correlation ...
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SPIE Proceedings, 1994
Radiometry, defined as the measurement of optical radiation, has its limits. Other disciplines can measure routinely with uncertainties of 1 part in 10 6 (voltage), 1 part in 10 8 (length) or even 1 part in 10 12 (frequency). Radiometric measurements in the laboratory have achieved 1 part in 10 4 , and we are usually overjoyed when field ...
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Radiometry, defined as the measurement of optical radiation, has its limits. Other disciplines can measure routinely with uncertainties of 1 part in 10 6 (voltage), 1 part in 10 8 (length) or even 1 part in 10 12 (frequency). Radiometric measurements in the laboratory have achieved 1 part in 10 4 , and we are usually overjoyed when field ...
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Microwave radiometry of forests
Waves in Random Media, 2004Abstract Microwave remote sensing observations provide all weather, day/night monitoring of the earth's surface and make it possible to probe forest vegetation at various depths by operating at different frequencies. Significant progress in microwave radiometry of land surfaces has been made by using advanced airborne and spaceborne instruments and by ...
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2009
1.1 Definitions Consider the following definitions a starting point for our study of radiometry: radio- [
James M. Palmer, Barbara G. Grant
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1.1 Definitions Consider the following definitions a starting point for our study of radiometry: radio- [
James M. Palmer, Barbara G. Grant
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Radiometry of quasi-homogeneous sources and Wigner radiometry
Optik, 2012Abstract The radiometry of quasi-homogeneous sources is derived from the theory of partial coherence by using properties of the Wigner definition function. Suggested is the linear-system approach to the process of forming an optical image in which the convolution operator is used twice.
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