New Developments and Applications in Optical Radiometry: Proceedings of the Second International Conference held at the National Physical Laboratory, London, England, April 1988

The Second International Conference on Radiometry was held at the National Physical Laboratory, London, in April 1988 and attracted participants from 13 countries. This volume contains 30 papers, both invited and contributed, including a keynote address summarizing the major achievements of the past 100 years in optical radiometry. New Developments and Applications in Optical Radiometry provided a forum for the presentation and discussion of recent advances made in absolute radiometry. Some emphasis was placed on applications to other measurement areas, such as radiometry in space, VUV and IR radiometry, laser power measurement and power measurement in fibre optic systems. The cross-disciplinary nature of the conference is illustrated by the broad scope of the papers in this volume. These proceedings will be of value to libraries and researchers in such areas as metrology, heliometry, telecommunications, optics, astronomy, space science and device physics.

Table of Contents:
Preface. Optical radiometry - one hundred years after Stefan and Boltzmann. Laser power and energy radiometry. Factors limiting the accuracy of absolute radiometry. The electron storage ring BESSY as a primary radiometric standard. The intercomparison of two cryogenic radiometers. Superconducting inductance bolometer with potential photon-counting sensitivity: a progress report. Characteristics of Ge and InGaAs photodiodes. Semiconductor photodiodes as detectors in the VUV and soft x-ray range. Absolute spectral responsivity 0.2 to 2.5 [mu]m. Space based solar irradiance measurements. Ground based solar radiometry. Current work at the National Research Council of Canada on absolute radiometer based calibrations in the infrared. Radiometric determination of the gold point. Application of absolute radiometry to the measurement of optical power in fibre optic systems. Blocked impurity band and superlattice detectors: prospects for radiometry. Generalised radiance and practical radiometry. On the definition of radiance for partially coherent sources. The manufacture and measurement of precision apertures. Total solar irradiance values determined using earth radiation budget experiment (ERBE) radiometers. Comparison of CNES spherical and NASA hemispherical large aperture integrating sources, I, as determined with a laboratory spectroradiometer. Comparison of CNES spherical and NASA hemispherical large aperture integration sources, II, as determined with the SPOT 2 satellite instruments. An optical heterodyne densitometer. Ultraviolet radiometry. Intercomparison of absolute radiometers at several visible laser wavelengths. Calibration of fiber optical power meters at PTB. Regeneration of the internal quantum efficiency of Si photodiodes. Reduction of the responsivity of the ROSAT focal plane x-ray detector (PSPC) to ultraviolet radiation and absolute calibration of its UV- quantum efficiency. A determination of the thermodynamic temperature of the freezing point of silver by infrared radiation thermometry. The establishment of a new detector based spectral power scale. Absolute radiometric determination for the distribution of temperature of the thermal sources of light. Workshop: dissemination of radiometric scales. List of participants. Author index.