Abstract
ABSTRACT The method of using a CW dye laser for spectroradiometric and spectrophotometric measurements as developed and practiced at NBS and NPL will be described. A brief review of the development of this concept at NBS will be given, followed by a description of the present system and a proof of concept measurement with the NBS High Accuracy Spectrophotometer. The paper goes on to describe several intercomparisons which have relied on the use of dye laser spectrometry. These are an NBS electron storage ring - silicon detector - spectral irradiance scale intercomparison and an improved accuracy intercomparison of two primary radiometric standards: the NPL cryogenic radiometer and the PTB electron storage ring BESSY. Transmittance intercomparisons of NBS and NPS interference filters will also be presented. Finally, a brief description will be made of suggested proposals of future directions for research.
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