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Radiation Protection Dosimetry 91:133-138 (2000)
© 2000 Oxford University Press

Aberration Correction in the Brewer Spectrophotometer

J.E. Johnston, J.B. Kerr, C.T. McElroy and D.I. Wardle

The optical design of the Brewer Spectrophotometer has been optimised for measurements in the 300-320 nm wavelength range. An aberration resolution limit that is much less than the 0.6 nm FWHM (full width at half maximum) is achieved by using an Ebert-Fastie spectrometer design, modified by the inclusion tilted lens that optimises performance at 310 nm. The small contribution of the remaining aberration to the measured instrument function is critical to radiometric measurement quality. Ramifications of this design to the development of instrumentation with enhanced scanning abilities are discussed.


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