Spectral radiation measurement using photodiode-array polychromators is treated. The frequency range from X-ray to far infrared can be covered. The adaptation of the amplification to the maximum intensities in the spectrum is realized via the illumination time. The uncertainties in the measured signals are determined by light and noise; the latter can be reduced by signal averaging. The photodiode-array measurement is especially suited for fluctuating intensities and single flashes, and is to be preferred for fast measurements and when concessions in resolution and accuracy can be made. Investigations in the visible range show that linearities better than 1 percent can be obtained and that resolutions of 0.1 percent of the maximum value in the spectrum are possible.
Spectral Radiometry: Methods, Measuring Techniques, and Applications
- Pub Date:
- October 1986
- Radiation Spectra;
- Spectral Resolution;