R Friedrich

High-accuracy radiation thermometry at the National Metrology Institute of Germany, the PTB

J. Hollandt, R Friedrich, B. Gutschwager et al. · High Temperatures-High Pressures · 2003 · 53 citations

Engineering, Measurement, Thermal Sensing +25

Present State of the Comparison between Radiometric Scales Based on Three Primary Standards

M Stöck, Joachim Fischer, R Friedrich et al. · Metrologia · 1993 · 42 citations

Engineering, Measurement, Ptb Radiometric Scales +30

Accurate calibration of filter radiometers against a cryogenic radiometer using a trap detector

R Friedrich, Joachim Fischer, M Stöck · Metrologia · 1995 · 40 citations

Engineering, Measurement, Instrumentation Engineering +17

New spectral radiance scale from 220 nm to 2500 nm

R Friedrich, Joachim Fischer · Metrologia · 2000 · 31 citations

Ultraviolet Light, Engineering, Measurement +21

Improved calibration of the spectral responsivity of interference filter radiometers in the visible and near infrared spectral range at PTB

D. R. Taubert, R Friedrich, Jürgen Hartmann et al. · Metrologia · 2003 · 30 citations

Engineering, Measurement, Absorption Spectroscopy +22