26 September 1989 A Radiometer For Precision Coherent Radiation Measurements
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A radiometer had been designed for precision coherent radiation measurements and tested for long-term repeatability at wavelengths of 488 and 633 nm. The radiometer consists of a single high-quality PN silicon photodiode maintained in a nitrogen atmosphere with a quartz window designed to eliminate interference problems. Ratio measurements between the radiometer and an absolute type detector were made over a period of 215 days. At 0.5 mW, the standard deviations were 0.008 and 0.009 % at 488 and 633 nm respectively. The maximum deviations from the mean were 0.016 and 0.015 % at the respective wavelengths. The high precision, simplicity, and portability of the radiometer make it an excellent transfer standard for radiometric measurements.
© (1989) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Douglas B. Thomas, Douglas B. Thomas, Edward F. Zalewski, Edward F. Zalewski, } "A Radiometer For Precision Coherent Radiation Measurements", Proc. SPIE 1109, Optical Radiation Measurements II, (26 September 1989); doi: 10.1117/12.960710; https://doi.org/10.1117/12.960710

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