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Comparison of Two Cryogenic Radiometers at NIST

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ABSTRACT

Two cryogenic radiometers from NIST, one from the Optical Technology Division and the other from the Optoelectronics Division, were compared at three visible laser wavelengths. For this comparison, each radiometer calibrated two photodiode trap detectors for spectral responsivity. The calibration values for the two trap detectors agreed within the expanded (k = 2) uncertainties. This paper describes the measurement and results of this comparison.

No MeSH data available.


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A three Si photodiode reflectance trap detector. Shown is its optical path, which includes the five surface reflectances.
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f1-j64hou: A three Si photodiode reflectance trap detector. Shown is its optical path, which includes the five surface reflectances.

Mentions: Both NIST Boulder and NIST Gaithersburg supplied a trap detector for the comparison. Each trap was a three photodiode reflectance configuration shown in Fig. 1 [8, 9]; one that was commercially built and another built in the Optical Technology Division in Gaithersburg. The devices were selected to be the best that were available at the time of the measurements and not built or designed specifically for this intercomparison.


Comparison of Two Cryogenic Radiometers at NIST
A three Si photodiode reflectance trap detector. Shown is its optical path, which includes the five surface reflectances.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4862825&req=5

f1-j64hou: A three Si photodiode reflectance trap detector. Shown is its optical path, which includes the five surface reflectances.
Mentions: Both NIST Boulder and NIST Gaithersburg supplied a trap detector for the comparison. Each trap was a three photodiode reflectance configuration shown in Fig. 1 [8, 9]; one that was commercially built and another built in the Optical Technology Division in Gaithersburg. The devices were selected to be the best that were available at the time of the measurements and not built or designed specifically for this intercomparison.

View Article: PubMed Central - PubMed

ABSTRACT

Two cryogenic radiometers from NIST, one from the Optical Technology Division and the other from the Optoelectronics Division, were compared at three visible laser wavelengths. For this comparison, each radiometer calibrated two photodiode trap detectors for spectral responsivity. The calibration values for the two trap detectors agreed within the expanded (k = 2) uncertainties. This paper describes the measurement and results of this comparison.

No MeSH data available.


Related in: MedlinePlus