Sharma, Parag and Jaiswal, V. K. and -, Sudama and Mehrotra, Ranjana and Kandpal, H. C. (2010) Upgradation of a Spectral Irradiance Measurement Facility at National Physical Laboratory, India. MAPAN - Journal of Metrology Society of India, 25 (1). pp. 21-28. ISSN 0974-9853

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Abstract

This report describes the details of a recently upgraded spectral irradiance measurement facility in optical radiation standards at National Physical Laboratory, India. This facility provides the calibration of spectral irradiance in the wavelength range 280 nm - 2500 nm. PTB, Braunschweig, Germany calibrated five numbers of 1000 W quartz halogen lamps, which are used as reference standards for spectral irradiance scale. In addition to providing the details of instruments, the procedure of calibration and evaluation of uncertainties is also described. For checking the fidelity, repeatability and reproducibility of the upgraded system, calibration of one of the PTB calibrated lamps, was done against the other four PTB calibrated lamps. These measurements not only provide confidence on the upgraded system but also verify the retention of the PTB certificate values after a lapse of two years after their calibration.

Item Type:	Article
Additional Information:	Copyright for this article belongs to M/s Springer Verlag.
Subjects:	Instruments/ Instrumentation Physics
Divisions:	UNSPECIFIED
Depositing User:	Ms Neetu Chandra
Date Deposited:	24 Jul 2012 12:42
Last Modified:	24 Jul 2012 12:42
URI:	http://npl.csircentral.net/id/eprint/381

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