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You searched on: Author: thomas larason

Displaying records 11 to 20 of 45 records.
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11. Evaluation of optical radiation detectors in the range from 0.8 µm to 20 µm at the NIST infrared spectral calibration facility
Published: 11/26/2012
Authors: Vyacheslav B Podobedov, George P Eppeldauer, Thomas C Larason
Abstract: Analysis of multiple factors affecting the uncertainty of the absolute spectral responsivity of optical radiation detectors is presented. This includes both the validation of the radiometric scale of the infrared reference detectors and the scale ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=912750

12. Extension of the NIST spectral power-responsivity calibration service to 2500 nm
Published: 3/2/2012
Authors: George P Eppeldauer, Howard W Yoon, Jinan Zeng, Thomas C Larason, Jeanne M Houston, Vladimir Khromchenko
Abstract: The National Institute of Standards and Technology (NIST) is working to extend the upper wavelength limit of the spectral power-responsivity calibration service from 1800 nm to 2500 nm. This extension is based on extended-InGaAs (EIGA) transfer- and ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=910010

13. Comparison of a detector-based near-IR radiance-scale to an ITS-90 calibrated radiation thermometer
Published: 8/7/2011
Authors: George P Eppeldauer, Howard W Yoon, Jinan Zeng, Thomas C Larason
Abstract: Integrating-sphere-input InGaAs radiometers have been developed at the National Institute of Standards and Technology (NIST) to extend the detector-based calibrations from the Si range to the near-IR. These near-IR radiometers are used to determine t ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=906022

14. Calibrations of Current-to-Voltage Transimpedance Amplifiers Using Electrical Standards
Published: 6/13/2010
Authors: Howard W Yoon, George P Eppeldauer, Dean G Jarrett, Thomas C Larason, Wan-Seop Kim
Abstract: For photocurrent measurements with low uncertainties, a wide-dynamic range current-to-voltage converter traceable to resistance standards has been developed at the NIST. The design and calibration of the converter standard are described. For validat ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=905053

15. Report on the Key Comparison CCPR K2.a-2003
Published: 10/30/2009
Authors: Yoshihiro Ohno, Steven W Brown, Thomas C Larason
Abstract: Under the framework of Mutual Recognition Arrangement (MRA) for national measurements standards and for calibration and measurement certificates issued by National Metrology Institutes (NMIs) signed in 1999, an international comparison of spectral re ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=904379

16. Extension of the NIST spectral responsivity scale to the infrared using improved-NEP pyroelectric detectors
Published: 6/2/2009
Authors: George P Eppeldauer, Jinan Zeng, Howard W Yoon, Boris Wilthan, Thomas C Larason, Leonard M Hanssen
Abstract: Routine NIST spectral responsivity calibrations are needed for the infrared range. Low NEP pyroelectric radiometers have been developed for traditional monochromator applications to extend the responsivity scale to the infrared. After NEP tests, the ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=900961

17. Radiometer standard for absolute responsivity calibrations from 950 nm to 1650 nm with 0.05% (k = 2) uncertainty
Published: 6/2/2009
Authors: George P Eppeldauer, Howard W Yoon, Yuqin Zong, Thomas C Larason, Allan W. Smith, M. Racz
Abstract: A sphere-input transfer-standard detector has been developed to calibrate detectors and radiometers for absolute spectral power, irradiance, and radiance responsivity in the near-IR range with uncertainties similar to those of silicon trap-detector c ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=900973

18. Extension of the NIST tristimulus colorimeter for solid-state light source measurements
Published: 5/29/2009
Authors: George P Eppeldauer, Carl C Miller, Thomas C Larason, Yoshihiro Ohno
Abstract: In order to obtain improved color measurement uncertainties for solid state light (SSL) sources, the second generation tristimulus colorimeter of NIST has been extended with a fifth channel to perform efficient matrix corrections for the spectral mis ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=903041

19. Illuminance responsivity calibration of reference photometers at the NIST SIRCUS and SCF facilities
Published: 5/29/2009
Authors: George P Eppeldauer, Carl C Miller, Thomas C Larason, Yoshihiro Ohno
Abstract: The illuminance responsivities of two transfer standard photometers have been directly determined from their spectral responsivity calibrations at two different calibration facilities of NIST. The main characteristics of the two photometers, and thei ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=902807

20. Spectroradiometric Detector Measurements: Ultraviolet, Visible, and Near Infrared Detectors for Spectral Power
Series: Special Publication (NIST SP)
Report Number: 250-41-08
Published: 10/1/2008
Authors: Thomas C Larason, Jeanne M Houston
Abstract: The National Institute of Standards and Technology supplies calibrated photodiode standards and special tests of photodetectors for spectral radiant power responsivity from 200 nm to 1800 nm. The scale of spectral radiant power responsivity is based ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=841061



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