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Author: thomas larason

Displaying records 11 to 20 of 39 records.
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11. 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

12. 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

13. 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

14. 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

15. Comparison of absolute spectral irradiance responsivity measurement techniques using wavelength-tunable lasers
Published: 6/20/2007
Authors: V Ahtee, Steven W Brown, Thomas C Larason, Keith R Lykke, E and Noorma Ikonen
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=101543

16. Calibration and Characterization of UV Sensors for Water Disinfection
Published: 1/2/2006
Authors: Thomas C Larason, Yoshihiro Ohno
Abstract: Ultraviolet radiation (UV) effectively inactivates common pathogens found in ground and surface waters such as Cryptosporidium, Giardia, and most bacterial pathogens (e. g., E. coli). Water treatment facilities recently started using ultraviolet rad ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=841150

17. Calibration and Standardization Issues of UV Sensors for Water Disinfection
Published: 8/1/2005
Authors: Thomas C Larason, Yoshihiro Ohno
Abstract: Ultraviolet radiation (UV) effectively inactivates common pathogens found in ground and surface waters such as Cryptosporidium, Giardia and most bacterial pathogens. Water treatment facilities recently started using ultraviolet radiation for disinfec ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=840960

18. Linearity of InGaAs Photodiodes
Published: 1/1/2003
Authors: Howard W Yoon, James J. Butler, Thomas C Larason, George P Eppeldauer
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=104272

19. Characterization of UV Detectors at SURF III (invited)
Published: 3/1/2002
Authors: Ping-Shine Shaw, Thomas C Larason, R Gupta, Keith R Lykke
Abstract: The Synchrotron Ultraviolet Radiation Facility (SURF III) at the National Institute of Standards and Technology provides a unique research opportunity in precision measurement with its continuous and calculable radiation stretching from the soft x-ra ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=841600

20. Using the Substitution Method with a Monitor Detector will Improve the Accuracy of Absolute Spectral Power Responsivity Measurements
Published: 11/1/2001
Authors: Sally Skidmore Bruce, Thomas C Larason
Abstract: Many radiometric, photometric, and colorimetric applications require the determination of the absolute spectral power responsivity of photodetectors. The absolute spectral power responsivity is the ratio of the photodetector's output (in amperes ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=841592



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