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You searched on: Author: leonard hanssen

Displaying records 21 to 30 of 164 records.
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21. An infrared laser-based reflectometer for low reflectance measurements of samples and cavity structures
Published: 9/15/2008
Authors: Leonard M Hanssen, Jinan Zeng
Abstract: An instrument, the Complete Hemispherical Infrared Laser-based Reflectometer (CHILR), has been designed and built for the accurate characterization of the total reflectance of highly absorbing samples and cavity structures down to the level of 10-5 ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=842545

22. Angle-dependent infrared reflectance measurements in support of VIIRS
Published: 8/14/2008
Authors: Simon Grant Kaplan, Leonard M Hanssen, Enrique J. Iglesias
Abstract: We have developed a goniometric reflectometer using a Fourier-transform infrared (FTIR) spectrometer source for polarized reflectance measurements from 1 um to 20 um wavelength at angles of incidence from 10° to 80°, with an incident beam geometry of ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=842529

23. Evaluation of Blackbody Cavity Emissivity in the Infrared Using Total Integrated Scatter Measurements
Published: 2/1/2008
Authors: Leonard M Hanssen, Sergey Mekhontsev, Jinan Zeng, A Prokhorov
Abstract: Deviations from ideal blackbody (BB) behavior can be characterized by a BB s effective emissivity. The cavity emissivity is most often obtained through a model, given a particular set of input parameters associated with the BB cavity geometry and sur ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=841107

24. Water Heat Pipe Blackbody as a Reference Spectral Radiance Source Between 50 C and 250 C
Published: 4/17/2006
Authors: Mart Noorma, Sergey Mekhontsev, V B Khromchenko, Maritoni Abatayo Litorja, Claus Cagran, Jinan Zeng, Leonard M Hanssen
Abstract: Realization of a radiometric temperature scale for near ambient temperatures with high accuracy is crucial for a number of demanding military and commercial applications. Reliable radiation sources with high stability and good spatial uniformity have ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=841017

25. Radiation Properties of IR Calibrators With V-Grooved Surfaces
Published: 4/1/2006
Authors: Leonard M Hanssen, A Prokhorov, Sergey Mekhontsev
Abstract: Use of linear or concentric grooves is a well-known approach for increasing the surface emissivity to enable the construction of compact blackbody radiators, improve absorptance of stray radiation traps, baffles and thermal radiation detectors, as we ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=841015

26. Design and characterization of Si and InGaAs pyrometers for radiance temperature scale realization between 232 {?}C and 962 {?}C
Published: 1/1/2006
Authors: Mart Noorma, Sergey Mekhontsev, K Khromchenko, Alex Gura, Maritoni Abatayo Litorja, Benjamin K Tsai, Leonard M Hanssen
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=104059

27. Development and calibration of pyroelectric radiometer standards at NIST
Published: 1/1/2006
Authors: George P Eppeldauer, Zeng j, Leonard M Hanssen
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=104437

28. Development and calibration of pyroelectric radiometer standards at NIST
Published: 1/1/2006
Authors: George P Eppeldauer, Jinan Zeng, Leonard M Hanssen
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=104435

29. Radiation properties of IR calibrators with V-grooved surfaces
Published: 1/1/2006
Authors: Alexander Prokhorov, Leonard M Hanssen, Sergey Mekhontsev
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=104122

30. Water heat pipe blackbody as a reference spectral radiance source between 50 {?}C and 250 {?}C
Published: 1/1/2006
Authors: Mart Noorma, Sergey Mekhontsev, V B Khromchenko, Maritoni Abatayo Litorja, Claus Cagran, Jinan Zeng, Leonard M Hanssen
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=104060



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