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Author: leonard hanssen

Displaying records 21 to 30 of 162 records.
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21. 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 ...

22. 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 ...

23. 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

24. Development and calibration of pyroelectric radiometer standards at NIST
Published: 1/1/2006
Authors: George P Eppeldauer, Zeng j, Leonard M Hanssen

25. Development and calibration of pyroelectric radiometer standards at NIST
Published: 1/1/2006
Authors: George P Eppeldauer, Jinan Zeng, Leonard M Hanssen

26. Radiation properties of IR calibrators with V-grooved surfaces
Published: 1/1/2006
Authors: Alexander Prokhorov, Leonard M Hanssen, Sergey Mekhontsev

27. 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

28. SRM 2036 Near Infrared Reflection Wavelength Standard
Published: 11/1/2005
Authors: David Lee Duewer, Steven J Choquette, Leonard M Hanssen, E A. Early

29. Infrared Emittance Measurements at NIST
Published: 10/5/2005
Authors: Leonard M Hanssen, Benjamin K Tsai, Sergey Mekhontsev
Abstract: A new capability for the measurement of the temperature-dependent emittance of specular samples in the near infrared spectral region has been developed in NIST s Infrared Spectrophotometry Laboratory to provide emittance measurements and standards fo ...

30. Comparison of direct and indirect methods of spectral infrared emittance measurement, ed. by D. Zvizdic
Published: 1/1/2005
Authors: Leonard M Hanssen, Alexander Prokhorov, V B Khromchenko, Sergey Mekhontsev

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