U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Search Publications by: Sergey Mekhontsev (Assoc)

Search Title, Abstract, Conference, Citation, Keyword or Author
Displaying 26 - 50 of 51

Infrared Emittance Measurements at NIST

October 5, 2005
Author(s)
Leonard M. Hanssen, Benjamin K. Tsai, Sergey Mekhontsev
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 for a

Emissivity Modeling of Thermal Radiation Sources With Concentric Grooves

July 1, 2004
Author(s)
A Prokhorov, Sergey Mekhontsev, Leonard Hanssen
Monte Carlo based specialized software has been applied to the statistical modeling of effective emissivity of radiators with concentric grooves of trapezoidal and triangular profile. A specular-diffuse model is used in which the thermal emission from the

Monte Carlo Modeling of an Integrating Sphere Reflectometer

July 1, 2003
Author(s)
A Prokhorov, Sergey Mekhontsev, Leonard Hanssen
The Monte Carlo method has been applied to numerical modeling of an integrating sphere designed for hemispherical-directional reflectance factor measurements. It is shown that a conventional algorithm of inverse ray tracing used for estimation of

Low Scatter Optical System for Emittance and Temperature Measurements

October 1, 2002
Author(s)
Sergey Mekhontsev, Leonard M. Hanssen
The development and evaluation of an optical system for a new spectral directional emittance facility at NIST is reported. The imaging quality and signal contributions due to out-of-field-of-view scattering, commonly characterizedby the size-of-source