Take a sneak peek at the new NIST.gov and let us know what you think!
(Please note: some content may not be complete on the beta site.).

View the beta site
NIST logo

Publications Portal

You searched on: Author: Leonard Hanssen

Displaying records 1 to 10 of 164 records.
Resort by: Date / Title

1. Infrared Optical Properties of Materials
Series: Special Publication (NIST SP)
Report Number: 250-94
Published: 2/24/2015
Authors: Simon Grant Kaplan, Leonard M Hanssen, Raju Vsnu Datla
Abstract: This document describes the Fourier Transform Infrared Spectrophotometry (FTIS) Facility at the Sensor Science Division (SSD) of the National Institute of Standards and Technology (NIST) to provide the infrared optical properties of materials (IR ...

2. Atomic Clock with 1x10^u-18^ Room-Temperature Blackbody Stark Uncertainty
Published: 12/31/2014
Authors: Kyle P Beloy, Nathan Morris Bjork Hinkley, Nate B. Phillips, Jeffrey A Sherman, Marco Schioppo, John H Lehman, Ari D Feldman, Leonard M Hanssen, Christopher W Oates, Andrew D Ludlow
Abstract: The Stark shift due to blackbody radiation (BBR) is a key factor limiting the performance of many atomic frequency standards, with the BBR environment inside the clock apparatus being difficult to characterize at a high level of precision. Here we de ...

3. Spectral Emissivity Measurements
Published: 7/10/2014
Authors: Hiromichi Watanabe, Juntaro Ishii, Hidenobu Wakabayashi, Tomoyuki Kumano, Leonard M Hanssen
Abstract: Chapter 9 describes the wide variety of experimental instrumentation and methods used for spectral emissivity measurements at both ambient and elevated temperatures, along with specific examples of materials studied. There are a number of measure ...

4. New Developments in the NIST Infrared Optical Properties of Materials Program
Published: 7/1/2014
Authors: Leonard M Hanssen, Sergey Mekhontsev, Jinan Zeng, John H Burnett
Abstract: The Infrared Optical Properties of Materials program in the Sensor Science Division at the National Institute of Standards and Technology (NIST) continues to upgrade its capabilities to provide comprehensive coverage of measurable infrared optical pr ...

5. Evaluation of dome-input geometry for pyroelectric detectors
Published: 6/24/2013
Authors: Jinan Zeng, Leonard M Hanssen, George P Eppeldauer
Abstract: Dome-input pyroelectric radiometers with different black coatings were developed to extend the spectral responsivity scale from near infrared (NIR) to 20 μm. The reflective dome with shiny gold-coating has been known to be an efficient light t ...

6. Measurements of Infrared Spectral Directional Emittance at NIST ‹ A Status Update
Published: 9/12/2012
Authors: Boris Wilthan, Leonard M Hanssen, Sergey Mekhontsev
Abstract: Over the past two decades, the Sensor Science Division at the National Institute of Standards and Technology (NIST) has developed extensive capabilities for the characterization of the infrared optical properties of materials and components. These ...

7. Spectral responsivity calibrations of two type pyroelectric radiometers using three different methods
Published: 8/15/2012
Authors: Jinan Zeng, George P Eppeldauer, Leonard M Hanssen, Vyacheslav B Podobedov
Abstract: Spectral responsivity calibrations of two different type pyroelectric radiometers have been made in infrared region up to 14 μm in power mode using three different calibration facilities at NIST. One pyroelectric radiometer is a temperature-cont ...

8. Absorption and Reflection of Infrared Radiation by Polymers in Fire-Like Environments
Published: 7/17/2012
Authors: Gregory T Linteris, Mauro Zammarano, Boris Wilthan, Leonard M Hanssen
Abstract: In large-scale fires, the input of energy to burning materials occurs predominantly by radiative transfer. The in-depth absorption of radiant energy by a polymer influences its ignition time and burning rate. The present investigation examines two ...

9. BRDF measurements of graphite used in high-temperature fixed point blackbody radiators: a multi-angle study at 405 nm and 658 nm
Published: 3/12/2012
Authors: Heather J Patrick, Leonard M Hanssen, Jinan Zeng, Thomas Avery Germer
Abstract: We have measured angle- and polarization-resolved, hemispherical bidirectional reflectance distribution function (BRDF) for two types of graphite used in the fabrication of high temperature fixed point (HTFP) blackbody cavities. Measurements were m ...

10. An absolute cavity pyrgeometer to measure the absolute outdoor longwave irradiance with traceability to International System of Units, SI
Published: 3/1/2012
Authors: Ibrahim Reda, Jinan Zeng, Jonathan Scheuch, Leonard M Hanssen, Daryl Myers, Boris Wilthan, Tom Stoffel
Abstract: This article describes a method of measuring the absolute outdoor longwave irradiance using an absolute cavity pyrgeometer (ACP). The ACP consists ofa domeless thermopile pyrgeometer, gold- plated concentrator, temperature controller, and data acqu ...

Search NIST-wide:

(Search abstract and keywords)

Last Name:
First Name:

Special Publications:

Looking for a NIST Special Publication (NIST SP Series)? Place the series number and dash in the report number field (Example: 800-) and begin your search.

  • SP 250-XX: Calibration Services
  • SP 260-XX: Standard Reference Materials
  • SP 300-XX: Precision Measurement and Calibration
  • SP 400-XX: Semiconductor Measurement Technology
  • SP 480-XX: Law Enforcement Technology
  • SP 500-XX: Computer Systems Technology
  • SP 700-XX: Industrial Measurement Series
  • SP 800-XX: Computer Security Series
  • SP 823-XX: Integrated Services Digital Network Series