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Displaying records 11 to 20 of 67 records.
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11. Long Working-Distance Optical Trap for in Situ Analysis of Contact-Induced Phase Transformations
Topic: Optical Metrology
Published: 5/11/2015
Authors: Joshua A Gordon, Ryan D Davis, Sara Lance, Margaret A Tolbert
Abstract: The development and characterization of a long working-distance optical trap to analyze a diverse range of particle phase transformations and crystal growth processes is described. Utilizing an upward propagating Gaussian beam and a down-ward propag ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=917690

12. Measurement of the Gold-Gold Bond Rupture Force at 4 K in a Single-Atom Chain Using Photon-Momentum-Based Force Calibration
Topic: Optical Metrology
Published: 12/22/2014
Authors: Douglas T Smith, Jon Robert Pratt
Abstract: We present instrumentation and methodology for simultaneously measuring force and displacement at the atomic scale at 4 K. The technique, which uses a macroscopic cantilever as a force sensor and high-resolution, high-stability fiber-optic interfero ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=909684

13. Experimental Bounds on Classical Random Field Theories
Topic: Optical Metrology
Published: 12/10/2014
Authors: Joffrey Kent Peters, Sergey V Polyakov, Jingyun Fan, Alan L Migdall
Abstract: Alternative theories to quantum mechanics motivate important fundamental tests of our understanding and description of the smallest physical systems. Here we place experimental limits on those classical field theories which result in power-depend ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=917261

14. Progress toward Radiation-Pressure-Based Measurement of High-Power Laser Emission - Under Policy Review
Topic: Optical Metrology
Published: 10/6/2014
Authors: Paul A Williams, Joshua Aram Hadler, Daniel King, Robert Lee, Frank C. Maring, Gordon Allan Shaw, Nathan A Tomlin, John H Lehman, Marla L Dowell
Abstract: We present an overview of our efforts toward using optical radiation pressure as a means to measure optical power from high-power lasers. Early results with measurements ranging from tens of watts to 92 kW prove the concept, but validation uncertaint ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=916422

15. Superconducting nanowire single photon detectors fabricated from an amorphous Mo0.75Ge0.25 thin-film
Topic: Optical Metrology
Published: 7/15/2014
Authors: Varun Boehm Verma, Adriana E Lita, Michael R Vissers, Francesco Marsili, David P Pappas, Richard P Mirin, Sae Woo Nam
Abstract: We present the characteristics of superconducting nanowire single photon detectors (SNSPDs) fabricated from amorphous Mo0.75Ge0.25 thin -films. Fabricated devices show a saturation of the internal detection efficiency at temperatures below 1 K, w ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=915243

16. An analysis of the nonlinear spectral mixing of didymium and soda-lime glass beads using hyperspectral imagery (HSI) microscopy
Topic: Optical Metrology
Published: 6/13/2014
Authors: Ronald Resmini, Robert S Rand, Christopher Deloye, David W Allen
Abstract: Nonlinear spectral mixing occurs when materials are intimately mixed. Intimate mixing is a common characteristic of granular materials such as soils. A linear spectral unmixing inversion applied to a nonlinear mixture will yield subpixel abundance es ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=915979

17. Single molecule confocal fluorescence lifetime correlation spectroscopy for accurate nanoparticle size determination
Topic: Optical Metrology
Published: 5/15/2014
Authors: Bonghwan B. Chon, Kimberly A Briggman, Jeeseong Hwang
Abstract: We report on an experimental procedure in confocal single molecule fluorescence lifetime correlation spectroscopy (FLCS) to determine the range of excitation power and molecule concentration in solution under which the application of an unmodified ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=914381

18. Semiconductor-based detectors
Topic: Optical Metrology
Published: 12/13/2013
Authors: Sergio Cova, Massimo Ghioni, Mark A. Itzler, Joshua C Bienfang, Alessandro Restelli
Abstract: There is nowadays a widespread and growing interest in low-level light detection and imaging. This interest is driven by the need for high sensitivity in various scientific and industrial applications such as fluorescence spectroscopy in life and ma ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=914460

19. Practical Use and Calculation of CCT and Duv
Topic: Optical Metrology
Published: 10/18/2013
Author: Yoshihiro Ohno
Abstract: The Correlated Color Temperature (CCT) is often used to represent chromaticity of white light sources, but chromaticity is two-dimensional, and another dimension, the distance from the Planckian locus, is often missing. Duv is defined in ANSI C78.377 ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=912622

20. Fourier Domain Optical Tool Normalization for Quantitative Parametric Image Reconstruction
Topic: Optical Metrology
Published: 9/5/2013
Authors: Jing Qin, Richard M Silver, Bryan M Barnes, Hui Zhou, Francois R. Goasmat
Abstract: There has been much recent work in developing advanced optical metrology methods that use imaging optics for critical dimension measurements and defect detection. Sensitivity to nanometer scale changes has been observed when measuring critical dimens ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=913587



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