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You searched on: Topic Area: Optics

Displaying records 71 to 80 of 82 records.
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71. Effect of Line Width Roughness on Optical Scatterometry Measurements
Topic: Optics
Published: 4/6/2009
Authors: Brent C. Bergner, Thomas Avery Germer, Thomas Suleski
Abstract: Line width roughness (LWR) has been identified as a potential source of uncertainty in scatterometry measurements, and characterizing its effect is required to improve the method s accuracy and to make measurements traceable. In this work, we extend ...

72. EUVL dosimetry at NIST
Topic: Optics
Published: 3/13/2009
Authors: Charles S Tarrio, Steven E Grantham, Marc J Cangemi, Robert Edward Vest, Thomas B Lucatorto, Noreen Harned
Abstract: As part of its role in providing radiometric standards in support of industry, NIST has been active in advancing extreme ultraviolet dosimetry on various fronts. Recently, we undertook a major effort in accurately measuring the sensitivity of three ...

73. Fiber optic measurement considerations for the aerospace industry: Lessons learned from telecommunications
Topic: Optics
Published: 9/30/2008
Authors: Paul A Williams, Timothy J Drapela
Abstract: A brief history of measurement work for fiber optic telecommunications with application toward fiber optics in avionics

74. Angle-dependent infrared reflectance measurements in support of VIIRS
Topic: Optics
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 ...

75. Direct Experimental Observation of the Goos Hanchen Shift
Topic: Optics
Published: 4/9/2008
Authors: H G L Schwefel, W Kohler, Z Lu, Jingyun Fan, L Wang
Abstract: We report a precise direct measurement of the Goos-Hanchen (GH) shift after one reflection off a dielectric interface coated with periodic metal stripes. The spacial displacement of the shift is determined by image analysis. A maximal absolute shift ...

76. High Accuracy Dual Lens Transmittance Measurements
Topic: Optics
Published: 8/1/2007
Authors: J Cheung, James Gardner, Alan L Migdall, Sergey V Polyakov, Michael Ware
Abstract: We show how to determine the transmittance of short focal length lenses (f ~ 19 mm, in this case) with an uncertainty of 1 part in 103 or better by measuring transmittances of lens pairs of a set of three or more lenses with the same nominal focal le ...

77. Nonthermal continuum toward Sagittarius B2(N-LMH)
Topic: Optics
Published: 4/11/2007
Authors: J M Hollis, P R Jewell, A Remijan, Francis John Lovas
Abstract: An analysis of continuum antenna temperatures observed in theGBTspectrometer bandpasses is presented for observations toward Sgr B2(N-LMH). Since 2004, we have identified four new prebiotic molecules toward this source by means of rotational transiti ...

78. Alignment of Fiducial Marks in a Tomographic Tilt Series with an Unknown Rotation Axis
Topic: Optics
Published: 4/1/2007
Authors: Zachary H Levine, Peter Volkovitsky, Howard Hung
Abstract: Alignment for tomography using a transmission electron microscopy frequently uses colloidal gold particles as fiducial reference marks. Typically, there is an implicit assumption that the tilt axis of the tomographic series is orthogonal to the beam ...

79. Tests of a Two-Photon Technique for Measuring Polarization Mode Dispersion With Subfemtosecond Precision
Topic: Optics
Published: 1/1/1999
Authors: Eric Dauler, Gregg Jaeger, A Muller, Alan L Migdall
Abstract: An investigation is made of a recently introduced quantum interferometric method capable of measuring polarization mode dispersion (PMD) on sub-femtosecond scales, without the usual interferometric stability problems associated with such small ...

80. Vibrationally-Resolved Sum-Frequency Generation With Broad Bandwidth Infrared Pulses
Topic: Optics
Published: 10/15/1998
Authors: Lee J Richter, T Petralli-Mallow, John C. Stephenson
Abstract: We present a novel procedure for vibrationally-resolved sum-frequency generation (SFG) in which a broad-bandwidth IR pulse is mixed with a narrow-bandwidth visible pulse. The resultant SFG spectrum is dispersed with a spectrograph and detected in pa ...

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