02698aam 2200445I 450 991071126060332120120619032355.0GOVPUB-C13-4054ae43359288269ac3670aa8b8fdfa(CKB)5470000002481414(OCoLC)795837506(EXLCZ)99547000000248141420120619d2011 ua 0engtxtrdacontentcrdamediacrrdacarrierCertified transmittance density uncertainties for standard reference materials using a tranfer spectrophometer /J. C. Travis, M. V. Smith, S. J. Choquette, Hung-Kung LiuGaithersburg, MD :U.S. Dept. of Commerce, National Institute of Standards and Technology,2011.1 online resource (14 pages) illustrationsNIST technical note ;1715"CODEN: NTNOEF"--Title page verso."November 2011"Contributed record: Metadata reviewed, not verified. Some fields updated by batch processes.Overall uncertainties are evaluated for the certification of transmittance density (absorbance referred to air) and regular spectral transmittance for solid neutral density filter Standard Reference Materials by means of a transfer spectrophotometer. Traceability is asserted by means of comparison measurements to a recognized reference spectrophotometer. The uncertainties are evaluated without bias correction, using the combination of the legacy combined standard uncertainty values with uncertainty components for the measured bias, the standard uncertainty of this measured bias, and the standard uncertainty characteristic of simple replication for a single measurement using the transfer spectrophotometer. Numerical results are given, and are anticipated to be the values initially quoted on certificates and in reports of recertification. However, these values are subject to change upon future adjustment of estimated uncertainty components for the filters or changes in the observed bias with future determinations.Neutral density filtersSpectrophotometryNeutral density filters.Spectrophotometry.Travis John C.1389082Choquette S. J.Liu Hung-KungSmith Melody V.National Institute of Standards and Technology (U.S.)NBSNBSGPOBOOK9910711260603321Certified transmittance density uncertainties for standard reference materials using a tranfer spectrophometer3490210UNINA