optical_properties

Optical Radiation Measurements

Optical Properties of Materials Measurements

Technical Contacts:
Catherine Cooksey
Tel: 301-975-6208
E-mail: catherine.cooksey@nist.gov

Leonard Hanssen (38075S)
Tel: 301-975-2344
E-mail: leonard.hanssen@nist.gov

Simon Kaplan (38075S)
Tel: 301-975-2336
E-mail: simon.kaplan@nist.gov

Please contact the technical staff before shipping instruments or standards to the address listed below.

Mailing Address:
National Institute of Standards and Technology
100 Bureau Drive, Stop 8442
Gaithersburg, MD 20899-8442
Fax: 301-840-8551

Service ID Number	Description of Services	Fee ($)
38010C	Spectral Transmittance Filters (Cobalt Blue Glass)	2645
38020C	Spectral Transmittance Filters (Copper Green Glass)	2645
38030C	Spectral Transmittance Filters (Carbon Yellow Glass)	2645
38040C	Spectral Transmittance Filters (Selenium Orange Glass)	2645
38060S	Special Tests of Spectral Reflectance (250 nm to 2500 nm)	At Cost
38061S	Special Tests of Spectral Transmittance (250 nm to 2500 nm)	At Cost
38075S	Special Tests Infrared Reflectance, Transmittance, and Emittance of Materials	At Cost

Fees are subject to change without notice.

This laboratory's quality system is based on the ANSI/NCSL Z540-1-1994 standard and the ISO/IEC Guide 25.

Spectral Transmittance Filters (38010C-38040C)

NIST supplies to the customer standards of spectral transmittance for checking the photometric scale of spectrophotometers. These are either 30 mm polished glass disks or 51 mm polished glass squares, 2 mm to 3 mm thick, designated as cobalt blue, copper green, carbon yellow, and selenium orange. The relative expanded uncertainty ranges from approximately 0.2 % to 0.3 % of the value. Information provided to the user includes values of transmittance at 25 ° at 10 nm intervals from 380 nm to 770 nm, the estimated uncertainty of each value, and data as to the effect of temperature change on transmittance at each wavelength .

Special Tests of Spectral Reflectance (250 nm to 2500 nm) (38060S)

Measurements of spectral reflectance can be made for the wavelength region 250 nm to 2500 nm for neutral, non-fluorescent submitted test items. In general, measurements are performed at room temperature on test items with dimensions from 2 cm to 30 cm perpendicular to the incident beam. Two different measurements are performed of both specular and diffuse reflectance at angles, wavelengths, and polarizations specified by the customer. For the directional-hemispherical geometry incident angles of 0° and 6° are possible, and the later can be measured with the specular component either included or excluded. Uncertainty estimates will be given and will depend on the optical characteristics of the submitted test item and the instrument used to perform the measurement. Arrangements for these measurements on submitted test items must be made before shipment. The decision to perform the measurements and selection of the instruments to be used will rest with NIST. Test items not accepted for measurement will be returned.

Special Tests of Spectral Transmittance and Index of Refraction (120 nm to 2500 nm)(38061S)

Measurements of spectral transmittance and index of refraction can be made at wavelengths from 120 nm to 2500 nm for non-fluorescent submitted test items. In general, measurements are performed at room temperature with the incident beam normal to the front surface of the test item for transmittance measurements. Items with dimensions from 1 cm to 5.1 cm perpendicular to the incident beam are routinely accommodated. Test items for high-accuracy index measurements should have prism geometries with apex angles determined by the wavelength ranges desired. Other sizes and measurement conditions are possible in consultation with NIST staff. Uncertainty estimates will be given and will depend on the optical characteristics of the submitted test item and the instrument used to perform the measurement. Arrangements for these measurements on submitted test items must be made before shipment. The decision to perform the measurements and selection of the instruments to be used will rest with NIST. Test items not accepted for measurement will be returned.

Special Tests Infrared Reflectance, Transmittance, and Emittance of Materials (38075S)

Measurements of infrared spectral reflectance, transmittance, and emittance can be made for the wavelength region 1 μm to 25 μm (50 μm for transmittance) for submitted test items. In general, measurements are performed on test items with dimensions from 1 cm to 7.5 cm perpendicular to the incident beam. measurements can be performed in specular, diffuse, directional-hemispherical, and bidirectional distribution function (BRDF) geometries. Capabilities also exist for performing variable temperature measurements, with emittance measurements available from room temperature to 900 ºC. Uncertainty estimates are provided, and depend on the optical characteristics of the submitted test item and the instrument used to perform the measurement. Arrangements for measurements on submitted test items must be made before shipment. The decision to perform the measurements and selection of the instruments to be used rests with NIST. Test items not accepted for measurement will be returned.

Optical Radiation Measurements

Optical Properties of Materials Measurements

Rate our Services

Technical Contacts:
Melody Smith
Tel: 301-975-8533
E-mail: meldoy.smith@nist.gov

Please contact the technical staff before shipping instruments or standards to the address listed below.

Mailing Address:
National Institute of Standards and Technology
Attention: Optical Filters Program 100 Bureau Drive, Stop 8312
Gaithersburg, MD 20899-8312
Fax: 301-869-0413

Service ID Number	Recertification of NIST Photometric Standard Reference Materials SRM 930, SRM 1930, SRM 2930, SRM 2030, SRM 2031	Fee ($)
38065C	Recertification of NIST photometric Standard Reference Materials SRM 930, SRM 1930, or SRM 2930	1317
38066C	Recertification of NIST photometric Standard Reference Material SRM 2031	1845
38067C	Recertification of NIST photometric Standard Reference Material SRM 2030	896
38068C	Replacement filter for NIST photometric Standard Reference Materials SRM 930, SRM 1930, SRM 2030 or SRM 2930	847
38069C	Replacement filter for NIST photometric Standard Reference Material SRM 2031	1269

Fees are subject to change without notice.

Recertification of NIST photometric Standard Reference Materials SRM 930, SRM 1930, or SRM 2930 (38065C)
NIST Standard Reference Material neutral density glass sets, or the commercial equivalent, will be recertified for transmittance density and transmittance at the appropriate visible wavelengths using the Material Measurement Laboratory's traceable transfer spectrometer. The certification of these filter sets expires after a period of two years.

Recertification of NIST photometric Standard Reference Material SRM 2031 (38066C)
NIST Standard Reference Material SRM 2031, or the commercial equivalent, will be recertified for transmittance density and transmittance at the appropriate ultraviolet and visible wavelengths using the Material Measurement Laboratory's traceable transfer spectrometer. The certification of these filter sets expires after a period of two years.

Recertification of NIST photometric Standard Reference Material SRM 2030 (38067C)
NIST Standard Reference Material SRM 2030, or the commercial equivalent, will be recertified for transmittance density and transmittance at the appropriate visible wavelengths using the Material Measurement Laboratory's traceable transfer spectrometer. The certification of these filter sets expires after a period of two years.

Replacement filter for NIST photometric Standard Reference Materials SRM 930, SRM 1930, SRM 2030 or SRM 2930 (38068C)
A replacement filter for NIST Standard Reference Material neutral density glass filter sets will be supplied and certified for transmittance density and transmittance at the appropriate visible wavelengths using the Material Measurement Laboratory's traceable transfer spectrometer. The certification of this filter expires after a period of two years.

Replacement filter for NIST photometric Standard Reference Material SRM 2031 (38069C)
A replacement filter for NIST Standard Reference Material SRM 2031 will be supplied and certified for transmittance density and transmittance at the appropriate ultraviolet and visible wavelengths using the Material Measurement Laboratory's traceable transfer spectrometer. The certification of this filter expires after a period of two years.

References-Spectrophotometric Measurements

Certified Transmittance Density Uncertainties for Standard Reference Materials using a Transfer Spectrophotometer, J. C. Travis (ret.), M. V. Smith, S. J. Choquette, and Hung-kung Liu, NIST Technical Note 1715 (2011).

NIST Measurement Services: Spectral Reflectance, P. Y. Barnes, E. A. Early, and A. C. Parr, Natl. Inst. Stand. Technol. Spec. Publ. 250-8 (revised 1997).

NIST High Accuracy Reference Reflectometer-Spectrophotometer, J. Res. Natl. Inst. Stand. Technol. 101(5) 619 (1996).

45 Degrees/0 Degrees Reflectance Factors of Pressed Polytetrafluoroethylene (PTFE) Powder, Natl. Inst. Technol. Stand. Tech. Note 1413 (1995).

Compliance in spectrometry: quality assurance of spectrophotometric measurements at NIST, J. J. Hsia, T. C. Larason, P. Y. Barnes, Spectrophotometry, Luminescence and Coulour; Science & Compl. (1995).

Comparison of Regular Transmittance Scales of Four National Standardizing Laboratories, K. L. Eckerle, J. Bastie, J. Zwinkels, V. Saprintsky, and A. Ulyanov, Color Res. Appl. 18 (1), 35-40 (Feb. 1993).

International Intercomparison of Regular Transmittance Scales, K. L. Eckerle, E. Sutter, G. H. C. Freeman, G. Andor, and L. Fillinger, Metrologia 27, 33-38 (1990).

NBS Measurement Services: Regular Spectral Transmittance, K. L. Eckerle, J. J. Hsia, K. D. Mielenz, and V. R. Weidner, Natl. Bur. Stand. (U.S.), Spec. Publ. 250-6 (July 1987).

Establishing a Scale of Directional-Hemispherical Reflectance Factor 1: The Van den Akker Method, W. H. Venable, Jr., J. J. Hsia, and V. R. Weidner, J. Res. Natl. Bur. Stand. (U.S.), 82 (1), 29 (July-Aug. 1977).

Permanence of Glass Standards of Spectral Transmittance, K. S. Gibson and M. A. Belknap, J. Res. Natl. Bur. Stand. (U.S.), 44, 463 (May 1950).

NIST-NPL comparison of mid-infrared regular transmittance and reflectance, C. J. Chunnilall, F. J. J. Clarke, M. P. Smart, L. M. Hanssen, S. G. Kaplan, Metrologia 40, S55-S59 (2003).

Comparison of near-infrared transmittance and reflectance measurements using dispersive and Fourier transform spectrophotometers, S. G. Kaplan, L. M. Hanssen, E. A. Early, . E. Nadal and D. Allen, Metrologia 39, 157-164 (2002).

Infrared regular reflectance and transmittance instrumentation and standards at NIST, S. G. Kaplan and L. M. Hanssen, Analytica Chimica Acta 380, 303-310 (1998).

Infrared diffuse reflectance instrumentation and standards at NIST, L. M. Hanssen and S. G. Kaplan, Analytica Chimica Acta 380, 289-302 (1998).

Integrating-sphere system and method for absolute measurement of transmittance, reflectance, and absorptance of specular samples, L. M. Hanssen, Applied Optics 40 (19), 3196-3204 (2001).

Testing the radiometric accuracy of Fourier transform infrared transmittance measurements, S. G. Kaplan, R. U. Datla and L. M. Hanssen, Applied Optics 36, 8896-8908 (1997).

Wavenumber Standards for Mid-infrared Spectrometry, L. M. Hanssen and C. Zhu, Reproduced from: Handbook of Vibrational Spectroscopy, J. M. Chalmers and P. R. Griffiths (Editors), 1-11 (2002).

Integrating Spheres for Mid- and Near-infrared Reflection Spectroscopy, L. M. Hanssen and K. A. Snail, Reproduced from: Handbook of Vibrational Spectroscopy, J. M. Chalmers and P. R. Griffiths (Editors), 1-19 (2002).

Program questions: Calibrations

Phone: 301-975-2200, Fax: 301-975-2950

NIST, 100 Bureau Drive, Stop 8363, Gaithersburg, MD 20899-8363