Establishing a scale of directional-hemispherical reflectance factor I: The Van den Akker method

Venable, William H.; Hsia, Jack J.; Weidner, Victor R.

doi:10.6028/jres.082.004

Cited by 38 publications

(21 citation statements)

References 5 publications

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“…The reflectance scale for the reference standard was determined prior to the measurement sessions through comparison measurements of sintered PTFE and pressed PTFE. The spectral reflectance factors for sintered PTFE are traceable to the scale for spectral reflectance factor of pressed PTFE, which were established using the absolute method of Van den Akker [3] in the NIST Spectral Tri-function Automated Reference Reflectometer (STARR) facility [4].…”

Section: Calculation Of Reflectance Factorsmentioning

confidence: 99%

Reference Data Set of Human Skin Reflectance

Cooksey¹,

Allen²,

Tsai³

2017

J. RES. NATL. INST. STAN.

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Section: Calculation Of Reflectance Factorsmentioning

confidence: 99%

Reference Data Set of Human Skin Reflectance

Cooksey¹,

Allen²,

Tsai³

2017

J. RES. NATL. INST. STAN.

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“…Ten years later, in 1966, they refined their work under the same title and gave more detailed information about their method and the apparatus [17]. The van den Akker, or double-sphere method, was used at the NBS in the United States to calibrate a standard reflectance material [35]. The setup of the method measures the bihemispherical reflectance r(2p, 2p) of this material.…”

Section: Methods Of Van Den Akkermentioning

confidence: 99%

“…A more complicated expression [35] is found when one includes the non-Lambertian behavior of the integrating sphere.…”

Section: Methods Of Van Den Akkermentioning

confidence: 99%

Diffuse Reflectance and Transmittance

Höpe¹

2014

Experimental Methods in the Physical Sciences

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“…When the incident angle deviates from these values, the diffuse reflectance of the sphere coating changes [56], which affects the sphere response. The incident angle correction factor was measured by positioning the beam source at the center of the sphere, illuminating the hot spot, and measuring the sphere photometer response, y0(θe, φe).…”

Section: Incident Angle Correction Factormentioning

confidence: 99%

NIST measurement services: photometric calibrations

Zong¹,

Nadal²,

Tsai³

et al. 2018

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PrefaceThe calibration and related measurement services of the National Institute of Standards and Technology (NIST) are intended to assist the makers and users of precision measuring instruments in achieving the highest possible levels of accuracy, quality, and productivity. NIST offers over 300 different calibrations, special tests, and measurement assurance services. These services allow customers to directly link their measurement systems to measurement systems and standards maintained by NIST. These services are offered to the public and private organizations alike. They are described in NIST Special Publication (SP) 250, NIST Calibration Services Users Guide.The Users Guide is supplemented by a number of Special Publications (designated as the "SP250 Series") that provide detailed descriptions of the important features of specific NIST calibration services. These documents provide a description of the: (1) specifications for the services; (2) design philosophy and theory; (3) NIST measurement system; (4) NIST operational procedures; (5) assessment of the measurement uncertainty including an uncertainty budget; and (6) internal quality control procedures used by NIST. These documents will present more detail than can be given in NIST calibration reports, or than is generally allowed in articles in scientific journals. In the past, NIST has published such information in a variety of ways. This series will make this type of information more readily available to the user. This document, SP250-95 (2017), NIST Photometric Calibrations, is a revision of SP250-37 (1997). It covers the calibration of standards of luminous intensity, luminous flux, illuminance, luminance, luminous exposure, and color temperature (test numbers 37010C-37070C and 37020S-37130S in SP250, NIST Calibration Services Users Guide). Inquiries concerning the technical content of this document or the specifications for these services should be directed to one of the authors or to one of the technical contacts cited in SP250.NIST welcomes suggestions on how publications such as this might be made more useful. Suggestions are also welcome concerning the need for new calibrations services, special tests, and measurement assurance programs. AbstractThe National Institute of Standards and Technology provides calibration services for submitted artifacts for luminous intensity, illuminance, color temperature, total luminous flux, luminous exposure and luminance. Additionally, the National Institute of Standards and Technology issues calibrated standards of luminous intensity, luminance, and color temperature. The procedures, equipment, and techniques used to perform these calibrations are described. Detailed estimates and procedures for determining uncertainties of the reported values are also presented along with the internal quality control procedures.

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Establishing a scale of directional-hemispherical reflectance factor I: The Van den Akker method

Cited by 38 publications

References 5 publications

Reference Data Set of Human Skin Reflectance

Reference Data Set of Human Skin Reflectance

Diffuse Reflectance and Transmittance

NIST measurement services: photometric calibrations

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