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ASTM E259 PDF
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Standard Practice for Preparation of Pressed Powder White Reflectance Factor Transfer Standards for Hemispherical and Bi-Directional Geometries
| Published by | Publication Date | Number of Pages |
| ASTM | 11/01/2015 | 5 |
ASTM E259 – Standard Practice for Preparation of Pressed Powder White Reflectance Factor TransferStandardsfor Hemispherical and Bi-Directional Geometries
1.1 This practice covers procedures for preparing pressed powder transfer standards. These standards can be used in the near-ultraviolet, visible and near-infrared region of the electromagnetic spectrum. Procedures for calibrating the reflectance factor of materials on an absolute basis are contained in CIE Publication No. 44 (2). Pressed powder standards are used as transfer standards for such calibrations because they have a high reflectance factor that is nearly constant with wavelength, and because the geometric distribution of reflected flux resembles that from the perfect reflecting diffuser.
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