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    ASTM E2387-19

    Standard Practice for Goniometric Optical Scatter Measurements
    • 발행일 : 2019-11-01
    • 발행기관 : ASTM
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분야 06.01 : 페인트-화학적, 물리적, 광학적특성 시험; 현상
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1.1 This practice describes procedures for determining the amount and angular distribution of optical scatter from a surface. In particular it focuses on measurement of the bidirectional scattering distribution function (BSDF). BSDF is a convenient and well accepted means of expressing optical scatter levels for many purposes. It is often referred to as the bidirectional reflectance distribution function (BRDF) when considering reflective scatter or the bidirectional transmittance distribution function (BTDF) when considering transmissive scatter.

1.2 The BSDF is a fundamental description of the appearance of a sample, and many other appearance attributes (such as gloss, haze, and color) can be represented in terms of integrals of the BSDF over specific geometric and spectral conditions.

1.3 This practice also presents alternative ways of presenting angle-resolved optical scatter results, including directional reflectance factor, directional transmittance factor, and differential scattering function.

1.4 This practice applies to BSDF measurements on opaque, translucent, or transparent samples.

1.5 The wavelengths for which this practice applies include the ultraviolet, visible, and infrared regions. Difficulty in obtaining appropriate sources, detectors, and low scatter optics complicates its practical application at wavelengths less than about 0.2 µm (200 nm). Diffraction effects start to become important for wavelengths greater than 15 µm (15 000 nm), which complicate its practical application at longer wavelengths. Measurements pertaining to visual appearance are restricted to the visible wavelength region.

1.6 This practice does not apply to materials exhibiting significant fluorescence.

1.7 This practice applies to flat or curved samples of arbitrary shape. However, only a flat sample is addressed in the discussion and examples. It is the user’s responsibility to define an appropriate sample coordinate system to specify the measurement location on the sample surface and appropriate beam properties for samples that are not flat.

1.8 This practice does not provide a method for ascribing the measured BSDF to any scattering mechanism or source.

1.9 This practice does not provide a method to extrapolate data from one wavelength, scattering geometry, sample location, or polarization to any other wavelength, scattering geometry, sample location, or polarization. The user must make measurements at the wavelengths, scattering geometries, sample locations, and polarizations that are of interest to his or her application.

1.10 Any parameter can be varied in a measurement sequence. Parameters that remain constant during a measurement sequence are reported as either header information in the tabulated data set or in an associated document.

1.11 The apparatus and measurement procedure are generic, so that specific instruments are neither excluded nor implied in the use of this practice.

1.12 For measurements performed for the semiconductor industry, the operator should consult Guide SEMI ME 1392.

1.13 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.

1.14 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
국제분류(ICS)코드 17.180.30 : 광학 측정 기구
페이지수 14
Edition 19

이력정보

No. 표준번호 표준명 발행일 상태
1 ASTM E2387-19상세보기 Standard Practice for Goniometric Optical Scatter Measurements 2019-11-01 표준
2 ASTM E2387-19 REDLINE상세보기 Standard Practice for Goniometric Optical Scatter Measurements 2019-11-01 표준
3 ASTM E2387-05(2011)상세보기 Standard Practice for Goniometric Optical Scatter Measurements 2011-07-01 구판
4 ASTM E2387-05상세보기 Standard Practice for Goniometric Optical Scatter Measurements 2005-01-01 구판

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