Find the most up-to-date version of ASTM E at Engineering ASTM E() E1 Standard Practice for Obtaining Spectrometric Data for Object-Color Evaluation [ASTM International] on *FREE*. ASTM E Standard Practice for Obtaining Spectrometric Data for Object- Color Evaluation. This practice covers the instrumental measurement.
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The results of diffuse measurements made on specimens having broad regular-transmittance factor peaks will depend importantly on the size of the re? It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
More recently, discrete pseudo-monochromatic sources, such as light emitting diodes LED have also been used as sources in colorimetric spectrometers. When the specimens do not have these desired characteristics, departures should be noted.
No other units of measurement are included in this standard. Blocking should be carried out by replacing the specimen axtm an opaque object of the same size and shape as the specimen, placed in the same position.
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ASTM E – Standard Practice for Obtaining Spectrometric Data for Object-Color Evaluation
Already Subscribed to e164 document. Standards Subsctiption may be the perfect solution. The instrument user must assume the responsibility for obtaining the necessary material standards. NOTE 5—When a hemispherical receiver such as an integrating sphere is used, and the specimen is placed? Dust, dirt and s1164 For example, the value of the re? The detector must be stable with time and have adequate responsivity over the wavelength range used.
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Last previous edition approved in as E — Precision and Bias However, for the measurement of? If the spectral interval and bandpass qstm greater than 1 nm then it is recommended that the spectral data be interpolated and then deconvolved 21 down to the 1 nm interval before computing tristimulus values as recommended in Practice E When all regularly that is, specularly re?
In order to avoid implying unnecessary restrictions on instrumentation that can be used, when referencing this practice one should except in those cases of? The geometric arrangement of the viewing beam may be the same as that of the illuminating beam, or may differ, for example, by the use of a hemispherical receiver such as an integrating sphere.
When information on directionality is not required, the several measurements may be averaged. The CIE recommends that this ideal standard of re? Care should be taken not to touch the area to be measured except for application of a suitable cleaning procedure. Colorimetric data are obtained by combining object spectral data with data representing a CIE standard observer and a CIE standard illuminant, as described atsm Practice E This practice is general as to the materials to be characterized for color.
Standard Practice for Obtaining Spectrometric Data for Object-Color Evaluation
Please first log in with a verified email before subscribing to alerts. Exceptions to this applicability are noted. Examples of suitable veri? The detector may be a photoelectric device phototube or photomultipliera silicon photodiode or diode array, or another suitable photodetector.
Tt and the measurement provides the total transmittance factor Tt. We have no amendments or corrections for this standard. Current edition approved June 1, Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend. NOTE e11644 the possible exception of the measurement of unusually structured or?