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ASTM E1651-94(2004)

(Test Method)

Standard Test Method for Total Luminous Reflectance Factor by Use of 30/t Integrating-Sphere Geometry (Withdrawn 2004)

Standard Test Method for Total Luminous Reflectance Factor by Use of 30/t Integrating-Sphere Geometry (Withdrawn 2004)

SCOPE
1.1 This test method covers measurement of total luminous reflectance factor of opaque, nonfluorescent specimens by use of an integrating-sphere reflectometer with illumination at an angle of 30° from the surface normal and diffuse viewing with specular component included.
1.2 This test method is intended to be used for evaluation of total luminous reflectance factor of reflector lighting sheet material. It may be used for evaluation of other material when its specific geometry has been found to be applicable.
1.3 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 and health practices and determine the applicability of regulatory limitations prior to use.
WITHDRAWN RATIONALE
This test method covers measurement of total luminous reflectance factor of opaque, nonfluorescent specimens by use of an integrating-sphere reflectometer with illumination at an angle of 30 from the surface normal and diffuse viewing with specular component included.
Formerly under the jurisdiction of Committee E12 on Color and Appearance, this test method was withdrawn in October 2004. This standard is being withdrawn without replacement due to its limited use by industry.

General Information

Status
Withdrawn
Publication Date
09-Nov-1999
Withdrawal Date
10-Oct-2004
ICS
87.040 - Paints and varnishes
Technical Committee
E12 - Color and Appearance
Drafting Committee
E12.02 - Spectrophotometry and Colorimetry
Current Stage
Ref Project

Relations

Replaces
ASTM E1651-94(1999) - Standard Test Method for Total Luminous Reflectance Factor by Use of 30/t Integrating-Sphere Geometry
Effective Date
10-Nov-1999

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ASTM E1651-94(2004) - Standard Test Method for Total Luminous Reflectance Factor by Use of 30/t Integrating-Sphere Geometry (Withdrawn 2004)ASTM E1651-94(2004) - Standard Test Method for Total Luminous Reflectance Factor by Use of 30/t Integrating-Sphere Geometry (Withdrawn 2004)
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ASTM E1651-94(2004) - Standard Test Method for Total Luminous Reflectance Factor by Use of 30/t Integrating-Sphere Geometry (Withdrawn 2004)
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: E 1651 – 94 (Reapproved 2004)
Standard Test Method for
Total Luminous Reflectance Factor by Use of 30/t
Integrating-Sphere Geometry
This standard is issued under the fixed designation E 1651; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
INTRODUCTION
This test method has a long but undocumented history. The electric lighting industry for many years
used a visual reflectometer with 30° unidirectional illumination and a sphere to collect all the reflected
light so as to obtain a measure of total luminous reflectance factor, specular plus diffuse, for 30/t
geometry. The original visual design was later equipped with a photovoltaic cell and microammeter.
The lighting industry has preferred to maintain this geometry rather than to use a standard CIE
geometry, such as 6/t. In 1975, the original 30/t geometry was incorporated in an instrument of modern
design. This test method documents the calibration and measurement procedures for such an
instrument.
1. Scope E 179 Guide for Selection of Geometric Conditions for
Measurement of Reflection and Transmission Properties of
1.1 This test method covers measurement of total luminous
Materials
reflectance factor of opaque, nonfluorescent specimens by use
E 259 Practice for Preparation of Pressed Powder White
of an integrating-sphere reflectometer with illumination at an
Reflectance Factor Transfer Standards for Hemispherical
angle of 30° from the surface normal and diffuse viewing with
and Bi-Directional Geometries
specular component included.
E 284 Terminology of Appearance
1.2 This test method is intended to be used for evaluation of
E 691 Practice for Conducting an Interlaboratory Study to
total luminous reflectance factor of reflector lighting sheet
Determine the Precision of a Test Method
material. It may be used for evaluation of other material when
E 1345 Practice for Reducing the Effect of Variability of
its specific geometry has been found to be applicable.
Color Measurement by Use of Multiple Measurements
1.3 This standard does not purport to address all of the
E 1347 Test Method for Color and Color-Difference Mea-
safety concerns, if any, associated with its use. It is the
surements by Tristimulus (Filter) Colorimetry
responsibility of the user of this standard to establish appro-
priate safety and health practices and determine the applica-
3. Terminology
bility of regulatory limitations prior to use.
3.1 Definitions in Guide E 179 and Terminology E 284 are
2. Referenced Documents applicable to this test method.
2.1 ASTM Standards:
4. Summary of Test Method
E 177 Practice for Use of the Terms Precision and Bias in
4.1 This test method requires the use of a reflectometer
ASTM Test Methods
equipped with an integrating sphere with an angle of illumi-
nation of 30° to the surface normal and diffuse viewing with
the specular component included. In other respects, the details
This test method is under the jurisdiction of ASTM Committee E12 on Color
of the instrument geometry are as specified in Guide E 179.
and Appearance and is the direct responsibility of Subcommittee E12.02 on
The use of the 30° angle of illumination allows complete
Spectrophotometry and Colorimetry.
collection of flux reflected at angles near the specular angle.
Current edition approved May 1, 2004. Published May 2004. Originally
approved in 1994. Last previous edition approved in 1994 as E 1651 – 94 (1999).
4.2 This test method utilizes only the Y tristimulus function,
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
leading to the measurement of luminous reflectance. In other
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
respects, the spectral characteristics and methodology used are
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. similar to those described in Test Method E 1347. It should be
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
E 1651 – 94 (2004)
noted that, when and if suitable equipment is available, rotated to the R/C (read/calibrate) position, the light beam
spectrophotometric measurement is equally as acceptable as illuminates the specimen, (9), through specimen opening, (8).
the (filter) colorimetric method described in this test method. Total reflectance (consisting of specular and diffuse compo-
nents) is integrated by the sphere and read by the filter/
5. Significance and Use
photocell. The digital display, (11), shows the ratio of this
5.1 Procedures of this test method provide a quantitative reflectance to that stored in memory, displayed in percent.
6.1.2 The optical characteristics of the integrating sphere
measure of total luminous reflectance, which is related to
reflection efficiency of lighting reflectors. This test method is and its coating shall be as recommended in Guide E 179 except
that the angle of illumination shall be 30 6 1° with a maximum
extensively used to assess total reflectance factor of reflector
sheet used in the manufacture of lighting fixtures. aperture angle of 10°. Viewing shall be diffuse, with the
specular component included. The measured area shall be a
circle with area 6.5 cm ; otherwise multiple measurements
shall be made and averaged to achieve an equivalent specimen
area (see 8.2.3).
6.1.3 The spectral responsivity of the illuminator-filter-
receiver combination shall match that of the CIE spectral
luminous efficiency function V (l) when combined with CIE
standard illuminant C if a filter-type reflectometer is used. Use
of spectrophotometric apparatus is allowable if it fulfils the
geometric requirements of 6.1.2.
6.2 Calibration Standards, either supplied by the manufac-
turer or obtained separately. The standards, one white and one
black, must be flat, opaque, glossy ceramic glass or porcelain
en
...

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