ISO 10526-2007 比色法用CIE标准光源.pdf

标准号：ISO 10526-2007
实施状态：作废
中文名称：比色法用CIE标准光源
英文名称：CIE standard illuminants for colorimetry
发布日期：2007-10
代替标准：ISO 10526-1999;ISO/CIE FDIS 10526-2007
采用标准：BS ISO 10526-2008,IDT;CIE S 014-2-2006,IDT
起草单位：ISO
标准简介：This International Standard specifies two illuminants for use in colorimetry. The illuminants,
which are defined in clauses 4 and 5 of this International Standard, are as follows:
a) CIE standard illuminant A
This is intended to represent typical, domestic, tungsten-filament lighting. Its relative spectral
power distribution is that of a Planckian radiator at a temperature of approximately 2 856 K.
CIE standard illuminant A should be used in all applications of colorimetry involving the use of
incandescent lighting, unless there are specific reasons for using a different illuminant.
b) CIE standard illuminant D65
This is intended to represent average daylight and has a correlated colour temperature of
approximately 6 500 K. CIE standard illuminant D65 should be used in all colorimetric
calculations requiring representative daylight, unless there are specific reasons for using a
different illuminant. Variations in the relative spectral power distribution of daylight are known
to occur, particularly in the ultraviolet spectral region, as a function of season, time of day,
and geographic location. However, CIE standard illuminant D65 should be used pending the
availability of additional information on these variations.
Values for the relative spectral power distribution of CIE standard illuminants A and
D65 are given in Table 1 of this International Standard. Values are given at 1 nm intervals
from 300 nm to 830 nm.
The term "illuminant" refers to a defined spectral power distribution, not necessarily
realizable or provided by an artificial source. Illuminants are used in colorimetry to compute
the tristimulus values of reflected or transmitted object colours under specified conditions of
illumination. The CIE has also defined illuminant C and other illuminants D. These illuminants
are described in Publication CIE 15:2004 but they do not have the status of primary CIE
standards accorded to the CIE standard illuminants A and D65 described in this International
Standard. It is recommended that one of the two CIE standard illuminants defined in this
International Standard be used wherever possible. This will greatly facilitate the comparison
of published results.
It is noted that in the fields of graphic arts and photography extensive use is also made
of CIE illuminant D50.
In most practical applications of colorimetry, it is sufficient to use the values of CIE
standard illuminants A and D65 at less frequent wavelength intervals or in a narrower spectral
region than defined in this Standard. Data and guidelines that facilitate such practice are
provided in Publication CIE 15:2004, together with other recommended procedures for
practical colorimetry.
The term "source" refers to a physical emitter of light, such as a lamp or the sky. In
certain cases, the CIE recommends laboratory sources that approximate the spectral power
distributions of CIE illuminants. In all cases, however, the definition of a CIE recommended
source is secondary to the definition of the corresponding CIE illuminant, because of the
possibility that, from time to time, new developments will lead to improved sources that
represent a particular illuminant more accurately or are more suitable for laboratory use.
Subclause 6.1 of this International Standard describes CIE source A, which is
recommended for laboratory realizations of CIE standard illuminant A. At present, there is no
CIE recommended source representing CIE standard illuminant D65
文件格式：PDF
文件大小：321.24KB
文件页数：24
（以上信息更新时间为：2019-11-22）



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