ISO 10526-2007 cor1-2008 PDF

Full title and description

ISO 10526:2007 CIE standard illuminants for colorimetry — with Corrigendum 1 (2008). This document defines the CIE standard illuminants A and D65 (their relative spectral power distributions and intended use for colorimetric calculations) and was issued with a corrigendum in 2008 that changed the reference number to ISO 11664-2.

Abstract

ISO 10526:2007 specifies the numerical relative spectral power distributions for two primary CIE standard illuminants used in colorimetry — illuminant A (incandescent/tungsten-like) and illuminant D65 (average daylight) — giving tabulated values (typically at 1 nm intervals over the visible/near‑UV range) and guidance on their intended application in colorimetric computations. The 2008 corrigendum (Cor.1:2008) updates the bibliographic/reference numbering and resulted in the standard being published as part of the ISO 11664 series.

General information

• Status: Withdrawn (superseded/revised; see ISO/CIE 11664-2:2022).
• Publication date: ISO 10526:2007 published October 2007; corrected version (Corrigendum 1) published November 2008.
• Publisher: International Organization for Standardization (ISO), prepared in cooperation with the CIE technical committee.
• ICS / categories: 17.180.20 (Colours and measurement of light).
• Edition / version: Edition 1 (2007) with Corrigendum 1:2008; later renumbered as ISO 11664-2.
• Number of pages: 14 pages (original ISO record).

Scope

ISO 10526:2007 provides standard definitions and numerical tables for two CIE standard illuminants (A and D65) to be used in colorimetric calculations: illuminant A to represent typical domestic/incandescent tungsten-filament lighting and illuminant D65 to represent average daylight (nominal correlated colour temperature ≈ 6500 K). Values for the relative spectral power distributions are given (commonly at 1 nm intervals over the 300 nm–830 nm range in the published tables) and the document explains intended applications and limitations of these illuminants in colorimetry.

Key topics and requirements

• Definition and tabulation of the relative spectral power distribution (SPD) for CIE standard illuminant A (Planckian-like, ≈2856 K).
• Definition and tabulation of the relative SPD for CIE standard illuminant D65 (nominal daylight, ≈6500 K).
• Numeric SPD values provided at fine wavelength intervals (typical published tables use 1 nm steps across the defined wavelength range).
• Guidance on when to use illuminant A versus D65 in colorimetric calculations and notes on known daylight variability.
• Corrigendum action that reclassified/renumbered the document into the ISO 11664 series (bibliographic/reference update).

Typical use and users

Used by color scientists, metrology laboratories, manufacturers of lighting, displays, printers, paints, textiles and coatings, digital imaging and photography professionals, standards writers, and researchers who require standardized illuminants to compute tristimulus values, perform color matching, produce color specifications, or calibrate measurement equipment. The illuminant tables are a reference for any application where a defined spectral illuminant is required for reproducible colorimetric results.

Related standards

ISO 10526:2007 was published within the ISO/CIE colorimetry series and later renumbered as ISO 11664-2. Related parts of the ISO/CIE 11664 series include Part 1 (CIE standard colorimetric observers), Part 3 (CIE tristimulus values), and Part 4 (CIE 1976 L*a*b* colour space); the series provides the normative basis for colorimetric observers, illuminants, computation of tristimulus values and color spaces. The 2007/2008 edition was subsequently revised by ISO/CIE 11664-2:2022.

Keywords

CIE standard illuminants; illuminant A; illuminant D65; spectral power distribution (SPD); colorimetry; ISO 10526; Corrigendum 1:2008; ISO 11664-2; tristimulus values; color measurement.

FAQ

Q: What is this standard?

A: ISO 10526:2007 (with Corrigendum 1:2008) defines the numerical spectral power distributions and intended usage of two CIE standard illuminants (A and D65) for use in colorimetric calculations; it was incorporated into the ISO 11664 series.

Q: What does it cover?

A: It covers the definitions and tabulated numerical values of the relative spectral power distributions for illuminants A and D65, guidance on their intended use in colorimetry, and notes on daylight variability and conventions (values commonly provided at 1 nm intervals over the published wavelength range).

Q: Who typically uses it?

A: Laboratories and professionals in color science, lighting, digital imaging, printing, paints/coatings, textiles, display manufacturing, and standards bodies—anyone who needs reproducible reference illuminants for computing tristimulus values or calibrating color measurement equipment.

Q: Is it current or superseded?

A: ISO 10526:2007 (and its Corrigendum 1:2008) has been withdrawn in its original form and renumbered/revised within the ISO/CIE 11664 series; a later edition ISO/CIE 11664-2:2022 is the current/revised part for standard illuminants.

Q: Is it part of a series?

A: Yes — it forms part of the ISO/CIE Colorimetry series (ISO/CIE 11664), which includes parts addressing standard observers, illuminants, tristimulus values and standardized colour spaces.

Q: What are the key keywords?

A: CIE standard illuminants, illuminant A, illuminant D65, spectral power distribution, colorimetry, tristimulus, ISO 10526, ISO 11664-2, Corrigendum 1:2008.