BS ISO 5-2:2009

Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Coordinate system, terminology and symbols
5 Distinction between ideal and realized parameters
6 Requirements for ISO 5 standard diffuse transmittance
  density
7 Requirements for ISO 5 standard projection transmittance
  density
8 Conformance testing
Annex A (normative) - Diffusion coefficient
Annex B (normative) - Determining conformance with tolerances
Annex C (informative) - Unmatched influx and efflux angles
Bibliography

Describes the geometric conditions for measuring ISO 5 standard diffuse and f/4,5 and f/1,6 projection transmittance densities.

This part of ISO5 specifies the geometric conditions for measuring ISO5 standard diffuse and f/4,5 and f/1,6 projection transmittance densities.

ISO5 standard diffuse density is primarily applicable to measurements of photographic images to be viewed on a transparency illuminator, or viewing box, to be contact printed, or to be projected with a system employing diffuse illumination.

ISO5 standard projection density is primarily applicable to measurements of photographic images to be projected with systems employing optical condensers.

Although primarily intended for the measurement of photographic images, the densitometric methods specified in this part of ISO5 are often applied to optical filters and other transparent materials.