EN ISO 13696:2002

Foreword
Introduction
1 Scope
2 Normative references
3 Terms, definitions and symbols
  3.1 Terms and definitions
  3.2 Symbols and units
4 Test method
  4.1 Principle
  4.2 Measurement arrangement and test equipment
  4.3 Arrangement with high sensitivity
  4.4 Preparation of specimens
5 Procedure
  5.1 General
  5.2 Alignment procedure
  5.3 Measurement procedure
6 Evaluation
  6.1 Determination of the total scattering value
  6.2 Error budget
7 Test report
Annex A (informative) Set-up with a Coblentz sphere
Annex B (informative) Example of test report
Annex C (informative) Statistical evaluation example
Annex D (informative) Example for selection of spacing
Bibliography
Annex ZA (normative) Normative references to
         international publications With their relevant
         European publications

ISO 13696:2002 specifies procedures for the determination of the total scattering by coated and uncoated optical surfaces. Procedures are given for measuring the contributions of the forward scattering and backward scattering to the total scattering of an optical component.ISO 13696:2002 applies to coated and uncoated optical components with optical surfaces that have a radius of curvature of more than 10 m. The wavelength range includes the ultraviolet, the visible and the infrared spectral regions.