IEC TS 60825-6:1999

Foreword
      Introduction
1 Scope and object
2 Normative references
3 Definitions
4 Manufacturing requirements
5 Labelling
6 Tests and measurements for categorization and labelling
      6.1 General
      6.2 Determination of the apparent source size
      6.3 Determination of the angular subtense
      6.4 Measurements of optical radiation
      6.5 Nominal ocular hazard distance
      6.6 Repetitively pulsed, modulated or scanned radiation
      6.7 Simplified categorization procedure
Figure 1 - MPE-related maximum allowable luminous intensities of visible
           DEs in Type 1
Figure B.1 - Examples of modified cosine distributions
Figure B.2 - Measurement cone: different radiant intensities for the
             same MPE corresponding to the spatial distribution of the
             radiation
Annex A (informative) Rationale
Annex B (informative) Conversion of the maximum permissible exposure
                      (MPE) limits into luminous intensities of LEDs

The objectives of this technical specification are:- to protect persons from optical radiation arising from products incorporating visible diode emitter sources, such as displays, indicators, electronic signs and signals;- to lay down requirements for manufacturers and installers, in order that procedures can be established and information supplied to enable correct precautions to be taken;- to ensure adequate warning of hazards associated with accessible optical radiation from visible sources;- to reduce the potential for injury by minimizing unnecessary optical radiation, to give improved control of optical radiation through protective features, and to provide safe usage of products by specifying user control measures.