BS IEC 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

Defines the requirements, and provides an adapted hazard specific guidance and categorization scheme for the safe use of visible optical sources that are within the scope of IEC 60825-1, but used exclusively for transmission of information to the human eye. These application-related sources can be categorized into: - Type 1: safe for intended viewers and personnel in manufacturing and service activities; - Type 2: safe for intended viewers only (i.e. protective measures are required for users engaged in manufacturing, service and maintenance activities). Applications of sources that cannot be categorized into either type must be treated in accordance with IEC 60825-1.