IEC TS 60825-7:2000

FOREWORD
INTRODUCTION
1 Scope and object
2 Normative references
3 Definitions
4 Manufacturer's requirements
      4.1 Engineering specifications
             4.1.1 General remarks
             4.1.2 Modification
             4.1.3 Fault analysis
             4.1.4 Limited emission duration
             4.1.5 Automatic power reduction
             4.1.6 Infrared pass filter
             4.1.7 Transmission aperture
             4.1.8 Requirements for Class 3B products
      4.2 Provision of information for installation and
             use
5 Labelling
      5.1 General
      5.2 Class 1
      5.3 Class 3A
      5.4 Class 3B
      5.5 Warning for infrared LED radiation
6 Tests and measurements for classification
      6.1 Generalbution of the radiation
      6.2 Determination of the apparent source size
             6.2.1 General
             6.2.2 Measurement of the dimension of the
                      apparent source
      6.3 Determination of the angular subtense
      6.4 Measurements and classification
      6.5 Nominal ocular hazard distance
      6.6 Repetitively pulsed, modulated or scanned
             radiation
      6.7 Simplified classification procedure for
             continuously emitting sources with wavelengths
             between 860 nm and 960 nm
Annex A (informative) Rationale
Annex B (informative) Conversion of AEL and MPE limits into
                      radiation intensities of IREDs
Figure 1 - Class 1-related maximum allowable radiant
           intensities of IR-sources
Figure 2 - Class 3A MPE-related maximum allowable radiant
           intensities of IR-sources
Figure B.1 - Examples of modified cosine distributions with:
             m = 1 (ideal Lambertian source), m = 4,8 for
             gHW = 30degree and m = 45,3 for 10 degree
             half-intensity angle
Figure B.2 - Measurement cone: different radiant
             intensities for the same MPE corresponding to
             the spatial distribution of the radiation

The object of this technical specification is as follows:- to protect persons from exposure to hazardous infrared optical radiation, resulting from products used for free air infrared data transmission, remote control, surveillance;- to lay down requirements, for both user and manufacturer, to establish procedures and supply information so that proper precautions can be adopted;- to ensure adequate warning to individuals of hazards associated with accessible optical radiation from products with infrared optical sources, through signs, labels and instructions;- to reduce the possibility of injury by minimizing unnecessary accessible radiation, and to give improved control of the optical radiation emitted by products with infrared optical sources, through protective features and also to provide safe usage of products.