DIN EN 61920:2004-07

1 Scope and object
2 Normative references
3 Terms and definitions
4 Symbols
  4.1 General
  4.2 Radiators
  4.3 Receivers
5 Classification
  5.1 General
  5.2 Physical characteristics of radiators
      5.2.1 General
      5.2.2 Ranges of wavelength (criterion 1)
      5.2.3 Ranges of frequency (criterion 2)
      5.2.4 Radiant intensity (criterion 3)
      5.2.5 Angle of radiation (criterion 4)
      5.2.6 Duration of radiation (criterion 5)
      5.2.7 Identification example for a radiator
  5.3 Physical characteristics of receivers
      5.3.1 General
      5.3.2 Ranges of wavelength and selectivity (criterion 6)
      5.3.3 Frequency response (criterion 7)
      5.3.4 Sensitivity (criterion 8)
      5.3.5 Directivity (criterion 9)
      5.3.6 Example of a receiver
  5.4 Tolerances
      5.4.1 Measurement conditions
      5.4.2 Tolerances of data
  5.5 Product groups
  5.6 User areas
  5.7 Graphical representation of IR systems
6 Method for minimizing mutual interferences
7 Marking
8 Relationship between IR basic standard and application
  standards
Annex A (informative) Example for possible priorization
Annex B (informative) Examples of lambda/f-diagrams
Annex C (informative) Survey of standardization activities
         in the field of Infrared
Annex ZA (normative) Normative references to international
         publications with their corresponding European
         publications
Bibliography

Describes classification of IR devices into groups and classes in order to identify and clarify problems caused by mutual interference.