DSH 656 Equivalent measurement setup for the Condition 1 for certain laser beams
http://decisions.iecee.org/icons/ecblank.gif DSH 656
Equivalent measurement setup for the Condition 1 for certain laser beams
Clause 9.1 Tests Clause 9.2 Measurement of laser radiation Clause 9.3 Measurement geometry
60825-1(ed.1);am1;am2 & 60825-1(ed.2)
Standard(s):
IEC 60825-1, Ed 1.2 (2001) & Ed 2.0 (2007)
Sub clause(s):
Clause 9.1 Tests
Clause 9.2 Measurement of laser radiation
Clause 9.3 Measurement geometry
Decision Sheet n°: DSH 656
Subject: Equivalent measurement setup for the Condition 1 for certain laser beams
Key words:
- Condition 1
- Telescoping viewing
- Aperture stop
Approved by the 45th CTL Plenary meeting 2008
Question:
Is it necessary to always use a 50 mm aperture stop in order to fulfil the requirements for the measuring Condition 1?
Decision:
If the laser beam is well collimated so that the entire radiant power is passing through a 7 mm aperture within 2000 mm distance, it is acceptable to use a 7 mm aperture stop for the purpose of testing according to Condition 1.
Note: National Certification Bodies shall provide objective evidence that the whole laser beam is captured with the reduced aperture size.
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