Neither the international laser safety standard IEC 60825-1 Edition 3.0 nor the standard ANSI Z136.1-2014 provide specific rules on how to apply the pulse reduction factor C5 (resp. CP) to irregular pulse trains, featuring both varying peak power as well as varying pulse duration. Without specific guidance, the analysis has to be performed based on restrictive approaches, such as counting all pulses and giving them the same weight, even the ones with smaller peak power and lower energy. Preliminary work, presented at the ILSC 2017, focused on pulse trains with varying peak power. The present study provides guidance on how to analyze irregular pulse patterns - both in terms of peak power and pulse duration - in a less restrictive way.

1.
International Electrotechnical Commission
(
2014
)
IEC 60825-1 Ed. 3.0: Safety of laser products – Part 1: Equipment classification and requirements
.
2.
ANSI Z136.1 Safe Use of Lasers
(
2014
)
Laser Institute of America
.
3.
Schulmeister
K.
 (
2013
),
The upcoming new editions of IEC 60825-1 and ANSI Z136.1 – Examples on Impact for Classification and Exposure Limits
;
ILSC 2013 paper #C102.
Google Scholar
 
4.
Schulmeister
K.
 (
2016
),
The new edition of the international laser product safety standard IEC 60825-1, White Paper, Seibersdorf Labor GmbH
, download available at https://laser-led-lamp-safety.seibersdorf-laboratories.at/no_cache/downloads.
Google Scholar
 
5.
Schulmeister
K.
 (
2015
), Analysis of pulsed emission under Edition 3 of IEC 60825-1; ILSC 2015 paper #202.
6.
International Electrotechnical Commission
(
2017
), IEC 60825-1:2014/ISH1:2017, Interpretation sheet 1.
7.
Jean
M.
,
Schulmeister
K.
,
Heußner
K.
 &
Frederiksen
A.
 (
2017
),
Computer modelling to support laser safety analysis of irregular pulse trains
,
Proceedings of ILSC 2017
, paper #304.
Google Scholar
 
8.
Jean
M.
 &
Schulmeister
K.
 (
2017
)
Validation of a computer model to predict laser induced retinal injury thresholds
,
J Laser Appl.
029
,
032004
.
https://doi.org/10.2351/1.4997831
Google Scholar
Crossref
Search ADS
 
9.
Lund
D.J.
,
Edsall
P.
 &
Stuck
B.E.
 (
2001
)
Ocular hazards of Q-switched blue wavelength lasers
,
Proc. of SPIE
4246
,
44
–
53
.
https://doi.org/10.1117/12.426722
Google Scholar
Crossref
Search ADS
 
10.
Atchison
D.A.
 &
Smith
G.
 (
2000
)
Optics of the Human Eye
,
Butterworth-Heinemann
:
Edinburgh
.
Google Scholar
 
11.
Sliney
D.H.
,
Mellerio
J.
,
Gabel
V.P.
 &
Schulmeister
K.
 (
2002
)
What is the meaning of threshold in laser injury experiments?
Health Phys
82
:
3
.
https://doi.org/10.1097/00004032-200203000-00006
Google Scholar
 
12.
Stuck
B.E.
 (
1984
)
Ocular susceptibility to laser radiation: human vs. rhesus monkey, Chapter 4 in Handbook of laser bioeffects assessment – Volume 1 – Bioeffects data, Letterman Army Institute of Research
,
San Francisco CA
.
Google Scholar
 
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