SIGMA LASER STENT AND TUBE CUTTER
B-8
990-401
Summary of Concept of Subclasses "M"
Time Base
Class
Class -M
AEL for Class 1,
1M
100 seconds
or 30000
seconds
Generally safe, even for
intentional exposure, for the naked
eye and with optical instruments
Safe even for intentional exposure
of the naked eye, potentially
hazardous for exposure with
optical instruments of either
category 1 or 2
AEL for Class 2,
2M
0.25 seconds Safe for accidental exposure, for
the naked eye and with optical
instruments
Safe for accidental exposure,
potentially hazardous for
exposure with optical instruments
of either category 1 or 2
Measurement
Conditions*
(measured power <
AEL)
Condition 1
Condition 2
To account
for possible
use of
Binoculars,
telescopes
Eye loupes,
magnifiers
Unaided eye
Usually
limiting
condition for
Large diameter
well collimated
beams
Divergent
beams
-
Aperture
diameter
50 mm
7 mm
7 mm
Distance
2 m
14 mm
10 cm
b* simplified presentation, strictly only applicable for point sources and for wavelengths in the retinal
hazard region. The 2 m measurement distance is measured from the physical product while 14 mm and
10 cm distance are measured from the position of the apparent source. For other wavelengths and
extended sources the measurement requirements differ and are not discussed here.
