O
PERATION
M
ANUAL
P
ROMO
®
2000
P
ALAS
®
G
MB
H,
M
ARCH
2010,
V
ERSION
V001032010
24
5.5
Optical
particle
measurement
Scattered
light
procedure
General
test
setup
for
a
counting
procedure
5.6
Terms
of
optical
particle
measurement
•
Scattering:
Diverson
of
light
waves
from
their
original
direction
by
refraction,
reflection
and
diffraction
at
small
particles.
•
Refraction:
Diverson
of
light
waves
with
the
transition
of
a
transparent
medium
to
another.
•
Reflection:
Throwing
back
of
light
waves
at
the
boundary
surface
of
two
media.
•
Diffraction:
Diversion
from
light
waves
from
their
original
direction
at
the
boundary
surface
of
two
me
‐
dia,
if
not
refraction
and
reflection.
•
Absorption:
Weakening
of
the
light
waves
with
the
incidence
at
boundary
surface.
•
Extinction:
Weakening
of
the
light
waves
by
scattering
and
absorption.
Transmission:
Intensity
relationship
with
extinction.
5.7
Determination
of
interaction
relations
Detector
Measuring
volume
Light
source
Particle
flow