
E
Cleaning
Metal
Filters
or
Attenuator
Gratings
This
kind
of
device
is
extremely
fragile
.
A
misalignment
of
the
grating
leads
to
inaccurate
measurements
.
Never
touch
the
surface
of
the
metal
lter
or
attenuator
grating.
Be
very
careful
when
using
or
cleaning
these
devices
.
Do
not
use
cotton-swabs
or
soft-tissues
,
as
there
is
the
danger
that
you
cannot
remove
the
lint
and
that
the
device
will
be
destroyed
by
becoming
mechanically
distorted.
Preferred
Procedure
1.
Use
compressed
air
at
a
distance
and
with
low
pressure
to
remove
any
dust
or
lint.
Procedure
for
Stubborn
Dirt
Do
not
use
an
ultrasonic
bath
as
this
can
damage
your
device
.
Use
this
procedure
particularly
when
there
is
greasy
dirt
on
the
device:
1.
Put
the
optical
device
into
a
bath
of
isopropyl
alcohol,
and
wait
at
least
10
minutes
.
2.
Remove
the
uid
using
compressed
air
at
some
distance
and
with
low
pressure
.
If
there
are
any
streaks
or
drying
stains
on
the
surface
,
repeat
the
whole
cleaning
procedure
.
Cleaning
Procedures
E-13
Содержание 8167A
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Страница 164: ...D Figure D 1 Test Setup for the Wavelength Tests D 4 Performance Tests ...
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