Transmitted-Light Stands, Bright And Dark Field; Swinging-Arm Stand Esd - Leica M-Series User Manual

Assembly
Transmitted-light stand for bright and dark field
The illuminator of the transmitted-light stand for bright and dark
field consists of a fibre-optic light guide and a light source.
Read and respect the safety directions provided
by the manufacturer of the light source
Fit the side-faced column to the transmitted-light base as
described on page 18.
Fit the microscope carrier and the stereomicroscope as
described on page 18.
Connect the fibre-optic light guide to the stand and to the
light source.
Starting up
Before using the light source, read the user manual for it.
Transmitted light, bright field
• Bright field is suitable for examining translucent objects
having contrasting structures. The object is directly
illuminated from below and is seen in its natural colours
against a bright background.
Transmitted light, dark field
• In the dark-field technique, the light from the source meets
the object very obliquely from below. Only rays which are
reflected or refracted at interfaces reach the objective,
so edges and structural elements appear bright on a dark
background, even if the contrast of the original object was
extremely poor.
22
To obtain bright-field illumina-
tion, push the knob fully in.
To obtain dark-field illumination,
pull the knob fully out.

Swinging-arm stand ESD

The swinging-arm stand ESD is of conducting material (surface
resistance 10 11 Ohm/square, discharge time <2 seconds
from 1000V to 100V). Two sockets for connecting 4mm-diameter
ground cables are provided on the base.
Assembly
Safety ring column
The safety ring secures the instrument and must
always be fixed beneath the cross-member.
Cross-member column
Swinging-arm stand with foot
Introduce 4 Allen screws into
the base from beneath and
secure them to the end of the
column.
Slide the safety ring down the
column.
Tighten its clamping screw.
Lower the cross-member on to
the safety ring.
Tighten the clamping screw.