Chapter 3 Usage of Components
50
3.4.9 Using the ELWD-S Condenser
Switching the condenser module
The ELWD-S condenser allows BF microscopy and Ph
microscopy. Turn the turret manually to place the
module into the optical path.
Operation:
Turret ring Condenser
Turn until it clicks into
position.
The previous or the next
module enters the optical
path.
The condenser module in the optical path can be
checked through the position display on the front
surface of the turret.
Switching modules in the ELWD-S condenser
Adjusting the aperture diaphragm
When adjusting the aperture diaphragm with the
ELWD-S condenser, operate the aperture diaphragm
open/close lever of the condenser.
Operation:
Aperture diaphragm
open/close lever
Aperture diaphragm
Turn it to the right.
The diameter of the
diaphragm increases.
Turn it to the left.
The diameter of the
diaphragm decreases.
Place the centering telescope into the optical path
and adjust the aperture diaphragm so that the size
of the aperture diaphragm image is 70% to 80%
of the pupil plane of the objective.
70~80
100
Adjust the field diaphragm so that the size of the field diaphragm
image is
70
%
to 80
%
that of the pupil plane of the objective.
Adjusting the aperture diaphragm
Centering of the annular diaphragm
The ELWD-S condenser has a centering knob to
adjust the position of the annular diaphragm used for
Ph microscopy.
Operation:
Annular diaphragm
centering screw
Position of the annular
diaphragm
Turn it clockwise
(tighten).
It moves to the rear.
Turn it counterclockwise
(loosen).
It moves to the front.
By centering the annular diaphragm of the lowest
Ph code, all annular diaphragms can be centered.
Adjusting the position of the annular diaphragm for Ph microscopy
For this adjustment, use the centering telescope. Place the objective having the lowest Ph code in the
optical path, and then, with the ELWD-S condenser, place the annular diaphragm having the same Ph
code into the optical path. Loosen the centering knob clamp screw and adjust the centering knob to
overlap the image of the phase ring of the objective with the image of the annular diaphragm.
Condenser lens
Centering
knob
clamp screw
(both sides)
nnular
diaphragm
centering
screw
(both
sides)
Turret ring
Position
dis
la
perture
diaphragm
open/close
leve
erture dia
hra
m
Objective pupil plane
Phase ring
nnula
diaphragm