• And/or scolded toggles (fig. 4/36) on symbol pull linkage out (
fig. 2/19) (Bertrandlinse switched on)
See into the eyepiece; focus Bertrandlinse with toggle at the linkage (fig. 2/19) and/or with linkage (fig. 4/36), until objective
pupil (lit circle limited surface sharply), aperture diaphragm or contrast modulators sharply he seem.
, Necessary handles observe pupil for setting-up
the lighting would drive through:
e.g.: general control of the correct aperture diaphragm opening. For light field is usually valid:
Aperture diaphragm opening not more largely than objective pupil (aperture diaphragm so far opened that their edge at the edge
of the bright circular area is evenly still visible).
Diameter of the aperture diaphragm opening
not smaller than
½ diameters of the objective pupil
The “correct” opening of the aperture diaphragm represents a compromise between limit values: large opening: high resolution,
good color contrast at the expense of the outline contrast small opening: high outline contrast at the expense of the dissolution
and the color contrast,
Center the aperture diaphragm: The aperture diaphragm is usually centered to the pupil (centering screws fig. 1/9).
Reproducible adjusting of the aperture diaphragm opening (for reproducible contrast) centering the modulators e.g. for phase contrast
•
Bertrandlinse switch off, field observe.
(6) illuminating large fields for objectives with enlargements smaller than 12,5x _____________
For illuminating these fields the overview condensor lens aplanatic lens 0.12 is switched on (fig. 3/32).
Preparation with middle drying system focus.
Annunciator screen picture with condensor lens 0.9 focus and center.
GF-PA 1x at the same time Vergrößerungswechsler and/or shift lever (fig. 4/41) on marking o place. Focus the
picture with this objective with focusing ring at the objective
(Fig. 4/40).
Condensor lens 0.9 against overview condensor lens 0.12 change.
- Handles with the thumb of the left hand (fig. 1/13) after in the back down press. Condensor lens 0.9 releases and drives to
attack downward.
- Condensor lens 0.9 to the left to attack swing out; to it-favourably the right centering screw for aperture diaphragm (fig. 1/9) as if
handles use.
Annunciator screen open, until the edge of their picture disappears evenly at the edge of field.
Regulate 0.12 contrast with tension ring for aperture diaphragm at the condensor lens.
Shift back to condensor lens 0,9:
- Condensor lens 0.9 to attack to the right swivel; right centering screw (fig. 1/9) as if handles use.
- With index finger of the left hand under (fig. 1/13) seizes and condensor lens handles the 0.9 to attack drives upward.
(7) the
work with the objectives REAR ONE 100x
Image field illuminate.
Preparation with middle drying system focus.
Annunciator screen picture with condensor lens 0.9 focus and center.
Immersion objective switch on, always-crave, object sharp place.
, Correct sharpness and centring of the annunciator screen picture close annunciator screen completely (observe field favourably
with factor 0.8 of the Vergrößerungswechslers).
