Use Of Eye Shields; Centering The Condenser; Effects Of The Field Diaphragm - Optika B-510 Serie Bedienungsanleitung

10.8 Use of eye shields

• Use with eyeglasses
Fold rubber eyeshields with both hands. Folded eyeshields avoid
scratching the lenses of eyeglasses. (Fig. 60)
• Use without eyeglasses
Raise eye shields and observe at the microscope placing eyes
to the shields, avoiding external light to disturb the observation.
(Fig. 61)

10.9 Centering the condenser

1. Place the specimen on the stage, insert 10x objective into the
light path and focus.
2. Insert the front lens of the swing-out condenser ①. (Fig. 62)
3. Rotate the field diaphragm ring ② in counterclockwise
direction, to fully close the diaphragm.
4. Rotate the condenser height adjustment knob ③ to focus the
edges of the diaphragm.
5. Rotate the two centering screws ④ to bring the bright spot in
the center of the field of view.
6. Gradually open the diaphragm. The condenser is centered
when the diaphragm image is symmetrical to the field of view.
7. In normal use, open the diaphragm until it circumscribes the
field of view.

10.10 Effects of the field diaphragm

Field diaphragm adjusts the illuminated area to obtain a high
contrast image.
Set the diaphragm according to the objective in use until it
circumscribes the field of view, in order to eliminate unnecessary
light to eyepieces. (Fig. 63)
③
②
Page 41
④
①
F ig. 60 F ig. 60
F ig. 61 F ig. 61
F ig. 62 F ig. 62
F ig. 63 F ig. 63