Olympus CHA User Manual

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VI. OPTICAL DATA
Objective
Type
Achromat
Magnification 4X lOX S40X Sl00X'
NA 0.10 0.25 0.65 1.30
W.D.(mm)
19.87 5.40 0.39 0.11
Focal length
(mml 29.20 15.98 4.31 1.81
Resolving power**{J-L)
3.4 1.3 0.52 0.26
Remarks
Spring- Spring-
Eyepiece loaded loaded
WFlOX
Total magnification 40X 100X 400X 1000X
(Field
number
Focal depth (Il) 172.5 27.60 3.03
0.66
18)
Field of view (mm) 4.5
1.8
0.45 0.18
.. Immersion objective.
*·The resolving power is obtained if the objective is used with the fully opened aperture
diaphragm.
• Working distance: The distance
from the specimen or cover glass to the nearest point
of the objective.
• Numerical aperture: The N.A. represents a performance number which could be
compared to the relativ(~ aperture of a camera lens. The quantity
of light which the objective receives from the object- increases with
the square of the performance number.
• Resolving power:
The resolving power of a lens is measured by its ability to separate
two points.
• Focal
depth: The distance between the upper and lower limits of sharpness in the
image
formed by an optical system. As you stop down the aperture
iris diaphragm, the focal depth becomes deeper. The larger the N.A.
of the objective the shallower the focal depth.
• Field number: A number that represents the diameter in mm of the image of the
field diaphragm that is formed by the lens in front of it.
• Field-of-viewdiameter: The actual size of the field of view in mm.
VII. TROUBLESHOOTING
Troubles Causes
Remedies
1. Optical System
a)
Field of view is cut off, or
Nosepiece did not change properly. Slightly rotate the nosepiece until
illuminated irregularly.
it clicks into position.
Condenser is not correctly mounted
Re-insert the condenser all the way.
on the ring
mount.
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Olympus CHA Specifications

General

Brand	Olympus
Model	CHA
Category	Microscope
Language	English