CH10/CH20
B. INSPECTION STANDARD
B-2
1-2 Observation tube
Part
Item
Standard
Method
Binocular
tube
Interpupillary
distance
adjustment
range
53 mm or less at
min. - 75 mm or
more at max.
Set the observation state, insert a thin paper with
graduations at the eye point position and measure
the interpupillary distance.
Interpupillary
distance
working force
3.9 - 9.8N {400 -
1000g}
Tie a string around the sleeve periphery, work the
interpupillary distance to measure the working
force with a tension gauge.
Diopter
difference
compensa-
tion
Compensa-
tion range
±
5 diopter
Turn the diopter ring and check that the scale
goes over the limit.
Optical
axis
Left/right
optical axis
On image surface:
0.15 mm or less in
vertical direction
0.15 mm or less in
outward direction
0.3 mm or less in
inward direction
Observe a specimen whose center can be
identified (e.g., on concentric circles) using the
standard eyepiece (KN0048; with adapter-1) and
4X or 10X objective.
Align the center of specimen with that of visual
field in the right sleeve as the standard, and read
the displacement between centers of the
specimen and the visual field in the left sleeve
using the reticle scale (1 graduation is 0.1 mm.)
of KN0048.
Absolute
optical axis
(right sleeve
only)
0.3 mm or less on
image surface
Set the interpupillary distance to 62 mm, combine
the standard eyepiece (KN0048; with adapter-1),
the microscope frame (product) and the standard
objective (KN0015), and read the displacement
between centers of the specimen and the visual
field in the right sleeve using the reticle scale of
KN0048.
Exit pupil
center
Within 20% of
objective’s exit
pupil diameter
Combine the centering telescope (KN0029), 4X
or 10X objective, and the microscope frame
(product), and read the displacement between the
objective’s exit pupil diameter center and the
cross hairs center of centering telescope.
Tube length Absolute
parfocality
±
0.5 mm or less on
image surface
Combine the standard eyepiece (KN0048; with
adapter-1), the focusing telescope (FT-36), the
microscope frame (product), and the standard
objective (KN0016).
Set the interpupillary distance to 62 mm, and read
the parfocality difference between the reticle in
KN0048 (with adapter-1) and the specimen in
KN0016 using helicoid scale (1 graduation is 0.1
mm.) of KN0048.
