Olympus bx40 Service Manual

U-BI30 B. DESCRIPTION OF MECHANISM
De
JENTSH AND SIEDENTOPF
Binocular tube has the mechanism to adjust the distance between left
and right optical axes to meet the observer's eyes. This mechanism is
Jentsh which changes the distance in
a straight line and Siedentopf which change the distance in an arc.
Each type has merits and demerits.
available in two typical types:
shown below.
The features of each type are as
JENTSH
SIEDENTOPF
Light
path
diagram
N
2
и
Features
The center prism is fixed.
The interpupillary distance
is adjusted by moving the
left and right prisms in
parallel to each other.
-
Less
possibility
of
optical
axis displacement caused by
changing
the
interpupillary
distance.
ㆍ The reticle glass in the
eyepiece
does
not
incline
even if the interpupillary
distance
is
adjusted.
-
The
optical
tube
length
changes
as
a
result
of
the
change
in
the
light
path
length
when
the
interpupillary
distance
is
adjusted.
Compact
design.
The left and right prisms have
the function of a center prism.
The interpupillary distance is
adjusted by moving these prisms
in an arc centering the optical
axis going up from the objective.
The optical tube length is not
changed even if the interpupillary
distance is adjusted.
The interpupillary distance
does not change even if the
eyepiece is pushed during obser-
vation.
The reticle glass in the eye-
piece inclines when the inter-
pupillary distance is adjusted.

Olympus bx40 Specifications

General

Illumination	Transmitted Light
Light Source	6V 30W Halogen lamp
Observation Method	Brightfield
Stage	Mechanical stage
Objectives	Plan Achromat
Focusing	Coaxial coarse and fine focusing knobs
Observation Tube	Binocular or Trinocular (depending on configuration)
Nosepiece	Revolving
Condenser	Abbe condenser (NA 1.25)
Eyepiece	WH10X/22
Magnification	40x - 1000x (depending on objectives)
Diopter Adjustment	Yes (on at least one eyepiece)