6
the two ridgelines are parallel and overlapping) and the two ridgelines are crossed or
scissors-shaped (as shown in the figure), the ridgeline needs to be adjusted precisely.
Turning the left screw can change the direction of the ridgeline to eliminate cross or
scissors; turning the right screw can change the width of the ridgeline and make the two
ridgelines close together. The basic steps of adjustment are as follows
：
1. Take out the left and right protective caps behind the bridge.
2. Use the provided wrench to turn the left gong wire until the two ridges are parallel.
3. Turn the right gong wire to adjust the thickness of the ridgeline.
4. If the ridge line is still not ideal, repeat steps 2) and 3) until the desired effect is
achieved.
5.
Put on the protective cap.
thin black line Wider black and white lines The width of the black and white lines
is inconsistent
6
．
Correct use of binocular head: The pupillary distance and diopter indication are marked
on the binocular head respectively. Pulling the lens barrel can change the interpupillary
distance to suit the pupil distance of the observer's eyes; rotating the screw sleeve on the
binocular lens barrel can adjust the diopter, and the observer can adjust the diopter.
Both eyes can clearly see the thin and black comparative ridges.
7
．
Application of polarized light (optional), coaxial light (optional), transmitted illumination
(optional): to compare some objects and traces (such as scratch marks), using polarized
light will get better results. Install the polarizer and the analyzer on the insert seat and the
screw under the objective lens respectively, adjust the lighting lamp, rotate the analyzer,
and change the polarization angle until a better polarized light irradiation effect is obtained.
Some objects, such as deep holes, are better illuminated by coaxial lighting on
smooth surfaces. As long as the coaxial light device is screwed into the screw hole below
the objective lens, and the illumination angle and height of the reflector lamp are adjusted,
so that the light emitted by the reflector lamp can directly hit the reflector on the coaxial light
device horizontally, and then the coaxial light illumination can be realized.
Certain objects, such as photographic film, transparent or translucent objects, require
the use of transmitted illumination.
8
．
Photography and photography: Usually, the instrument is in a state of simultaneous
