3
Operation of Each Part
17
IC Inspection Microscope ECLIPSE L200ND / L200N Instructions
3.5
Interpupillary distance adjustment
Adjust the interpupillary distance to observe a sample with both eyes.
Figure-18 Interpupillary distance adjustment
1.
Perform the diopter adjustment and focus on the image with the 10
×
objective.
2.
Adjust the interpupillary distance so that the viewfield for each eye is at the same
position on the sample.
3.6
Aperture diaphragm
The aperture diaphragm adjusts the numerical aperture (N.A.) of the illumination system,
and plays an important part in determining image resolution, contrast and depth of focus.
3.6.1 Adjusting the size of the aperture diaphragm
When adjusting the size of the aperture diaphragm for episcopic illumination, use the
episcopic aperture diaphragm control buttons. For diascopic illumination, use the aperture
diaphragm lever for diascopic illumination.
1.
Remove one eyepiece and look into the open sleeve.
Í
Inside, you can see the exit pupil of the objective as a bright circle.
2.
Adjust the size of the aperture diaphragm image to the appropriate size.
Í
Generally, the aperture diaphragm is to be stopped down to 70 to 80% of the objective N.A.
Stopping down the aperture diaphragm excessively will lower the image resolution. The
aperture should not be smaller than 60% of the objective N.A.
Episcopic aperture
diaphragm control
buttons
Aperture diaphragm
lever for diascopic
illumination
Figure-19 Aperture
diaphragm
Merge the viewfields into one.
Exit pupil of the
objective
Image of the
aperture
diaphragm
100%
70 to 80%
The appropriate size of the aperture diaphragm
Содержание ECLIPSE L200ND / ECLIPSE L200N
Страница 1: ...M513E 09 3 NF 2 2 4 IC Inspection Microscope ECLIPSE L200ND L200N Instructions ...
Страница 2: ......