3 Operation of Each Part
27
IC Inspection Microscope ECLIPSE L200ND / L200N Instructions
3.14 Pinhole slider
When using the high magnification objectives, placing the pinhole on the optical path gives
deep depth of focus to the image. This is especially effective when viewing contact holes.
Figure-34 Pinhole slider
3.14.1 Attaching the pinhole slider
Remove the cover plate near the indication “PINHOLE” at the right side of the microscope
arm. Attach the pinhole slider adapter instead, using two flat head screws supplied together
with the pinhole slider. Insert the pinhole slider to the adapter. Slide the slider in and out of
the microscope to find two click-stop positions on the slider.
Be sure to center the pinhole before observation.
3.14.2 Placing/removing the pinhole in/from the optical path
• Placing the pinhole in the optical path
Push in the slider to the second click-stop position to place the pinhole in the optical
path.
When the pinhole is in the optical path, opening or closing down the aperture diaphragm
will have no effect on the image since the pinhole aperture is smaller than the aperture
diaphragm stopped down to the limit.
• Removing the pinhole from the optical path
Pull out the slider to the first click-stop position to remove the pinhole from the optical
path and to make the aperture diaphragm effective.
Pinhole slider
adapter
Flat head screws
Pinhole
Pinhole centering
screws
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