Polarization With The 30X Lens; How To Use The 200X Lens - scope LSU VL-7EX II User Manual

Handheld Microscope Users Guide

Polarization with the 30X Lens

The lights in the 30X lens can be polarized (a process that reduces unwanted reflection/glare)
by pressing the LIGHT/ON button. This should greatly reduce the reflection. You can continue
to switch the LIGHT/ON button on and off to switch between polarized and unpolarized
illumination. Try looking at different objects with polarized and unpolarized light. What
differences do you notice?
Unpolarized/polarized skin Unpolarized/polarized glass slide Unpolarized/polarized watch

How to Use the 200X Lens

Once you have the hang of using the 30X lens, change to the 200X lens to see the same
objects under higher magnification. (Follow instructions for changing lenses in previous section.)
You will find that the 30X is best for looking at certain larger items, such as fingerprints, rocks,
etc., but the 200X will allow much closer examination of smaller objects, such as salt crystals,
cells, and clothing fibers. To adjust the focus with the 200X lens, twist the white, scalloped
(having a pattern of semicircles) ring.
The 200X has a fine focus mechanism due to the smaller field of view of this lens. This means
that the higher the magnification, the smaller the area (field) the lens can view at one time. For
example, you can see an entire fingerprint pattern with the 30X, but you will only see part of a
few ridges with the 200X.
Finger 30x Finger 200x
The 200X works the same way as the 30X—you touch the
object with the tip of the lens housing to get a focused image.
In this case, the tip of the lens is a clear dome with a small hole
in it. The actual lens is inside this plastic housing, and it "sees"
whatever is lined up with the hole in the plastic. (This image
shows how the lens is focused by twisting the scalloped ring.)
200X lens tip with hole
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