Olympus POS Buku Petunjuk - Halaman 7

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Olympus POS Buku Petunjuk
Test Plates
The test plates comprise a 1/4 wave length plate (mica 147mpi) and tint plate (gypsum 530 m//).
These plates, which are used for checking the double refraction and distortion of the specimen and
axial characteristics, are inserted in a slit on the right side of the tube.
tint plate
1/4 wave length plate
Analyzer
The analyzer can be slid out of the optical path, either to the right or to the left.
Moreover, it
rotates through 90° (1 div. = 5°) by means of a rotating lever. At 0°, the oscillation is latitudinal.
In other words, at 0° the polarizer and analyzer are crossed Nicols.
Bertrand Lens
The Bertrand lens can be slid in and out of the optical path by means of the 90° rotatable
handle attached to the middle part of the tube. When the lens is in the optical path, the mark on the
handle points upward. In this case, the interference image, or conoscopic image, formed on
the rear focal plane of the objective lens can be observed through the center of the eyepiece since
the lenses have already been centered.