Zeiss Axiolab A Especificaciones descargar pdf (Pagina 97)

OPERATION

Axio Lab.A1 Lighting and contrasting method in transmitted light Carl Zeiss

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1 Slide 6x20 with O/4 plate

2 Lower section of circular polarizer

3 Lever for rotating O/4 plate

4 O/4 plate in upper part of the circular polarizer

5 Adjustment slits

Fig. 4-16 Components for circular polarization contrast on conoscopy stand

x An (anisotropic) specimen should not be observed until after the above adjustment.

x Reinsert the specimen to be examined.

In their interference color – dependent on material, specimen thickness and orientation – the specimens

appear constant and independent of stage rotation.

For a high-contrast image with higher objective enlargements (from approx. 20x) the

illumination aperture must be reduced to a value between 0.15 and 0.20, i.e. the aperture

diaphragm must be closed accordingly.

The effect of the O/4 plate (Fig. 4-16/4

) can be undone by either swiveling it out of the light

path or turning it with lever (Fig. 4-16/3) into one of its two click-stop positions.

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Zeiss Axiolab A Especificaciones Pagina 97