Axiolab A
Carl Zeiss
B 40-015 e 06/99
3-11
Uniaxial Crystals
If the optical axis of a uniaxial crystal is oriented parallel to the observation direction, a dark cross which
can be surrounded by concentric interference rings (depending on birefringence and specimen thickness)
becomes visible in the conoscopic observation mode. These interference rings are also called isochromats
(from the Greek isos = equal and chroma = color).
The cross is maintained when the stage is turned. Observe the NE quadrant of the cross (1
st
quadrant;
counting is made counterclockwise).
If you use the
λ
-compensator:
•
After insertion of the
λ
-compensator, the following appears in the first and third quadrant near the
center of the dark cross:
−
yellow = optically negative
−
blue = optically positive
Biaxial Crystals
If biaxial crystals show a cross in conoscopic observation which is resolved into two hyperbola legs when
the stage is turned, the acute bisectrix (1
st
center line) is oriented parallel to the observation direction.
Turn the stage until the dark hyperbola legs (isogyres) are in the first and third quadrant.
If you use the
λ
-compensator:
•
The following appears after insertion of the
λ
-compensator:
−
yellow = optically negative
−
blue = optically positive
Fig. 3-8
Determine the optical character of crystals
☞
If one optical axis of a biaxial crystal is oriented parallel to the observation direction, only one
hyperbola leg is visible in conoscopic observation, the vertex of which lies in the center of the
field of view. When the stages are turned, the hyperbola leg moves around its vertex. The
determination of the optical character is performed in the same way.
Содержание Axiolab A
Страница 1: ...Axiolab A Reflected Light Microscope Operating Manual...
Страница 10: ...Carl Zeiss Axiolab A X B 40 015 e 06 99 Overall View of the Axiolab A Reflected Light Microscope...
Страница 16: ...Carl Zeiss Axiolab A 1 6 06 99 B 40 015 e Fig 1 3 Axiolab A microscope configurations...
Страница 18: ...Carl Zeiss Axiolab A 1 8 06 99 B 40 015 e Fig 1 4 Axiolab A accessories 1 of 2...
Страница 20: ...Carl Zeiss Axiolab A 1 10 06 99 B 40 015 e Fig 1 4 Axiolab A accessories 2 of 2...
Страница 26: ...Carl Zeiss Axiolab A 1 16 06 99 B 40 015 e Fig 1 5 Axiolab A function elements 1 of 2...
Страница 27: ...Axiolab A Carl Zeiss B 40 015 e 06 99 1 17 Fig 1 5 Axiolab A function elements 2 of 2 1 1 2...
Страница 34: ...Carl Zeiss Axiolab A 1 24 06 99 B 40 015 e...
Страница 36: ...Carl Zeiss Axiolab A 2 2 B 40 015 e 06 99...
Страница 44: ...Carl Zeiss Axiolab A 3 2 B 40 015 e 06 99...
Страница 68: ...Carl Zeiss Axiolab A 4 2 B 40 015 e 06 99...
Страница 74: ...Carl Zeiss Axiolab A A 2 B 40 015 e 06 99...