Zeiss Axioplan Universal microscope Betriebsanleitung PDF herunterladen (Seite 12)

B 40 - 017 e / 12.96

4 Instructions for use

4.3.3 Working in circularly polarized light.

The

Axiolab Pol

Axioplan 2 Pol

and

Axio-

phot 2 Pol

microscopes permit the universal ro-

tary stage to be used also for work in circularly

polarized light. For this, the circular polarizer D

consisting of a polarizer and two /4 plates

must be used. The polarizer and one of the /4

plates is used in the place of the standard po-

larizer. The second /4 plate is inserted in the

compensator mount. Before doing so, adjust

the polarizer and the analyzer so that they are

at a 90° angle to each other. Align the upper

/4 plate to the lower one until dark position is

reached without adjusting the objective. Cir-

cularly polarized light can be used in conjunc-

tion with the universal rotary stage to precisely

measure the angle of the optical axes 2 V in

birefringent, optically biaxial crystals, for exam-

ple. If you wish to work in linearly polarized light,

remove the two /4 plates from the beam

path.

Note:

For details on the use of circularly polar-

ized light, please refer to Zschach [15].

Example 3:Measuring the angle 2 V of the optical

axis of a biaxial crystal in circularly

polarized light

Proceed as described in

example 2

(steps 1 to

10).

Switch in the 50x/0.60 objective.

Switch in the Bertrand lens (focus

Axioplan

mi-

croscopes).

Use the graduated circle and the vernier

(Fig. 3/

) to measure the optical axis by tilting

about A

The axial directions can be identified

by the two circular, dark zones with the exit

point of the optical axes in their centers .

Note:

If only one optical axis is located within

the tilting range about A

, proceed as

described in

example 1

1 2 ... 7 8 9 10 11 12 13 14 15 16 17

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