Leica DMI6000B, DMI3000B, DMI4000B manual Operation Contrast Methods, Bright Field TL

8. Operation

8.2. Contrast Methods

All of the contrast methods of the Leica DMI4000 B and Leica DMI6000 B can be se- lected and controlled via the variable function buttons and the Leica Application Suite (LAS). The only exceptions are methods that involve components requiring manual control (e.g. sys- tems with manual analyzers). The following sec- tion describes the use of the function buttons on the stand. For instructions on the use of the soft- ware, please refer to the separate manual.

Contrast methods for the Leica DMI3000 B are controlled via the manual condenser and manual objective turret.

Fig. 108 Function buttons (left side of stand)

1variable function buttons

2Open/close aperture diaphragm

3TL/IL switching

4Open/close field diaphragm

5Increase/decrease light intensity

12 3 4 5

Fig. 109 Function buttons (right side of stand)

1variable function buttons

8.2.1 Bright Field (TL)

Leica DMI3000 B:

¥Set the condenser to the bright field position.

¥Remove all other optical components such as analyzers, polarizers or IC prisms from the beam path.

¥Insert a transmitted light specimen.

¥Select your objective

¥Set the brightness at the light potentiometer

¥Focus the image with the focus wheels.

Leica DMI4000 B and Leica DMI6000 B:

Note:

If all positions of the filter turret are occupied, filter cube ÒAÓ can be swapped for filter cube ÒA-TLÓ using the Leica Application Suite (LAS). TL contrast methods are possible with that filter cube.

¥Use the TL/IL function button to switch to trans- mitted light (TL).

¥Select the BF (bright field) contrast method by pressing the variable button BF. Alternatively: press the variable button CHANGE

TL .

(For details on button assignments, please see the identification sheet.)

BF will appear on the LeicaScreen.

Motorized condensers will now move to the bright field position. Coded condensers must be switched manually.

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