10. Contrast methods for Leica DM4000 M

10.Contrast methods for Leica DM4000 M

10.1Incident light 10.1.1 Bright field (IL)

Switch to the incident light axis (IL) by push- ing the TL/IL function key.

Select the BF (bright field) contrast method Do so by pressing the BF variable key. Alternatively: press the variable button

CHANGE RL .

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

The display indicates BF.

Insert a specimen.

Rotate an appropriate objective into place.

Bring the image into focus using the focus wheel and set the brightness using the INT function key.

The brightness values for each objective are saved.

10.1.2 Dark field (IL)

Switch to the incident light axis (IL) by push- ing the TL/IL function key.

Select the DF (dark field) contrast method by pressing the variable button DF. Alternatively: press the variable button

CHANGE RL .

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

The display indicates DF.

The DF reflector is rotated into the beam path.

Insert a specimen.

Rotate an appropriate objective into place.

Bring the image into focus using the focus wheel and set the brightness using the INT function key.

Notes:

The maximum objective aperture that can be used for dark field is 0.75. All objectives with greater aperture are automatically blocked for this method ("DF" flashes in the display).

When the dark field method is selected, the ap- erture diaphragm is opened fully and cannot be adjusted.

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Leica DM4500P, DM5000B, DM4000M manual Contrast methods for Leica DM4000 M, Dark field IL

DM4500P, DM5000B, DM4000M specifications

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