Leica TL RCI™: Methods in Transmitted Light

Vertical bright-field illumination

Suitable for stained amplitude specimens with sufficient contrast.

The light beams are deflected vertically through the specimen. This results in an accurate bright field with maximum brightness.

Inclined transmitted light

Suitable for semitransparent, opaque speci- mens such as foraminifera and fish eggs. Move the deflection mirror until the desired data are visible.

Single-sided dark field

Suitable for fixed specimens and fine struc- tures.

The flatter the angle at which the light beams are deflected into the specimen plane, the darker the substrate appears. A dark field-like transmitted light is created. Outlines, fine edges and structures are bright, in contrast with the dark background, through diffraction of the light beams on the dark background.

Leica M-series

User Manual

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Page 99
Image 99
Leica M205 FA Leica TL RCI Methods in Transmitted Light, Vertical bright-field illumination, Single-sided dark field