Resolution and contrast generation - Field diaphragm

3 important questions on Resolution and contrast generation - Field diaphragm

The illumination light that passes the condensor first passes...

Field diaphragm

Closing the diaphragm until only the area of interest is  illuminated...

Minimized the glare by stray-light and light-induced damage outside the observed region.

Field aperture controls... (2)

1. The size of the illuminated area
2. The angles under which the sample is illuminated

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