Arrangement and method for illuminating a specimen field in an optical instrument

An arrangement for illuminating a specimen field in an optical instrument for specimen viewing, comprising:

• an illumination device arranged, in a housing, comprising a light source and an illuminating optical system, wherein a position of at one of the light source and the illuminating optical system is adjustable within the illumination device;
• a setting device comprising at least one drive system and configured to positionally adjust said at least one of the light source and the illuminating optical system;
• at least one linkage member connected to said at least one of the light source and the illuminating optical system, wherein the linkage member comprises a coupling member accessible by the setting device from outside the housing;
• at least one measurement device configured to sense at least one parameter of the light generated by the illumination device;
• and
• a control device that is configured to generate positioning commands for positional adjustment of said at least one of the light source and the illuminating optical system by the drive system as a function of the sensed parameter.