Patent ID: 9036254
Filing Date: 2015-05-19
Classification: G02B

Abstract:
1. A transmitted light illumination apparatus for light microscopes with a changing effective entrance pupil of an objective, the apparatus comprising a light source adapted to emit an illuminating light beam, a housing, in which the light source is arranged, a holding device for holding a sample to be examined, and at least one diaphragm edge to trim the illuminating light beam, wherein the diaphragm edge extends transversely to an optical axis of a light microscope, which can be positioned in an operating state on the transmitted light illumination apparatus, and wherein a beam path of the illuminating light between the diaphragm edge and the sample which is held by the holding device is free of adjustable beam-focusing components, wherein in order to adapt the beam path of the illuminating light to the effective entrance pupil of the objective means for variable positioning of the diaphragm edge in direction of the optical axis are provided, wherein a position of the diaphragm edge in the direction of the optical axis can be varied irrespectively of a position of the diaphragm edge transversely to the optical axis, assembly means are provided on the housing for assembling a separate sample support table, means are present for determining whether a sample support table is located at the housing, the housing comprises a passage opening, through which the diaphragm edge can be moved in the direction of the optical axis, the holding device is formed in the region of the passage opening of the housing or on a separate sample support table, and a control device is provided which is adapted to position the diaphragm edge in dependence upon at least a determined presence of a sample support table at the housing.