Optical: systems and elements – Compound lens system – Microscope
Patent
1996-08-05
1997-11-04
Dzierzynski, Paul M.
Optical: systems and elements
Compound lens system
Microscope
359368, 359388, 359389, 359387, G02B 2106, G02B 2100
Patent
active
056846258
ABSTRACT:
The invention provides a switchable bright-field transmitted-light illumination device for microscopes which provides for in each case two objectives of different apertures in both switch positions a simple automatic illumination arrangement without adjustment of the position and of the opening of the diaphragms. For this purpose, in an illumination device, comprising light source 1, collector 2, field diaphragm 3, aperture diaphragm 4 and basic condenser 7 with removable condenser head 8 or condenser lens element 11, which can be switched in alternatively to the condenser head 8 between the aperture diaphragm 4 and the basic condenser 7, the aperture diaphragm 4 is arranged between the collector 2 and the field diaphragm 3 and is imaged by an intermediate imaging by at least two auxiliary lenses 5 and 6 into a plane 12 conjugate with the aperture diaphragm 4. The basic condenser 7 is thus suitably supplemented in the one switch position by the condenser head 8, in the other switch position by a condenser head 10 and the condenser lens element 11 such that two switchable condenser magnifications are in the ratio of the switchable objective magnifications.
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patent: 5136429 (1992-08-01), Bergner et al.
Karbe Peter
Stankewitz Hans Werner
Dzierzynski Paul M.
Leica Mikroskopie und Systeme GmbH
Sikd-er Mohammad Y.
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