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US 4,363,532 AGranted
Automatic substage illumination for microscopes
AssigneeCarl-Zeiss-Stiftung
InventorKlaus Weber
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AssigneeCarl-Zeiss-Stiftung
InventorKlaus Weber
Estimating the term…
Automatic substage illumination for microscopes which consists of a stop turret which is mechanically coupled with the lens turret. Field stops and aperture stops adapted to the lens components are arranged below the stage of the microscope in replaceable manner, each on a separate disk, and upon the switching of the lens turret they are moved along by a rotary knob arranged on the outside of the microscope. The aperture-stop turret is located directly in the rear focal plane of the condenser and in at least one switched position bears an auxiliary lens upon the advancing of which the focal length of the condenser is changed so that large object fields can also be illuminated. Special diaphragms (annular diaphragms, central diaphragms, polarizers, etc.) for the different contrasting methods are arranged in centerable manner on a slide in the stage. An aperture iris diaphragm serves as additional contrasting means for bright-field operation.
An improved substage illumination system for microscopes of the type having a stationary condenser, a lens turret for changing objective lens, an aperture stop turret carrying aperture stops and a field stop turret carrying field stops arranged in the illumination ray path, said aperture and field stop turrets being coupled for motion with the lens turret by mechanical transmission means wherein the improvement comprises the aperture stop turret being disposed in the illumination path after the stop turret and disposed directly proximate to the rear focal plane of the condenser, and the aperture stop turret mounting an auxiliary lens for changing the focal length of the condenser in at least one position.
Dependencies are inferred from the claim text.