C. Reichert Optische Werke Ag

Reichert Jung Optische Werks, A.g.

Fritz Bierleutgeb

Gerhard Kappl

A microscope with continuously or discontinuously variable objective magnification is provided with an autofocus system whose beam path passes through the objective and is directed out of the imaging beam path of the microscope between objective and eye piece to at least one photo-electric detector means. At least one optical system is located or locatable in the beam path of the autofocus system which allows or causes the at least one image formed on the detector means to be altered in scale when a change in the objective magnification occurs. The at least one optical system can be a zoom system or a series of lenses or fixed lens systems arranged to be inserted into the beam path of the focusing system. When the objective or objective magnification is changed, a coupling mechanism serves to appropriately vary the focal length of the at least one optical system located or locatable in the beam path of the autofocus system. Furthermore, a pattern comprising a light/dark contrast is projected into the object plane. This ensures in incident light operations that the system is optimally focused even with low contrast objects.

Autofocus system and method of using the same

In a microscope with a motor-driven objective turret, an intermediate position is provided between each two adjacent primary turret positions. This intermediate position enables manual operations to be carried out on the objectives in the objective turret, in a convenient manner, before viewing. Automatic means are provided for switching off the motor in both the primary and the intermediate turret positions.

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Vienna, Austria

Fritz Bierleutgeb