Device for stabilizing the focus of a microscope

Details Device for stabilizing the focus of a microscope Device for stabilizing the focus of a microscope

1996-08-16

1997-12-30

Dzierzynski, Paul M.

Optical: systems and elements

Compound lens system

Microscope

359382, G02B 2126, G02B 2100

Patent

active

057037159

ABSTRACT:
A device for stabilizing the focus in a microscope (1) is described which has an objective (2) and a specimen stage (3), constructed in a movable fashion, for the purpose of setting the focus. The specimen stage (3) is constructed such that it can be moved via a toothed rack (4) and a drive gear (5) along the optical axis (22) of the objective (2). When the microscope (1) is heated by integrated electronic components (6) and/or an illuminating device (7), the body (13) of the microscope expands, and the microscope (1) is thereby defocused. Two rods (8 and 9) connected to one another, which have a different thermal expansion, are arranged between the toothed rack (4) and the specimen stage (3) for the purpose of compensating for the defocusing.

REFERENCES:
patent: 4703181 (1987-10-01), Swann et al.
patent: 4733954 (1988-03-01), Reinheimer et al.
patent: 5438451 (1995-08-01), Schweizer

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