Optical: systems and elements – Compound lens system – Microscope
Patent
1995-03-17
1996-11-05
Nguyen, Thong
Optical: systems and elements
Compound lens system
Microscope
359381, 359385, 359391, G02B 2100, G02B 2106
Patent
active
055723608
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The invention relates to a microscope stand foot for the accommodation of an illumination device having optical components and drive units for the same. U.S. Pat. No. 5,079,578 discloses a photographic camera system in which various object lenses can be flanged onto a camera housing via a bayonet closure. For the electrical transmission of information to an end of the object lenses and to the camera housing, the bayonet closure has resiliently supported contact pins. The contact pins are allocated corresponding contacts on the object lenses.
A microscope stand foot of this type is known (which is equivalent to U.S. Pat. No. 4,733,954) from EU-0211 138 A2. By means of partitions in the same, individual accommodation chambers for optical and electronic components are formed. Thus, in the accommodation chamber of the central part, an aperture diaphragm, a field diaphragm and a deflection mirror are arranged one behind another, while the accommodation chambers in the side parts are provided for the electronic components and for the drive units of the aperture diaphragm and field diaphragm. This known microscope stand foot, because of its dust-protected and heat-dissipating construction, largely makes possible long-term operation of the microscope, which is hardly disturbed by an otherwise frequently necessary cleaning of the optical components or by focus changes because of thermal expansions. The assembly of the optical components in the central part of this microscope stand foot is, however, relatively complicated and subsequent setting operations also prove to be difficult.
SUMMARY OF THE INVENTION
It is therefore the object of the invention to develop further a microscope stand foot of the type mentioned at the outset in such a way that, given simple assembly and disassembly of the optical components, adjustment of the same in the stand foot is dispensed with.
According to the invention, this object is achieved by providing a microscope stand foot including at least two mating surfaces. The microscope stand foot further comprises a cylindrical tube having an envelope surface. Moreover, assembled within the cylindrical tube is an illumination device. The illumination device includes at least one optical component, an aperture diaphragm, and a field diaphragm. A drive unit for operating each of the diaphragms is operatively connected to each of the diaphragms. A carrier is secured to the microscope stand foot by a fastening device such that the cylindrical tube is braced by the carrier and the envelope surface of the cylindrical tube is pressed onto the at least two mating surfaces.
The objective of the invention is also achieved by supplying the carrier with at least two semicircular curves which engage over and under a periphery of the cylindrical tube to hold the cylindrical tube on the carrier in a rotationally fixed manner.
A further objective of the invention is to have a microscope stand foot which is user friendly. This objective is achieved by providing the microscope stand foot with a focusing device and drive units arranged in a side wall, and wherein the drive units are located one above the other and are located within finger range of the focusing device.
An additional objective of the invention is to have the drive units housed within the microscope stand foot. This objective is achieved by providing the drive units as an axle supported by the carrier and a separate control cable for each diaphragm.
BRIEF DESCRIPTION OF THE DRAWINGS
Further details and features can be seen from the following description of an exemplary embodiment shown schematically in the drawing, in which
FIG. 1 shows a perspective view of the micro-scope stand foot according to the invention,
FIG. 2 shows a sectioned front view perpendicular to the optical axis,
FIG. 3 shows a bottom view and
FIG. 4 shows a side view of the microscope stand foot according to the invention in section along the optical axis.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
The microscope stand foot 10 show
REFERENCES:
patent: 4208089 (1980-06-01), Netto
patent: 4283111 (1981-08-01), Wieber et al.
patent: 4733954 (1988-03-01), Reinheimer et al.
patent: 4998810 (1991-03-01), Sander et al.
patent: 5071241 (1991-12-01), Brock
patent: 5079578 (1992-01-01), Kohno et al.
patent: 5235457 (1993-08-01), Lichtman et al.
Leica Mikroskopie und Systeme GmbH
Nguyen Thong
Sikd-er Mohammad Y.
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