In view of the increased requirements regarding the power of the illumination arrangement, it is indeed possible to replace the conventional electrical components, such as transformers, by electronic switching components (transistors etc.) with lower heat losses.
#ERNST LEITZ WETZLAR MICROSCOPE FREE#
Not least because of the construction of its foot which is provided with stiffening ribs in the interior, such a microscope support exhibits a high mechanical stability, but is not free from disadvantages. In this microscope, a similarly variable aperture stop is a component of the converging lens and is operated by means of an adjusting wheel or lever disposed on this lens arrangement.
The aperture of the latter is adjustable by means of a knurled wheel secured in the support foot. Optical components are mounted in the central portion of the foot as part of an illumination arrangement, namely an illumination lens, a deflecting mirror and a variable light field stop. The lateral portions carry hand rests and permit an ergonomic posture of the arm during use of the microscope. the foot has a central portion and two lateral portions, and is covered by a base plate. In another known microscope support, optical and electrical components of the illumination arrangement are disposed in the foot.
No information on the arrangement of the optical system and the functions thereof can be inferred from this publication. Only the carrier is to be handled for the assembly and the maintenance of the electrical components. In the interior of the foot, an optical system is additionally arranged, which directs a beam of light through a projection lens to a converging lens. 2,451,884 discloses a microscope support, in the foot of which a dish-shaped carrier is securable to receive electrical components which serve for controlling the illumination. The support foot has a central portion, respective lateral portions integral therewith, carrying a hand rest, and a base plate covering the microscope support foot. The present invention relates to a microscope support foot for receiving optical and electronic components of an illumination arrangement as well as a drive unit for the optical components. A microscope support as claimed in claim 1, wherein said base plate comprises a material having good thermal conductivity and said heat conducting means conducts heat from said electrical components to said base plate. A microscope support as claimed in claim 1, wherein said illumination system includes an aperture stop and a light field stop, and wherein said adjustment mechanism includes first and second knurled knobs and first and second toothed belts associated therewith.ĥ. A microscope support as claimed in claim 1, wherein the base plate further comprises a plurality of feet and ventilation slits, and wherein the side portion including said first receiving chamber includes at least one ventilation slit in its upper wall.Ĥ. A microscope support as claimed in claim 1, wherein said heat conducting means includes a carrier on which the electrical components are secured, said carrier being within said first receiving chamber and in contact with the base plate.ģ. Means, associated with said first side receiving chamber, for conducting heat generated by said electronic components away from said components, said heat conducting means being in direct contact with said components andĪn adjustment mechanism for said optical illuminating system mounted on one of said side portions at a finger access distance from said focussing means.Ģ.
Partition means, within the base and cooperating with said base plate, for defining a central receiving chamber in the central portion and side receiving chambers in each of the side portions of the base, said partition means comprising separating walls and a thermally insulating seal disposed between the separating walls and the base plate Įlements of an optical illuminating system disposed within the central receiving chamber Įlectrical and electronic components of the illuminating system disposed in a first of the side receiving chambers Means, mounted on the upright, for focussing the microscope A base having a central portion and respective side portions integral with the central portion Ī base plate covering the bottom of said base Īn upright member for supporting a microscope, extending upwardly from the central portion of the base
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