DD213525A1 - APPARATUS FOR OBJECT FOCUSING - Google Patents

Abstract

The device according to the invention for object focusing for microscopes is used for upright and inverted light microscopes. The object of the invention is to make it possible to actuate the focusing movement of an object located on the object table from an arbitrary location in the vicinity of the microscope separate from the microscope. For this it is necessary to transfer the necessary positioning movement without losses to the stage and to convert it into a focusing movement. According to the invention this is done by a hydraulic system, wherein the adjusting movement acts on at least one piston which is connected to a cavity in the object table.

Description

Title of the invention: y.,. \ · · ^ ^; . ^ '>":' ^ - ^ '' . '' · '';"/:;>>; Device for object focusing

Field of application of the invention:

The device finds application in upright and inverted light microscopes in which the microscopic object is recorded on a stage and opposite the objective along the optical axis of the microscope *. is fo-kissed. :; ^-:; .-. _: ·. , · ''. ' , , ; '. ';'\_; . ' , , '· · ·. -; ';:.

History of the known technical solutions:.

In the known light microscopes, there are different ways of focusing on the object. The most commonly used method, with the lens fixed, is to move the lens object with the object along the op "? To move the optical axis of the microscope and to focus with it. This is realized by a pin adjustment device which is arranged in the stand column. Der- v. Such adjusting devices are mechanically complex and affect the stability of the. Statives. Another disadvantage is the fixed arrangement of the control knob on the tripod. A Pernbedienuhg the adjustment can only be done on additional components and motor drive means. :

Protecting the preparation against impacting the object against the objective is difficult to realize.

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Z iel the invention ^;

The aim of the invention is to eliminate the disadvantages mentioned, in particular, the focusing movement should be possible iron a separate from the microscope anywhere in the vicinity of the microscope. A preparation protection should be realized for each lens adjustment and accidents between slide and lens should be indicated by signals, '

Explaining the nature of the invention? ,

The object of the invention is to provide a device for object focusing for microscopes with a microscope stage attached to a microscope, which makes it possible to initiate a necessary adjustment movement separately from the microscope without transferring losses to the microscope and converting it into a pokering movement. ,

According to the invention, this is realized in that a first part of the object table carrying an object is movably guided parallel to an optical axis of the microscope opposite a second part of the object table mounted on the microscope. Between both parts of the object table there is a cavity filled with an incompressible medium, which is connected to a pressure vessel located outside the microscope, the volume of which can be changed by means of at least one piston. Advantageously, the piston of the pressure vessel consists of two cylindrical cylinders arranged one inside the other It is also advantageous if the pressure vessel is connected to a device which, when the pressure of the medium rises above a predetermined value, interrupts the connection between the cavity and the pressure vessel and triggers a signal

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Embodiment:

The invention will be explained in more detail below with reference to the schematic drawing.

In the figure, a device according to the invention is shown in connection with a microscope, whereby the adjusting device is enlarged in relation to the microscope.

^; V. ' net is · · '; · "."''.'''-..''"';; : . ; , '·, ..- .-''/'"A microscope stage consisting of an upper part 1 and a Divided is placed on a connected with a microscope 4 T ischträger 3» on a support surface 5 is a microscope slide 6 is attached to the microscope. a lens turret 8 with a lens 7 and a Einblicktubus 10 are further attached · Between the upper part 1 and the lower part 2 of the microscope stage is a cavity 12. This is filled with an incompressible ^ ^v ··· medium and through a transmission cable 13 with a Cylinder 14 and a pressure vessel 15 which are located in a housing 16

 In the cylinder 14, a first piston 17 and a second piston 18 are arranged. With the help of known not shown gear means and Bedienknb'pfe either the piston 17 in the piston 18 pder both pistons are displaced together. The Überdrujckbehälter 15 includes a piston 20, a Peder 21 and an electrical contact 22; The electrical contact 22 is connected by an electrical conductor 23 to a contact 24, a battery 25. I in contact 27 of the battery 25 is connected by an electrical conductor 26a via a closure system, which consists of a Tauchspulsystem 31, a closure spring 33 and a valve 32, by means of a contact in the cylinder 15 with the piston 20 · Furthermore, the contact 27th through a line 26b via a lamp 29 and through a line 26c via an acoustic signal system 30 to the piston 20.

! ' ^: · · ''. , bound. '' ,, ^-:; _'·: .. "· · ·.''·' · ';';^;''^':.'':,': · Operating the not shown Bedienknb'pfe causes a displacement of one or both pistons 17, 18 so that

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the cylinder interior is increased or decreased. Accordingly, the cavity 12 increases or decreases and there is a movement of the upper part 1 along the optical axis of the microscope. The movement away from the lens 7 is by gravity and can. be supported by spring force. If the slide 6 hits the objective 7, the piston 20 is moved within the overpressure container 15 against the spring 21, and via the contact 22, the piston 20, the electrical connector 23 and the electrical conductors 26, the circuit is formed closed to the battery 25. As a result, the various components ¹ connected in parallel in the circuit come into action. The shutter system 31. 32, 33 blocks the connection between the cylinder 14 and the cavity 12. The lamp 29 lights up and the acoustic signal system 30 issues a warning signal. If the piston 17 or the piston 18 is displaced further without changing the direction ₉ , the objective 7 and the slide 6 are protected against further loading

If a change takes place in the direction of the reverse direction of the pistons 17, 18, then the spring 21 presses the piston 20 into the starting position. The circuit is broken up, the core of the immersion coil system 31 is brought by the spring into _: its starting position and at the same time the valve 32 is opened. In addition, the lamp 29 and the acoustic signal system 30 are turned off.

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Claims (3)

PJrfindungsanepruch :; /. / '.// / ..:': ' 1. Device for object focusing for microscopes: with: 'eittem .am microscope attached to the object table, marked; ^': - characterized in that an object bearing the first part is mounted dös object table with respect to einem./am;Mikroskop fixed second part of the object table movable parallel to an optical axis of the microscope and that between the two parts of the object table at least one incompressible with a medium precipitated cavity is present, which is connected to a - located outside the microscope pressure vessel, the volume of which can be changed by means of at least one piston i 2, device according to point T, characterized in that the piston / de's second pressure vessel consists of two nested parts arranged inside one another. exists, which are., '/ jointly and individually movable. 3. The device according to item 2, characterized in that V 'dor pressure vessel is connected to a device, we speak at Anst intrinsic to the pressure of the Med ium e inen }: predetermined value, the connection between the cavity / and the pressure vessel interrupts and a signal triggers. - For this T page drawings - 4182