Haag-streit Ag

Hansruedi Widmer

Franz Papritz

Gerd Ulbers

David Lobel

Eberhard Pertz

Hans Fankhauser

Reto Studer

Jurg Stucki

A changing device () for an optical examination device, for example a microscope, comprising two beam paths () for a first optical image, and a changing optics () which is rotatably arranged in the changing device and is, for example, a Galilei magnification changer having at least two, here three pairs of beam paths (andand, respectively) which can optionally be switched into the beam paths () of the changing device by rotating the changing optics. In accordance with the invention, the changing optics () comprises for each pair of beam paths at least one, here two additional beam paths (andand, respectively), assigned to the respective pair of beam paths, and the changing device () likewise comprises at least one, here likewise two additional beam paths (). The changing optics () is designed in such a way that it is simultaneously possible during rotation of the changing optics () for the beam paths (andand, respectively) of one pair to be inserted into the beam paths () or removed therefrom, and for the additional beam paths (andand, respectively) assigned to the respective pair to be inserted into the additional beam paths () of the changing optics or removed therefrom.

Optical component for a stereomicroscope

The present invention relates to a system for the stereoscopic examination of a patient's eye using a slit-lamp microscope ( ), wherein the patient's eye ( ) is illuminated by a light strip of a predetermined cross section which is emitted by a light source ( ). The light source ( ) is arranged on the vertical arm ( ) of a support ( ) and the eye ( ) to be examined is placed in an essentially horizontal plane on one side of said support. The stereo-microscope ( ) is essentially placed on a plane which is located on the side opposite to the first side of the support ( ). The vertical arm ( ) of the support ( ) is made in the shape of a column having a narrow cross section so as to minimize the optical obstruction between the stereo-microscope ( ) and the patient's eye. Using at least one beam ( ) from the stereo-microscope ( ), a partial ray is stopped down and the image information of said ray is directed to a reception unit ( ) located in said stereo-microscope ( ).

Device for the stereoscopic examination of a patient's eye

The video attachment is an apparatus to be mounted laterally on a microscope and which is independent of the optic of the microscope. The apparatus comprises an imaging lens system and a video camera. The light beam path in the apparatus is deflected in such a manner that the video camera does not impede the use of the microscope. The video attachment is preferably used with a microscope of a slit lamp for the diagnosis of the eye.

Video attachment to a microscope

Photographic attachment and shutter device for a binocular microscope

A spring is continuously acting on an upper part adjustable in the height by a spindle for compensating the weight of the vertical adjustable parts. An additional compensating spring acts over a piston on the upper part. By means of a screw which can be screwed in a threaded hole, the piston can be coupled with the base which is not displaceable in the height so that the effect of the additional spring is cut off. Many compensating springs can be provided which, at choice, can be rendered effective or ineffective in order to compensate for different weights.

Height adjustable supporting device for an instrument

Behind of the front objective, in the region of both parallel axes of the beams of rays of the microscope is disposed a slewable optical prismatic body with two plane parallel front faces and two opposite inclined, parallel refractive pairs of faces. In a basis position of this prismatic body, the path of the axes of the beams of rays remains uninfluenced by the plane parallel front faces of the optical prismatic body. In a position of the optical body pivoted by 90.degree., the beams of rays pass through the inclined refractive faces and they experience a transverse displacement. In accordance with the position of the prismatic body one may obtain therefore a greater or smaller stereoscopic angle .alpha.. This leads to significantly improved viewing possibilities, more particularly for eye examination.

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Niederscherli, Switzerland

Hansruedi Widmer