Carl-zeiss-stiftung

Other

Carl-zeiss-stiftung, Heidenheim/brenz

Erich Blaha

Franz Muchel

Walter H Lang

Gerhard Gaida

Gerhard Hanemann

Fritz Strahle

Ortwin Muller

Kurt Schulz

Ulrich Lemcke

Hartmut Gartner

Martin Poxleitner

Albrecht Vogel

Ortwin Mueller

Roland Schmauder

Roland Trentin

For defined positioning of a laser beam in an ophthalmological instrument with a slit projection device and an optical observation unit, a focusing objective is displaced by a displacement device in a plane parallel to the observation beam path of the optical observation unit. The laser beam path and the slit projection beam path are separately deflected coaxially with the observation beam path in the direction of the target plane. Defined positioning of a laser beam in the patient's eye is achieved by means of the displacement device, which includes a displacement element connected to the focusing objective, and an operating element. The displacement device furthermore offers diverse means of adjustment.

Beam positioning device for an ophthalmological instrument

Confocal laser-scanning ophthalmoscope

The invention is directed to a confocal scanning ophthalmoscope defining an illuminating beam path and a viewing beam path with these paths having respective portions extending along a common path segment. The ophthalmoscope has a light-deflecting device mounted in a first apparatus part and in the common path segment for scanning the ocular fundus point-by-point. A first flexible light-wave conductor conducts light transmitted by a real light source to a point light source. The ophthalmoscope has a pinhole diaphragm which is mounted in the viewing beam path and in a plane conjugated to the point light source. A detector of the ophthalmoscope measures the light transmitted through the pinhole diaphragm and a second flexible light-wave conductor conducts this light to the detector. The detector is mounted in a second apparatus part separate from the first apparatus part so as to permit movement of the parts relative to each other.

Confocal scanning ophthalmoscope

In an instrument for the examination and surgery of the eye, an ophthalmological objective is combined with an operation microscope whose main objective is combined with an optical system of variable back focus and focal length. Every plane of the eye lying between the cornea and the fundus is imaged by the instrument at an intermediate image plane. In this way, with a single instrument, the operator can carry out work on the cornea, the eye lens, the vitreous body, and the retina. Since the instrument provides the observer with a reflection-free image, contact of the eye to be operated upon with an optical auxiliary means which eliminates the refractive power is unnecessary.

Apparatus for examination and surgery of the anterior and posterior

An illuminating unit for a standard slit lamp is described, which can be mounted as a structural unit on the prism head of the standard slit lamp. The illuminating unit enables photographic documentation of the optical sections observed.

Standard slit lamp adapted for photographic documentation

A known slit-lamp apparatus includes a slit projector defining an optical axis and a corneal microscope. A supplement arrangement makes it possible to conduct a laser treatment with the known slit-lamp apparatus. A therapeutic laser beam is reflected coaxially into the projection beam path of the slit projector. An optical displacement arrangement is mounted on the optical axis downstream of where the therapeutic laser beam is reflected in and serves to displace the laser beam and the projection beam horizontally with respect to the optical axis.

Supplement arrangement for a slit-lamp apparatus for treating the eye by

A headband to be worn on the head of a person making an examination, with an examination instrument such as an observation unit and an illuminating unit supported from the headband so as to be adjacent the eyes of the examining person. A counterweight on the rear of the headband counterbalances some of the weight of the examination instrument at the front, and makes the headband sit more evenly and comfortably on the wearer's head. The counterweight may contain a power pack, such as rechargeable batteries, providing power for the illuminating unit through a cord extending along one side of the headband.

Medical examination instrument with headband support

A binocular ophthalmoscope having two horizontally displaceable deflecting mirrors in the ray paths from the two eyes of the observer to the pupil of the eye being examined, and a vertically displaceable and also tiltable mirror in the beam path from a source of illumination to the pupil of the eye being examined. Movement of the horizontally displaceable mirrors toward or away from each other varies the stereoscopic base of observation. Vertical displacement and tilting of the other mirror serves to vary the location where the illuminating beam enters the pupil relative to the location where the rays from the eyes of the observer enter the pupil of the eye being examined. The mechanism for vertically moving and tilting the third mirror is coupled to the mechanism for moving the two horizontally displaceable mirrors, enabling the adjustments to be performed from a single manually operable adjusting knob, more easily and conveniently than in prior arrangements where successive operation of two adjusting members may be required.

Binocular ophthalmoscope

A compact apparatus for the subjective and objective determination of refraction of the eyes of a person. Two projection ray paths (6, 7), separated in space from each other, are provided, both ray paths containing systems (10, 11) for the continuous adjustment of spherical and astigmatic effects. Together with an optical telesystem (15) and the lenses of the eye they focus a test mark (3) on the retina of each of the eyes (18, 20) of the test subject. The light reflected by the retina passes via mirrors (14) into observation ray paths (21). They focus the retina and thus the test mark (3) in an image plane (30). The adjustment systems are displaced until the images of the test mark appear sharp in the image plane (30). After such an objective determination it is possible by actuating the same adjustment elements (10, 11) to adjust subjectively until the test subject sees the test mark with optimum sharpness. The projection ray paths are deflected via partially transmitting mirrors (17, 19) into the eyes of the test subject. The apparatus thus represents a free-view instrument. By inclining mirrors or the entire apparatus a near-distance vision examination is also possible.

Apparatus for the subjective and objective determination of refraction

The invention contemplates structure for such combinable use of a portable ophthalmoscopy light and a portable stereomicroscope that components are readily convertible to selectively provide ophthalmoscope functions for examination of posterior regions of an eye, and slit-lamp functions for examination of anterior regions of the eye. Knob adjustment of the housing of the ophthalmoscopy light provides selective availability of circular and slit diaphragms, as well as filters, as appropriate to the particular kind of observation to be made.

Portable ophthalmological instrument for selective examination of

In articulated optical systems, rotation of the image takes place due to the articulations. The invention eliminates this disadvantage by producing a signal whose polarity is dependent on the direction of rotation in which the image produced in the observation plane (64) is turned with respect to the object. By the signal, a compensation element (72) arranged in the articulated optical system is turned until the signal has disappeared. Two devices are disclosed for producing the signal: 1. At the start of the articulated optical system a mark (16) is introduced by reflection, it being focused at the end of the articulated optical system on a sensor (67). 2. On all articulations there are arranged position transmitters (111,112, etc.) which are connected with a minicomputer (130) which calculates the resultant image rotation and gives off a corresponding signal via a digital analog converter (131).

Method and apparatus for automatically compensating for rotation of

The invention contemplates a viewing-head attachment removably securable to the body of a microscope and adapted to accommodate binocular viewing elements. The attachment employs two housings which are pivotally connected so that the binocular-viewing elements on one housing are enabled to stereoscopically view an object examinable under the microscope body to which the attachment is secured. The quality of stereoscopic viewing is unaffected regardless of the instantaneous pivot-angle relationship as between the two housings, and no further optical adjustments are needed.

Adjustable viewing head for a stereoscopic microscope

A photocoagulator using a gas discharge lamp and a mirror for forming a double image of the luminous plasma region of the lamp in a photocoagulation area adjusted for size by interchangeable field stops is improved for easier adjustability when field stop sizes are changed. A manually operable screw ring moves the lamp axially relative to the mirror to adjust the separation of one image from the other relative to the size of the field stop, and the side of the field stop facing toward the coagulation area is illuminated for brightening the environment of the coagulation area for easier observation.

Growing community of inventors

Essingen, Germany

Erich Blaha