Optics: eye examining – vision testing and correcting – Eye examining or testing instrument – Objective type
Patent
1980-10-16
1984-06-26
Rosenberger, R. A.
Optics: eye examining, vision testing and correcting
Eye examining or testing instrument
Objective type
350520, 350587, 351205, 351214, A61B 310
Patent
active
044563485
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to a combination instrument for the examination of the eye, consisting of a binocular telescopic magnifier and of an ophthalmological or ophthalmometric examination instrument. In ophthalmological instruments the development is tending towards combination instruments by which efficient operation in minimum space is possible.
From West German Pat. No. 26 14 273 it is known to combine an ophthalmometer with a binocular telescopic magnifier in such a manner that the optical system of the ophthalmometer can be adjusted rather than the main objective of the binocular telescopic magnifier. Such a combination instrument has the disadvantage that when switching from slit lamp to ophthalmometer and vice versa the main objective must be detached from a connecting part and replaced by the ophthalmometer attachment. The placing on and off of the parts of the instrument will be tolerated only by a group of users who do not have to effect the change too frequently.
The object of the present invention is therefore to provide a combination instrument which permits rapid change from one diagnostic instrument to the other, for instance from a slit lamp to an ophthalmometer.
This object is achieved in accordance with the invention in the manner that the main objective of the binocular telescopic magnifier is arranged in a mount which is supported for swinging around a horizontal axis out of the position in which it is present in the optical ray path and that the mount is provided with a connecting piece to receive an ophthalmological instrument.
If the main objective is located in operating position in the optical ray path then the binocular telescopic magnifier acts together with a slit lamp and forms a slit-lamp instrument.
In one suitable embodiment of the invention, the slit lamp is swingable around a vertical axis and can be swung into and out of the ray path of the binocular telescopic magnifier. The connecting piece which is attached to the mount of the main objective is advisedly developed as a receiving dovetail. An insertion piece which fits this dovetail receiver can be fastened to a part of the ophthalmometer which can be connected to the combination instrument.
If such an opthalmometer part is so connected with the objective mount of the binocular telescopic magnifier that when the objective is swung up into its position of rest said part is itself swung into its operating position into the ray path, then the instrument can be used as a full-fledged ophthalmometer. A mating piece which fits into the dovetail receiver of the main objective mount can, however, also be fastened to some other ophthalmological instrument, for instance an endothelium microscope or a Placido light source so that--together with the binocular telescopic magnifier--other ophthalmological examining instruments can be obtained.
In one advantageous embodiment, the mount of the main objective is of rectangular contour, its upper side bearing a two-part protective lid, each part being capable of swinging about a horizontal axis and the front part covering the main objective in a position of rest of the main objective swung out of the optical ray path.
The binocular telescopic magnifier is advisedly fastened to a support which is provided with a hole to receive a correspondingly shaped attachment piece of the downwardly swingable ophthalmological instrument or partial instrument. In this way this instrument is fixed in its position of rest.
Furthermore, it is advantageous to provide tubes in the support to receive current-supply cables. These cables can be connected with the ophthalmometer light and a microswitch for the slit lamp.
The advantages obtained with the invention reside in particular in the fact that the part of the instrument which is swung out of the ray path into its position of rest does not interfere with the ophthalmologist in the space in front of the eye of the patient and that the change from one examination instrument to the other requires practically merely one simple manipulation. One embodim
REFERENCES:
patent: 1283963 (1918-11-01), Takahashi
patent: 1547142 (1925-07-01), Bausch
patent: 2235319 (1941-03-01), Jobe
patent: 3652153 (1972-03-01), Gambs
patent: 3831285 (1974-08-01), Vissing
patent: 4315672 (1982-02-01), Muller et al.
Maglica Peter
Schulz Kurt
Carl Zeiss-Stiftung
Rosenberger R. A.
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