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US 8,132,915 B2Granted
Binocular indirect ophthalmoscope
AssigneeKeeler Corporation
InventorsKelvyn Church, Stephen Church, James Robert Arnold Matthews, Eugene R. Vanarsdale
Life of this patent
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AssigneeKeeler Corporation
InventorsKelvyn Church, Stephen Church, James Robert Arnold Matthews, Eugene R. Vanarsdale
Estimating the term…
A binocular indirect opthalmoscope has a light source for producing an illumination beam and an illumination mirror (7) for directing the illumination beam to an eye to be viewed. The opthalmoscope also has, viewing optics including left-hand and right-hand eyepieces (12,13) and an optical splitter (9,10) for directing light along left-hand and right-hand viewing paths to the two eyepieces. An aperture holder (20) is pivotally mounted in a frame (3,5,6) of the opthalmoscope and adjusts the size of the illumination beam, under the control of a manually rotatable control knob (24). The movement of the aperture holder is transmitted, by means of mechanical linkage, to a moveable carriage (15) on which is mounted both the optical splitter and the illumination mirror, so that when the user moves the control knob to adjust the size of the illumination beam the optical splitter and the illumination mirror are also adjusted in position with respect to the opthalmoscope frame.
A binocular indirect ophthalmoscope comprising illumination optics including an adjustment device for selectively altering the size of an illumination beam and a beam directing device for directing the illumination beam of selected size to an eye to be viewed, the ophthalmoscope further comprising viewing optics including left hand and right hand viewing eyepieces, an optical splitter for directing light travelling along left and right viewing paths respectively to the two eyepieces, wherein the beam directing device and optical splitter are moveable with respect to a frame of the ophthalmoscope respectively to alter the position of the illumination beam and the lateral separation of the viewing paths, characterised in that the adjustment device for selectively altering the size of the illumination beam, the optical splitter and the beam directing device are linked such that adjustment of the size of the illumination beam results in a corresponding adjustment in the beam directing device and the position of the optical splitter.
A binocular indirect ophthalmoscope comprising a frame;
A binocular indirect ophthalmoscope comprising illumination optics including an adjustment device for selectively altering the size of an illumination beam and a beam directing device for directing the illumination beam of selected size to an eye to be viewed, the ophthalmoscope further comprising viewing optics including left hand and right hand viewing eyepieces, an optical splitter for directing light travelling along left and right viewing paths respectively to the two eyepieces, wherein the beam directing device and optical splitter are moveable with respect to a frame of the ophthalmoscope respectively to alter the position of the illumination beam and the lateral separation of the viewing paths, in which the adjustment device, the optical splitter and the beam directing device are linked such that adjustment of the size of the illumination beam results in a corresponding adjustment in the beam directing device and the position of the optical splitter, the link between the adjustment device, the optical splitter and the beam directing device being provided by a mechanical linkage including a spindle rotatably mounted in the frame, the spindle extending between an upper region of the ophthalmoscope, where the adjustment device is located, and a lower region of the ophthalmoscope where the carriage is located.
Dependencies are inferred from the claim text.