1979-12-11
1981-09-22
Henry, Jon W.
G02B 724, G02B 2316
Patent
active
042906660
ABSTRACT:
The invention concerns a joint for an observation device as an accessory to or a component of ophthalmological devices or surgical microscopes. The invention permits the folding of the object side optical axis of said device in such a manner that at any desired rotation about pivots respective inclinations of the observation beam relative to the object are obtained without the object migrating out of the field of view and without reversing the object image. Furthermore, the invention enables a continuous angular adjustment and a non-varying position of the entrance pupils of the device. This is achieved by directing a non-displaceable axis of rotation at right angles to the observation plane. The displaceable axis of rotation and the observation beam include angles relative to each other and have a common vertex in the observation plane.
REFERENCES:
patent: 2967458 (1961-01-01), Stone
patent: 3762796 (1973-10-01), Heller
patent: 3887267 (1975-06-01), Heller
patent: 3891301 (1975-06-01), Heller
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