Ophthalmoscopic attachment for a surgical microscope

Details Ophthalmoscopic attachment for a surgical microscope Ophthalmoscopic attachment for a surgical microscope

1992-04-28

1994-06-14

Ben, Loha

Optics: eye examining, vision testing and correcting

Eye examining or testing instrument

Objective type

351205, 351220, 359376, 359381, 359385, A61B 313, G02B 2122

Patent

active

053214471

ABSTRACT:
An ophthalmoscopic attachment 1 for a surgical microscope 13 accommodates an optical system 14 which erects an inter-image of the fundus (or other particular area of the vitreous body of the eye) produced by at least one ophthalmoscopic lens 8 and interchanges the optical viewing paths. The optical system 14 is located directly behind the produced inter-image at a point where the stereoscopic optical viewing paths are still intertwined. The optical system 14 is configured either as a triplet with field lenses or as a straight-view inversion prism. The attachment also includes a lens 15 that is (a) positioned between the optical system 14 and the lens end of the attachment, and (b) movable along the optical axis of the attachment to put the critical section of the eye into focus.

REFERENCES:
patent: 2536718 (1951-01-01), Brandon
patent: 4710000 (1987-12-01), Spitznas et al.
patent: 4989023 (1991-01-01), Sakurai et al.
patent: 5009487 (1991-04-01), Reiner

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