Optics: eye examining – vision testing and correcting – Eye examining or testing instrument – Objective type
Patent
1984-10-24
1987-06-02
Bovernick, Rodney B.
Optics: eye examining, vision testing and correcting
Eye examining or testing instrument
Objective type
350516, 351205, G02B 2122, A61B 310
Patent
active
046698370
ABSTRACT:
An ophthalmic microscope combined with a laser photocoagulator and a binocular comprising a first telescopic tubular section connected to the binocular and a second tubular section slideably connected to the first section. The second section comprises an objective lens and a first reticle fixed to the second telescope section spaced within the telescope. A second reticle means is provided on the first telescopic section between the objective lens and the first reticle. A field lens is provided within the first telescopic section and is arranged such that the focal point of the field lens coincides with the second reticle. Laser means includes means on the first telescopic section for passing the laser beam into the telescope along an axis contained within the plane which includes the second reticle. The binocular comprises a field lens, a pair of object lenses on either side of the optical axis between the field lens and the binocular and is adapted to erect the image and is adapted to separate rays to the left eye and to the right eye. A first rhomboid prism is adapted to divert the rays from one side to the other and a second rhomboid prism is adapted to divert the rays to the other side to avoid pseudostereopsis.
REFERENCES:
patent: 4015898 (1977-04-01), Schirmer
patent: 4307944 (1981-12-01), Schirmer
Munnerlyn Charles
Schirmer Kurt E.
Bovernick Rodney B.
Schirmer Kurt E.
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