Camera-equipped ophthalmoscope

Details Camera-equipped ophthalmoscope Camera-equipped ophthalmoscope

1984-10-22

1986-06-03

Bovernick, Rodney B.

Optics: eye examining, vision testing and correcting

Eye examining or testing instrument

Objective type

350255, 351205, A61B 314

Patent

active

045926310

ABSTRACT:
In a camera-equipped ophthalmoscope, an aspherical objective lens is connected to one end of a cord wound about a cord-roll-up drum biased by a helical spring to rotate in a direction to take up the cord. The rotation of the cord-roll-up drum causes a lens-barrel contained therein to move in the direction of its optical axis, whereby the focus of the photographing lens is corrected depending upon the amount of the movement of the aspherical objective lens.

REFERENCES:
patent: 4018514 (1977-04-01), Plummer

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