Optical device having a focusing function

Details Optical device having a focusing function Optical device having a focusing function

1986-06-16

1987-05-19

Bovernick, Rodney B.

Optics: eye examining, vision testing and correcting

Eye examining or testing instrument

Objective type

351205, 354 62, A61B 314, G03B 2900

Patent

active

046662685

ABSTRACT:
An optical device comprising, in succession from the object side, light beam control system, a stationary optical element having a reduction-imaging function, and a focusing optical element, the optical device being particularly suitable for use with an eye-fundus camera or the like.

REFERENCES:
patent: 3784286 (1974-01-01), Dudrangne
patent: 4235540 (1980-11-01), Hanamura et al.
patent: 4248506 (1981-02-01), Takahashi

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