Fundus camera

Details Fundus camera Fundus camera

2009-03-31

2010-11-23

Dang, Hung X (Department: 2873)

Optics: eye examining, vision testing and correcting

Eye examining or testing instrument

Objective type

C351S212000, C351S221000

Reexamination Certificate

active

07837329

ABSTRACT:
A fundus camera favorably performing focusing on a fundus of an examinee's eye without a black dot plate in a target projection optical system comprises an illumination optical system comprising a light source and an objective lens, a photographing optical system comprising a focusing lens movable in the optical axis direction and a diopter correction lens to correct a diopter of severe ametropia, a first moving mechanism comprising a first driving unit moving the focusing lens, a focus detection optical system comprising a projection optical system comprising a light source and a photo-receiving optical system comprising a photodetector, a second moving mechanism comprising a second driving unit moving a part of the detection optical system including at least one of the projection light source and the photodetector in the optical axis direction, a monitor, and a control unit controlling the second unit in conjunction with movement of the focusing lens.

REFERENCES:
patent: 7219996 (2007-05-01), Ichikawa
patent: 2007/0030451 (2007-02-01), Ishihara et al.
patent: 1752084 (2007-02-01), None
patent: 2007151651 (2007-06-01), None
patent: 2007-202724 (2007-08-01), None

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