Fundus camera

Details Fundus camera Fundus camera

2007-05-22

2007-05-22

Dang, Hung Xuan (Department: 2873)

Optics: eye examining, vision testing and correcting

Eye examining or testing instrument

Objective type

C351S208000

Reexamination Certificate

active

10946076

ABSTRACT:
A fundus camera capable of performing accurate and easy focusing in photographing a peripheral portion of a fundus has a photographing optical system including a photographing optical axis, a focusing lens movable in a direction of the photographing optical axis and an image-pickup element, a lens moving unit, a focus target projection optical system, a focus target detection optical system, a fixation target presenting unit, in which a presenting position of the fixation target is changeable between a reference position for photographing a central portion of the fundus and a position for photographing a peripheral portion, a device which controls the lens moving unit to perform automatic focusing, and a device which controls the fixation target presenting unit to bring the presenting position of the fixation target to the reference position when the automatic focusing is actuated, even though the presenting position is set to the peripheral position.

REFERENCES:
patent: 5463430 (1995-10-01), Isogai et al.
patent: 6574432 (2003-06-01), Nanjyo
patent: 6669339 (2003-12-01), Nanjyo
patent: 7052134 (2006-05-01), Nanjo et al.
patent: 2002/0025145 (2002-02-01), Nanjyo
patent: A 07-088082 (1995-04-01), None
patent: A 2000-5131 (2000-01-01), None

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