Optics: eye examining – vision testing and correcting – Eye examining or testing instrument – Objective type
Reexamination Certificate
2008-06-04
2010-02-09
Hasan, Mohammed (Department: 2873)
Optics: eye examining, vision testing and correcting
Eye examining or testing instrument
Objective type
C351S205000, C351S208000, C351S211000
Reexamination Certificate
active
07658494
ABSTRACT:
A fundus camera having a function of measuring a retinal function, capable of picking up (obtaining) a sharp color image of a fundus suitable for a fundus examination and measuring a retinal function with high accuracy comprises an illumination optical system comprising a visible light source, an image-pickup optical system comprising an image-pickup element, a mode selection switch for performing switching between a fundus photographing mode and a retinal function measurement mode based on variance of an intrinsic signal of a retina made by retinal stimulation, and a control unit which controls the optical systems, wherein the unit lowers, when the retinal function measurement mode is selected, illumination intensity of the illumination optical system per unit time in illuminating the fundus than that in picking up the color fundus image, and controls the element to pick up first and second visible fundus images at different points in time.
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Hanebuchi Masaaki
Nanjo Tsuguo
Shibata Naohisa
Hasan Mohammed
Nidek Co., Ltd
Oliff & Berridg,e PLC
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