Fundus observation apparatus

Details Fundus observation apparatus Fundus observation apparatus

2007-12-11

2007-12-11

Sugarman, Scott J. (Department: 2873)

Optics: eye examining, vision testing and correcting

Eye examining or testing instrument

Objective type

C351S205000, C351S207000, C351S208000, C351S246000

Reexamination Certificate

active

11018505

ABSTRACT:
An apparatus for observing a fundus of an eye of an examinee has an observation optical system having an image-pickup element which obtains a time-series fundus image, a display part which displays the obtained fundus image on its monitor as a moving image, a determination part which determines a standard fundus image based on the displayed image, a memory part which stores the determined image, a calculation part which digitizes the image based on a threshold luminance level to obtain a digitized image thereof, digitizes a present fundus image obtained after the determination of the standard image based on the threshold luminance level to obtain a digitized image thereof and compares the obtained digitized images two-dimensionally to obtain their positional difference, and a display control part for correcting a display position of the present fundus image based on the obtained positional difference to display the corrected image on the monitor.

REFERENCES:
patent: 5565938 (1996-10-01), Hanamura et al.
patent: 6099127 (2000-08-01), Manivannan et al.
patent: A 05-137696 (1993-06-01), None
patent: A 07-178056 (1995-07-01), None

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