Apparatus for measuring the refractive power of an optical syste

Optics: eye examining – vision testing and correcting – Eye examining or testing instrument – Objective type

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351205, A61B 310

Patent

active

057370591

ABSTRACT:
An apparatus for measuring the refractive power of an optical system has a scan optical system for scanning a fundus with slit light beams, a measuring optical system for taking the slit light beams reflected from the fundus of the examined eye, a plurality of light receivers for detecting the slit light beams taken in by the measuring optical system, and a calculator for obtaining Fourier spectrums by Fourier-transforming detection signals of the plurality of light receivers and thus calculating the eye refractive power of the examined eye on the basis of predetermined frequency components of Fourier spectrums of the detection signals.

REFERENCES:
patent: 4676612 (1987-06-01), Wada et al.
patent: 5428414 (1995-06-01), Iwane

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