Patent ID: 6695450
Filing Date: 2004-02-24
Classification: A61B

Abstract:
An ophthalmic characteristic measuring apparatus, comprising:a first light source section for emitting light flux with a first wavelength; a first illumination optical system for illuminating a minute area on a retina of a subject eye with the light flux from the first light source section; a first light receiving optical system for guiding a section of first reflected light flux reflected and returned from the retina of the subject eye to receive it through a first conversion member for converting the first reflected light flux into substantially at least 17 beams; a first light receiving section for receiving the received light flux of the first light receiving optical system to form a first signal; a second light source section for emitting light flux with a second wavelength; a second illumination optical system for illuminating an eyeground of the subject eye with the light flux from the second light source section and with a predetermined pattern; a second light receiving optical system for guiding second reflected light flux reflected and returned from the eyeground of the subject eye to receive it; a second light receiving section for receiving the received light flux of the second light receiving optical system to form a second signal; an arithmetic section for obtaining a wavefront of the light flux reflected from the subject eye on the basis of the first signal from the first light receiving section, and obtaining refractive power of the subject eye on the basis of the second signal from the second light receiving section; and an exposure amount determination section for determining an exposure amount of the first light receiving section on the basis of the second signal of the second light receiving section.