Abstract: Disclosed is an apparatus for precisely measuring optical characteristics of an eye to be examined, particularly an ophthalmologic characteristic measuring apparatus capable of observing a front portion of the eye as well as measuring optical characteristic of an irregular astigmatism component. The apparatus includes a first illuminating optical system, a first receiving optical system, a first converting member, a first light receiving unit, a second illuminating optical system, a second light receiving optical system, a second light receiving unit, and an arithmetic unit. The first illuminating optical system illuminates convergently a portion near the center of curvature of the cornea of an eye to be examined with first illuminating light rays emitted from a first illuminating light source. The first receiving optical system receives the first illuminating light rays reflected back from the cornea of the eye. The first converting member converts the reflected light rays into at least seventeen beams.

Abstract: Disclosed is an optical characteristic measuring apparatus for precisely measuring optical characteristics of an eye to be examined by projecting a specific pattern on the retina of the eye. In particular, the measuring apparatus is capable of measuring an irregular astigmatism component. In this apparatus, an illuminating optical system illuminates the retina of an eye to be examined via an illuminating state changing unit capable of changing an illuminating state created by light rays emitted from the light source; a light receiving optical system receives light rays reflected back from the retina of the eye and guides the reflected light rays to a light receiving unit; and an optical characteristic arithmetic unit determines optical characteristics of the eye on the basis of a signal outputted from the light receiving unit.

Abstract: In the present invention, an illuminating optical system illuminates an infinitesimal domain on an object to be examined using light rays emitted from an illuminating light source, a light receiving optical system receives light rays reflected back from the object to be examined and guides the reflected light rays to a light receiving unit, a converting member separates the reflected light rays into at least five regions and, in the regions, converges the light rays through a converging operation and transmits the light rays through a transmitting operation, the light receiving unit receives a plurality of light rays converted at the converting member, a display unit forms an image of the object to be examined on the basis of the light rays which have undergone the transmitting operation from the converting member and have been obtained at the light receiving unit, and an optical characteristic arithmetic unit determines optical characteristics of the object to be examined on the basis of an inclination angle

Abstract: The present invention relates to ophthalmological apparatuses more specifically intends to provide an ophthalmological apparatus for forming a sectional image signal of a measurement object part within the subject's eye.

Abstract: The present invention relates to an ophthalmometric apparatus and is intended to provide an ophthalmometric apparatus that generates image signals representing a section of a measuring portion of a measuring eye.

Abstract: An image input apparatus includes an image sensor having a two-diminsional photosensitive surface for converting each of two-dimensional image segments into which an image is divided, in a predetermined sequence, to provide digital information regarding each of the image segments.