PROBLEM TO BE SOLVED: To provide an eye refractive power measuring apparatus capable of obtaining a precise measuring result.SOLUTION: The eye refractive power measuring apparatus includes: a measurement optical system including a projection optical system which has a measurement light source having a small light source size and high directivity to project a spot-like measurement luminous flux to the fundus of the eye from the center part of the pupil of the eye to be examined, and a light receiving optical system which takes out reflection light, emitted from the fundus of the eye, from the peripheral part of the pupil by a light shielding portion having a ring-like opening disposed on a conjugate position to make a two-dimensional imaging element receive the light from a ring image a luminous flux deflecting member disposed at a position deviated from the conjugate position with the pupil on the light path of the measurement optical system a rotation means which rotates the luminous flux deflecting member around the measurement light axis of the measurement optical system to eccentrically rotate the measurement luminous flux on the pupil of the eye to be examined and a calculation means which acquires eye refracting power of the eye to be examined on the basis of shape variation of the ring image light-received by the two-dimensional imaging element.COPYRIGHT: (C)2012,JPO&INPIT【課題】 精度の良い測定結果を得ることができる眼屈折力測定装置を提供する。【解決手段】 光源サイズが小さく、指向性の高い測定光源を有し、被検眼の瞳孔中心部から眼底にスポット状の測定光束を投光する投光光学系瞳孔と共役位置に配置されたリング状の開口を持つ遮光部により眼底からの反射光を瞳孔の周辺部から取り出して二次元撮像素子にリング像を受光させる受光光学系、を有する測定光学系と、前記測定光学系の光路における瞳孔と共役位置から外れた位置に配置された光束偏向部材と、被検眼の瞳上での測定光束を偏心回転させるために該光束偏向部材を前記測定光学系の測定光軸の回りに回転させる回転手段と、前記二次元撮像素子に受光されたリング像の形状変化に基づいて被検眼の眼屈折力を得る演算手段と、を備える。【選択図】 図1
