| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an eye refractive power measuring apparatus capable of obtaining a precise measuring result. <P>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. <P>COPYRIGHT: (C)2012,JPO&INPIT |
