| 摘要 |
An ophthalmologic apparatus comprises a light source 12, an optical measurement system 13 that radiates first light from the light source to inside an eye to be examined and guides first reflected light from the eye, an optical reference system (24, 22) that radiates second light from the light source to a reference surface and guides second reflected light from the reference surface, a photo detector 26 that detects interfering light between the first reflected light from the optical measurement system and the second reflected light from the optical reference system, and a processor that determines a position of a measuring portion of the inside of the eye based on the detected interfering light. The optical measurement system comprises an incident angle changing member 46 that changes an incident angle of the first light radiated to the eye within a predetermined angular range relative to an axis of vision of the eye. |
| 主权项 |
1. An ophthalmologic apparatus comprising:
a light source; an optical measurement system that radiates first light from the light source to inside an eye to be examined and guides first reflected light from the eye; an optical reference system that radiates second light from the light source to a reference surface and guides second reflected light from the reference surface; a photo detector that detects interfering light between the first reflected light from the optical measurement system and the second reflected light from the optical reference system; and a processor that determines a position of a measuring portion inside the eye based on the detected interfering light, wherein the optical measurement system comprises an incident angle changing member that changes an incident angle of the first light radiated to the eye within a predetermined angular range relative to an axis of vision of the eye, the incident angle changing member scans the incident angle within the predetermined angular range during a measurement, the photo detector detects the interfering light of each scan angle and outputs an interference signal of each scan angle to the processor, the interference signal of each scan angle includes a first signal component and a second signal component, the first signal component being created by the second reflected light and reflected light from a front surface of the measuring portion, and the second signal component being created by the second reflected light and reflected light from a rear surface of the measuring portion, the processor that determines the position of the measuring portion inside the eye based on the detected interfering light further comprises the processor determining a position of the front surface of the measuring portion based on the first signal component of the interference signal of each scan angle in a depth direction of the eye and the processor determining a position of the rear surface of the measuring portion based on the second signal component of the interference signal of each scan angle in a depth direction of the eye, the optical measurement system further comprises a focal point adjustment mechanism that changes a focal point of the first light for matching front and rear surfaces of the measuring portion, and an optical path length changing mechanism that changes an optical path length between the light source and the eye, the focal point adjustment mechanism comprises a first convex lens disposed on a focal aim of the optical measurement system, a second convex lens disposed on the focal aim of the optical measurement system between the first convex lens and the eye, and an actuator that moves the second convex lens relative to the first convex lens in the focal aim direction, and the optical path length changing mechanism comprises a corner cube disposed on the focal aim of the optical measurement system and an actuator that moves the corner cube in order to change the optical path length between the light source and the eye. |
