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    • 4. 发明申请
    • AUTOREFRACTOR FOR DETECTING LIGHT INTENSITIES TO EXTRACT HIGHER-ORDER REFRACTIONS AND METHOD FOR USE
    • 用于检测轻度强度以提取高阶折射的自动装置和使用方法
    • WO2007082146A2
    • 2007-07-19
    • PCT/US2007060136
    • 2007-01-05
    • DAPHNE INSTR INCSHINN ALANYANCEY DONSCHNELL URBANCAMPBELL CHARLES ENIEDERHAUSER JOEL
    • SHINN ALANYANCEY DONSCHNELL URBANCAMPBELL CHARLES ENIEDERHAUSER JOEL
    • G01J3/02
    • A61B3/1015G01J1/0448
    • An autorefractor is capable of determining higher order refraction characteristics of a patient's eye. An incident light beam projects into the patient's eye, producing a refracted light beam, which passes through a detector lens to produces a converged beam falling upon first and second sensors. Focal length of the detector and/or sensor position are variable. Focal length and/or position are changed so that one of the sensors lies in a position that corresponds to a retinal conjugate of the patient's eye, and first photosensor data is gathered. The first photosensor data is analyzed to determine retinal deep scatter. Then, the focal length and/or sensor position is changed so that the converged light that falls upon the sensor takes up a relatively larger area, producing second photosensor data. The determined retinal deep scatter from first photosensor data is subtracted from the second photosensor data.
    • 自动折射器能够确定患者眼睛的高阶折射特性。 入射光束投射到患者的眼睛中,产生折射光束,该光束通过检测器透镜以产生落在第一和第二传感器上的会聚光束。 检测器和/或传感器位置的焦距可变。 改变焦距和/或位置,使得传感器中的一个位于对应于患者眼睛的视网膜共轭的位置,并且收集第一光传感器数据。 分析第一光电传感器数据以确定视网膜深度散射。 然后,改变焦距和/或传感器位置,使得落在传感器上的会聚光占据相对较大的面积,产生第二光传感器数据。 从第二光电传感器数据中减去从第一光电传感器数据确定的视网膜深度散射。