An apparatus including a wavefront sensor including a light source configured to illuminate a subject eye, a detector, an image sensor configured to output an image of the subject eye, a first beam deflecting element configured to intercept a wavefront beam returned from a subject eye when the subject eye is illuminated by the light source and configured to direct a portion of the wavefront from the subject eye through an aperture toward the detector and a controller, coupled to the light source, the image sensor and the beam deflecting element, configured to process the image to determine transverse movement of the subject eye and to control the beam deflecting element to deflect and project through the aperture portions of an annular ring portion of the wavefront and further configured to pulse the light source at a firing rate to sample selected portions of the annular ring at the detector, to process the image of the subject eye to calculate transverse movement of the subject eye and to orient the beam deflecting element at a DC offset angle to compensate transverse movement of the subject eye.本發明提供一種裝置,其包括一波前感測器,該波前感測器包括:一光源,其經組態以照明一受檢者眼睛;一偵測器;一影像感測器,其經組態以輸出該受檢者眼睛之一影像;一第一光束偏轉元件,其經組態以在一受檢者眼睛由該光源照明時截獲自該受檢者眼睛返回之一波前光束且經組態以引導來自該受檢者眼睛之該波前之一部分穿過一光圈朝向該偵測器;及一控制器,其耦接至該光源、該影像感測器及該光束偏轉元件,該控制器經組態以處理該影像以判定該受檢者眼睛之橫向移動且控制該光束偏轉元件以偏轉及投影該波前之一環形圈部分之多個部分使其穿過該光圈且經進一步組態以按一發射速率用脈衝輸送該光源以在該偵測器處對該環形圈之選定部分取樣,以處理該受檢者眼睛之該影像以計算該受檢者眼睛之橫向移動且以一DC偏斜角定向該光束偏轉元件以補償該受檢者眼睛之橫向移動。202‧‧‧補償透鏡或窗204‧‧‧第一透鏡212‧‧‧微電子機械系統(MEMS)光束掃描/移位/偏轉鏡216‧‧‧第二透鏡218‧‧‧波前取樣光圈220‧‧‧子波前聚焦透鏡222‧‧‧象限偵測器235‧‧‧發光二極體(LED)(或陣列)240‧‧‧第三透鏡242‧‧‧第四透鏡252‧‧‧反射鏡260‧‧‧成像光束分光器261‧‧‧二向色或短通光束分光器262‧‧‧影像感測器264‧‧‧注視目標266‧‧‧注視/成像光束分光器268‧‧‧透鏡或透鏡集合270‧‧‧透鏡或透鏡集合272‧‧‧超發光二極體(SLD)274‧‧‧偏光光束分光器(PBS)276‧‧‧帶通濾波器277‧‧‧光圈278‧‧‧動態波前/散焦抵銷器件280‧‧‧掃描鏡282‧‧‧掃描鏡284‧‧‧超發光二極體(SLD)光束形狀操縱透鏡286‧‧‧透鏡288‧‧‧單模光纖(諸如,維持偏光(PM)單模光纖)290‧‧‧光纖耦合器292‧‧‧參考臂294‧‧‧偵測器299‧‧‧內部校準目標
