An optical array system for performing pupil tracking using retro-reflectivity includes an LED array an image sensor and a processor. The LED array includes at least one on-axis LED and at least one off-axis LED, for illuminating pupils of a user within an active region. The camera is arranged for capturing images of the pupils illuminated by the LED array. The processor is coupled to the camera, for receiving the captured images and performing processing algorithms on them to isolate pupil information and thereby determine pupil presence and location within the active region.用於以逆反射進行瞳孔追蹤的光學陣列系統,包含一發光二極體陣列、至少一影像感測器及一處理器。該發光二極體陣列包含至少一同軸發光二極體及至少一離軸發光二極體,用以照明位在一主動區之一使用者之瞳孔。該至少一影像感測器係用以擷取被該發光二極體陣列光照後之瞳孔的影像,以產生複數個擷取影像。該處理器係耦接於該影像感測器,用以接收該複數個擷取影像並對該複數個擷取影像作演算法處理以分離出瞳孔資訊,並據以判斷該主動區內的瞳孔存在及位置。200‧‧‧光學陣列208‧‧‧發光二極體內環215、217‧‧‧發光二極體外環220‧‧‧中央面板240‧‧‧右側平板250‧‧‧影像感測器260‧‧‧左側面板280‧‧‧處理器
