| 摘要 |
An eye detection system comprises a source, such as an infrared laser diode 2, for emitting a divergent beam of infrared radiation. A spatial light modulator 4 is controlled so as to act as a deflector for scanning the beam. A detector 7 detects radiation which is retro-reflected by the eye 12 back along the path of the scanning beam. The deflection angle of the SLM 4 and, for a position sensitive detector 7, the location of the centre of illumination on the detector can be used to determine the angle to the centre of the pupil of the eye 12. By subsequently detecting the angle to the glints corresponding to other sources 9 and 10, the gaze position of the eye on a screen 1 can be determined. <IMAGE> |
