Linear array eye tracker

A - Human Necessities – 61 – B

Patent

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A61B 3/00 (2006.01) A61F 9/01 (2006.01) A61B 3/113 (2006.01) A61F 9/008 (2006.01)

Patent

CA 2378830

(57) Abstract: Improved devices, systems, and methods for sensing and tracking the position of an eye make use of the contrast between the sclera and iris to derive eye position. In many embodiments, linear photodetectors extend across the pupil, optionally also extending across the iris to the sclera. A pair of such linear photodetectors (42a and 42b) can accurately sense and measure one-dimensional positioning error and provide feedback to a one-dimensional positioning apparatus, resulting in a single, highly linear system capable of accurate position tracking.

L'invention concerne des dispositifs, des systèmes et des procédés améliorés de détection et de suivi de la position d'un oeil permettant l'utilisation du contraste entre la sclère et l'iris pour déterminer la position de l'oeil. Dans plusieurs modes de réalisation, des photodétecteurs linéaires s'étendent depuis l'iris jusqu'à la sclère. Une paire de photodétecteurs linéaires de ce type (42a, 42b) peut détecter et mesurer avec précision une erreur de positionnement unidimensionnelle, et envoyer un retour d'information vers un appareil de positionnement unidimensionnel, d'où la production d'un système simple et hautement linéaire assurant un suivi de position précis.

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