Linear array eye tracker
CA 2378830 A1 · Owner: Visx, Incorporated · Inventors: Yee, Kingman
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
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.
Read the whole patent
Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed August 1, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 1, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 1, 2022.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.