Photo-electric transducer
CA 1264367 C · Owner: Nederlandse Centrale Organisatie Voor Toegepast Natuurwetenschappelijk Onderzoek · Inventors: Xing, Yi Z.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A photo-electric transducer comprising a semiconductor wafer with, near its free surface a region of the opposite conductivity type which is transparent for radiation, adapted for generating photocurrents when being irradiated, said currents flowing through said region towards electrodes connected to circuitry for measuring the ratio between the currents flowing towards the respective electrodes so as to derive therefrom the distance beween the point of incidence of the radiation and said electrodes, said region being defined by substantially concentric circles in conformity with the trajectory of a radiation spot; in particular switching means are provided which either disable an electrode …
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
- Granted January 9, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 9, 2007.
- 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.