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Remote control system for locking/unlocking the doors of motor vehicles with aspherical toroidal lens containing multiple photodetectors

  • US 5,191,324 A
  • Filed: 02/05/1991
  • Issued: 03/02/1993
  • Est. Priority Date: 02/09/1990
  • Status: Expired due to Fees
First Claim
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1. A remote control system, in particular for locking and unlocking the doors of a motor vehicle, the system being of the type comprising a portable transmitter including means constituting a light source suitable for generating an encoded light flux, and a fixed receiver including photosensitive means designed to receive the light flux and associated with treatment means designed to decode said light flux, wherein the photosensitive means of the receiver comprise an annular lens having a toroidal aspherical outside surface in the form of a revolution toroidal aspherical surface covering 360°

  • about a vertical axis, and a plurality of photocells provided inside said revolution toroidal aspherical surface of said annular lens and uniformly spaced about said vertical axis.

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