Method and device for measuring the angular position of a rectilinear contrasting edge of an object, and system for fixation and tracking a target comprising at least one such contrasting edge
US9074872B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Dec 9, 2010 |
| Grant date | Jul 7, 2015 |
| Priority date | — |
| Expiry date | Nov 23, 2031 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF41G7/20
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The present invention relates to a method for measuring the angular position of a contrasting edge of an object having a luminance transition zone which is substantially rectilinear in a given direction and separates two regions of different luminances. This method comprises the functional steps of: —carrying out, in a transverse direction different from the given direction, an amplitude modulation of the signals delivered by a first and a second optical sensor; and —calculating an output signal (Yout(t)) starting from the signals delivered by the first and the second optical sensors (D1, D2) as a function of the angular position of the luminance transition zone. Device and set of devices for measuring the angular position of a contrasting edge and steering aid system for fixation and tracking a target comprising at least one such contrasting edge.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.