Patent ID: 9074872
Filing Date: 2015-07-07
Classification: F41G,G01B

Abstract:
1. 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, wherein the method comprises at least 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, by angular vibration of the optical axes of the first and second optical sensors, according to a given vibrational law, the vibration of the optical axes of the first and second optical sensors causing a vibration of the inter-receptor angle of the first and second optical sensors, the inter-receptor angle being delimited by the optical axes of the first and second optical sensors and containing the object with the luminance transition zone; calculating an output signal starting from the signals delivered by the first and the second optical sensors as a function of the angular position of the luminance transition zone, the output signal being independent of the vibrational law, and dependent on the angular position of the luminance transition zone relative to the mean optical axis of the device.