Patent ID: 9459372
Filing Date: 2016-10-04
CPC Classification: G01S,G01V

Claim Text:
1. A background suppression device comprising emitting means emitting a light beam emitted in a set direction; optoelectronic receiving means which is suitable for receiving a light beam reflected by an object and for providing a first and a second signal; processing means that is suitable for receiving, in a detecting condition of said device, said first and said second signal and for providing an output information signal, as a function of said first and said second signal, indicating the presence or absence of said object within an interval of set distances; wherein said processing means is suitable for storing, in a calibrating condition of said device during which a calibrating procedure for said device is performed, said first and said second signal and for providing said output information signal as a function of said first and/or said second signal obtained in said detecting condition and of said first and/or said second signal stored in said calibrating condition, wherein a set limit distance of said interval of set distances is selectable in an interval of operational work distances, said emitted light beam not being focused or being substantially collimated in said interval of operational work distances, wherein said emitted light beam has a diameter when impinging at a background that is greater than a desired minimum diameter value, said device comprising a focussing lens or collimating lens between said emitting means and said background, and wherein the device further comprises adjusting and calibrating means allowing manual control of an adjustable receiving lens to direct the reflected light beam to different positions of the optoelectronic receiving means.