Best way to detect the Wide Angle Range?


I am looking for the range finder which works better with wide angle. I see most of Range finders are very directional. Is there a best way to get a distance data with almost 120 degrees from the sensor? any recommendation welcomed.


Probably the best range finder is an ultrasonic one. As you say these normally have narrow beams, which is what is required for accurately picking up one object. To make than angle wider you have several options:- 1) Replace the transducers with wide angled ones. 2) Arrange the range finder on a stepping motor and sweep through the required angle. 3) Have two or more set at different angles.