Patent ID: 6130437
Filing Date: 2000-10-10
Classification: G01B,Y10S

Abstract:
A sensor for detecting an edge of a substantially flat object, the sensor comprising:at least one transmitter for emitting at least one respective light beam toward the edge of said substantially flat object to be detected; andat least one receiver for receiving light reflected from the edge of said substantially flat object when said object intersects the at least one light beam, and for generating a signal responsive to the light reflected from the edge of said substantially flat object;wherein the at least one transmitter is constructed to emit a converging, focused light beam in a first plane for precise detection of said object, said focused light beam being a diverging light beam in a second plane, such that a portion of the reflected light is diverging and is received by the receiver over a wide angle of coverage; wherein said first plane is disposed at an angle to said second plane.