Patent ID: 6690456
Filing Date: 2004-02-10
Classification: G01B

Abstract:
An optical reference system for a wheel alignment apparatus for a motor vehicle having wheels, the wheel alignment apparatus having measurement heads positioned opposite to and facing the wheels of the motor vehicle for measuring wheel alignment angles of the wheels, wherein the optical reference system comprises:a first reference camera on a first measurement head on one side of the motor vehicle; a first reference target on a second measurement head, wherein the second measurement head is opposite to the first measurement head on the same side of the vehicle, the first reference target being within the field of view of the first reference camera; a second reference target inside of a forward measurement head, wherein the second reference target is within the field of view of a second reference camera on a third measurement head opposite to the forward measurement head; and a third reference target inside of a rearward measurement head, wherein the third reference target is within the field of view of a third reference camera on a fourth measurement head opposite to the rearward measurement head and rearwards of the motor vehicle.