Patent ID: 7425695

Claim:
Light tester for vehicles, comprising at least one measurement head that detects the rays emitted by the light unit under test, said measurement head has a ray selection unit that has passages for the rays, behind which passages is located at least one ray detection unit, wherein the ray selection unit consists of perforated plates, which are arranged behind one another and spaced apart, wherein the passages are all equally sized and the perforated plates are all of identical design, wherein all the passages of each of the perforated plates have the same center-to-center distance from one another and wherein all the passages are either circular or hexagonal, wherein the spacing between the perforated plates are different and corresponds to the relationship a(i+1)=a(i)×R/D, where i=0, 1, 2 . . . , D is the diameter of the passages, R is the center-to-center distance of the passages from one another, and a(0) is the thickness of the perforated plate.