Patent ID: 6124586
Filing Date: 2000-09-26
Classification: F16P,G01V

Abstract:
A method of geometric alignment of two spaced light curtain support elements, optionally support bars (17, 19) defining, respectively, a radiation transmitting support element (17) and a radiation receiving support element (19),a plurality of radiation transmitters (13) supported on the radiation transmitting support element, and a plurality of radiation receivers (15) supported on the radiation receiving support element (19),wherein the radiation from the transmitters (13) is directed towards the radiation receivers (15);and comprising, in accordance with the invention, the steps ofgenerating two respectively counter-directed alignment radiation beams (33, 33') between said radiation transmitting support element (17) and said radiation receiving support element (19),whereby the respective radiation transmitting and radiation receiving functions of said support elements are reversed with respect to one of said counter-directed beams; anddetecting each of said directly transmitted and counter-directed alignment radiation beams by respective radiation alignment detectors (35, 35'), respectively located on said radiation transmitting support element (17) and on said radiation receiving support element (19), for optimal alignment of said support elements (17, 19), with respect to each other.