Optics: measuring and testing – Lamp beam direction or pattern
Patent
1986-04-14
1988-05-17
Rosenberger, R. A.
Optics: measuring and testing
Lamp beam direction or pattern
33288, G01J 100
Patent
active
047446552
ABSTRACT:
YAn apparatus for and a method of adjustment, in the lateral direction, of the light beam of a vehicle headlight, in its low beam position. The light beam extends on one side of a cut-off line. At least two vertically extending, elongated photoelectric cells are placed in the light beam, in such a manner that the upper part of each photoelectric cell is not illuminated by the headlight and which the lower part is illuminated, regardless of the position of adjustment, in the vertical direction, of the headlight. When the headlight is at its position of correct lateral adjustment, the electrical signals supplied by the photoelectric cells have a specified ratio. In laterally adjusting the position of the headlight, the electrical signals supplied by the photoelectric cells are brought to the specified ratio.
REFERENCES:
patent: 3077139 (1963-02-01), Todd et al.
patent: 3386333 (1968-06-01), Preston
patent: 3467473 (1969-09-01), Preston
patent: 3515483 (1970-06-01), Irwin
patent: 3532432 (1970-10-01), Mansour
patent: 3746449 (1973-07-01), Schick
patent: 3791740 (1974-02-01), Proefrock
patent: 3822944 (1974-07-01), Hopkins et al.
Rosenberger R. A.
Societe d'Automatisme et de Reglage Optique
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