Optics: measuring and testing – Lamp beam direction or pattern
Patent
1984-07-17
1987-03-03
Rosenberger, R. A.
Optics: measuring and testing
Lamp beam direction or pattern
356154, G01J 100
Patent
active
046471952
ABSTRACT:
A headlamp testing method of the invention involves the steps of applying the low beam of the headlamp onto a screen, determining the position of the geometrical center of a closed area of illuminance higher than a predetermined level, determining the position of a cut off line cross point from the position of the geometrical center and a predetermined amount of offset, and determining a presumption line cut off line from the cut off line cross point. The presumption line thus determined is displayed together with a mark which indicates the within which the cross point should fall, and the headlamp beam is judged as being acceptable when the cross point is located within this range.
REFERENCES:
patent: 3077139 (1958-07-01), Todd et al.
Ishikawa Soichi
Kozawa Kunio
Yoshida Mamoru
Cooper Crystal D.
Rosenberger R. A.
Toyota Jidosha & Kabushiki Kaisha
LandOfFree
Automotive headlamp testing method and apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Automotive headlamp testing method and apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Automotive headlamp testing method and apparatus will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1014252