Method of, and apparatus for, detecting optical axis of headlamp

Details Method of, and apparatus for, detecting optical axis of headlamp Method of, and apparatus for, detecting optical axis of headlamp

1994-01-04

1995-01-03

Rosenberger, Richard A.

Optics: measuring and testing

Lamp beam direction or pattern

382 1, G01M 1106

Patent

active

053791045

ABSTRACT:
In a method of detecting optical axis of a headlamp, according to the present invention, an image of the light projected onto the screen is segmented grid by grid on the reference grid plane, a test window set in the reference grid plane is moved and the illuminance of the light incident upon a CCD corresponding to each grid in a test window B set in the reference grid plane is integrated each time the test window B is moved, and the center of the test window C when the integrated illuminance reaches a maximum value is detected as the optical axis position. According to the present invention, it is possible to positively detect an headlamp optical axis even if a plurality of hot zones exists.

REFERENCES:
patent: 4609939 (1986-09-01), Kozawa
patent: 4634275 (1987-01-01), Yoshida

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