Apparatus and method for characterizing the luminous intensity o

Details Apparatus and method for characterizing the luminous intensity o Apparatus and method for characterizing the luminous intensity o

1996-05-06

1998-03-17

Font, Frank G.

Optics: measuring and testing

Lamp beam direction or pattern

G01J 100

Patent

active

057293368

ABSTRACT:
Apparatus for determining the luminous intensity distribution of an automotive head light employs a curved mirror and a curved screen. A solid state camera is used to obtain a pattern of the head light output from the screen. The system requires a relatively small black box into which the head light output is directed. A beam splitter may be employed to relax the constraints on the positioning of the various components within the box. The setting of the test lamp to first and to second preset lateral angular positions at each of which a pattern is captured and the combining of the two patterns permits the use of components which are practical. The use of a linear CCD array permits economies to be obtained by rotating the test lamp or the linear array over a sequence of angular positions and by constructing a composite pattern from the patterns so generated.

REFERENCES:
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patent: 2291114 (1942-07-01), Squyer
patent: 4948249 (1990-08-01), Hopkins et al.
patent: 5504574 (1996-04-01), Murata
Advances in Measurement Technologyfor Vehicle lighting Systems by Ian Lewin, Automotive Design Advancements in Human Factors; Improving Driver's Comfort and Performance; International Congress and Exposition, Detroit, Michigan, Feb. 26-29 1996, pp. 107-114.

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