25-09-2002 дата публикации
Номер: EP1243844A2
A projector type lamp (1) is provided, in which a projection lens (4 )is formed by combining together projection lens elements (41,42,43,44) obtained by processing a plurality of projection lenses that have identical optical axis center Z, focal length, and focal point (F3) yet have different outer diameters, and the entire projection lens appears substantially rectangular when viewed in the optical axis direction. Boundary portions (42b,43b,44b) between the plurality of processed projection lens elements (41,42,43,44) are composed of a line connecting points of intersection between a contour line of the projection lens and a line defining part of each unprocessed projection lens element being zero in thickness, as viewed in the optical axis direction. The lens surfaces (41a,42a,43a,44a) of the processed projection lens elements (41,42,43,44) are continuous with one another through stepped portions (42b,43b,44b) whose longitudinal section has a straight line substantially parallel to the optical axis.
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