(57) A segmented Fresnel lens with a spherical surface is described, comprising a plurality
of Fresnel lens segments able to concentrate the respective detection rays onto an
optical sensor (10) disposed in the focal region (11) of the lens, the lens (1) having
two bands one above the other (5, 6) on the outside, each with nine plastic segments
(S), whilst said Fresnel lens segments or radiation segments are (17) in number, thus
distributed from bottom to top on four bands one above the other: three segments in
the bottom band (C), five segments in the middle band (B), six segments in the middle
band (A) and three segments in the top band (D).
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