In various embodiments, a pulse sensor (20) is provided for sensing the pulse of a living being, comprising: at least one light source (22), which is designed and arranged such that, during appropriate use of the pulse sensor (20), light is emitted in the direction of a tissue (30) having a blood flow of a living being, wherein the tissue (30) having a blood flow scatters the light and the scattered light is modulated subject to the pulse of the living being; at least one light detector (24), which detects at least some of the light scattered by the tissue (30); and an optical concentrator (50) for concentrating the scattered light, which optical concentrator is arranged in the light path (42, 44) of the scattered light between the tissue (30) and the light detector (24), has a first incident surface (52) through which the scattered light enters the optical concentrator (50) and a first emergent surface (54) through which the concentrated scattered light emerges from the optical concentrator (50) towards the light detector (24) and which is smaller than the first incident surface (52), the optical concentrator further being transparent to the scattered light. The first incident surface (52) of the optical concentrator (50) is larger than the first emergent surface (54) of the optical concentrator (50) and is larger than the light-sensitive surface of the light detector (24) and the optical concentrator (50) is in optical contact with the light detector (24) via the first emergent surface (54).
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