| 摘要 |
An optical system with an optical unit consisting of a transmission unit with at least one transmission element for emitting optical radiation, a receiving unit with at least one receiving element for detecting optical radiation and an optical path for transmitting the optical radiation between transmission unit and receiving unit. At least one optical unit is located in the optical path to bundle and deflect the optical radiation and an optical body/optical bodies is/are assigned to either the transmission unit or the receiving unit. The optical bodies are designed as a kind of Fresnel lens and have an unstructured surface side and a structured surface side having indentations with steep flanks large slope angle and a small prism angle. The structured surface side of the optical body with indentations forms a first boundary surface for total reflection and a second boundary surface for refracting the optical radiation emitted from the transmission unit or the optical radiation detected by the receiving unit and is turned away from either the transmission unit or the receiving unit.
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