An optical transmission/reception unit, comprising: a carrier rotatable around an axis of rotation, an optical receiver arranged at the carrier on the axis of rotation so as to receive an optical reception signal from a first direction, an optical transmitter arranged at the carrier adjacent to the optical receiver so as to emit an optical transmission signal in a second direction, and transmission/reception optics arranged at the carrier on the axis of rotation above the optical receiver and extending across the optical receiver and the optical transmitter, wherein the transmission/reception optics include reception optics and transmission optics integrated in the reception optics, wherein the reception optics are configured to guide the optical reception signal striking the transmission/reception optics towards the optical receiver on the axis of rotation, and wherein the transmission optics are configured to guide the optical transmission signal emitted by the optical transmitter onto the axis of rotation so that a transmission beam propagates from the transmission/reception optics along the axis of rotation, characterized in that the transmission optics are formed by a portion of a surface of the reception optics facing away from the optical receiver, the second portion is configured to deflect the optical transmission signal received from a transmission face in parallel to the axis of rotation, the portion is formed by a recess in the surface of the reception optics facing away from the optical receiver, and the function of the transmission face is realized by suitable shaping of the surface of the reception optics facing away from the optical receiver. a carrier rotatable around an axis of rotation, an optical receiver arranged at the carrier on the axis of rotation so as to receive an optical reception signal from a first direction, an optical transmitter arranged at the carrier adjacent to the optical receiver so as to emit an optical transmission signal in a second direction, and transmission/reception optics arranged at the carrier on the axis of rotation above the optical receiver and extending across the optical receiver and the optical transmitter, wherein the transmission/reception optics include reception optics and transmission optics integrated in the reception optics, wherein the reception optics are configured to guide the optical reception signal striking the transmission/reception optics towards the optical receiver on the axis of rotation, and wherein the transmission optics are configured to guide the optical transmission signal emitted by the optical transmitter onto the axis of rotation so that a transmission beam propagates from the transmission/reception optics along the axis of rotation, characterized in that the transmission optics are formed by a portion of a surface of the reception optics facing away from the optical receiver, the second portion is configured to deflect the optical transmission signal received from a transmission face in parallel to the axis of rotation, the portion is formed by a recess in the surface of the reception optics facing away from the optical receiver, and the function of the transmission face is realized by suitable shaping of the surface of the reception optics facing away from the optical receiver.