Optoelectronic sensor for detecting objects in a monitored area

An optoelectronic sensor(S) for detecting objects in a monitored area, comprising:

• a rotating optical unit (1) with at least one light transmitter (4) for emitting light beams (SL), at least one light receiver (5) for receiving light (EL) reflected by objects in the monitored area, and associated electronics (6) for controlling the optical unit (1);
• a drive unit (2) for rotating the rotating optical unit (1);
• a stationary housing (3) for enclosing at least the rotating optical unit (1), the stationary housing (3) having at least one window region (3C) which is transmissive to the emitted light beams (SL) and the received light (EL);
• and
• heat exchange elements (8) which are provided on an outside of the optical unit (1) and are arranged such that the heat exchange elements (8) rotate together with the rotating optical unit (1),
• wherein flat sides (8A) of the heat exchange elements (8) lie at a defined distance (A) from an inner side (I) of the stationary housing (3), and
• wherein at least two of the heat exchange elements (8) are arranged diametrically on a circumference of the rotating optical unit (1) such that optical elements of the at least one light emitter (4) and the at least one light receiver (5) are arranged between the at least two of the heat exchange elements (8).