Optoelectronic sensor and method for detecting objects

An optoelectronic sensor for detecting objects in a monitored zone, the optoelectronic sensor comprising:

• at least one light transmitter for transmitting a plurality of mutually separated light beams starting from a respective one transmission point;
• a transmission optics for the transmitted light beams;
• at least one light receiver for generating a respective received signal from the remitted light beams reflected from the objects and incident at a respective reception point;
• a reception optics for the remitted light beams;
• and
• an evaluation unit for acquiring information on the objects from the received signals,
• wherein at least one of the reception optics and the transmission optics is a two-lens objective for an annular image field with an image field angle α that has a first lens and a second lens, with the first lens being configured such that light beams of every single transmission point and/or reception point with an image field angle α only impinge on half of the second lens.