Infrared curtain systems and methods

An infrared (IR) sensor for use in a door sensor, the IR sensor comprising:

• a plurality of emitters arranged in multiple emitter rows, each emitter of the plurality of emitters configured to emit an emission beam comprising IR light;
• a plurality of receptors arranged in multiple receptor rows, each receptor of the plurality of receptors configured to receive a reception beam comprising the IR light reflected off of a surface, the multiple receptor rows comprising:
• a first row of receptors comprising first left receptors and first right receptors,
• a second row of receptors comprising second left receptors and second right receptors, and
• a third row of receptors comprising third left receptors and third right receptors;
• and
• one or more lenses, the one or more lenses comprising refractive elements configured to duplicate and direct one or more of the emission beams and one or more of the reception beams onto the surface to form an IR pattern, the IR pattern comprising multiple IR curtains.