摘要 |
<p>An optical system and method for detecting the presence and location of at least one stationary or moving object in a field. The optical system has at least one light source (20) to generate a beam (30), which beam is scanned by at least one first reflecting surface (40) to generate a plurality of beams (45). The beams are overlapped across the field (50) by at least one second reflecting surface (60) and their intensity is measured by at least one detection means (70).</p> |