{
  "$type": "site.standard.document",
  "description": "The device e.g. laser scanner (10), has a light transmitter (12) for transmitting a transmission light beam (18), and a light receiver (14) for receiving a reception light beam (24). An evaluation unit (16) determines a distance (d) using a run-time of the light beams. A light-impermeable element…",
  "path": "/patents/1003610",
  "publishedAt": "2012-04-11T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "G01C15/002",
    "FARO TECH INC [US]"
  ],
  "textContent": "The device e.g. laser scanner (10), has a light transmitter (12) for transmitting a transmission light beam (18), and a light receiver (14) for receiving a reception light beam (24). An evaluation unit (16) determines a distance (d) using a run-time of the light beams. A light-impermeable element screens off a central portion of a reception lens (58), such the reception light beam is incident on a pinhole diaphragm (64) in a form of a light ring. A lens element (62) e.g. concentric Fresnel lens, is arranged between another lens element (60) and the diaphragm and has a hat-shaped cross-section.",
  "title": "Device for determining a distance to an object"
}