{
  "$type": "site.standard.document",
  "description": "Geodetic unit (1), especially a total station or distance meter, has a laser light source with at least a radiation producing laser diode (2b). The latter has an external cavity with at least a mono-selective component (2d) for selection of a single mode characteristic or monochromatic laser…",
  "path": "/patents/1079110",
  "publishedAt": "2005-03-23T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "G01C15/002",
    "LEICA GEOSYSTEMS AG [CH]"
  ],
  "textContent": "Geodetic unit (1), especially a total station or distance meter, has a laser light source with at least a radiation producing laser diode (2b). The latter has an external cavity with at least a mono-selective component (2d) for selection of a single mode characteristic or monochromatic laser radiation. The selective component can be a linear emitter or a vertical semiconductor emitter driven by an external cavity in which there is a mono-selective component, e.g. a monomode fiber or resonating mirror that results in a mono-selective resonance effect. To compensate the longer pulse duration caused by the elongated cavity, components with negative dispersion can be used for pulse compression.",
  "title": "Geodetic apparatus with laser source"
}