{
  "$type": "site.standard.document",
  "description": "An image measuring system comprises a projection optical system 5 which has a light projection optical axis 26 and a light source 27 for emitting an illumination light 29, and projects the illumination light through the light projection optical axis, a photodetection optical system 6 which has a…",
  "path": "/patents/991195",
  "publishedAt": "2013-05-01T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "G01C11/06",
    "TOPCON CORP [JP]"
  ],
  "textContent": "An image measuring system comprises a projection optical system 5 which has a light projection optical axis 26 and a light source 27 for emitting an illumination light 29, and projects the illumination light through the light projection optical axis, a photodetection optical system 6 which has a photodetection optical axis 15 and an image pickup element 13, and receives a retroreflection light 29' from an object to be measured by the image pickup element through the photodetection optical axis, and a control arithmetic device 7 for processesing the data taken by the image pickup element, and in the image measuring system, the projection optical system comprises a light projection unit 25 for directing the light projection optical axis toward the an object to be measured and projecting the illumination light, a projection angle changing means 23, 33 for rotating the light projection unit in an elevating direction and a horizontal direction and for changing a projection angle of the illumination light, and a direction detecting means 24 for detecting a direction angle of the light projection optical axis with respect to the photodetection optical axis.",
  "title": "Image measuring system"
}