{
  "$type": "site.standard.document",
  "description": "The raindrop and dirt particle sensor (1) has first and second LED's (3,4) and a photocell (5) for receiving reflected light, mounted on a conducting circuit board (6). A transparent optical coupling block (7) oscillator glued to the inside surface of the windscreen (2) has several lenses. It…",
  "path": "/patents/1083981",
  "publishedAt": "2004-09-15T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "B60S1/0818",
    "VALEO SCHALTER & SENSOREN GMBH [DE]"
  ],
  "textContent": "The raindrop and dirt particle sensor (1) has first and second LED's (3,4) and a photocell (5) for receiving reflected light, mounted on a conducting circuit board (6). A transparent optical coupling block (7) oscillator glued to the inside surface of the windscreen (2) has several lenses. It directs a beam of light from the first LED onto the outer surface of the windscreen at a shallow angle, and it is totally internally reflected from a clean surface. Some light escapes if a drop of water is present. The second LED provides a beam of light which may be reflected off dirt particles.",
  "title": "Method for operating a detector of irregularities on a transparent object"
}