{
  "$type": "site.standard.document",
  "description": "A predetermined lighting pattern is projected on a surface to be illuminated and the lighting pattern is displaced on the surface to be illuminated. A laser beam generated by a laser light source is broadened by a magnifying lens so as to generate a divergent light. The divergent light is shaped by…",
  "path": "/patents/1249044",
  "publishedAt": "2019-11-28T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "G03H1/2202",
    "Dai Nippon Printing Co., Ltd."
  ],
  "textContent": "A predetermined lighting pattern is projected on a surface to be illuminated and the lighting pattern is displaced on the surface to be illuminated. A laser beam generated by a laser light source is broadened by a magnifying lens so as to generate a divergent light. The divergent light is shaped by the collimation lens into a parallel illumination light, and the parallel illumination light is caused to be incident on an incident plane of a diffraction optical element which records a hologram image. A diffracted light from the diffraction optical element forms the lighting pattern as a hologram reconstructed image on the surface to be illuminated. By translating the collimation lens by a collimation-lens drive unit along a movement plane that is orthogonal to an optical axis of the laser beam, the lighting pattern can be displaced on the surface to be illuminated.",
  "title": "ILLUMINATION DEVICE"
}