{
  "$type": "site.standard.document",
  "description": "A virtual image display device includes: a display unit that generates an image display light by modulating an illumination light; and a projection optical system that includes a concave mirror for reflecting the image display light toward a virtual image presentation plate and a convex lens…",
  "path": "/patents/1245689",
  "publishedAt": "2019-10-10T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "G02B27/0101",
    "JVC KENWOOD Corporation"
  ],
  "textContent": "A virtual image display device includes: a display unit that generates an image display light by modulating an illumination light; and a projection optical system that includes a concave mirror for reflecting the image display light toward a virtual image presentation plate and a convex lens provided between the display unit and the concave mirror. The display unit is provided at a position closer to the convex lens than a focal point, within a meridional plane, of a composite optical system formed by the virtual image presentation plate and the projection optical system.",
  "title": "VIRTUAL IMAGE DISPLAY DEVICE"
}