| 摘要 |
The general field of the invention is that of optical guides for collimated images comprising a first and a second image conductor functioning by total reflection, each conductor comprising a plurality of plates that are planar, semi-reflective, mutually parallel and inclined with respect to the plane of the external faces of the image conductors. The two conductors are arranged so as to deliver a collimated image to a large pupil. The optical guide according to the invention comprises an optical beam doubler element having substantially the shape of a rectangular parallelepiped. In its basic version, it comprises four external planar facets, two internal semi-reflective planar mirrors, said mirrors being mutually perpendicular, a planar entrance face intended to receive a collimated image, and an exit face adhesively bonded to the injection section of one of the image conductors. The invention also relates to the whole of the display device associated with this optical guide. |
| 主权项 |
1. Optical guide for collimated images comprising:
a first image conductor having substantially the shape of a rectangular parallelepiped and comprising two first faces that are planar and mutually parallel, two second faces that are planar and mutually parallel and perpendicular to the two first planar faces, a plurality of first plates that are planar, semi-reflective, mutually parallel and inclined with respect to the plane of the two first planar faces, and an injection section; a second image conductor having substantially the shape of a planar plate comprising two third faces that are planar and mutually parallel and arranged in the extension of the two second planar faces, a fourth face that is planar, perpendicular to the second planar faces and joined to one of the two first planar faces, a plurality of second plates that are planar, semi-reflective, mutually parallel and inclined with respect to the plane of the two third planar faces; wherein the guide comprises an optical beam doubler element, said doubler element having substantially the shape of a rectangular parallelepiped, and comprising two first facets that are planar and mutually parallel, two second facets that are planar, mutually parallel and perpendicular to the two first planar facets, at least one first mirror that is semi-reflective, planar and arranged at a first preset distance from one of the two first planar facets and parallel to the latter, at least one second mirror that is semi-reflective, planar and arranged at a second preset distance from one of the two second planar facets and parallel to the latter, a planar entrance face that is intended to receive a collimated image, and an exit face coincident with or in the vicinity of the injection section.
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