Optic device for the introduction of a superimposed image into the visual field of an observer
US5153774A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 29, 1991 |
| Grant date | Oct 6, 1992 |
| Priority date | — |
| Expiry date | May 29, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B2027/012
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Disclosed is an optic device designed to enable an observer to look simultaneously at what is normally in his visual field and at a collimated image that is introduced so as to be superimposed on his visual field. The optic device has a plate with parallel faces in which the light rays coming from an image generator, through an access point, get propagated by total reflection on the parallel faces. A slab, formed by a stacking of plane mirrors, reconcentrates the light rays and directs them towards two successive, semi-reflecting mirrors which reflect them partially towards the observation pupil. The semi-reflecting mirrors are in the visual field of an observer's eye placed at the observation pupil.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.