Wide field high optical efficiency display device
US4830464A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 3, 1987 |
| Grant date | May 16, 1989 |
| Priority date | — |
| Expiry date | Feb 3, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B2027/0145
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A display device with wide field and high optical efficiency is provided including an optical assembly having a spherical holographic mirror used on the axis and a semitransparent mirror. A generator of light images emits a radiation which strikes first of all the convex phase of the spherical mirror, passes through it, and is then reflected by the semitransparent mirror in the direction of the spherical mirror, which reflects it and finally sends it towards the observer. This optical collimation and combination assembly is included in a transparent medium formed by a glass plate with parallel faces and forming a stigmatic optical system at infinity, required for the correct reception of the radiation coming from the outside landscape.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.