| Patent Number |
Title Of Patent |
Date Issued |
| 5640275 |
Head-up display device of holographic type |
June 17, 1997 |
| The device allows to compensate for the aberrations of the collimating and combining holographic optics by using a simplified scheme for the relay optics. Said relay optics comprises six lenses and a window; it is terminated at each end by a plane side and is disposed in a case. Said |
| 5453877 |
Optical system of collimation notably for helmet display unit |
September 26, 1995 |
| The system is designed to be mounted in a air pilot's helmet. It uses a confocal assembly with a first parabolic mirror and a second parabolic mirror, placed downline of a collimation objective which gives a collimated radiation. The first mirror is totally reflective and the second |
| 5313054 |
Method and device for determining the orientation of a solid |
May 17, 1994 |
| In an optical device for determining parameters that give the orientation of any solid within a given space, a first solid is fitted with at least one single-beam device producing a beam of light rays substantially parallel to a direction u.sub.i known in a coordinate system R.sub.s boun |
| 5170153 |
Optical device for the display of light data collimated to infinity |
December 8, 1992 |
| In an optical device for the display of light data collimated to infinity, an image generator associated with a collimation optical device gives the eye an image collimated to infinity. The light source that illuminates the image generator is controlled so that the position of its illumi |
| 5153774 |
Optic device for the introduction of a superimposed image into the visual field of an observer |
October 6, 1992 |
| 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 |
| 5124821 |
Large-field holographic binocular helmet visor |
June 23, 1992 |
| The visor makes it possible to obtain in binocular vision a large field of 60.degree. in the vertical plane and 120.degree. in the horizontal plane. In the case of each monocular vision channel, the visor is constituted by: an image generator such as a miniature cathode-ray tube, for exa |
| 5076664 |
Optical device enabling the introduction of a collimated image in an observer's field of vision |
December 31, 1991 |
| Disclosed is an optical device designed to enable an observer to look simultaneously at what is normally in his field of vision and at a colllimated image introduced so as to be superimposed on his field of vision, by total reflections in a strip with parallel faces forming an optica |
| 4983015 |
System for the display of color images using an optical mixer with fibers in ordered arrangement |
January 8, 1991 |
| The optical mixer disclosed enables, through optic fibers, a precise superimposition, in a plane of observation, of identical elementary images with distinct chrominance values. It comprises n (n being a whole number greater than 1) display devices to form n monochrome elementary images |
| 4874214 |
Clear holographic helmet visor and process of producing same |
October 17, 1989 |
| The visor can be readily mounted on a helmet by virtue of the fact that it dispenses with the need for any optical relay system. Provision is made for a light image generator, an optical combining and collimating assembly in which a holographic flat plate and a holographic spherical plat |
| 4810056 |
Collimated relief display device |
March 7, 1989 |
| The device provided makes it possible to see a collimated light image in relief. It is formed from a conventional collimator assembly comprising a convergent lens at the focal point of which the light representation to be collimated is placed. This light representation may be formed on t |
