Helmet mounted display
US5341242A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 4, 1992 |
| Grant date | Aug 23, 1994 |
| Priority date | — |
| Expiry date | May 4, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B2027/0143
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A display, for example, for a visor attached to a helmet, the visor having a partially reflecting semi-transparent portion in the view of the wearer and an optical projector for projecting an image onto the semi-transparent portion for reflection therefrom. The semi-transparent portion has a relatively higher reflectivity in a central area thereof and a relatively lower reflectivity in an annular area outside the central area. In one aspect of the invention, the head mounted display includes a projector having a display source whereon an image is formed and an optical system for focusing the image at separate sagittal and tangential foci between the image-forming surface and the semi-transparent portion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.