Light-weight head-mounted display
US6462882B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 1, 2001 |
| Grant date | Oct 8, 2002 |
| Priority date | — |
| Expiry date | Mar 1, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B27/0172
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A display device for a display wavelength range includes an image source, a relay group made of optical elements transparent to the display wavelength range, and a reflective combiner in facing relation to the relay group. The relay group includes a glass optical wedge, a glass lens, and a group of plastic lenses including a diffractive optical element. The group of plastic lenses is positioned between the glass optical wedge and the glass lens. The relay group has the optical wedge having a front face in facing relation to the image source, and a back face; an aspheric lens module having a front face in facing relation to the back face of the optical wedge, and a back face; and an aspheric lens having a front face in facing relation to the back face of the aspheric lens module, a back face, and an optical axis. The aspheric lens module is tilted and decentered with respect to the optical axis of the aspheric lens. The relay group further includes a diffractive-optical-element lens module having a front face in facing relation to the back face of the aspheric lens, and a back face; and a positive-power lens module having a front face in facing relation to the back face of the diffr…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.