Head mounted display viewing optics with improved optical performance
US6349004B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 13, 2000 |
| Grant date | Feb 19, 2002 |
| Priority date | — |
| Expiry date | Jul 13, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B27/0172
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A lens design form is used for a viewing optical system or magnifier that includes a cemented doublet and a weak aspheric element, for example, made of acrylic, and having a diffractive kinoform surface superimposed on the surface profile of the aspheric element. The design significantly reduces both chromatic aberrations and minimizes most of the monochromatic aberrations of the optical system or magnifier. By allowing the lens design form to produce an image on a curved surface, optical performance is improved further over the prior art systems because this allows the elements in the system to control the image blurring aberrations rather than having to also control field curvature. The human eye can accommodate for the curved field, and thus the curved field does not reduce image quality, but instead allows image quality to be enhanced. The viewing optical system also can be used for image projection.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.