Meniscus head up display combiner
US7397606B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 4, 2005 |
| Grant date | Jul 8, 2008 |
| Priority date | — |
| Expiry date | Mar 29, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B2027/012
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A meniscus combiner for a head up display (HUD) system. The meniscus combiner includes a meniscus lens; a multi-layer dichroic coating formed on a first surface of the meniscus lens; and, an anti-reflection coating formed on a second, opposite surface of the meniscus lens. The meniscus combiner preferably utilizes a non-symmetric aspheric meniscus lens which simplifies the optical system of the image source (overhead or in-dash unit) minimizing aberrations and minimizing costs. The meniscus combiner may be fabricated utilizing a number of lens sections which may be bonded together and blended. Use of multiple lens sections provides the ability to easily optimize the lens design. Alternatively, the meniscus combiner can be fabricated from a single lens.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.