Head-up display combiner binocular test fixture
US5731902A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 19, 1996 |
| Grant date | Mar 24, 1998 |
| Priority date | — |
| Expiry date | Aug 19, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B2027/0169
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A dual camera test fixture that allows quantitative optical performance measurements to be made on a combiner, which is the primary optical element of a head-up display optical system. The fixture replicates an embodiment of the head-up display system, with the cameras in place of a users eyes. This configuration allows quantitative optical measurements to be made, just as the user would observe them. The test fixture makes quantitative measurements of the optical performance of individual combiners. The measurements that are made are binocular, and the measurement time is less than one minute per combiner. The test fixture determines actual coordinates of an image produced by the combiner. These coordinates allow accurate and quantitative calculations regarding the combiner to be made including vertical disparity, image distance, percent distortion, and image size. The cameras are adjustable in a manner that simulates the motion of human eyes as well as the motion of the human head. A calibration mode that is part of an operational software program is used with calibration targets and allows the cameras to be precisely positioned. This also minimizes measurement error, and provide…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.