Dual projector cross-mirror actuator mechanism
US8840254B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 19, 2012 |
| Grant date | Sep 23, 2014 |
| Priority date | — |
| Expiry date | Mar 23, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B37/04
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A mirror actuator system is provided for aligning images projected onto a curved screen by dual projectors. According to a preferred embodiment, a unique screw mechanism is provided for selectively slightly warping the mirror. The screw mechanism includes a load spreader in contact with the mirror, having a groove for receiving an screw actuator for applying positive or negative pressure to the load spreader and thereby to a local area (i.e. zone) of the mirror. The actuator system of the present invention provides low cost static pressure adjustment to the mirror for maintaining the focus quality while locally modifying the geometric ‘aim’ of the mirror. The groove in the load spreader provides tolerance to prevent thermal coefficient of expansion (TCE) distortion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.