Projection screen with retro-reflective calibration points, placement tool and method
US5638208A · kind A · utility
20Cited by
6References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 23, 1996 |
| Grant date | Jun 10, 1997 |
| Priority date | — |
| Expiry date | Jul 23, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B21/56
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
In a multiple-projector concave-screen display system, spacial alignment of images on the screen, is enabled by designating calibration points with retro-reflective dots and illumination markers. The manufacture of the screen involves locating calibration points and depositing the dots with a tool utilizing a rotary mechanism for loading and applying the dots from solenoid actuated pod units. Areas for retro-reflective dots, versus illumination markers, are defined on the basis of reflectance angles between vectors to the screen from a projector and from the screen to a viewer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.