Collimating screen simulator and method
US6563612B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 18, 2000 |
| Grant date | May 13, 2003 |
| Priority date | — |
| Expiry date | Sep 18, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03H2223/12
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A collimating screen simulator comprising a projector and a holographic diffuser screen. The projector is adapted to project a viewable image onto a focal plane that is spaced from the projector. The focal plane has a backside and a viewing side opposite the focal plane backside. In operation, the projector is able to project the image onto the focal plane backside. The holographic diffuser screen is adapted to permit light from a source and incident upon a surface of the diffuser screen to pass through the screen. The holographic diffuser screen has a first surface facing the focal plane viewing side for receiving the incident light. The holographic diffuser screen also has a second surface opposite the first surface. The holographic diffuser screen is spaced from the focal plane viewing side by a distance effective for enabling a viewer facing the second surface of the holographic diffuser screen to see collimated light exiting the holographic screen.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.