Serrated prism exit aperture for managing projection flare artifacts
US10924705B1 · kind B1 · utility
0Cited by
5References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 31, 2019 |
| Grant date | Feb 16, 2021 |
| Priority date | — |
| Expiry date | Dec 31, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B5/04
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An exit aperture is set forth for placement between a prism and a projection lens capable of projecting light on a screen, comprising a frame with an opening for passing a cone of light and mounting points for securing the frame relative to the projection lens, wherein the opening has serrated edges for diffracting light incident thereon in multiple directions perpendicular to the serrated edges so as to be imperceptible when projected on the screen.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.