Differential interferometric light modulator and image display system
US7277216B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 3, 2005 |
| Grant date | Oct 2, 2007 |
| Priority date | — |
| Expiry date | Oct 15, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B27/281
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A differential interferometric light modulator and image display system comprises a polarizing beam splitter, a polarization displacement device and a linear array of MEMS optical phase shifting devices to modulate a line image. The polarizing beam splitter acts as both the polarizer and the analyzer in an interferometer. The polarization displacement device divides polarized light from a polarizer into orthogonal polarization components which propagate parallel to one another. The MEMS optical phase shifting device array imparts a relative phase shift onto the polarization components and returns them to the polarization displacement device where they are recombined and sent to the analyzer. The MEMS optical phase shifting devices are electronically controlled and convert electronic image data into actual light modulation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.