Polarization preserving DLP optical architecture
US9482875B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 14, 2012 |
| Grant date | Nov 1, 2016 |
| Priority date | — |
| Expiry date | May 14, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N13/365
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A DLP optical structure and corresponding method of controlling it are described including an optical integrator system having an optical integrator, a relay lens system, a TIR prism assembly, a digital imager, and a projection lens, said optical structure being adapted to accept a polarized light beam, said DLP optical structure comprising: at least one retarder positioned after said optical integrator for controlling the polarization state throughout said DLP optical structure, and achieving the desired polarization state after said projection lens; wherein said desired polarization state is substantially linear or circular. A DLP optical structure is also described including an optical integrator, a relay lens system, a TIR prism assembly, a digital imager and a projection lens, wherein the integrator is a fly-eye integrator for maintaining an input polarization of a light beam, and wherein said input polarization is linear or circular. DLP optical structures for use with a digital imager and a projection lens are also described, substantially as above but not including the features of the digital imager and projection lens.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.