Phase modulator, lighting system, and projector
US11258994B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Jul 19, 2018 |
| Grant date | Feb 22, 2022 |
| Priority date | — |
| Expiry date | Jul 19, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B21/14
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An object of the present disclosure is to provide a phase modulator, a lighting system, and a projector that allow for improving diffraction efficiency in a light phase modulation element. The phase modulator according to the present disclosure includes a light phase modulation element that has a plurality of pixels arranged with the pixel pitches p being different from each other to have a pixel structure suppressing occurrence of high-order diffraction light and that modulates a phase of light with respect to each of the pixels. Moreover, the phase modulator according to the present disclosure includes a capturing optical system that captures a plurality of fluxes of high-order diffraction light generated in each of the pixels.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.