Projector capable of projecting polarized illumination light
US6005655A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 28, 1997 |
| Grant date | Dec 21, 1999 |
| Priority date | — |
| Expiry date | Oct 28, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N5/7441
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A projector is provided with a first lens array, a polarized beam splitter for splitting a beam of light into beams of linearly polarized light components whose polarization axes are normal to each other, a second lens array in vicinity of a position where the beams of linearly polarized light components converge, and a converter for converting one of the linearly polarized light components so as to have the same axes of polarization as the other linearly polarized light components. The polarized beam splitter includes a prism having the following relationship: ##EQU1## wherein .psi. denotes an angle of incidence with respect to the parallel plate, W denotes a width of the first lens, H denotes a height of the first lens, F denotes a focal length of the first lens, and N denotes a refractive index of the prism.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.