Linear polarization/conversion apparatus
US5485310A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 8, 1994 |
| Grant date | Jan 16, 1996 |
| Priority date | — |
| Expiry date | Dec 8, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/13355
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A linear polarization/conversion apparatus includes a light source, a polarizing beam splitting means, first and second focusing lenses, and first to fourth total reflection mirrors. The light source includes a reflector having a paraboloid of revolution. The polarizing beam splitting means splits light from the light source into a linearly polarized transmission light component and a linearly polarized reflection light component. The first and second focusing lenses are respectively disposed to oppose exit surfaces, of the polarizing beam splitting means, from which the linearly polarized transmission and reflection light components emerge. The first and second total reflection mirrors are inclined at 45.degree. with respect to the exit surfaces, respectively, so as to totally reflect the linearly polarized transmission and reflection light components from the first and second focusing lenses. The third and fourth total reflection mirrors are respectively inclined at 45.degree. with respect to the reflection optical axes of the first and second total reflection mirrors to totally reflect the light, reflected by the first and second total reflection mirrors, in the same direction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.