Polarization selective holographic optical element
US5013107A · kind A · utility
Inventor
Key dates
| Filing date | Sep 15, 1988 |
| Grant date | May 7, 1991 |
| Priority date | — |
| Expiry date | Sep 15, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B5/32
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A polarization-selective holographic element having first and second holographic layers, each holographic layer including holograms comprising a plurality of fringes. The holographic optical element transmits a first component of light without diffraction and diffracts a second component of the light by a selected angle. The holographic optical element diffracts the second component into only one beam. The holographic optical element can be utilized as a beam splitter which is provided with optical power, for use in an optical head, by storing holograms for cylindrical and other powers and for auto-focusing and tracking capabilities.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.