Liquid crystal modulator including a diffuser with plural phase shifting regions
US5225920A · kind A · utility
55Cited by
5References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 4, 1991 |
| Grant date | Jul 6, 1993 |
| Priority date | — |
| Expiry date | Apr 4, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03H2225/55
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Light emitted from a coherent light source undergoes fine adjustment of its polarizing direction by a polarizing device and is directed to a liquid crystal device through a collimating optical system. The polarizing device is capable of fine-adjusting the polarizing direction in accordance with the wavelength of the incident light, thereby providing a high contrast ratio. When an image is recorded by holography using such a liquid crystal spacial light modulator, it is possible to obtain an image of high quality.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.