Ferroelectric liquid crystal phase-only modulator with one ferroelectric liquid crystal spatial light modulator's smectic layers orthogonal to another's
US5477354A · kind A · utility
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4References
3Claims
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Key dates
| Filing date | Nov 21, 1994 |
| Grant date | Dec 19, 1995 |
| Priority date | — |
| Expiry date | Nov 21, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F2203/50
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A phase only spatial light modulating device for variably changing the phase of light passing through the device without changing the polarization of the light. Two analog state ferroelectric liquid crystal phase only spatial light modulators are placed such that their smectic layers are orthogonal to each other. The angle of the molecules in the two modulators is controlled to be at the same angle. Whereby light passing through both of the modulators obtains a phase delay for arbitrary polarized input light without amplitude modulation or change in polarization state.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.