Optical: systems and elements – Holographic system or element – Using a hologram as an optical element
Patent
1994-02-25
1996-06-25
Pellman Gross, Anita
Optical: systems and elements
Holographic system or element
Using a hologram as an optical element
359 52, 359100, G02F 11333, C09K 1902
Patent
active
055305660
ABSTRACT:
Disclosed is a class of light modulating materials comprising microdomains of ferroelectric smectic liquid crystal dispersed in a light-transmissive polymer medium. The microdomains are formed by phase separation of the liquid crystal from solution with the polymer as the polymer is solidified. The switching of the liquid crystal may be either monostable or multistable (e.g., bistable), depending on the liquid crystal and polymer. The material modulates light in either a scattering-transmissive mode or a birefringence mode. Materials operating in the scattering-transmissive mode do not require polarizers, Advantages of the materials include switching times down to the order of microseconds or less, multistable optical states, wide viewing angles and high contrast.
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Gross Anita Pellman
Kent State University
Trice Ron
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