摘要:
Disclosed is a series of materials, which exhibit large birefringence under the influence of an applied electric field. These materials are capable of switching this large birefringence with a characteristic time on the order of 1 microsecond or less. In addition, these materials have good optical loss at this wavelength, and are stable under irradiation. These materials are suitable for fabrication of optical devices such a variable optical attenuators, switches, and modulators that respond in these time frames or slower. These materials are also suitable for use across a wide range of wavelengths. As a second component of this invention, some of these novel materials exhibit these desired optical properties (large birefringence, low loss, stability under illumination) at wavelengths as short as about 400 nm. These materials are suitable for fabrication of optical devices operating at or about 405 nm, where conventional EO materials strongly absorb and/or quickly degrade.
摘要:
This invention relates to a polymer electrolyte membrane comprising a proton conducting hydrocarbon-based polymer membrane, the polymer having a backbone and having acidic groups on side chains attached to the backbone. The invention also relates to a polymer electrolyte membrane comprising a proton conducting hydrocarbon-based polymer membrane having a phase separated morphological microstructure. The invention also relates to a polymer electrolyte membrane comprising a proton conducting membrane, the membrane comprising a basic material in combination with an acidic material selected from acidic hydrocarbon-based polymers, acidic hydrocarbon-based oligomers, and blends thereof.
摘要:
Self-assembly is defined as the ability of an active ingredient (Al), when mixed with a polymer or polymers (solid or liquid state), to form either a complex or a strong attraction with the polymer/polymers, which influences the controlled release of the total system. This Al-polymer interaction or strong attraction can form in the solid state or in solution. The Al-polymer interaction also can form when applied to a filter paper, soil, seeds, or plant vegetation substrates, where the Al and polymer self-assembles into an Al-polymer-substrate matrix or complex that influences how the Al releases from the complex or matrix in a controlled manner.
摘要:
The present invention provides both polymer sustems and electroo ptic (EO) chromophores that form the components of optical devices such as optical switches and other devices useful in an optical waveguide.
摘要:
Self-assembly is defined as the ability of an active ingredient (Al), when mixed with a polymer or polymers (solid or liquid state), to form either a complex or a strong attraction with the polymer/polymers, which influences the controlled release of the total system. This Al-polymer interaction or strong attraction can form in the solid state or in solution. The Al-polymer interaction also can form when applied to a filter paper, soil, seeds, or plant vegetation substrates, where the Al and polymer self-assembles into an Al-polymer-substrate matrix or complex that influences how the Al releases from the complex or matrix in a controlled manner.
摘要:
Improved capacitors containing novel electrodes are described. One electrode composition comprises mixed metal oxides of the transition metals nickel and cobalt in a molar ratio of 0.5:1 or greater, and optionally containing a binder and carbon nanotubes. The resulting capacitors can be characterized by superior properties including higher specific capacitance values at higher voltage scan rates than the prior art. Methods of forming the electrodes that produce superior results are also described.
摘要:
In one aspect, the present invention provides a hyperpolarizable organic chromophore. The chromophore is a nonlinear optically active compound that includes a p-donor conjugated to a p-acceptor through a p-electron conjugated bridge. In other aspects of the invention, donor structures and acceptor structures are provided. In another aspect of the invention, a chromophore containing polymer is provided. In one embodiment, the chromophore is physically incorporated into the polymer to provide a composite. In another embodiment, the chromophore is covalently bonded to the polymer, either as a side chain polymer or through crosslinking into the polymer. In other aspects, the present invention also provides a method for making the chromophore, a method for making the chromophore-containing polymer, and methods for using the chromophore and chromophore-containing polymer.
摘要:
Disclosed is a series of materials, which exhibit large birefringence under the influence of an applied electric field. These materials are capable of switching this large birefringence with a characteristic time on the order of 1 microsecond or less. In addition, these materials have good optical loss at this wavelength, and are stable under irradiation. These materials are suitable for fabrication of optical devices such a variable optical attenuators, switches, and modulators that respond in these time frames or slower. These materials are also suitable for use across a wide range of wavelengths. As a second component of this invention, some of these novel materials exhibit these desired optical properties (large birefringence, low loss, stability under illumination) at wavelengths as short as about 400 nm. These materials are suitable for fabrication of optical devices operating at or about 405 nm, where conventional EO materials strongly absorb and/or quickly degrade.
摘要:
Methods and devices for altering the power of a lens, such as an intraocular lens, are disclosed. In one method, the lens comprises a single polymer matrix containing crosslinkable pendant groups, wherein the polymer matrix increases in volume when crosslinked. The lens does not contain free monomer. Upon exposure to ultraviolet radiation, crosslinking causes the exposed portion of the lens to increase in volume, causing an increase in the refractive index. In another method, the lens comprises a polymer matrix containing photobleachable chromophores. Upon exposure to ultraviolet radiation, photobleaching causes a decrease in refractive index in the exposed portion without any change in lens thickness. These methods avoid the need to wait for diffusion to occur to change the lens shape and avoid the need for a second exposure to radiation to lock in the changes to the lens.
摘要:
Broadly, then, one aspect of the present invention is a functional optical material composed of a liquid crystal (LC) evidencing a pair of refractive indices (RI's) and a polymer in which the LC is dispersed. The refractive index (RI) of said polymer may be outside of the L C RI's by at least about 0.03. Another aspect of the present invention is a functional optical material composed of a liquid crystal (LC) and a polymer in which the LC is dispersed, wherein said LC is less than about 5% miscible in said polymer. A further aspect of the present invention is a functional optical material composed of a liquid crystal (LC) and a polymer in which the LC is dispersed, wherein the cladding contains not more than about 20wt% LC. In all of these embodiments, the functional optical material can be clad to an optical waveguide and can optionally contain a chromophore. In yet another aspect of the present invention, a functional optical waveguide is composed of a polymer having a refractive index, RIP and an optical waveguide clad having a refractive index, RIWG, wherein RIP is at least about 0.3% lower than RIWG under operating conditions of said clad optical waveguide.
摘要翻译:广义地说,本发明的一个方面是由表现出一对折射率(RI)的液晶(LC)和其中分散有LC的聚合物组成的功能光学材料。 所述聚合物的折射率(RI)可以在L C RI之外至少约0.03。 本发明的另一方面是由液晶(LC)和其中分散有LC的聚合物组成的功能性光学材料,其中所述聚合物中所述LC小于约5%。 本发明的另一方面是一种由液晶(LC)和其中分散有LC的聚合物组成的功能光学材料,其中包层含有不超过约20wt%的LC。 在所有这些实施例中,功能光学材料可以被包覆到光波导并且可以可选地包含发色团。 在本发明的另一方面,功能性光波导由具有折射率的聚合物RIP和包含折射率RIWG的光波导包层组成,其中RIP在工作条件下比RIWG低至少约0.3% 的所述包层光波导。