摘要:
A fully integrated electro-optic page-scanner comprises an optically transparent waveguide made from an electro-optic polymer, and an electrode structure including a linear array of electrically-addressable, spaced, parallel electrodes for selectively altering the refractive index across pixel-sized portions of the polymeric waveguide. According to the invention, the addressable electrodes are disposed on a photoconductive substrate which facilitates poling of the polymer waveguide to rander it electro-optic in nature. During the poling process, the photoconductive substrate is made electrically conductive by flood illumination, while a uniform electric field is established between the substrate and a transparent electrode which overlies the waveguide layer, opposite the addressable electrodes. Preferably, the photoconductive substrate comprises undoped silicon which enables certain electrode-addressing circuitry to be integrated within the scanner structure.
摘要:
An optical article is disclosed containing, for the transmission of electromagnetic radiation, a medium exhibiting a second order polarization susceptibility greater than 10.sup.-9 electrostatic units comprised of a linear polymer containing polar aligned noncentrosymmetric molecular dipoles having an electron donor moiety linked through a conjugated .pi. bonding system to an electron acceptor moiety to permit oscillation of the molecular dipole between a ground state exhibiting a first dipole moment and an excited state exhibiting a differing dipole moment. The linear polymer is a condensation polymer including in its backbone a plurality of molecular dipoles including sulfonyl electron acceptor moieties sequentially arranged to reinforce electron displacement along the polymer backbone.
摘要:
Photoconductive compositions comprising an insulating polymeric matrix and a compound of the formula ##STR1## wherein R is --H or --CN;R', r", r'" and R.sup.iv are independently selected from an aliphatic hydrocarbon radical having from about 1 - 10 carbon atoms; phenyl; or substituted phenyl wherein said substituents are capable of releasing electrons to relatively electron deficient centers within the compound; amino; diarylamino; dialkylamino or alkoxy; n can range from 0 up to the potential number of positions of substitution on the aromatic ring system. These compositions have good spectral response in the visible region of the electromagnetic spectrum and are suitable for use in electrostatographic imaging members and methods.
摘要:
Ambipolar photoconductive composition comprising the product of the in situ polymerization of at least one cyclic compound of the formula: ##EQU1## wherein Ar is a polyaromatic nucleus selected from the group consisting of diradicals of naphthalene, anthracene, pyrene and carbazole;X and Y are independently selected from the group consisting of halogen, NO.sub.2, NH.sub.2 ; lower alkyl, phenyl, phenoxy, lower alkoxy, carboxy, hydroxyl, lower alkyl esters and aryl esters;m and n can range from 0 to the total number of replaceable hydrogens on the polyaromatic nucleus;In a polymeric host resin.By the appropriate in situ polymerization of the above compound in the host polymer, it is possible to produce an interpretating photoconductive netword throughout the host polymer. The resulting photoconductive materials can be incorporated into an imaging member in an electrostatographic imaging system and function in either a positive or negative charging mode.
摘要:
Various uses of fluorinated alkenes, particularly HFO-1234 and HFCO-1233zd in a variety of applications, including refrigeration, foams, blowing agents, aerosols, propellants, solvent compositions, fire extinguishing and suppressing agents, extraction agents and catalyst deposition are disclosed.
摘要:
An azeotrope-like mixture consisting essentially of chlorotrifluoropropene and at least one component selected from the group consisting of a C1-C3 alcohol, a C5-C6 hydrocarbon, a halogenated hydrocarbon, methylal, methyl acetone, water, nitromethane, and combinations thereof.
摘要:
The present invention relates to building envelopes and methods of forming a building envelope comprising foams having a polymeric foam structure including a plurality of closed cells therein and trans-1-chloro-3,3,3-trifluoropropene (1233zd(E)) contained in at least a portion of said cells.
摘要:
A composition including an effective amount of trans-1,3,3,3-tetrafluoropropene component combined with an effective amount of an alcohol selected from the group of methanol, ethanol, propanol, isopropanol, tert-butanol, isobutanol, 2-ethyl hexanol and any combination thereof, where the composition has azeotropic properties.
摘要:
A self-illuminating solid-state color image capture device, includes: an array of light emitting elements and light sensing elements formed on a common substrate; the light emitting elements including first color elements adapted to emit light of a first color and second color elements adapted to emit light of a second color, and the light sensing elements being responsive to all emitted colors; and electronics coupled to the light emitting and light sensing elements for sequentially causing the first and second color elements to emit light and sensing the light reflected from a scene being captured with the light sensing elements.
摘要:
Disclosed are azeotrope-like compositions comprising 1,1,1,3,3-pentafluoropropane and at least one C3 or C4 hydrocarbon, and optionally water, said compositions are environmentally desirable for use as refrigerants, aerosol propellants, metered dose inhalers, blowing agents for polymer foam, heat transfer media, and gaseous dielectrics.