Abstract: Acid/base measuring sensor systems consisting of arrays of basic sensor cells are described which are constructed based on the chemical/electrical response characteristics of poly(aromatic amines). Protonation (doping) or deprotonation (de-doping) of the --N.dbd.sites in the polymers leads to characteristic conductivity vs. concentration curves which can be calibrated to produce reliable, instantaneous readings of the acid/base concentrations at various points in the working environment.

Abstract: This invention relates to compositions of miscible electrically conductive polyaniline and to conductive articles formed from such compositions. Specifically, the invention relates to polyaniline dioctylsulfosuccinate which is miscible with some common organic solvents. UV-Visible spectra of dilute solutions of this polymer show a linear dependence of absorbance on concentration. Solution with high concentrations of polymer, >50 w %, can be prepared and uniform films can be cast from these solutions without any loss in electrical conductivity. The solutions and films are stable.

Abstract: An optical shield which is transparent to ambient light but which blocks high intensity light such as that from a laser, with a response speed on the order of several picoseconds or less, to provide eye protection and to protect light sensors from laser beams. The shield is a multilayer structure with layers in which colloidal silica particles are dispersed in a transparent polymer binder having an index of refraction close to that of the silica particles under ambient light conditions. The application of multiple sealant layers of pure binder material results in improved transmittance of ambient light. High intensity light such as that from a laser causes third order nonlinear optical effects, particularly photorefractive effects, in the silica which change its effective index of refraction so that the mismatch between the effective index of refraction of the silica and the index of refraction of the binder causes scattering of the incident light.