Abstract: Optical modulators and methods of modulating light include introducing light to an optical wave guide from a light source. The wave guide is formed of an elastomer film which is deformable by a mechanical or electrostatic force acting to change the cross section of the film and thereby modulate the light passing through the wave guide.

Abstract: Amplification of optical signals propagating through a first waveguide is achieved by modulation of high intensity light propagating through an elastomeric waveguide responsive to said signals, the modulation of the high intensity light being accomplished by an apparatus including a photodiode for registering the modulation of the optical signals and an electrode arrangement for causing corresponding light-modulating deformation of the elastomeric waveguide, the circuitry between photodiode and the electrode arrangement including a resistor and a D.C. power source.

Abstract: A xeroprinting master capable of preparation of multiple copies of an original without reimaging and without permanent modification of the master itself. This xeroprinting master consists essentially of a conductive base member, a non-persistent photoconductive insulating layer, a persistent photoconductive insulating layer and a dielectric layer; these layers being arranged relative to one another in the order of their listing. A latent electrostatic image can be created upon the surface of the dielectric layer by initially exposing the persistent photoconductive insulating layer to an image pattern, sensitizing the surface of the dielectric layer in the dark by charging to a constant surface potential, followed by blanket exposure of the non-persistent photoconductive insulating layer; the wavelength of light used in blanket exposure of the non-persistent photoconductive insulating layer being substantially non-activating of the persistent photoconductive insulating layer.

Abstract: Electrostatographic imaging method employing an imaging member provided with a photoconductive imaging layer containing an organic photoconductive material, an activator capable of forming a charge transfer complex with said material and a protonic acid sensitizer. The acid sensitization of the charge transfer complex in this imaging layer dramatically enhances the photosensitivity of this photoconductive composition and yet avoids the undesirable memory effects generally experienced in such materials when a photoconductive layer of these materials is imaged in accord with the method of this invention.