Polaroid Corporation

Other

Abcor, Inc.

Joseph DelPico

Richard G Egan

Russell A Gaudiana

Bennett H Rockney

Bruce K Johnson

Philip D Chapnik

Yves G Conturie

A system is provided in which an expanded non-collimated source of light may be used to produce a uniform polarized light exposure for use, for example, in the photo alignment of optical films. Uniformity of polarization and intensity may be maintained even when a high-intensity source of ultraviolet light is used. The system may be scaled in size to produce large exposures without sacrificing uniformity of intensity of uniformity of direction of polarization. The system includes a light source, a pile-of-plates polarizer, and a surface (such as the surface of an optical film) to be exposed. The pile-of-plates polarizer is oriented orthogonally to the surface, thereby providing a polarized light exposure having a uniform direction of polarization on the exposed surface. The light source may be oriented at Brewster's angle to the polarizer to improve polarization contrast.

Polarized exposure for web manufacture

A compact light weight printhead capable of direct quasi-contact printing includes an OLED structure disposed on a fiber optic faceplate substrate. The printhead is designed for contact or quasi-contact printing printing. The printhead design ensures that the desired pixel sharpness and reduced crosstalk is achieved. Two possible different arrangements for the printhead are disclosed. One arrangement includes at least one array of OLED elements. Each OLED array in this arrangement includes at least one triplet of OLED elements, and each element in each the triplet is capable of emitting radiation in a distinct wavelength range different from the distinct wavelength range of the other two color filters in the same triplet. In the second arrangement, the printhead includes at least one triplet of arrays of individually addressable Organic Light Emitting Diode (OLED) elements. In this second arrangement, each OLED array in each triplet has elements that are capable of emitting radiation in a distinct wavelength range different from the distinct wavelength range of the other two arrays in the triplet.

Integral organic light emitting diode fiber optic printhead

A compact light weight printhead capable of direct quasi-contact printing includes an OLED&mdash;Color Filter structure disposed on a fiber optic faceplate substrate. The OLED&mdash;Color Filter structure includes an OLED structure emitting over a broad range of wavelengths and color filter arrays that selectively transmit radiation in different distinct ranges of wavelengths. The printhead is designed for contact or quasi-contact printing printing. The printhead design ensures that the desired pixel sharpness and reduced crosstalk is achieved. Two possible different arrangements for the printhead are disclosed. One arrangement includes at least one array of OLED elements and at least one color filter array. Each color filter array in this arrangement includes at least one triplet of color filters, and each element in each the triplet is capable of transmitting radiation in a distinct wavelength range different from the distinct wavelength range of the other two color filters in the same triplet. In the second arrangement, the printhead includes at least one triplet of arrays of individually addressable Organic Light Emitting Diode (OLED) elements and at least one triplet of arrays of color filter elements, each OLED array in the triplet being in effective light transmission relation to the light receiving surface of one color filter array in the triplet thereby constituting an OLED&mdash;Color filter array set. In this second arrangement, each color filter array in each triplet has elements that are capable of transmitting radiation in a distinct wavelength range different from the distinct wavelength range of the other two arrays in the triplet.

Integral organic light emitting diode fiber optic printhead utilizing color filters

An optical system is disclosed wherein an illumination device is used to project colored light into a lens and focus through a spatial light modulator onto a photosensitive medium wherein the illumination device is configured so as to produce a uniform light distribution through the use of an aperture stop, a symmetrical placement of solid state light sources such as LEDs, or by LEDs fabricated such that the top surface emitting the colored light is not obstructed by an electrode or contacts connecting the light-emitting diode to a current source. Such a configuration is accomplished by providing a substantially transparent attachment layer that may include an opaque conductive material, but preferably includes transparent conductive particles that, in combination, attach and electrically connect the LED to a first electrode disposed upon a substrate. The light source is configured and spaced so as to allow incorporation of the light source into a print head, such that the print head can expose a photosensitive medium and focus down to produce a relatively uniform strip of light. The print head remains in relative motion with the photosensitive medium and allows for a delayed printing of some of the color information of each uniform strip of light. The spacing employed in the lighting device separating light-emitting diodes is as precisely defined so as to ensure overlay of each of the colors red, green and blue on each line of the photosensitive medium.

Optical system for transmitting a graphical image

In a process for the concentration of an aqueous polymeric latex, which latex comprises polymeric particles dispersed in an aqueous phase by a semipermeable membrane process, such as an ultrafiltration process and which latex is subject to destabilization, the improvement which comprises: adding to the latex a sufficient amount of a compatible surfactant to stabilize the latex and to maintain the dispersion of the polymeric particles in the aqueous phase of the latex during the concentration of the latex in a semipermeable membrane process.

Growing community of inventors

Brockton, MA, United States of America

Joseph DelPico