Hoechst Celanese Corporation

Asahi Glass Company, Limited

Photon-x, Inc.

Micro-optice, Inc.

Hoecst Celanese Corp.

Chia-Chi Teng

Suk Youn Suh

George Malinoski

Hyun Nam Yoon

Hyun-Nam Yoon

Dagobert E Stuetz

Sunny S Shen

Mohammad A Mortazavi

Robert Andrew Norwood

James B Stamatoff

Alan Buckley

Anthony F Garito

Jan W Kokkelink

Talal K Findakly

David R Haas

A bandpass filter containing specific combinations of the dyes to yield filters which are adapted to selectively transmit predetermined primary color wavelengths of an electromagnetic spectrum as well as selectively absorb wavelengths other than the predetermined primary color wavelengths. The multiple bandpass filters are employed to improve the images on CRT screens and plasma display panels.

Dye combinations for multiple bandpass filters for video displays

A bandpass filter containing specific red dyes alone or in combination with other dyes selectively transmits predetermined primary color wavelengths as well as selectively absorbs wavelengths other than the predetermined primary color wavelength. The filter is particularly useful for enhancing the contrast of color plasma displays by absorbing visible light emitted at 590 nm from the display.

Dye combinations for image enhancement filters for color video displays

An optical waveguide comprising a first polymeric layer and a second polymeric layer adjacent to the first polymeric layer and a method for making the optical waveguide are disclosed. The first polymeric layer has a refractive index of n and solubility S in a first solvent. The second polymeric layer has a refractive index of n and solubility S in the first solvent. In the optical waveguide, n &ne;n and S /S is at least 5.

Thin film optical waveguides

An inline fiber optic polarization combiner/divider is proposed for use in fiber optic communications. It utilizes a polarizing beam splitting cube (PBSC) or a birefringent displacer located between a pair of collimating lenses. A reflecting film (either external or directly applied to one of the faces of the PBSC or birefringent displacer) is used to completely reflect one of the two polarizations and is positioned such that the optical path length between the lens and the reflecting film is equal to one focal length in order to accomplish an optical path where the input and output optical fibers are in-line with the package.

In-line fiber optic polarization combiner/divider

Disclosed in this invention is an optical filter to enhance the contrast and brightness of images from a color display. The filter comprises suitable dyes and a polymer matrix, applied in a suitable form on the display unit. Such filters have utility in devices based on CRTs, plasmas and the like.

Spectrally tuned multiple bandpass filters for video displays

This invention discloses novel liquid crystal display devices containing polarizers which comprise a liquid crystal polymer and a dichroic absorber. Also disclosed is a process to construct the liquid crystal display devices.

Liquid crystal display devices incorporating polarizers comprising

This invention provides novel liquid crystalline polymers which, when blended with a suitable dye at a suitable high temperature and extruded, yields polarizer films with superior thermal and hygroscopic stability and polarizing efficiency. The invention further provides a process to prepare such polarizer films.

Polarizer films with high thermal and hygroscopic stability

This invention provides laminates useful for display device applications. An illustrative laminate comprises a polarizing film, and a protective layer, bonded by means of an intermediary adhesive layer. A polarizing film useful for such a laminate construction comprises a liquid crystalline polyester and a dichroic dye. The invention further provides a process to prepare such laminates.

Laminates of liquid crystalline polymeric films for polarizer

This invention provides all organic high extinction polarizers based on blends of novel liquid crystalline polymers and suitable dichroic dyes. The invention further provides a process to prepare such polarizer films.

High extinction polarizer films comprising liquid crystal polymeric

This invention provides process embodiments for fabricating polymeric channel or rib optical waveguides. An invention optical waveguide has a channel or rib structure which has a polymer thin film smooth-wall lining on its surfaces to minimize optical loss by scattering of propagating wave energy. The smooth-wall channel waveguide polymeric medium is in combination with polymeric cladding thin films to form a laminated matrix. The polymers in the waveguiding medium and the lining and cladding thin films of the laminated matrix preferably have side chains which exhibit second order nonlinear optical susceptibility, and which can be molecularly oriented by an electric field.

Smooth-wall polymeric channel and rib waveguides exhibiting low optical

This invention provides a thin film waveguide electrooptic intensity modulation device. The thin film waveguide is an isotropic organic medium which exhibits nonlinear optical response. The device is adapted to modulate waveguided radiation by refractive index change commensurate with change in an applied electric field.

Growing community of inventors

Piscataway, NJ, United States of America

Chia-Chi Teng