Abstract:
Compound dichroic polarizers (CDPs) include multiple component dichroic polarizers based on different dichroic dyes and oriented to have different eigenpolarization directions. The component dichroic polarizers can be fixed to each other or to a substrate such as an eyeglass lens. Selection of eigenpolarization orientation and spectrum in a CDP permits color encoding of different SOPs.
Abstract:
A linear photopolymerizable polymer (LPP) layer is situated to align liquid crystal molecules in a cholesteric liquid crystal polymer (Ch-LCP) layer situated at or on the LPP layers. The Ch-LCP layer includes a patterned area and an unpatterned area. The patterned area and the un-patterned area have different optical properties. The Ch-LCP layer can be tuned to transmit light of a desired frequency and handedness. Single and multiple-layered LPP/Ch-LCP and/or LPP/LCP structures can be provided as patterned polarizers, patterned retarders and other devices.
Abstract:
Multispectral imaging systems are disclosed. An exemplary multispectral imager includes a narrow-band absorptive filter array and a sensor array comprising a plurality of pixels. The narrow-band absorptive filter array has a plurality of filter elements, each filter element being associated with a pixel of the sensor array. The filter elements are organized into groups of N filter elements, where N is greater than three. Each filter element absorbs one narrow band and transmits N−1 narrow bands. The group of N filter elements absorbs all N narrow bands.
Abstract:
Exemplary thin-film optical devices have first and second layer groups disposed as a layer stack on a substrate. The first layer group comprises a first PPN layer, a first LCP layer, and a first barrier layer all superposed. The second layer group is superposed relative to the first layer group, and includes a second PPN layer, a second LCP layer, and a second barrier layer all superposed. The first and second layer groups cooperate to polarize multiple wavelengths of an incident light flux in a broadband and/or wide-angle manner Each of the layer groups has an alignment layer, a respective liquid-crystal polymer layer, and a barrier layer.
Abstract:
Multispectral imaging systems are disclosed. An exemplary multispectral imager includes a narrow-band absorptive filter array and a sensor array comprising a plurality of pixels. The narrow-band absorptive filter array has a plurality of filter elements, each filter element being associated with a pixel of the sensor array. The filter elements are organized into groups of N filter elements, where N is greater than three. Each filter element absorbs one narrow band and transmits N−1 narrow bands. The group of N filter elements absorbs all N narrow bands.
Abstract:
Compound dichroic polarizers (CDPs) include multiple component dichroic polarizers based on different dichroic dyes and oriented to have different eigenpolarization directions. The component dichroic polarizers can be fixed to each other or to a substrate such as an eyeglass lens. Selection of eigenpolarization orientation and spectrum in a CDP permits color encoding of different SOPs.
Abstract:
Exemplary thin-film optical devices have first and second layer groups disposed as a layer stack on a substrate. The first layer group comprises a first PPN layer, a first LCP layer, and a first barrier layer all superposed. The second layer group is superposed relative to the first layer group, and includes a second PPN layer, a second LCP layer, and a second barrier layer all superposed. The first and second layer groups cooperate to polarize multiple wavelengths of an incident light flux in a broadband and/or wide-angle manner Each of the layer groups has an alignment layer, a respective liquid-crystal polymer layer, and a barrier layer.
Abstract:
Exemplary thin-film optical devices have first and second layer groups disposed as a layer stack on a substrate. The first layer group comprises a first PPN layer, a first LCP layer, and a first barrier layer all superposed. The second layer group is superposed relative to the first layer group, and includes a second PPN layer, a second LCP layer, and a second barrier layer all superposed. The first and second layer groups cooperate to polarize multiple wavelengths of an incident light flux in a broadband and/or wide-angle manner. Each of the layer groups has an alignment layer, a respective liquid-crystal polymer layer, and a barrier layer.
Abstract:
Exemplary thin-film optical devices have first and second layer groups disposed as a layer stack on a substrate. The first layer group comprises a first PPN layer, a first LCP layer, and a first barrier layer all superposed. The second layer group is superposed relative to the first layer group, and includes a second PPN layer, a second LCP layer, and a second barrier layer all superposed. The first and second layer groups cooperate to polarize multiple wavelengths of an incident light flux in a broadband and/or wide-angle manner. Each of the layer groups has an alignment layer, a respective liquid-crystal polymer layer, and a barrier layer.