Abstract:
A light engine has a light source front surface that emits non-collimated light. A collection lens collects the non-collimated light and provides incompletely collimated light. A collimating lens receives the incompletely collimated light and provides a collimated image. A non-orthogonal polarizing filter receives the collimated image and passes a polarized portion of the collimated image as a direct component of the polarized light engine image. The non-orthogonal polarizing filter reflects a recycled image back to the front surface. The non-orthogonal shape of the polarizing filter is selected according to the pattern of light on the light source front surface.
Abstract:
The present invention provides an optical filter comprising a crystalline polymer having a spherulite structure, particularly an optical filter comprising porous particles formed of a crystalline polymer in which single particles per se have a spherulite structure. This optical filter can convert linear polarized light to nonpolarized light close to natural light with high efficiency.
Abstract:
The invention relates to a triple prism which reflects light, a reflector and to a method for recognising an object. A reflective photoelectric barrier sends light to a reflector. The reflector does not answer with the form of the obtained light signal, but with a double signal which projects two light centres. The reflector can also be embodied such that it answers with a different geometric figure than the light projection. The reflector with a modified signal enables a sensor system to be produced and which can verify, by evaluating the light signal captured by the reflector, whether the captured signal of the reflector or another reflection.
Abstract:
This invention relates to a light redirecting article that redirects light toward a target angle, the light redirecting article having an input surface for accepting incident illumination over a first range of incident angles when in a first position and over a second range of incident angles when in a second position: the output surface having a number of light redirecting structures, each having a first exit surface sloping away from normal in one direction as defined by a first base angle β1, wherein the first exit surface redirects illumination with the light redirecting article in the first position, and a second exit surface sloping away from normal, in the opposite direction relative to the first exit surface, wherein the second exit surface redirects illumination with the light redirecting article in the second position and wherein first and second base angles β1 and β2 are unequal.
Abstract:
A thin polarizer array and a wavelength plate array that are composed of micro regions having different optical axis directions and wavelength characteristics and have a high extinction ratio and a low insertion loss, and a polarization analyzer using them are disclosed. An array of micro periodic grooves are formed on a substrate, with the directions changed from one region to another. An alternating multilayer film formed by alternating a layer of high refractive index material such as Si or Ta2O5 and a layer of low refractive index material such as SiO2 is formed by bias sputtering. By selecting a condition that each layer maintains its periodic projecting/recessed shape, an array of photonic crystal polarizer is formed. By mounting this array of photonic crystal polarizer in a photodetector array, a polarization analyzer that is small, has no movable part, is composed of a small number of components, and enables high-precision measurement is constituted.
Abstract translation:公开了由具有不同的光轴方向和波长特性并具有高消光比和低插入损耗的微区域构成的薄偏振器阵列和波长板阵列以及使用它们的偏振分析器。 在衬底上形成微型周期性沟槽阵列,其方向从一个区域变为另一个区域。 通过偏压溅射形成交替的多层膜,该交替的多层膜通过交替层叠诸如Si或Ta 2 O 5的高折射率材料和诸如SiO 2的低折射率材料层而形成。 通过选择每层保持其周期性投影/凹陷形状的条件,形成光子晶体偏振器阵列。 通过将这种光子晶体偏振器阵列安装在光电检测器阵列中,偏振分析器很小,没有可移动部分,由少量元件组成,并且能够实现高精度测量。
Abstract:
An illumination optical apparatus is able to well suppress a change in a polarization state of light in an optical path and to illuminate a surface to be illuminated, with light in a desired polarization state or in an unpolarized state. The illumination optical apparatus illuminates the surface to be illuminated (M), based on light with a polarization degree of not less than 0.9 supplied from a light source (1). The illumination optical apparatus comprises a polarization setter (4, 10) disposed in the optical path between the light source and the surface to be illuminated, and adapted for setting a polarization state of light reaching the surface to be illuminated, to a predetermined polarization state, and a holding member for supporting one optical surface of at least one optically transparent member incorporated in an optical system in the optical path between the light source and the surface to be illuminated, at three points located in three regions respectively.
Abstract:
The present application describes color management architecture for a three-panel projection system that utilizes color selective polarization filters (CSPF) and polarizing beam splitting elements (1104,1106,11089). An exemplary embodiment describes a color management architecture with a dichroic input beam splitter (1302) and three polarizing beam splitters (1104,1106,1108). An output polarizing beam splitter is used as an analyzer. The color management system architecture can isolate any color channel from those remaining whose separation and combination are then carried out by a single beamsplitting element. The disclosed embodiments also provide an improvement in the ANSI contrast. In some embodiments, an achromatic quarter-wave plate is used in combination with a color filter to block the light reflected from projection optics.
Abstract:
Polarization dependent effects in dynamical optical components based on polymer gel surface modulation and prism designs provides a loss in optical effects for light or information carriers using such components. The present invention provides a method and devices compensating such polarization effects.
Abstract:
An optical control system receives an incident light wave containing a plurality of wavelength components and is capable of giving different spatial light intensity distributions respectively to the wavelength components and of easily changing the color characteristic of an outgoing light wave. The optical control system is applied to illumination systems and light sources for displays, and to a method and an apparatus for process control using such modulated light. The optical control system receives a linearly polarized light wave as an incident light wave 1 containing a plurality of wavelength components, gives different polarization plane rotation angles respectively to the wavelength components by a wavelength dispersion azimuth rotator 3, gives the plane of polarization of the incident light wave 1 an optional optical rotation angle spatial distribution by a spatial light modulator 5, and emit an outgoing light wave containing wavelength components respectively having different spatial light intensity distributions by an analyzer 7.