Abstract:
The invention relates to a specific method for determining a degree of saturation of a to be analyzed solution or suspension (12) of a substance dissolved in a solvent at a specific or specifiable temperature (T) and to a corresponding device therefor.
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:
The invention relates to an arrangement and method for microscopic optical recording of anisotropies in microscopically small objects, which affect the polarisation properties of light. The invention particularly relates to an arrangement comprising a beam path (106), running between a light source (102) and an optical sensor (104), whereby the object (108) is arranged in said beam path (106). An element for polarisation optical analysis and an element (116) which may be influenced by a controller (122) are further arranged in said beam path (106) which cause a controlled rotation of the light passing through the polarisation property with relation to a rotation angle. The controller (122) of the arrangement (100) comprises means by means of which at least three different rotation angles may be defined for recording of an image of the object (108) for each of the at least three rotational angles by means of the optical sensor (104). The arrangement (100) is so embodied such that the images of an isotropic region of the object (108) are essentially the same with relation to the rotation angle.
Abstract:
The present invention relates to an apparatus and a method for detecting an amount of depolarization of a linearly polarized beam transmitted by a birefringent medium in the direction of the optical axis thereof. The apparatus comprises a first beam splitter (7) for separating an non-axis portion (2) of said linearly polarized beam into the orthogonal components (3, 4), two photodetectors (8, 9) for detecting each components (3, 4), a second beam splitter (12) for separating an off-axis portion (11) of said linearly polarized beam into the orthogonal components (15, 16), wherein said second beam splitter (12) is disposed off-axis of the incident linearly polarized beam (1), a second set of photodetectors for detecting the components (15, 16) separated by said second beam splitter (12), and subtracting device (17) for subtracting the signals received by the second set of photodetectors (13, 14) from the respective signals received by the first tow photodetectors (8, 9).
Abstract:
L'invention concerne un système d'imagerie polarimétrique électronique pour appareil de colposcopie destiné à l'observation in vivo d'un col utérin, l'appareil de colposcopie comportant une source de lumière pour éclairage du col à observer et des moyens d'observation au moins visuels d'une image dudit col, le trajet optique de l'éclairage vers le col et le trajet optique de l'image en retour du col étant séparés l'un de l'autre sur au moins une partie de leurs trajets. Selon l'invention, le système comporte un boîtier adaptateur polarimétrique amovible dans la partie séparée des trajets optiques de l'éclairage et de l'image, ledit boîtier adaptateur polarimétrique comportant un générateur d'états de polarisation (PSG) sur le trajet optique de l'éclairage et un analyseur de polarisation (PSA) sur le trajet optique de l'image, le générateur d'états de polarisation (PSG) et l'analyseur de polarisation (PSA) étant commandés. Plusieurs niveaux de caractérisation polarimétrique sont possibles. Un boîtier adaptateur est revendiqué.
Abstract:
A polarimeter (20) simultaneously measures the Stokes vectors of a light beam (22) using an optics unit (24) with a slit (32) with a slit axis (34), a foreoptics (28) that focuses the light beam (22) from the point location through the slit (32), a collimator (38) that receives the light beam (22) from the slit (32) and collimates the light beam (22), a cylinder lens (42) that receives the light beam (22) from the collimator (38), wherein the cylinder lens (42) has a cylindrical axis (44) parallel to the slit axis (34), a re-imaging lens (48) that images the light beam (22) from the cylinder lens (42) onto a focal plane (50), and a set (54) of polarizing filters (56) including three polarization filters (58, 60, 62) having three different polarizations. The polarization filters (58, 60, 62) are adjacent to each other in a direction perpendicular to the slit axis (34) and lie between the cylinder lens (42) and the focal plane (50) so that the light beam (22) is directed onto the set (54) of polarizing filters (56).
Abstract:
To effectively reduce a measurement error in a parameter indicating a state of spectroscopic polarization generated by variations in retardation of a retarder (R 1 , R 2 ) due to a temperature change or other factors, while holding a variety of properties of a channeled spectroscopic polarimeter. By noting that reference phase functions φ 1 (σ) and φ 2 (σ) are obtained by solving an equation from each vibration component contained in a channeled spectrum P(σ), the reference phase functions φ 1 (σ) and φ 2 (σ) are calibrated concurrently with measurement of spectrometric Stokes parameters S 0 (σ), S 1 (σ), S 2 (σ) , and S 3 (σ).
Abstract:
Remotely sensing a target may include generating a first beam of optical radiation that is modulated at a first frequency and polarized at a first polarization. A second beam of optical radiation that is modulated at a second frequency and polarized at a second polarization may also be generated. The first and second beams of optical radiation may be transmitted to the target. Radiation at the first polarization and radiation at the second polarization may be detected from the target using a phase sensitive technique and the first and second frequencies.
Abstract:
The polarization of the lightwave at the input to a heterodyne receiver can be determined by measurements of the amplitude of electrical signals without the need for phase measurements. This allows more accurate measurements of the polarization in the presence of noise and allows a determination of the degree of polarization of the lightwave.