Abstract:
An intensity-independent optical computing device and method for performing multivariate optical computing based on changes in polarization of the reflected and/or transmitted electromagnetic radiation to thereby determine sample characteristics.
Abstract:
Un dispositif d'analyse et/ou de génération d'un état de polarisation d'un point de mesure d'un objet cible, le dispositif comprend : - un polariseur propre à sélectionner, dans une onde lumineuse incidente, un faisceau lumineux polarisé rectilignement selon une direction prédéfinie, - un premier élément biréfringent propre à être traversé par ledit faisceau lumineux, - un deuxième élément biréfringent identique au premier élément et propre à être traversé par ledit faisceau lumineux, ledit faisceau lumineux étant alors destiné à être dirigé directement ou indirectement vers ledit objet pour être réfléchi sous la forme d'un faisceau réfléchi. En outre, l'ensemble optique, constitué d'un ou plusieurs éléments optiques, est situé sur un trajet optique compris entre le premier élément et le deuxième élément, l'ensemble optique étant constitué de : - un nombre impair de miroirs, ou, - un nombre impair de lames demi-onde, ou, - un nombre confondu impair de miroirs ou lames demi-onde.
Abstract:
Provided herein is an apparatus, including an optical characterization device; a photon detector array configured to sequentially receive a first set of photons scattered from surface features of an article and a second set of photons scattered from surface features of the article and subsequently processed by the optical characterization device; and a chemical characterization means for chemically characterizing the surface features of the article, wherein the chemical characterization means is configured for processing the first set of photons received by the photon detector array and the second set of photons received by the photon detector array.
Abstract:
Provided herein is an apparatus, including a photon emitter configured to emit photons onto a surface of an article, a photon detector array configured to receive photons from surface features of the article; and a processing means configured for processing photon-detector-array signals corresponding to photons scattered from the surface features and photons fluoresced from the surface features, wherein the processing means is further configured for classifying the surface features of the article.
Abstract:
The present invention has a problem aiming to provide a birefringence measurement device capable of measuring a two-dimensional distribution of birefringence in a measurement target in real time and in detail using a simple configuration without a rotating mechanism. A birefringence measurement device 1A according to the present invention includes light flux generating means 2 for generating light flux L1, light flux irradiating means 3, 4, or 5 for irradiating a measurement target 20 with the light flux L1 in a predetermined polarization state, an imaging optical system 10 for forming an image from light flux L4 transmitted through the measurement target 20, a polarization/diffraction grating 8 disposed in a position within the imaging optical system 10, image pickup means 12 for generating a light-dark signal related to brightness of the image formed by the imaging optical system 10, and output means for outputting information regarding a phase difference for the light flux L4, the phase difference resulting from the transmission through the measurement target 20 and being determined on the basis of the light-dark signal, and the image pickup means 12 generates the light-dark signal for an image based on at least one beam of diffracted light L7 from among a plurality of beams of diffracted light produced by the polarization/diffraction grating 8.
Abstract:
Polarization-sensitive optical image measurement is subject to a non-negligible bias, and consequent deviation in birefringence, in a surrounding range of low SN ratios (signal-to-noise ratios) and low signal strengths; however, this deviation in birefringence is removed to make accurate quantitative measurement possible. Noise-containing OCT signals obtained by polarization OCT are processed using a birefringence calculation algorithm, to obtain measured birefringence, after which noise is statistically adjusted to simulate a measured birefringence distribution and determine the noise characteristics of the measured birefringence values, and then Monte Carlo calculations are repeated by assuming different values for the noise level and the true birefringence value, respectively, to form three-dimensional histogram of combinations of true birefringence values, SN ratios, and measured birefringence values, after which specified measured birefringence values and SN ratios are assumed from the three-dimensional histogram information to obtain a true birefringence probability density distribution, and true birefringence values are estimated from the true birefringence probability density distribution.
Abstract:
Methods, devices, and systems are disclosed for determining protein structure and dynamics using second harmonic generation (SHG) and related surface-selective nonlinear optical techniques.
Abstract:
There is set forth herein in one embodiment, a structure including a metallic grating having a grating pattern, the metallic grating including a critical dimension. The metallic grating can output a spectral profile when exposed to electromagnetic radiation, the spectral profile having a feature. The grating pattern can be configured so that a change of the critical dimension produces a shift in a value of the feature of the spectral profile. A method can include propagating input electromagnetic radiation onto a metallic grating having a two dimensional periodic grating pattern and measuring a critical dimension of the metallic grating using output electromagnetic radiation from the metallic grating.
Abstract:
The present invention has a problem aiming to provide a birefringence measurement device capable of measuring a two-dimensional distribution of birefringence in a measurement target in real time and in detail using a simple configuration without a rotating mechanism. A birefringence measurement device 1A according to the present invention includes light flux generating means 2 for generating light flux L1, light flux irradiating means 3, 4, or 5 for irradiating a measurement target 20 with the light flux L1 in a predetermined polarization state, an imaging optical system 10 for forming an image from light flux L4 transmitted through the measurement target 20, a polarization/diffraction grating 8 disposed in a position within the imaging optical system 10, image pickup means 12 for generating a light-dark signal related to brightness of the image formed by the imaging optical system 10, and output means for outputting information regarding a phase difference for the light flux L4, the phase difference resulting from the transmission through the measurement target 20 and being determined on the basis of the light-dark signal, and the image pickup means 12 generates the light-dark signal for an image based on at least one beam of diffracted light L7 from among a plurality of beams of diffracted light produced by the polarization/diffraction grating 8.