42 results about "Interferome" patented technology

Preferred embodiments of the present invention are directed to systems for phase measurement which address the problem of phase noise using combinations of a number of strategies including, but not limited to, common-path interferometry, phase referencing, active stabilization and differential measurement. Embodiment are directed to optical devices for imaging small biological objects with light. These embodiments can be applied to the fields of, for example, cellular physiology and neuroscience. These preferred embodiments are based on principles of phase measurements and imaging technologies. The scientific motivation for using phase measurements and imaging technologies is derived from, for example, cellular biology at the sub-micron level which can include, without limitation, imaging origins of dysplasia, cellular communication, neuronal transmission and implementation of the genetic code. The structure and dynamics of sub-cellular constituents cannot be currently studied in their native state using the existing methods and technologies including, for example, x-ray and neutron scattering. In contrast, light based techniques with nanometer resolution enable the cellular machinery to be studied in its native state. Thus, preferred embodiments of the present invention include systems based on principles of interferometry and/or phase measurements and are used to study cellular physiology. These systems include principles of low coherence interferometry (LCI) using optical interferometers to measure phase, or light scattering spectroscopy (LSS) wherein interference within the cellular components themselves is used, or in the alternative the principles of LCI and LSS can be combined to result in systems of the present invention.

The invention discloses an interferometric method based on spectrum analysis of a fringe image. A single carrier frequency loaded interference fringe image, generated by an interferometer, of a to-be-measured component is obtained; prolongation and edge smoothing are carried out on the fringe image, and FFT (fast Fourier transform) is carried out on the prolonged fringe image to obtain a frequencyspectrum of the image. Aimed at the frequency spectrum, a 2D interpolation FFT algorithm is used to estimate a position of a spectral sidelobe peak value, and the image carrier frequency is removed according to an estimation result. Phase information of a wave surface to be measured is obtained by calculated, and the surface shape of the to-be-measured component is estimated. According to the method of the invention, the fringe image is analyzed and processed on the basis of improved fringe image prolongation and fringe carrier wave estimation methods, and the interferometric precision is higher.

The invention discloses a signal processing method for a heterodyne interferometer. The method comprises the following steps of: providing a Span3-series XC3S1500 chip for an FPGA (Field Programmable Gate Array), chopping a reference signal and a measurement signal through a high-frequency small-power Schottky diode respectively to obtain positive half period signals and connecting with a pin of the FPGA; countering two paths of signals respectively at the counting period of 100 mum s and latching every 100 mum s, wherein the phase difference of the entire period is N1-N2; setting a count value of an initial phase difference in a first sampling counting period as n1 and latching by taking a reference signal as a standard, setting a count value of a tail end phase difference as n2, and setting a count value of a non-period phase different as n2-n1; setting a count value of an ith non-period phase difference as ni+1-n1; performing pulse filling counting on one period of the reference signal to obtain a count value NTr of the reference signal in the entire period; setting the phase difference in the sampling period as (N1-N2)+(ni+1-n1)/NTr; and obtaining measured displacement: L=lambda/2[(N1-N2)+(ni+1-n1)/NTr], wherein lambda is a laser wavelength, (i=1,2,---,n). According to the method, dynamic and real-time measurement of phases can be realized, a high resolution is achieved.

A sensor device which is adapted for detecting target molecules having a target nucleic acid sequence located in nano/micro channels, comprises a THz source for exciting the target molecules and a heterodyne interferometer, having a detection frequency MHz, for probing the excited molecules. The nano-channel array in the sample holder is functionalized with electric field to linearize the target alleles and genes. The linearized molecules are exposed to THz field whereby the different vibrational modes of base pairs are resonantly excited. The excitation of base-breathing mode and base-shifting mode leads to differential induced dipole moments along and perpendicular to the double helix axis. This induced asymmetry in polarizability leads to optical anisotropy. The dipole-dipole interaction between adjacent bases affects polarizability along the helix axis and hence the intrinsic molecular anisotropy is a function of number of base pairs in the strand. The resulting birefringence can be measured using the heterodyne interferometer as a function of changes in the number of base pairs in the strand. Furthermore, a sensing method for detecting birefringence in terms of phase shift of the MHz signal, as a function of target molecule size, is described.

The invention discloses an anisotropic super-hydrophobic surface design method of a common nepenthes-imitated sliding area. A scanning electron microscope and a three-dimensional white light morphology interferometer are used for carrying out micro-morphology observation on the common nepenthes sliding area and obtaining micro-morphology structure characteristic parameters; establishing an anisotropic super-hydrophobic surface bionic model imitating a common nepenthes slippage region according to the extracted micro-topography structure characteristic parameters; based on a Cassie-Baxter model, calculating a numerical relationship between anisotropic super-hydrophobic surface micro-topography structure characteristic parameters of a common nepenthes-imitating sliding region and a super-hydrophobic function; according to the derived numerical relationship, the super-hydrophobic effect of the anisotropic super-hydrophobic surface imitating the common nepenthes slippage region is regulated and controlled by regulating and controlling the characteristic parameters of the micro-morphology structure. According to the design method, controllable design of the super-hydrophobic effect canbe achieved, the super-hydrophobic effect of the designed super-hydrophobic surface can be regulated and controlled, and the design method further has the characteristics of anisotropy of the super-hydrophobic effect and the like.

A method for studying cell viability and protein aggregation involves establishing a Fabry Perot etalon signal within an optical spectroscopic feature, e.g., in the near infrared region. Protein aggregation and cell viability can be reflected by changes observed in the magnitude of the Fourier Transform peaks observed in the frequency or space domain associated with the contrast of the etalon. In short, the presence of viable cells and protein aggregates can degrade the etalon contrast of an etalon window. In some cases, the concentration of cells and monomeric protein can be measured as well.

A bilateral Fizeau interferometer detection device comprises a light source module, a first interferometer host, a second interferometer host, a first standard lens, a second standard lens and a detected non-transparent plane. The first interferometer host and the second interferometer host are both Fizeau interferometers. The point light source is located on the focal plane of the collimating mirror but not on the focal point, so that an included angle is formed between the emergent light transmitted by the collimating mirror and the optical axis of the interferometer, and through cooperation with the diaphragm, the emergent light of the interferometer at the opposite side enters the interferometer at the local side and then converges at the shading area of the diaphragm, and the receiving of an interferogram of the interferometer at the local side is not influenced; or the optical switch is used for enabling the first interferometer host and the second interferometer host to work independently. The device effectively improves the quality of an interference pattern, and has the advantages of simple structure, convenience in operation and high measurement precision.

The invention relates to a unit element beam splitting and combining interferometer which comprises an element, a light beam enters the element and then is split into two beams of light, namely a first beam of light and a second beam of light, the first beam of light and the second beam of light are respectively reflected for even times and odd times in the element, and the two beams of light arecombined again in the element after being reflected and finally emitted from the element. The problems that an existing interferometer is composed of multiple elements, quite complex, insufficient instability and the like are solved, beam splitting and beam combining can be achieved in the element at the same time through different reflection times and parity, and the interferometer has the advantages of being compact, stable, high in integration degree, high in efficiency, resistant to high power and the like. The interferometer can replace a traditional interferometer composed of multiple elements in many application scenes, for example, but not limited to vector light field generation, vortex beam topological charge measurement, quantum optical logic gates and the like, and has wide potential application.

The invention discloses an interferometer zero path difference online debugging mechanism for a VISAR system. The objective of the invention is to solve the technical problems of great increase of theoperation complexity of an experimenter, reduction of the experiment efficiency and uncertainty of an experiment result due to judgment of whether an interferometer is in a zero path difference stateor not and a reset process after offline calibration in the prior art. A light source unit, a reflection unit, an adjustment unit and a feedback unit are integrated in the VISAR system; the online debugging of the zero path difference state of the interferometer is realized; the interferometer does not need to be moved out for off-line debugging, the automation level is high, the experiment operation is simplified, and the experiment efficiency is improved; and the zero path difference state of the interferometer can be detected on line, so that the uncertainty of an experimental result is avoided.

The invention relates to an interferometer angle calculation method based on a neural network algorithm, and the method comprises the steps: fitting an interferometer angle measurement equation curvethrough a multilayer neural network, and calculating the arrival angle of an incoming wave signal according to the input frequency and phase information. The method can achieve the independent training of a single interferometer, saves the correction process of the interferometer, and can improve the angle measurement precision. The method has the characteristic of being insensitive to the interferometer arraying mode, and can adapt to various different interferometer arraying modes through the same training mode. Meanwhile, the method is not sensitive to the angle range of the incoming wave signal, and can be used for fitting a nonlinear curve under a large-angle condition so that the angle measurement range of the interferometer can be expanded.

The invention discloses a control method for an integrated interferometer device, which is characterized in that it includes: step 1, setting at least two interferometers in the first direction; step 2, setting the control weight of each interferometer, wherein the control weight distribution As follows: when the workpiece table or mask table moves to the control area of ​​each interferometer, the weight factor is equal to 1; when the workpiece table or mask table moves to the non-control area, the weight factor is equal to 0; when the workpiece table or mask table moves Move to the common control area of ​​the two interferometers, and its weight factor is a multi-order function; step 3, judge whether any interferometer loses light, and if the judgment result is true, dynamically reset the lost interferometer to zero.

The invention discloses an automatic adjustment method of a computer-aided interferometer based on deep learning. The method comprises steps of collecting an interferogram and three-dimensional coordinates thereof as training data; classifying the expanded training data based on a K-means clustering algorithm to obtain a data set; dividing the data set into a training set and a verification set byadopting a k-fold cross validation method, and training the VGG-16 network model by utilizing the training set and the verification set obtained by each fold; and inputting an interferogram acquiredin real time into the trained VGG-16 network model to obtain the misalignment amount of the interferometer. According to the method, the specific interference pattern deviation value does not need tobe solved; trained network classification data are fully utilized, the coordinates of the position where the interferometer is located are determined by classifying interferograms formed by the interferometer, then the mirror to be measured is controlled to move to the accurate position, the advantages of the deep convolutional network are brought into full play, and the method has the advantagesof being good in robustness and high in accuracy.

The present invention relates to an interferometer device (10), comprising: an interferometer unit (1), which has a base substrate (2), a Fabry-Perot unit (FPI) and a detector device (3); and a housing (G), which comprises a bottom plate (BP) and a cover structure (4), wherein: the cover structure (4) is arranged on the bottom plate (BP) and encloses a second cavity (K2) between the cover structure (4) and the bottom plate (BP); the bottom plate (BP) or the cover structure (4) comprises an opening (5), which is surrounded by side walls (5a), which extend perpendicularly to a surface of the bottom plate (BP) or the cover structure (4); and the interferometer unit (1) is arranged in the second cavity (K2) and in a light incidence direction (L) through the opening (5) such that the Fabry-Perot unit (FPI) of the interferometer unit (1) faces the opening (5).