11 results about "Transmittance spectra" patented technology

The invention relates to an ophthalmic article (1), in particular for sunglasses, comprising at least one substrate (9) and a photochromic filter compound (15), the ophthalmic article (1) having a first transmission spectrum in an activated state of the photochromic filter compound (15) and a second transmission spectrum in a deactivated state of the photochromic filter compound, such that: ⋅—the first and the second transmission spectra at wavelengths lower than 380 nm is lower than 1%, ⋅—the first and the second transmission spectra have a relative first maximum between 460 nm and 510 nm, ⋅—the first and the second transmission spectrum have a relative first minimum between 560 nm and 610 nm, and where ⋅—Tvactivated is the luminous transmittance according to ISO_13666 in the activated state of the photochromic filter compound. ⋅—Tvdeactivated is the luminous transmittance according to ISO_13666 in the deactivated state of the photochromic filter compound. ⋅The lens has a reduced transmission in the blue between 400 and 450 nm and a reduced transmission around 585 nm. The lens provides a good contrast and reduces glare.TvdeactivatedTvactivated>2.5TvactivatedTνdeactivated

The present application relates to the technical field of perovskite photoelectric devices and flat plate optical waveguide, and particularly relates to a method for monitoring the quality and uniformity of perovskite thin film. The method comprises: providing a device to be measured comprising at least a glass substrate and a perovskite layer; coupling light from a wide-spectrum light source into the glass substrate through a multimode optical fiber to excite a loss mode resonance (LMR) effect; collecting a transmission spectrum after a polarizer through a spectrometer; extracting the peak position, intensity and half-peak width of the LMR characteristic peak. The red shift of the peak position indicates thickness change, the intensity decay and the half-peak width broadening indicate quality decline. Multi-point scanning can evaluate uniformity. The present application does not require vacuum equipment, is non-destructive, fast, low-cost, can be integrated into the production line, and solves the problem that the existing detection method cannot meet the needs of large-scale production.

This invention relates to the field of thin film preparation, and discloses a method and system for preparing dimming films based on PET and liquid crystal. The method includes: first, acquiring the transmittance parameters of the PET substrate and the phase transition temperature data of the liquid crystal material; constructing an interlayer framework; forming an activated interface layer on the surface of the PET-liquid crystal composite through plasma treatment; coating a liquid crystal dispersion to obtain a pre-cured film; gradient curing based on its thickness distribution data using an ultraviolet light source to form a dimming functional layer; collecting the transmission spectrum curves of the dimming functional layer under different electric field intensities; calculating the duty cycle value of the liquid crystal molecules; configuring a transparent conductive electrode pattern accordingly; and topologically designing it as a uniquely controlled electrode array. Defect clusters are identified and repaired by calculating the electronic control adjustment value; the dimming attenuation parameters of the repaired film are analyzed; and finally, a PET-liquid crystal composite thin film preparation scheme is formulated. This invention can improve the preparation efficiency of dimming films.

An efficient computational method for cross-scale optical modeling of micro / nano-structured solar cells is presented, belonging to the field of solar cell design and simulation technology. This method decomposes a cross-scale solar cell containing a micro / nano pyramid structure into a top micro / nano structure layer and a middle and bottom multi-layer planar structure, respectively simulated using the finite element method (FEM) and transmission matrix theory (TMT): FEM accurately calculates the polarized light transmission and reflection coefficients of the top micro / nano structure, considering multi-order diffraction effects; TMT efficiently calculates the polarized light transmission characteristics of the middle and bottom multi-layer planar structure; and finally, the total absorption, reflection, and transmission spectra and photocurrent of the cell are integrated through coupled formulas. This invention solves the problem of balancing accuracy and efficiency in cross-scale structure modeling using traditional single simulation methods, achieving a computational speed more than 50 times faster than traditional full FEM simulation with an error of less than 5%.

Optical modulation method including providing at least one optical device configured for modulating at least one optical electromagnetic wave provided to and transmitted through the at least one optical device, providing the at least one optical signal electromagnetic wave from at least one first light source to the at least one optical device, the at least one optical signal electromagnetic wave having at least one operation wavelength to be modulated by the at least one optical device; providing a photo-excitation electromagnetic wave from the at least one first light source or from at least one second optical source to the at least one optical device at a pump light intensity to displace in wavelength the resonance wavelengths and the resonance dips in the transmission spectrum to optically modulate the transmitted intensity of the at least one optical signal electromagnetic wave at the at least one operation wavelength.

The present application provides a kind of based on off-axis integrated cavity output spectrum (OA-ICOS) transmission spectrum signal atmospheric methane concentration retrieval method.For the integral absorbance concentration retrieval method transmission spectrum signal is susceptible to baseline drift and noise interference and other factors, lead to integral area calculation error is larger, concentration retrieval precision low problem, the present application proposes a kind of based on transmission spectrum methane concentration retrieval method, by modeling and optimization to transmission spectrum signal, realize the high-precision retrieval of methane concentration.First, the integral absorption area of transmission spectrum is mathematically deduced, and the equivalent expression of integral area is obtained;On this basis, combined with initialization baseline and fitting integral area, construct transmission light intensity model.Subsequently, the Levenberg-Marquardt (L-M) nonlinear least squares optimization algorithm is used to iteratively optimize the parameters in the transmission light intensity model, to obtain the optimal solution of the fitting integral area, and further establish a polynomial prediction model between methane concentration and integral absorption area, realize the inversion calculation of methane concentration.Experimental results show that the method provided by the present application can effectively reduce the influence of baseline drift on integral area calculation, improve the accuracy of methane concentration retrieval, and is suitable for deep-sea gas exploration, park environmental gas monitoring and other application scenarios.

The present invention relates to the art of spectral detection and discloses a spectral filter and spectrometer based on a multi-stage resonant chamber structure, which is arranged in a computational spectrometer when in use and has at least one optical path, wherein at least n+1 linearly arranged mirrors are provided in one optical path, n∈N and n≧2, and the mirrors have a reflectance of 5% to 50%. Resonant chambers are formed between two adjacent mirrors, and the linearly arranged n+1 mirrors constitute n stages of resonant chambers, the chamber length of each resonant chamber being 20μm to 2000μm, and the chamber lengths of at least two resonant chambers are different or the reflectances of at least two mirrors are different so that the n stages of resonant chambers can generate random transmission spectra in the frequency domain.

The application discloses an alternating current driven limited space toxic gas spectrum detection system and method, which modulates a wide spectrum infrared light source through different energy levels alternating current, expands the detection characteristic dimension by using spectral nonlinear evolution, and relieves the multi-component gas spectrum line cross interference; relies on a long light path sealed absorption cell and a multi-channel narrow band filter light detector to collect the transmitted spectrum, and completes digitization through hardware filtering and synchronous sampling; adopts interval difference method to extract pulse amplitude characteristics, combines one-dimensional steady-state Kalman filtering denoising and constructs a channel ratio, collects environmental parameters in real time, combines the multi-current channel ratio, derived expansion characteristics and environmental parameters into a multi-dimensional feature vector, and inputs a gradient boosting regression tree model to realize synchronous inversion of multi-component gas concentration. The application significantly improves the detection precision of complex toxic gas in a complex temperature and pressure environment and environmental adaptation ability while reducing the hardware cost, and is suitable for online monitoring of limited spaces such as mines and urban pipe networks.

This invention provides a quantitative detection method for exosomes based on aptamer-functionalized tilted fiber optic gratings combined with gold nanoparticle signal amplification. The detection device consists of a broadband light source, a single-mode fiber, an electrically driven polarization controller, fiber optic clamp 1, a TFBG aptamer sensor, a reaction chamber, an optical three-dimensional adjustment frame, another fiber optic clamp 2, and a spectrometer. The detection principle can be summarized as follows: light emitted from the broadband light source is transmitted through the single-mode fiber to the electrically driven polarization controller, where the incident light is modulated into a P-polarization state. The P-state light is transmitted to the TFBG aptamer sensor, which is tightly suspended and fixed in the reaction chamber by the fiber optic clamp. The final output light signal is presented as a transmission spectrum on the spectrometer. During the detection process, the MUC1 aptamer layer on the surface of the TFBG aptamer sensor selectively captures exosomes produced by breast cancer cell lines. Furthermore, by combining with CD63 aptamers to aggregate gold nanoparticles, the refractive index change on the surface of the TFBG aptamer sensor is amplified, further amplifying the drift in the transmission spectrum. By comparing the relationship between different exosome solution concentrations and the amount of transmission spectrum drift, rapid and highly sensitive quantitative detection of exosomes is achieved. This invention provides a new method for the quantitative detection of exosomes that is highly sensitive, simple to operate, and rapid, and has broad application value in early diagnosis and prognosis in clinical medicine.

The invention provides a method and system for detecting extinction, scattering and absorption characteristics of noble metal nanoparticles, and relates to the technical field of nano optical detection.The method comprises the steps that a sample with single particle distribution is prepared, the dark field scattering spectrum of a single particle is collected under dark field illumination, and the characteristic resonance wavelength of the single particle is determined through pretreatment and formant recognition; switching to bright field illumination, collecting a transmission spectrum at the same position, calculating an extinction spectrum and combining the extinction spectrum with scattering intensity to determine an absorption intensity initial value at a characteristic resonance wavelength; collecting a photo-thermal signal of the particle, and correcting the initial value of the absorption intensity by taking the amplitude of the photo-thermal signal as a correction factor to obtain a corrected absorption intensity value; according to the scattering intensity and the corrected absorption intensity value, the scattering efficiency and the absorption efficiency at the characteristic resonance wavelength are calculated, and then a scattering-absorption adaptation coefficient is determined; and comparing the adaptation coefficient with a dominant threshold, and judging that the nanoparticles are suitable for scattering-dominant, absorption-dominant or scattering-absorption synergistic applications.

This invention belongs to the field of advanced photovoltaic device design and intelligent agricultural equipment technology. It discloses a spectral flexibility control component and method based on adjustable habitat under photovoltaic panels. Through a layered structure design, a switchable spectral control unit is integrated above the photovoltaic cell unit, enabling active regulation of the photovoltaic module between full-power and ecological light transmission states. This component solves the core contradiction in photovoltaic agriculture, allowing the same component to actively and flexibly switch between pursuing high power generation density and ensuring ecological light transmission performance according to actual needs, without sacrificing land power generation benefits or incurring fixed spectral losses. Simultaneously, when grid curtailment occurs, the component can be switched to ecological light transmission state, converting the previously wasted light energy into effective ecological resources that promote crop growth, achieving the ecological utilization of curtailed light. Furthermore, the precise adaptation of the transmission spectrum optimizes the habitat under the panel.