55 results about "Spectral transmission" patented technology

The invention provides a spectrograph based on a fast adjustable filter, the spectrograph comprises the fast adjustable filter, a photoelectric detector, a data acquisition card and a spectrum reconstruction module which are connected in sequence, the fast adjustable filter successively filters spectral components of different wavelengths in the working bandwidth of the spectrograph in sequence, and after each filtering, the spectral components of different wavelengths in the working bandwidth of the spectrograph are obtained. The photoelectric detector detects an optical signal with corresponding light intensity and converts the optical signal into an electric signal, and when the wavelength of the filtered spectral component is within the wavelength range of the to-be-detected light, the light intensity of the optical signal and the current of the electric signal are reduced; the data acquisition card performs current acquisition on each electric signal in sequence to obtain a to-be-measured current vector; the spectrum reconstruction module reconstructs the light spectrum to be measured according to the collected current vector to be measured and a pre-stored spectrum transmission matrix. The spectrograph is high in detection speed, small in size and simple in detection method.

The utility model belongs to the technical field of medical instruments, and particularly relates to an artificial lens for people with color vision disorder. The surface of the intraocular lens is a spherical surface or at least one surface is an aspheric surface or at least one surface is a discontinuous surface, the intraocular lens is colored and at least uses one coloring dye, and the coloring range of the intraocular lens at least comprises part of an optical area. According to the intraocular lens, at least one inhibition band exists in the wavelength range of 380 nm to 780 nm of the spectrum transmittance of the intraocular lens, and the minimum value of the spectrum transmittance in the inhibition band is lower than the nearest peak value of the spectrum transmittance in the wavelength range of 380 nm to 780 nm, so that the situation that the surface roughness is too high due to film coating is avoided, cell deposition on the surface of a film layer is avoided, the color vision correction safety is improved, and the color vision correction efficiency is improved. The correction effect of color vision correction is guaranteed, the problem that the surface reflectivity is high due to the fact that the surface of the artificial lens is coated with a film is effectively solved, optical interference is prevented, the retina is prevented from receiving stray light, and the signal-to-noise ratio of a retina image is prevented from being reduced.

According to an embodiment, a method for determining via an iterative training procedure, a phase modulation function, a spectral transmission function and a post-processing procedure that are useable in a hyperspectral imaging, HSI, apparatus (100) is provided, wherein the HSI apparatus (100) comprises a lens assembly (110) comprising a diffractive optical element, DOE, (112) arranged to implement said phase modulation function that results in a phase delay that varies with the spatial position of an aperture of the DOE (112), an image sensor assembly (120) arranged to receive light through the lens assembly (110), the image sensor assembly (120) comprising a two-dimensional,2D, color filter array, CFA, (124) arranged on an image sensor (122) such that the light received through the lens assembly (110) enters the image sensor (122) through the CFA (124), wherein the CFA (124) is arranged to implement said spectral transmission function that results in a spectral transmission that varies with a wavelength and with a spatial position of the CFA (124); and a controller (130) comprising an image reconstruction portion arranged to derive the HS image based on light received on the image sensor (124) via application of said post-processing procedure that comprises an artificial neural network, ANN, the method comprising processing a plurality of training items through a training network (300) that represents an arrangement of the lens assembly (110), the CFA (124) and the post-processing procedure in the HSI apparatus (100) and that comprises respective training models (302, 304, 306) for determining the phase modulation function, the spectral transmission function and weights of the ANN, and wherein the training model (304) for determining the spectral transmission function accounts for one or more predefined implementation constraints of the CFA (124).

A glass including silica and titania is disclosed. An average hydroxyl concentration of a plurality segments of the glass is in a range from about 20 ppm to about 450 ppm, an average titania concentration of the plurality of segments is in a range from about 6 wt. % to about 12 wt. %, and each segment of the plurality of segments has a length of about 12.7 mm, a width of about 12.7 mm, and a height of about 7.62 mm. The hydroxyl concentration of each segment is measured using a Fourier transform infrared spectroscopy in transmission, the refractive index is measured using an optical interferometer with a 633 nm operating wavelength and a resolution of 270 microns×270 microns pixel size, and the average titania concentration is determined based upon the measured refractive index.

The invention relates to a method and a system for high-sensitivity conformation detection of lactic acid enantiomers based on a terahertz quantum weak measurement spectrum technology and application, the method and the system are applied to a detection system, and the method comprises the following steps: a terahertz transmitting module outputs terahertz waves; the polarization state of the terahertz photons is pre-selected through the first polaroid to serve as a pre-selection state alpha of the quantum system; weak coupling interaction of terahertz waves and lactic acid enantiomers is realized between the pre-selection process and the post-selection process of a system state; a terahertz photon polarization state which is weakly coupled with the lactic acid enantiomer is screened by a second polaroid and is used as a post-selection state beta of the quantum system; the terahertz detection module receives the post-selected output signal; a terahertz quantum weak measurement spectrum transmission model is constructed, and terahertz wave intensity variation is calculated and output and reflects physical properties of lactic acid enantiomers. Through the arrangement, high-sensitivity conformation detection of the lactic acid enantiomer is realized.

The invention relates to a design and preparation method of selective spectral transmission agricultural photovoltaic glass, and belongs to the field of photovoltaic agricultural cross technologies. The agricultural photovoltaic glass is synergistically designed through multiple layers of functional structures and comprises a selective spectrum transmission layer, a bottom diffuse scattering layer and an edge photovoltaic unit. The selective spectrum transmission layer is formed by compositing a photoluminescence substance layer and a glass layer, incident ultraviolet light (300-400 nm) can be converted into red light (620-680 nm), the number of parts beneficial to crop growth in transmission light is increased, selective transmission of incident solar spectrums is achieved, and full transmission of visible light (400-700 nm) and infrared light (700-1000 nm) is guaranteed while ultraviolet light is isolated. The photovoltaic unit is arranged along the edge of the glass, and utilizes the optical waveguide total reflection principle to efficiently collect ultraviolet converted light for power generation. The problems that traditional photovoltaic glass is low in light transmittance and spectral absorption conflicts with plant requirements are solved, and synergistic interaction of greenhouse light transmittance, crop growth and clean power generation is achieved.

Calibrating a spectral imaging device includesproviding first calibration light, with first calibration spectrum (IMPBF),coupling the first calibration light to the device,obtaining a first measured profile of the first calibration light by recording first detector pixel signals during scanning a control parameter of a Fabry-Perot interferometer of the device,obtaining a second measured profile of the first calibration light by recording second detector pixel signals during scanning,determining a first simulated profile from the first calibration spectrum using previously measured spectral quantum efficiency of first detector pixels, previously measured spectral transmittance function, and first calibration data,determining a second simulated profile from the first calibration spectrum using previously measured spectral quantum efficiency of second detector pixels, previously measured spectral transmittance function, and the first calibration data, andmodifying first calibration data until simulated profiles match with corresponding measured profiles.

A switchable privacy display comprises a spatial light modulator and a compensated switchable guest-host liquid crystal retarder arranged between an output display polariser of the spatial light modulator and an additional polariser. A reflective polariser is arranged between the guest-host liquid crystal retarder and the output display polariser. In privacy mode, on-axis light from the spatial light modulator is directed without loss, whereas off-axis light has reduced luminance. The visibility of the display to off-axis snoopers is reduced by luminance reduction and reflection increase over a wide polar field. The colour of the reflected light may be modified by selection of the spectral absorption of the guest material in correspondence to the spectral transmission of the additional polariser. An aesthetically desirable display appearance may be achieved in privacy mode from non-viewing directions. In wide-angle mode, the switchable liquid crystal retardance is adjusted so off-axis luminance and reflectance is substantially unmodified.

An apparatus, system, and method for smoothing spectral transmission modulation in an optical fiber includes at least one holder for coupling a portion of the optical fiber, an optical fiber bending member configured to cyclically move a length of the portion from an initial position perpendicular to a longitudinal axis of the portion. The optical fiber bending member is placed adjacent to the at least one holder, and the movement changes a radius of curvature of the portion.

Noise performance of image sensors is improved by use of inter-pixel comparisons, which may number in the hundreds, all contributing information about a given pixel. This permits accurate determination of image chromaticity, even at extremely low signal-to-noise ratios. In other embodiments, filters of non-conventional spectral transmission functions are employed to reduce metamerism, enabling discernment of scene information not visible to the human eye. Still other embodiments involve fabricating a sparse array of transparent pedestals on an image photosensor array. When color resist is thereafter applied, these pedestals cause thickness variations in the resulting resist layer, leading to pixels having different spectral responses despite using the same color resist. Still other embodiments concern image sensor arrangements enabling generation of red, green, blue and NIR output data using only four conventional (red, green, blue, cyan, magenta, yellow) color resists. Many other novel features and arrangements are also detailed.

The utility model relates to the field of material chemical analysis, and particularly discloses a spectrum electrochemical analysis system for material detection, which comprises an electrochemical workstation, the electrochemical workstation is connected with an electrochemical reaction tank and is used for measuring the current in the electrochemical reaction tank, and a light source is connected with the electrochemical reaction tank through an optical fiber I and is used for measuring the current in the electrochemical reaction tank. The electrochemical reaction tank is connected with the spectrograph through the second optical fiber, light emitted by the light source enters the electrochemical reaction tank after passing through the first optical fiber, and the second optical fiber guides the light into the spectrograph. In conclusion, the spectrum electrochemical workstation provides a powerful tool and support for electrochemical research and application through efficient spectrum electrochemical measurement, accurate light source and spectrum transmission, optimized transmittance bracket design, flexible cuvette bracket application, comprehensive electrochemical connection and integrated three-pole electrode design.

The invention discloses a dynamic target synchronous tracking and interaction system and method, and relates to the technical field of motion capture, and the system comprises an optical positioning module which is used for switching an optical filter to a narrowband infrared optical filter, marking the narrowband infrared optical filter in a Blob mode, capturing the infrared image data of an actor in real time, and obtaining the information of a marking point; the unmarked visual module is used for switching an optical filter to full-spectrum transmission, marking the optical filter as a video mode, and capturing RGB picture data and space depth information of the actor in real time; the mode switching module is used for switching a Blob mode and a video mode and uniformly using the Blob mode for calibration; and the fusion processing module is used for obtaining the real-time three-dimensional model of the actor, obtaining the dynamic space position of the actor, and carrying out fusion synchronous mapping on the real-time three-dimensional model after weight distribution and the dynamic space position. The method and the device have the effect of improving the accuracy and the anti-interference capability in the motion capture process.

An optical detector unit (10) comprising an optical sensor (16) arranged in a chamber (14) with an aperture (18) in a housing (12), wherein the optical sensor (16) is arranged to detect photons received through the aperture (18), and a diffuser (22) arranged on top of the aperture (18) on the housing (12), should provide improved accuracy and data reliability.According to the invention, this is achieved by the optical sensor (16) comprising an arrangement (36) of sensor pixels (38s) of a first type and pixels (38c) of a second type, wherein the pixels (38s) of the first type each have different spectral transmission properties and each generate a multispectral sensor signal, and the pixels (38c) of the second type have the same transmission properties and each generate a compensation sensor signal, and wherein the compensation sensor signals generated by the pixels (38c) of the second type are provided to generate a compensation parameter for each of the sensor pixels (38s).

The invention relates to the technical field of liquid crystal electronic devices, in particular to a calculation method applied to an effective tuning spectral range of a dual-wavelength LCTF (Liquid Crystal Transistor Fiber), which specifically comprises the following steps: determining initial structure parameters; the tuning spectral range of the gain wavelength is limited to be a free spectral range; the condition that only one gain wavelength transmission exists in the free spectral range is limited, and the tuning spectral range of the center wavelength is calculated; the tuning spectral range of the central wavelength is limited to be contained in the free spectral range, and the effective tuning spectral range of the final central wavelength is obtained; accurately calculating the effective tuning spectral range of the gain wavelength; determining a transmission factor Qp meeting conditions according to a theoretical design result, and calculating the retardation of each cascade liquid crystal; simulating spectral transmission of the dual-wavelength LCTF system in a free spectral range; according to the method, the problem that the design process of the transmission factors of the dual-wavelength LCTF system is complicated is solved, and the selection process of the transmission factors of the tuning center wavelength is simplified.

In some embodiments, a spectrometer is proposed. According to some embodiments, the spectrometer includes: an optical sensor array including a substrate and a pixel array formed on the substrate; a spectral filter array formed above the pixels of the optical sensor array, the spectral filter array filtering incident light such that each pixel receives light with a spectral transmission profile associated with that pixel; a transparent spacer formed above the spectral filter array; and an opaque mask having an input aperture that allows light to pass through the transparent spacer and reach a portion of the spectral filter array. The spectrometer can be formed from the optical sensor array using photolithography techniques and a combination of bonding of certain layers.

The invention belongs to the field of optical filters, and particularly relates to an ultraviolet wide-spectrum transmission optical filter capable of reducing irradiation intensity, which adopts a JGS1 substrate single-side coating film structure, and a coating film system is a wide-passband induction transmission film system; the structure of the wide-passband induction transmission film system is S (HL) n1.7 H (0.67 M 1.4 H) m 0.67 M 1.7 H (LH) nA; wherein S is a JGS1 substrate; a is air; h is a high refractive index material; l is a low-refractive-index material; m is a metal material; the optical thickness of H, L and M is lambda0 / 4; m and n are the number of cycles. According to the invention, the ultraviolet radiation intensity is controllable during incidence, and the deep background and wide cut-off of spectrums in a visible region and an infrared region are realized at the same time.

The invention relates to the technical field of optical devices, in particular to a multi-channel integrated optical filter and a manufacturing method thereof.The multi-channel integrated optical filter comprises a plurality of optical filters which are connected in sequence, the spectral transmission ranges of the optical filters are different, the side face of each optical filter is provided with an anti-channeling layer, and the side face of each optical filter is provided with an anti-channeling layer. The light channeling prevention layers are made of one of chromium, chromium oxide, nickel and nickel oxide, the thickness range of the light channeling prevention layers is 100-200 nm, an adhesive layer is arranged between every two adjacent light channeling prevention layers, the adhesive layers are used for connecting the two optical filters in an adhesive mode, the adhesive layers are made of optical cement, and the thickness range of the optical cement is 100-200 nm. And the thickness of the adhesive layer ranges from 10 microns to 20 microns. According to the optical system, a spectrum crosstalk phenomenon among the plurality of optical filters can be prevented, so that the imaging stability of the optical system can be improved, and the detection precision of the optical system can be improved.

The invention relates to a transparent optical article comprising a thermoplastic substrate, at least one UV absorber, and at least one fluorescing dye at least partially inhibiting transmission of light having a wavelength ranging from 400 to 500 nm, wherein the spectral transmission curve of said transparent optical article has a light cut-off wavelength higher than or equal to 400 nm and an inflection point at a wavelength ranging from 400 to 450 nm, and the slope at said inflection point is higher than or equal to 6% / nm.

The invention provides an optical fiber-free spectrum transmission system, which does not need to use an optical fiber to transmit a signal, can avoid the problem of signal attenuation of the optical fiber in an ultraviolet environment for a long time, and further prolongs the service life of equipment. Comprising a spectrometer main body; the spectral information acquisition module is arranged between the spectrograph main body and a to-be-detected sample and is used for receiving an optical signal generated by plasma sparks on the to-be-detected sample and transmitting the optical signal to the spectrograph main body according to a preset signal transmission path; the spectral information acquisition module comprises at least one group of optical elements with optical coupling focusing, and preset angles are formed between the optical elements and the to-be-detected sample and between the optical elements and the spectrometer main body, so that a signal input path and a signal output path are respectively formed; the signal input path is used for receiving and collecting optical signals generated by plasma sparks on the to-be-detected sample; and the signal output path is used for converging and transmitting the optical signals to the spectrometer main body.

The present invention discloses a tumor organoid maturity detection system and a detection method based on infrared spectroscopy technology. The detection system includes a detection chamber, an infrared light source, an infrared spectroscopy sensor, a fixed bracket, and a displacement platform for placing an organoid cell culture plate. The center of the displacement platform is a through hole for spectral transmission and alignment of the organoid sample position. The infrared spectroscopy sensor is located below the displacement platform and is collinear with the infrared light source. The infrared spectroscopy sensor is connected to an embedded control module, which converts the collected optical signal into an electrical signal and inputs it into the embedded system. The present invention solves the problem of difficult real-time monitoring and quantification in the existing organoid inspection, and has the functions of automatic positioning, ensuring the cultivation environment, detecting and identifying the mature stage of organoid cultivation, monitoring the differentiation of organoids, and quantifying the growth progress.

The invention provides a defect detection and repair method for a filling type silicon through hole. The method comprises the following steps: forming the filling type silicon through hole; performing partition scanning on the top surface of the filling type silicon through hole by using a laser confocal system to obtain a three-dimensional surface height distribution diagram of each detection area; emitting terahertz waves upwards from the back surface of the substrate by using a terahertz time-domain spectroscopy system, enabling the terahertz waves to directionally enter a corresponding region at the bottom of the filled through silicon via, and receiving a terahertz reflection signal; based on the three-dimensional surface height distribution diagrams of the detection areas and the corresponding terahertz reflection signals, comprehensively judging whether the detection areas have defects or not and the types of the defects; and if it is judged that the surface cavity defect exists, directional cavity repairing processing is executed. On-line and non-destructive defect detection is realized through a non-destructive detection technology fusing laser confocal scanning microscopy and terahertz time-domain spectrum transmission, and accurate cavity repair is carried out.

An apparatus (500) for spectral measurements comprises: - a Fabry-Perot interferometer (FP1) having an adjustable mirror gap (dGAP), and - a control unit (CNT1) for controlling the mirror gap (dGAP), wherein the apparatus (500) is arranged to: - set the mirror gap (dGAP) to a first mirror gap value (dGAP,1) to provide a first spectral transmittance peak (P1,A) at a first wavelength (λA), wherein the first spectral transmittance peak (P1,A) has an effective spectral width (Δλ1,A,EFF), - change the mirror gap (dGAP) to a second different mirror gap value (dGAP,2) to provide a second spectral transmittance peak (P2,A) at the first wavelength (λA), and a third spectral transmittance peak (P1,C) at a second wavelength (λC), and - control the position of a mirror (M2) of the Fabry-Perot interferometer (FP1) near the second different mirror gap value (dGAP,2) such that the effective spectral width (Δλ2,A,EFF) of the second spectral transmittance peak (P2,A) is substantially equal to the effective spectral width (Δλ1,A,EFF) of the first spectral transmittance peak (P1,A).

The application discloses a dynamic target synchronous tracking and interaction system and method, relates to the technical field of motion capture, and comprises an optical positioning module: used for switching a filter to a narrow-band infrared filter, marking as a Blob mode, capturing infrared picture data of an actor in real time, and obtaining mark point information; a mark-free vision module: used for switching the filter to full-spectrum transmission, marking as a video mode, capturing RGB picture data and spatial depth information of the actor in real time; a mode switching module: used for switching the Blob mode and the video mode, and calibrating by uniformly using the Blob mode; a fusion processing module: used for obtaining a real-time three-dimensional model of the actor, obtaining a dynamic spatial position of the actor, and performing fusion synchronous mapping on the real-time three-dimensional model and the dynamic spatial position after weight distribution. The application has the effect of improving the accuracy and anti-interference capability in the motion capture process.

The object of the invention relates to a method of designing a colour filter for modifying human colour vision by defining the spectral transmission function of the colour filter such as to maximise colour discrimination between more than one element, colour sample, of a colour sample set when a targeted human eye, the colour vision of which is to be modified, is viewing the colour sample set with the colour filter, and at the same time such as to minimise the difference between the colour identification of the colour samples by the targeted eye and a reference eye having a reference colour vision. The object of the invention also relates to such a colour filter, such a colour filter set, and the use of such colour filter and a method for modifying human colour vision.

The invention relates to the technical field of safety detection, in particular to a hydrogen-doped natural gas safety detection method and system based on data analysis, and the method comprises the following steps: analyzing the light intensity change trend of a measurement channel based on the spectral transmittance data in a hydrogen-doped natural gas transmission and distribution pipeline, calculating the spectral transmission variable quantity corresponding to an optical path, and calculating the spectral transmission variable quantity; and screening light energy attenuation characteristics corresponding to the optical path to obtain spectral attenuation characteristic data. According to the invention, the spectral transmittance data is deeply analyzed, the measurement precision of light intensity change and light energy attenuation is improved, the accuracy of spectral attenuation characteristic data is enhanced, and the spectral attenuation curve is optimized and the measurement stability is improved by combining short and long optical path transmission information and identification of differential hydrogen mixing proportions; spectrum data are dynamically corrected by using an offset model, the kinetic energy and the flowing direction of leaked gas are accurately analyzed, the diffusion path of a leakage point is extracted, the safety assessment process is optimized, and the timeliness and the effectiveness of risk early warning are improved.

The application provides a wide-spectrum high-transmittance low-reflectance glass surface modification process and application thereof, relates to the technical field of optical materials and glass surface treatment, and comprises the following steps: providing a glass substrate for wide-spectrum transmission application, and performing surface pretreatment on the glass substrate. The wide-spectrum high-transmittance low-reflectance glass surface modification process and application thereof are characterized in that: the surface of the glass substrate is pretreated, the glass substrate is immersed in a surface modification liquid containing silicon oxide particles and aluminum oxide particles, and a surface modification layer is formed on the surface of the glass substrate after immersion, pulling and drying, so that the optical performance of the glass surface is improved; the obtained glass has high transmittance and low reflectance in a wide-spectrum range of 380nm-1400nm, and can meet the application requirements of wide-spectrum transmission devices such as display cover plates, optical windows, sensor protection sheets, imaging module light transmission components and photoelectric detection components.

A glass including silica and titania is disclosed. An average hydroxyl concentration of a plurality segments of the glass is in a range from about 20 ppm to about 450 ppm, an average titania concentration of the plurality of segments is in a range from about 6 wt. % to about 12 wt. %, and each segment of the plurality of segments has a length of about 12.7 mm, a width of about 12.7 mm, and a height of about 7.62 mm. The hydroxyl concentration of each segment is measured using a Fourier transform infrared spectroscopy in transmission, the refractive index is measured using an optical interferometer with a 633 nm operating wavelength and a resolution of 270 microns×270 microns pixel size, and the average titania concentration is determined based upon the measured refractive index.

An optical detector unit (10) comprising an optical sensor (16) arranged in a chamber (14) having an aperture (18) within a housing (12), the optical sensor (16) being arranged to detect photons received through the aperture (18); and a diffuser (22) arranged on top of the aperture (18) on the housing (12), should provide enhanced accuracy and data reliability. According to the invention, this is achieved in that the optical sensor (16) comprises an array (36) of sensor pixels (38s) of a first type and pixels (38c) of a second type, the pixels (38s) of the first type each having a different spectral transmission characteristic, each generating a multispectral sensor signal, and the pixels (38c) of the second type having the same transmission characteristic, each generating a multispectral sensor signal. Compensation sensor signals are each generated, and wherein the compensation sensor signals generated by the pixels (38c) of the second type are provided for generating compensation parameters for each sensor pixel (38s).

There is provided a method for measuring the spectral transmission response of a DUT using a multi-wavelength Optical Time Domain Reflectometer (OTDR) which allows performing OTDR measurements across a spectral range of interest. The OTDR targets a single reflective OTDR event along the OTDR trace, e.g., a mirror, a non-angled polished (UPC) connector or any other reflective surface located at the remote end of the DUT, which reflectance peak in combination with a reference measurement allows to perform single-end measurements of the transmission response. The process is repeated at various wavelengths to obtain a spectral transmission response of the DUT.

The invention relates to a filter (10) for modifying human color vision, having a spectral transmission function in the visible range, wherein the average transmission in a wavelength range of at least 20 nm width below 530 nm is at least twice the average transmission in a second wavelength range between 530 and 580 nm, and the average transmission in a wavelength range of at least 20 nm width above 580 nm is at least twice the average transmission in the second wavelength range. The invention comprises a dyed carrier lens (12) and an interference filter (14) arranged thereon, the transmission function of the dyed carrier lens (12) and the transmission function of the filter (10) having the following relationship in the second wavelength range: T sd (λ) < 1 - V(λ) · (1 - T(λ)) · n, wherein T(λ): is the transmission function of the filter (10), T sd (λ): is the transmission function of the dyed carrier lens (12), V(λ): is the sensitivity function of the human eye normalized to 1, n ≥ 0.3. The invention also relates to a method for designing such a filter (10).