39 results about "Optical absorption spectra" patented technology

A method of developing a multivariate optical element for an optical analysis system includes forming an optically absorptive spectral element having an optically absorptive material, the optically absorptive material being absorbing in a predetermined spectral region; and utilizing the optically absorptive spectral element in the optical analysis system.

A method of developing a multivariate optical element for an optical analysis system includes forming an optically absorptive spectral element having an optically absorptive material, the optically absorptive material being absorbing in a predetermined spectral region; and utilizing the optically absorptive spectral element in the optical analysis system.

A method of using an optical sensor, the optical sensor comprising a sensing surface comprising graphene layer, the sensing surface located on a substrate, includes determining a first optical absorption spectrum for the graphene layer by a spectrophotometer; adding an analyte, the analyte selected to cause a shift in the first optical absorption spectrum, to the graphene layer; determining a second optical absorption spectrum for the modified graphene layer by a spectrophotometer; determining a shift between the first optical absorption spectrum and the second optical absorption spectrum; and determining a makeup of the analyte based on the determined shift.

Methods and systems for label-free on-chip optical absorption spectrometer consisting of a photonic crystal slot waveguide are disclosed. The invention comprises an on-chip integrated optical absorption spectroscopy device that combines the slow light effect in photonic crystal waveguide and optical field enhancement in a slot waveguide and enables detection and identification of multiple analytes to be performed simultaneously using optical absorption techniques leading to a device for chemical and biological sensing, trace detection, and identification via unique analyte absorption spectral signatures. Other embodiments are described and claimed.

System and apparatus for portable gas detection. Specifically, this disclosure describes apparatuses and systems for optical gas detection in a compact package. There is a need for a very compact, low-power, gas detection system for gases such as CO2, NOx, water vapor, methane etc. This disclosure provides an ultra-compact and highly efficient optical measurement system based on principals of optical absorption spectroscopy. It reduces the size of the instrument as well its power consumption by more than an order of magnitude making it possible to deploy it widely. There is an identified need for large number of distributed gas sensors to improve human health, environment, and save energy usage.

An optical absorption spectroscopy apparatus comprises a light source, a detector for detecting an optical absorption spectrum of light transmitted from the source through a sample volume and one or more reflectors for reflecting the transmitted light multiple times through the sample volume. An adjuster device is provided for adjusting at least one optical element so as to vary the path length of the transmitted light by controlling the number of times the light is reflected through the sample volume. Drive means is provided for driving the adjuster device, so enabling the detector to detect the transmitted light at a range of different path lengths.

An optical absorption spectrometer is provided for determining the concentration of a substance within a sample. The optical absorption spectrometer comprises a first radiation source for supplying radiation to the sample to be measured; at least one cavity for containing the sample during measurement; and a detector assembly for detecting radiation transmitted along first and second optical paths through the sample, the length of the first optical path being greater than that of the second optical path.

An optical absorption spectrometer is provided for determining the concentration of a substance within a sample. The optical absorption spectrometer comprises a first radiation source for supplying radiation to the sample to be measured; at least one cavity for containing the sample during measurement; and a detector assembly for detecting radiation transmitted along first and second optical paths through the sample, the length of the first optical path being greater than that of the second optical path.

The invention discloses a high-efficiency ternary organic solar cell and a preparation method thereof. The active layer of the organic solar cell is obtained by blending a donor material and a receptor material. A ternary organic solar cell containing both non-fullerene and fullerene receptors is prepared by introducing a third component, fullerene acceptor, into the active layer of a binary non-fullerene organic solar cell. The addition of the fullerene receptor not only broadens the optical absorption spectrum of a device and increases the short-circuit current density, but also modifies theshape of the active layer, and finally improves the photoelectric conversion efficiency of the organic solar cell. Further, the active layer of the ternary organic solar cell can be processed at roomtemperature, and a solution can be formed into a film by spin coating, blade coating, and screen printing. Without any physical optimization method, the method can improve the efficiency of the device, reduces the manufacturing cost of the organic solar cell, and is suitable for the roll-to-roll production process.

An optical absorption spectroscopy apparatus includes a field mirror and at least one object mirror configured to reflect transmitted light multiple times between the field minor and the at least one object mirror through a sample volume. At least one fold mirror is configured to allow the transmitted light to double pass across the field mirror. The apparatus can further include a light source and a detector configured to detect an optical absorption spectrum of the light transmitted from the light source through a sample volume.

The present invention provides a system for measuring concentrations of trace gases in gas mixtures using the absorption spectroscopy method. The system comprising: a resonant optical cavity, a continuous-wave stepwise tunable external cavity laser having a DFB laser as a gain media; a detector system for measuring an absorption of laser light by the gas in the resonant optical cavity, wherein the roundtrip optical cavity length of the external cavity laser are the roundtrip optical cavity length of the resonant cavity are close

Methods and systems for label-free on-chip optical absorption spectrometer consisting of a photonic crystal slot waveguide are disclosed. The invention comprises an on-chip integrated optical absorption spectroscopy device that combines the slow light effect in photonic crystal waveguide and optical field enhancement in a slot waveguide and enables detection and identification of multiple analytes to be performed simultaneously using optical absorption techniques leading to a device for chemical and biological sensing, trace detection, and identification via unique analyte absorption spectral signatures. Other embodiments are described and claimed.

Perovskite materials useful in the manufacture of photovoltaic cells are provided. The perovskite materials have the formula AB′0.5B″0.5X3 or A′0.5A″0.5B′0.5B″0.5X3, wherein A, A′, and A″ are organic or inorganic cations, X is a halogen ion, B′ is tin, and B″ is germanium. Embodiments of the mixed tin and germanium halide perovskite materials possess a direct bandgap within the optimal range of 0.9-1.6 eV and have an optical absorption spectrum that is comparable to the state-of-the-art methylammonium lead iodide perovskites. The perovskite materials provided herein have been formulated to be lead-free.

A laser stimulated atom probe for atom probe imaging of dielectric and low conductivity semiconductor materials is disclosed. The laser stimulated atom probe comprises a conventional atom probe providing a field emission tip and ion detector arrangement, a laser system providing a laser short laser pulse and synchronous electronic timing signal to the atom probe, and an optical system for delivery of the laser beam onto the field emitting tip apex. The conventional atom probe is employed in a manner similar to that used for investigation of high conductivity materials. However, the electric field is held static while the laser is pulsed to provide pulsing of the ion emission rate. The laser pulsing is accomplished in a manner similar to prior implementations of pulsed laser atom probe spectroscopy. The laser pulses provide a trigger signal to enable recording the time of flight in the atom probe. The laser operates at a wavelength in the UV in order to enhance the optical absorption in semiconductor or dielectric field emission tips. The increased optical absorption allows efficient thermal pumping of the field evaporation rate. The tip apex field is also used to redshift the optical absorption spectra of the dielectric or semiconducting material under investigation, further enhancing the optical absorption. Due to the enhanced absorption, it is also possible to realize a photo ionization mechanism, wherein the laser stimulates electronic transitions from the more extended surface atoms, thereby ionizing the surface atom. The laser source is collimated by a collimation lens, reflected using dielectric mirrors, directed onto the sample tip using a focusing lens arrangement, collected from the tip using a collection lens, and directed into a beam stop. The laser beam diameter at focus is approximately 3-30 microns, thus, individual emission tips may be scanned from a field of tips illuminated by the laser pulse.

Methods and systems for a label-free on-chip optical absorption spectrometer consisting of a photonic crystal slot waveguide are disclosed. The invention comprises an on-chip integrated optical absorption spectroscopy device that combines the slow light effect in photonic crystal waveguide and optical field enhancement in a slot waveguide and enables detection and identification of multiple analytes to be performed simultaneously using optical absorption techniques leading to a device for chemical and biological sensing, trace detection, and identification via unique analyte absorption spectral signatures. Other embodiments are described and claimed.

Provided herein are techniques for improved optical absorption measurements in the presence of time-varying etalons. In one aspect, a method for dynamic etalon fitting for adaptive background noise reduction in an optical sensor is provided. The method includes the steps of: obtaining a zero-gas spectrum measured using the optical sensor; obtaining an analyte gas spectrum of a target trace gas measured using the optical sensor; comparing the zero-gas spectrum and the analyte gas spectrum using fit parameters that compensate for drifting etalons in the optical sensor; and dynamically extracting the drifting etalons from the analyte gas spectrum to retrieve concentration of the target trace gas.

An optical absorption spectrometry system includes first and second light sources, a dichroic beam combiner and a wavelength selective module. The first light source emits first light having first wavelengths within a first wavelength range, and the second light source emits second light having second wavelengths within a second wavelength range different from the first wavelength range. The dichroic beam combiner includes a predetermined first reflectance / transmission transition region, the dichroic beam combiner being configured to transmit a first portion of the first light and to reflect a second portion of the second light to provide combined light. The wavelength selective module is configured to disperse the combined light received at an entrance aperture, to select a sample wavelength range of the dispersed light as sample light, and to output the sample light having the selected sample wavelength range from an exit aperture for illuminating a sample.

An organic compound, a donor-acceptor conjugated polymer, a formulation and a thin film, wherein a solution of the donor-acceptor conjugated polymer exhibits a peak optical absorption spectrum red shift of at least 100 nm when the donor-acceptor conjugated polymer solution is cooled from 140 DEG C to room temperature.

A system and method for nondestructive detection of gas in a sealed container. The system includes a light source housed in a light source housing and configured to emit a light beam for absorption in a substance to be measured, a detector housed in a detector housing and configured to detect the emitted light beam, a zone that accepts one or more of the sealed containers, each container being substantially optically transparent and containing the substance to be measured, the zone located between the detector and the light source, the light source configured to transmit the light beam through the zone, and a light source purging system comprising a light source channel surrounding the light source and positioned between the light source and the detector housing, the light source channel configured to expel purge gas from a purge gas source into the zone.

Disclosed herein is a glass panel unit including: a first panel including at least a first glass plate; a second panel arranged to face the first panel and including at least a second glass plate; a frame member formed in a shape of a frame corresponding in shape to respective peripheral portions which extend along edges of the first panel and the second panel, and bonded to the peripheral portions; and at least one spacer provided in a vacuum space between the first panel and the second panel. The at least one spacer contains a polyimide. The polyimide has an absorption edge at which an absorption index decreases in an optical absorption spectrum ranging from an ultraviolet ray to visible radiation. The absorption edge is equal to or less than 400 nm.

The invention discloses a discrete three-dimensional fluorescence / visible light absorption spectrum detection device for discriminating water quality pollution, which integrates a water path, a circuit and a light path, adopts a small spectrometer and a prism light splitting module, and is low in cost and convenient to carry and maintain; a discrete three-dimensional fluorescence spectrum and an absorption spectrum can be obtained at the same time in one-time on-site detection, and a characteristic peak is enhanced by utilizing the relevance of light absorption and fluorescence mechanisms. After circulating sampling is set, uninterrupted in-situ continuous measurement can be achieved, obtained spectral data cover water quality abnormal information and pollution type information at different times, and the data obtained through the device can be used for rapidly judging whether pollution exists or not and the pollution type. Through a side cloud cooperation mode, detected bottom layer data does not need to be uploaded to a cloud end for analysis, computing resources can be shared by a plurality of detection devices, the network flow of water quality analysis is saved, and the processing speed and the operation efficiency are improved.

A hydroxygallium phthalocyanine pigment is characterized by having a maximum peak wavelength within a range of from 810 nm to 839 nm in optical absorption spectrum in a wavelength range of from 600 nm to 900 nm.

The invention discloses a chip absorption spectrum measurement method, device and equipment, and a storage medium. A chip comprises an emission optical device and an absorption optical device. The transmitting optical device is used for transmitting an optical signal to the absorbing optical device; the method comprises the following steps: controlling an emission optical device to emit an opticalsignal to an absorption optical device; controlling an absorption optical device to absorb the emitted optical signal, and collecting a light absorption spectral line of the absorption optical device; and determining a light absorption spectral line of the chip based on the light absorption spectral line of the absorption optical device. In this way, an optical signal can be directly emitted to the absorption optical device through the emission optical device of the chip so as to acquire the light absorption spectral line of the absorption optical device. Since the light absorption capabilityof the chip mainly depends on the light absorption capability of the absorption optical device, the light absorption spectral line of the chip can be determined according to the light absorption spectral line of the absorption optical device.

The invention relates to the technical field of medical images, in particular to a common CT computer imaging omics stone component analysis system and method, and the system comprises a central processing system, a data collection unit, a data analysis module, printing equipment and a mobile phone terminal. The input end of the central processing system is unidirectionally and electrically connected with a system firewall, and the data collection unit is connected with the system firewall through a wireless network. Calculus components are analyzed through CT computer imaging omics and compared with data in a database, the defects of an existing calculus analysis method are overcome, and the calculus analysis method has the advantages that calculus can be detected and analyzed more accurately and effectively, data are prevented from being lost in the transmission process, and then detection errors can be reduced. The problem that at present, infrared spectrum detection analysis is mainly adopted for calculus component analysis, the infrared light absorption band characteristic of a calculus sample is not high enough, and certain errors exist in detection of some calculus components is solved.