72results about How to "Extended Spectral Range" patented technology

Belonging to the technical field of laser detection, the invention relates to a novel laser spectroscopy induced detection system, especially to a molten steel component online detection system, which is obtained by gathering lasers on a molten steel surface and conducting analysis through induced plasma spectroscopy. The laser spectroscopy induced online molten steel component detection system includes: a concave reflecting mirror, a convex reflecting mirror, a window mirror, a casing pipe, a steel furnace, a computer, a detection point distance dynamic monitoring system, a feedback regulation control device, a laser light source, a light beam turning system, an echelle spectrometer, an integral delay detection system, a laser beam quality control system and the like, and can realize accurate detection of manganese, magnesium, sulfur, carbon and other 20 components contained in molten steel. The detection system provided in the invention can realize real-time detection of molten steel components, reduce the smelting cost, and save resources.

A handheld spectrometer can be configured with a visible aiming beam to allow the user to determine the measured region of the object. When the visible aiming beam comprises the spectrometer measurement beam, the spectrometer measurement beam comprises sufficient energy for the user to see the measurement beam illuminating the object. When the visible aiming beam comprises a separate beam, the visible aiming beam comprises sufficient energy for the user to see a portion of the aiming beam reflected from the object. The visible aiming beam and measurement beam can be arranged to at least partially overlap on the sample, such that the user has an indication of the area of the sample being measured.

The invention discloses a micro-ring resonant cavity electro-optical modulator based on a graphene/molybdenum disulfide heterojunction. The micro-ring resonant cavity electro-optical modulator comprises a substrate layer, a direct-light waveguide, a micro-ring resonant cavity waveguide and a graphene covering layer. The direct-light waveguide and the micro-ring resonant cavity waveguide are embedded into the substrate layer, and a coupling space is reserved between the direct-light waveguide and the micro-ring resonant cavity waveguide. The upper surface of the micro-ring resonant cavity waveguide is covered with a part of the graphene covering layer. The graphene covering layer comprises a first graphene layer, a second graphene layer, molybdenum disulfide, a first electrode and a second electrode, wherein the first graphene layer and the second graphene layer are isolated by the molybdenum disulfide, the first graphene layer stretches outwards from one side of the micro-ring resonant cavity waveguide and is connected with the first electrode, and the second graphene layer stretches outwards from the other side of the micro-ring resonant cavity waveguide and is connected with the second electrode. The micro-ring resonant cavity electro-optical modulator has extremely low optical loss, a low thermo-optical coefficient, low insertion loss, large environment temperature tolerance, a good modulation depth and a high extinction ratio.

A process wherein a polymer, such as DNA, having a defined chemical composition and size is used to template the alignment of polarizing species, such as optically active organic dyes or metal nanoparticles having defined compositional characteristics and/or size and shape characteristics, on a surface to manufacture a thin film polarizer; a process where metal nanorods are aligned on a substrate surface or inside a substrate to make a polarizer; and a polarizer thus made. Multi-layered polarizing structure can be created by using the process of the present invention.

The invention relates to a graphene/poly Schiff base polymer composite material and a preparation method and application thereof, and relates to a poly Schiff base composite material and a preparation method and application thereof. A structural formula of the graphene/poly Schiff base polymer composite material is shown in the specification. The preparation method comprises the following steps of: adding a poly Schiff base, graphene and sarcosine into anhydrous N,N'-dimethylformamide, performing ultrasonic processing, heating to the temperature of between 149 and 156 DEG C under the protection of N2, performing reflux and stirring for 4 to 10 days, reacting, filtering, washing and drying to obtain the graphene/poly Schiff base polymer composite material. The graphene/poly Schiff base polymer composite material can be used as a photoelectric material, and also can be used for detecting sensor devices, electrochromic display devices, acidichromic devices and photochromic devices.

The invention discloses an all-optical modulator apparatus based on black phosphorus. The apparatus includes a pumped laser source, a direct current continuous laser source, a reflector, a dichroic laser beam combiner, a convex lens, a micro nano optical fiber, the black phosphorus, and a bandpass optical filter. The black phosphorus of the invention has good saturated absorption characteristic of spectra from visible light to near infrared light, and can work in a broadband spectrum range. The all-optical modulator apparatus based on the black phosphorus employs the all-optical modulation, overcomes the problem of modulation speed bottleneck of the electro-optical modulation, and has the advantages of the fast optical modulation speed, the low power consumption, the high modulation depth, and compatibility with an optical fiber system.

The invention provides a projection system, comprising a light source system generating a first light beam in a first sequence, and generating a second light beam in a second sequence, wherein the first light beam comprises first light and first compensation light, and the second light beam comprises second light, or the second light beam comprises the second light and first compensation light; a beam split device sequentially dividing the first light beam and the second light beam into the light transmitted along a first optical path, and the light transmitted along a second optical path; a first light modulation device modulating the light transmitted along the first optical path; and a second light modulation device modulating the light transmitted along the second optical path light. The projection system employs the first compensation light to compensate for the first light or the second light, and allows a wider color gamut of a combined color image, thereby satisfying REC. 709 and DCI color gamut standards more; in addition, the projection system employs two light modulation devices to modulate images, and has the characteristics of higher luminous efficiency and brightness, simpler structure and lower cost.

In embodiments of the present invention a second, different waveplate is introduced into a single rotating compensator normal incidence ellipsometer. The second waveplate provides a quarter wavelength retardation that is different from and complementary to that of the first waveplate in order to increase the spectral range for which useful retardation is available, especially towards the deep UV spectrum. The sensitivity for the system may also be increased in the conventional spectral range, since each of the two waveplates may be optimized for its own, somewhat more narrow spectral range of operation. With the proper choice of two waveplates of different retardation, the useful spectral range may be extended from typically 190-820 nm to 150-1000 nm, and beyond if necessary, while increasing the sensitivity within the conventional wavelength range at the same time.

The invention discloses a lens. The lens includes a first lens and a second lens which are arranged in order from an object side to an image side, wherein one of the first and second lenses is a positive lens and the other is a negative lens, a third lens with positive focal power, a fourth lens with negative focal power, a fifth lens and a sixth lens with positive focal power, a seventh lens with positive focal power and an eighth lens with negative focal power. The first, second, third, fourth, fifth, sixth, seventh and eighth lenses are spherical lenses. According to the invention, the eight spherical lenses are combined to form the lens with a large aperture by appropriately selecting and arranging a lens structure, thereby providing the lens with the large aperture in a low-cost way.

A laser vibrometer for measurement of ambient chemical species includes a laser that produces a beam that is split into a reference readout beam and a signal readout beam. A probe laser beam is tuned to an absorption feature of a molecular transition, and generates acoustic signals when incident on a gaseous species via the photo acoustic effect. The scattered acoustic signals are incident on a thin membrane that vibrates. The readout laser beam reflected from the vibrating membrane is mixed with the reference beam at the surface of a photo-EMF detector. Interferrometric fringes are generated at the surface of the photo-EMF detector. Electric current is generated in the photo-EMF detector when the fringes are in motion due to undulations in the signal readout beam imparted by the vibrating membrane. A highly sensitive photo-EMF detector is capable of detecting picoJoules or less laser energy generated by vibrating processes.

The invention discloses a plasmon random laser array device based on a two-dimensional material. The plasmon random laser array device consists of an array of laser chamber units; the integral structure of the random laser array device comprises a pumping light source (1), a substrate (2), bottom electrodes (31), a medium layer (4), laser chamber units (6) enclosed by spacing layers (5) and a top electrode (32) which are successively arranged from the bottom to the top; two ends of a periphery driving circuit (7) are respectively connected to the bottom electrodes (31) and the top electrode (32); the bottom electrode (31), the medium layer (4), the laser chamber units (6) and the top electrode (32) form a closed circuit. The random laser array uses the two-dimensional material nanometer sheet which has high photoluminescence efficiency as a random gain medium, can effectively enhance light scattering through the localized surface plasmon resonance (LSPR) of metal nanometer particles and can reduce the threshold of the laser. Besides, the Plasmon random laser array device can perform dynamic regulation on a radiation spectrum and directivity through changing working voltage of the laser chamber.

The present invention provides a spectroscopic system having a first tunable filter module, a second tunable filter module, an optical detector and a signal processing unit. The first tunable filter module includes a first tunable filter and corresponding control unit. The second tunable filter module includes a second tunable filter and corresponding control unit. The second tunable filter is configured in series with the first tunable filter, and the second tunable filter is selected so that the free spectral range of the second tunable filter matches the half-peak width of the first tunable filter. The optical detector is configured to receive wide wavelength bands of electromagnetic radiation transmitted through the first tunable filter and the second tunable filter and to generate one or more electrical signals indicative of electromagnetic radiation intensity as a function of wavelength.

Described is a method for producing a semiconductor device (100), in which at least one column-shaped or wall-shaped semiconductor device (10, 20) extending in a main direction (z) is formed on a substrate (30), wherein at least two sections (11, 13, 21, 23) of a first crystal type and one section (12, 22) of a second crystal type therebetween are formed in an active region (40), each section with a respective predetermined height (h₁, h2), wherein the first and second crystal types have different lattice constants and each of the sections of the first crystal type has a lattice strain which depends on the lattice constants in the section of the second crystal type. According to the invention, at least a height (h2) of the section (12, 22) of the second crystal type and a lateral thickness (D) of the active region (40) is formed perpendicular to the main direction, in such a manner that the lattice strain in one of the sections (11) of the first crystal type also depends on the lattice constants in the other section (13) of the first crystal type. A semiconductor device (100) is also described, having at least one column-shaped or wall-shaped semiconductor element (10, 20) on a substrate (30), which can be produced in particular by means of the stated method.

An optical attenuator for light communication features that two collimators for output and input optical fibres are aligned to each other via an optical coupling path, in which there is a light barrier whose plane has a 10-70 deg of included angle relative to the axis of said optical coupling path. The front shape of said light barrier may be an acute triangle or its one side is straight line and another side is log curve. The said light barrier is driven by micrometer screw gage. Its advantages include high reliability, attenuation precision and echo loss, large ranges of temp, spectrum and big range.

The present invention relates to an indolinospirobenzoxazine compound, its synthesis method and application. Said synthesis method includes the following steps: under the protection of nitrogen gas dissolving I-(R1)-2,3,3-trimethyl-pseudoindole iodine salt in anhydrous ethyl alcohol adding hexahydropyridine whose concentration is 0.5 wt%-10 wt% catalyst quantity, under the condition of refluxing drop-adding anhydrous ethyl alcohol solution of 2-nitroso-phenol derivative or 2-nitroso-3-R3-5-R2-phenol which is identical to 1-(R1)-2,3,3-trimethyl-pseudoindole iodine salt in gram molecular weight, drop-adding while distilling, after drop-addition continuously refluxing, concentrating, making the above-mentioned silicon gel column so as to obtain the invented product which can be used for making photochromic materials.

The invention belongs to the technical field of nanometer optical fiber band-pass filters, and particularly relates to a tunable broadband nanometer optical fiber band-pass filter. The filter aims atsolving the problems that operating of a band-pass filter of an existing optical fiber system is mainly based on technical means of interference, an optical grating, coupling and the like, so that thebandwidth is narrow, the application wave band is fixed and cannot be tuned, and most existing optical fiber band-pass filters cannot achieve the band-pass filtering effect within a hundred-nanometerrange. The tunable broadband nanometer optical fiber band-pass filter comprises a broadband optical source, nanometer optical fiber, a spectrograph and an optical fiber needle. The nanometer opticalfiber and the optical fiber needle are made from ordinary optical fiber, the cost is low, and the processing difficulty is low; by moving the optical fiber needle, the position, in contact with the nanometer optical fiber, of the optical fiber needle is changed, therefore a transmitted spectrum of the nanometer optical fiber can be adjusted, and spectrum adjustment only needs changes of relative positions of the optical fiber needle and the nanometer optical fiber, and spectrum adjustment cannot be influenced by environment conditions such as parameters of temperature, humidity and the like.

The invention discloses an underground life calling system which comprises a plurality of calling devices, wherein each calling device comprises a power drive module, a composite magnetic doublet antenna, a plurality of broadband magnetic sensors, a signal conditioning and collecting module, a calculation and control module and an uninterrupted power supply (UPS) module, the calculation and control module controls the composite magnetic doublet antenna to send out magnetic field signals through the power drive module, the broadband magnetic sensors receive the magnetic field signals sent out by the composite magnetic doublet antenna in other calling devices and the magnetic field signals are transmitted to the signal conditioning and collecting module to be through broadband signal processing, then transmitted to the calculation and control module to be through signal analysis and processing, and the UPS module is used for supplying power for the broadband magnetic sensors, the signal conditioning and collecting module, the calculation and control module and the UPS module. A full-duplex communication method is applied in the underground life calling system, the magnetic field signals are adopted in signal transmission, and impacts of rock stratum environment are avoided. The underground life calling system is wide in signal cover, safe and reliable, provided with back-up power supplies and capable of guaranteeing continuous calling for help.

The invention discloses a multichannel spectral signal channel selection and reception system used for wireless optical communication. The multichannel spectral signal channel selection and reception system comprises a spectral signal channel selection system and a reception system, wherein the spectral signal channel selection system comprises a liquid crystal module, a liquid crystal drive circuit and a remote control system; and the reception system comprises a detector array, a detector drive and a signal processing circuit. The multichannel spectral signal channel selection and reception system used for wireless optical communication is mainly used for the wireless optical communication, and is capable of implementing selection and reception of optical communication signals at a plurality of spectrum sections by adopting liquid crystal devices and carrying out selection and reception on multichannel single spectral signals for space division multiplexing.