510 results about "Medium wave" patented technology

The invention relates to a laser and middle- and long-wavelength infrared common-aperture three-band imaging system, which comprises an entrance pupil shared by each band, a primary mirror, a secondary convex mirror, a middle/long-wavelength infrared optical path imaging lens group, a laser converging light spot receiving unit, a middle- and long-wavelength infrared band beam splitter, a middle- and long-wavelength infrared dual-band imaging lens group and a detection image surface, wherein the reflection surface of the primary mirror is a concave surface, and a hole is formed in the center of the primary mirror. The system can be used for realizing the common-aperture collection of scene infrared radiation energy of the same object and laser echo energy reflected by the object; and the entrance pupil is positioned in front of the primary mirror, the secondary mirror is used for the beam splitting of laser and middle- and long-wavelength infrared bands, and a dichroic mirror is inclined to split middle-wavelength infrared light and long-wavelength infrared light, so that the system is compact in structure, the utilization rates of optical energy and space of the system are increased, the aberration correction and beam focusing of middle- and long-wavelength infrared bands are facilitated respectively, and the imaging quality is remarkably improved.

The invention discloses a medium wave infrared continuous zoom lens. The medium wave infrared continuous zoom lens comprises a first lens group with positive diopter, a second lens group with negative diopter, a third lens group with positive diopter, a fourth lens group with negative diopter, a first reflector for turning back a light path, a flat plate reference source for correcting a background, a fifth lens group with positive diopter and a sixth lens group with positive diopter from an object space to an image space, wherein the first lens group serving as a front fixing group comprisesa crescent silicon positive lens of which the convex surface faces the object side and a crescent germanium negative lens of which the convex surface faces the object side; the second lens group is used as a zoom group; the third lens group is used as a compensation group; the fourth lens group is used as a rear fixing group; the fifth lens group is used as a relaying group; and the sixth lens group is used as a focusing group. The medium wave infrared continuous zoom lens can be applied to 640*512-element or even larger surface array refrigeration medium wave detectors; and the medium wave infrared continuous zoom lens has a simple structure and low motion charge; and only two lenses move during zooming.

The invention provides a multiband infrared radiation automatic measuring system which can timely and automatically measure the infrared radiation characteristics of a measured object within different bands under complicated backgrounds and completely meets the requirements of long-term fault-free automatic observation radiation calibration measurement. The multiband infrared radiation automatic measuring system comprises a scanning device, a light splitting device, an infrared detection device and a control system/circuit, wherein the scanning device, the light splitting device and the infrared detection device are sequentially arranged on a light path in a radiation incident direction; and the scanning device comprises a protection window capable of rotating, a rotary reflecting mirror and a fixed double-blackbody correction assembly. In the invention, light spectrum light splitting and band modulating and canning technologies are used, and two medium and long wave detectors are selected to match with the technologies, thereby increasing measurable optical channels to effectively form the radiation calibration measurement to more long-wave and medium wave bands. Moreover, the radiation size required by a blackbody radiation cavity is compressed, the design and manufacture difficulties of the blackbodies are reduced, and the controllable precision is improved.

The invention provides a low-cost refracting-reflecting athermalizing medium wave infrared lens and aims at providing a low-cost refracting-reflecting optical lens which is small in aspherical mirror number, low in cost, made of a small amount of aspherical lenses and conventional silicon and germanium optical materials at a 3.7-4.8 [mu]m medium-wave infrared band and having the optical passive athermalizing performance. The technical scheme is that parallel light enters a main reflection spherical mirror (3) to form a converged light beam through a spherical cover (2) in an incidence mode, a convergence angle is decreased through a Mangin refracting-reflecting mirror (4), a primary mirror face (5) is formed by decreasing a part of aberration and increasing a part of balanced aberration and negative thermal difference of a lens to be arranged behind, the light beam is changed into divergent light, the divergent light enters a negative lens (6) made of an aspherical germanium material and a positive meniscus lens (7) made of a silicon material so as to reduce chromatic aberration and aberration, then converges through a positive convex lens (8) made of the silicon material, enters a detector window (9) and finally forms an image on a detector focal plane (11) through a cold light diaphragm (10), and the whole imaging process is finished.

The invention discloses a device and a method for cooperatively detecting a moving target by using all-optical-waveband (including ultraviolet, visible, near-infrared, medium-wave infrared and long-wave infrared) maps. The device comprises a large field-of-view two-dimensional scanning sighting telescope, a common aperture primary optical system module, an infrared imaging and spectrum forming optical subsystem module, an ultraviolet/visible/near-infrared spectrum forming and visible near-infrared imaging optical subsystem module, a short/medium/long-wave infrared spectrum measuring module, a medium-wave wide/narrow band imaging module, a visible near-infrared spectrum measuring module, a visible near-infrared imaging module, an ultraviolet measuring module, a map fusion signal processing module, a control module and a servo system. The device and the method utilizes medium-wave infrared imaging and visible near-infrared imaging for recognizing a suspected moving target and guides spectrum measurement, completes the final recognition of the suspected target with cooperation of spectrum measurement data, and solves the difficulties of the existing detection device such as incomplete detection bands, limited optical path layout, large equipment size, few types of detected moving targets and dynamic changing objects, and poor detection capability.

The invention discloses a short wave/medium wave/long wave infrared detector based on InAs/GaSb class II-type superlattice materials. The detector comprises a GaSb substrate, an epitaxial structure deposited on the GaSb substrate, a passivation layer and a metal electrode, wherein the epitaxial structure sequentially comprises a GaSb buffering layer, an n-type InAs/GaSb superlattice contact layer, a first M-type InAs/GaSb/AlSb/GaSb/InAs superlattice hole blocking layer, a p-type InAs/GaSb superlattice long wave infrared absorbing layer, a first p-type InAs/GaSb superlattice contact layer, a p-type InAs/GaSb superlattice medium wave infrared absorbing layer, a second M-type InAs/GaSb/AlSb/GaSb/InAs superlattice hole blocking layer, a p-type InAs/GaSb superlattice short wave infrared absorbing layer, a second p-type InAs/GaSb superlattice contact layer and a cover layer. The detector is of a pMp-p-pi-M-n heterostructure and has the advantages of being low in crosstalk, low in dark current and high in detection rate.

An on-vehicle apparatus for recognizing objects is provided. The apparatus comprises a transmission/reception unit, detection unit, estimation unit, and specification unit. The transmission/reception unit transmits a medium wave toward a desired directional range from the vehicle and receives reflected waves of the medium wave and the detection unit detects objects existing in the desired directional range on the basis of the reflected wave. The estimation unit estimates a possibility that each detected object has been detected based on a reflected wave from a first part (e.g., cabin) of a further vehicle other than a second part (e.g., rear part) of the further vehicle, the first part being other than the second part that is the closest in distance to the apparatus-mounted vehicle. The specification unit specifies the second part as an object to finally be recognized of the apparatus-mounted vehicle depending on an estimated result by the estimation unit.

The invention discloses a U-shaped folded medium wave infrared 30-times continuous zooming optical system, which sequentially consists of a front fixed set, a zooming set, a compensation set, a rear fixed set, a first reflector, a secondary imaging set, a second reflector and a ternary imaging set from an object side to an image side. The system has a structure of which focal power distribution is sequentially positive, negative, positive, negative, positive and positive. The two-component zooming principle and the ternary imaging technology are adopted in the system, the focal length is continuously variable in a range of 23 to 701 millimeters, the travel of the zooming set is 194 millimeters, the travel of the compensation set is 39 millimeters, 30-times continuous zooming is realized, the optical total length of the system is only 559 millimeters, the ratio of the total length to the focal length is 0.79, the overall shape size of the system is 345mm*176mm*224mm (length*width*height), the F value of the optical system is 4 and constant, and the system has the advantages of large zooming ratio, low optical total length, smooth overall zooming locus and excellent imaging quality in the whole focal length range.

The invention discloses a mutually-visual-field common-aperture multi-spectral imaging system with a Cassegrain front end. The system comprises a main lens, a refracting-reflecting dual-purpose secondary lens, a medium wave or long wave infrared or medium-long wave infrared dual-waveband imaging lens group, a medium wave or long wave infrared or medium-long infrared double-color detector unit, a visible to near infrared band imaging lens group, a visible to near infrared band color analyzer and a detection unit, wherein the main lens is provided with a central opening; the reflecting surface of the main lens is a concave surface; and the incident surface of the refracting-reflecting dual-purpose secondary lens is a convex surface. In the system, the main lens is taken as a public entrance pupil of each waveband and primary light splitting is realized by using the secondary lens, so that the luminous energy utilization ratio is increased, the spaces of a spectroscope and the system are saved, the realization of a long aperture and a large visual field is facilitated, and the imaging quality is improved remarkably. Due to the adoption of co-optical-axis mutually-visual-field imaging, images are easy to register.

The invention discloses a bicolor dual-view field infrared imaging optical system. The bicolor dual-view field infrared imaging optical system is characterized by consisting of five lenses including a front fixing lens set (9), a multifocal lens set (10) and a rear fixing lens set (11), wherein the front fixing lens set consists of two lenses, the multifocal lens set consists of one lens, and therear fixing lens set consists of two lenses. The multifocal lens set can axially move in front of or behind a primary image surface to realize switching between a wide view field and a narrow view field; in the five lenses, lenses with a binary diffraction surface is used as a second surface of a second lens and a second surface of a fourth lens. The bicolor dual-view field infrared imaging optical system has the advantages of simple and compact structure, small system size and less lenses, can simultaneously performing imaging at a medium wave infrared wave band with wavelength of 4-5 microns and a long wave infrared wave band with wavelength of 8-9 microns while implementing functions of searching (a wide view field of 9 degrees* 6.75 degrees) and aiming (a narrow view field of 3 degrees*2.25 degrees). The system design takes account of miniaturization and lightweight requirement of the infrared system and meets the use technology requirement of the infrared system.

The invention provides an elastic migration seismic wave field construction method and an elastic migration seismic wave field construction device. The method includes computing a finite difference coefficient of extended compact staggered grids according to an elastic wave velocity stress equation; computing a finite difference operator matrix of the extended compact staggered grids; constructing forward direction extrapolation operator of a seismic source wave field, and a reverse-time extrapolation operator of a detection wave field; achieving forward direction extrapolation of a seismic wave field to obtain the seismic source wave field according to the forward direction extrapolation operator of the seismic source wave field, a preset medium model and a preset seismic source function; and achieving reverse-time extrapolation of the seismic wave field to obtain the detection wave field according to the reverse-time extrapolation operator of the detection wave field, a preset medium model and preset multi-component seismic data. Compared with an existing method for constructing an elastic deflection seismic wave field by utilization of a conventional finite difference method and a compact difference method, the number of difference base frame grid points is reduced under the condition of same difference orders, the construction precision of a complex medium wave field can be effectively improved, and therefore the imaging precision of reverse-time migration is improved.

The present invention provides a film system structure of ZnS substrate with inverse 0.5-0.8[Mu]m visible light, laser with 1.064[Mu]m and transparent medium wave infrared colour separation with 3.7-4.8[Mu]m. The film system structure comprises a ZnS substrate and a color separation film system, and the color separation film system is made of three film materials; the number of the film layers is 51, wherein the first layer and the 51th layer are oxidation zirconium film layer, the even layers from the second layer to the 50th layer are ytterbium fluoride film layers and the odd layers from the second layer to the 50th layer are zinc sulfide film layers. The transmittance is smaller than 2% with the waveband from 0.5 to 0.8 [Mu]m; the transmittance is smaller than 1% with the laser waveband of 1.064 [Mu]m; and the transmittance is larger than 95% with the medium wave infrared band from 3.7 to 4.8 [Mu]m. The film system structure is small in the number of layers, small in thickness, low in plating difficulty, good in technology repeatability, high in obtained film firmness and good in spectral property, is able to satisfy the use requirement of multi-waveband co-window optoelectronic system and the work requirement in the condition of the inclination with 45 degrees, and stand against the environment tests such as high and low temperature storage, temperature impact and the like, the adhesion test and the moderate friction test.

The invention relates to a microwave heater for heating liquid and/or gases, which consists of a heating chamber, a microwave generator and a temperature measurement and control system, wherein the heating chamber consists of three functional layers, namely an external wave-reflecting heat-conducting metal shell, a medium wave absorbing and heating layer and an internal wave-transmitting thermal insulation layer. The microwave heater is characterized in that: after passing through the thermal insulation layer, microwaves emitted by the microwave generator are absorbed by the wave absorbing and heating layer for heating; and heat is transmitted outward to the metal shell which transmits the heat to surrounding liquid and/or gases to realize the heating of flowing or static liquid and/or gases at last. The microwave heater unit with the structure can be used singly or a plurality of microwave heater units are used in serial and/or parallel connection. The microwave heater has the advantages of simple structure, low manufacturing cost, high thermal efficiency, easy replacement, maintenance and carrying and high safety due to non-contact heating, and can be used as a heat source in various fields such as large and small shower water heaters, hydrothermal heating, hot air heating and industrial production.

The invention relates to a method for determining the protective distance between an AC line with extra-high voltage and a medium wave navigation station, which adopts the method of moments for computing the electric current distribution on the AC transmission line with extra-high voltage and a simplified model of the AC transmission line with extra-high voltage; furthermore, the method comprises the following steps: firstly the method adopts the method of moments and the simplified model of the AC transmission line with extra-high voltage for computing the electric current distribution on the AC transmission line with extra-high voltage, computes a secondary radiation intensity vector which is generated by the induction current according to the acquired induction current distribution on the electric current transmission line, implements the superimposing of the secondary radiation intensity vector and a source radio wave, and computes the interference influence intensity of the AC transmission line with the extra-high voltage of 1000 kilovolts on a medium wave navigation station, thus acquiring the protective distance for the passive jamming between the AC transmission line with extra-high voltage and the medium wave navigation station. The test data comparison acquired from a test proves that the method for determining the protective distance between the AC line with extra-high voltage and the medium wave navigation station has higher accuracy and is applicable for the precise computation of the electromagnetic protective distance between an electric current transmission line with high voltage and an adjacent radio station in the future.

The invention discloses a GaAs/AlGaAs/InGaAs two color quantum trap infrared focal plane detector, which adopts a GaAs-base material, to alternately grow up AlGaAs potential barrier, GaAs quantum trap, AlGaAs potential barrier, InGaAs quantum trap, and AlGaAs potential barrier, using the intersubband transition in GaAs quantum trap to form a survey of long wave band, and using the intersubband transition in InGaAs quantum trap to form a survey of medium wave band. According to the GaAs quantum trap of long wave detection, the AlGaAs/InGaAs/AlGaAs layer forms a potential barrier of GaAs quantum trap; and to the InGaAs quantum trap of medium wave band, the AlGaAs/GaAs/AlGaAs layer has also comprised the potential barrier of InGaAs quantum trap; and the total thickness of the AlGaAs/GaAs/AlGaAs layer and the total thickness of the AlGaAs/InGaAs/AlGaAs layer is made to be a potential barrier thickness in the conventional quantum grap infrared detector, wherein the factor of the decrease of optical coupling efficiency of devices because of the increase of thickness is eliminated. In optical coupling manner, the two-dimension diffraction grating of binary cycle is adopted, and a shallow depth etching method with minor difficulty is adopted in grating etching technics.

The invention relates to a substrate material used for the growth of a mercury cadmium telluride material by a liquid phase epitaxy method. On the basis of the prior substrate material, a layer of cadmium zinc telluride single-crystal film completely matched with the lattice constant of mercury cadmium telluride is grown. The substrate material of the invention has the advantages that an epitaxial film has high lattice quality, and compositions can be flexibly adjusted according to the lattice constants of short wave, medium wave and long wave mercury cadmium telluride materials; meanwhile, the cadmium zinc telluride film has even compositions; the method adopts mature process, and has the advantages of simpler process equipment, short process cycle and low cost; and the substrate material with large area, high quality and high composition evenness can be provided for an infrared focal plane detector.

The invention discloses a tilted layered viscoelasticity dielectric medium wave field forward modelling method. The method aims at viscoelasticity layered medium, wherein a geologic model of the viscoelasticity layered medium is provided with a tilted interface, a spherical wave stimulated by a point source is decomposed into a plane wave, a character that vector wave equation does not rely on a coordinate system is utilized, under a fixed coordinate system and a moving coordinate system which changes along with the tilted interface, spreading of waves is alternately discussed, firstly, reflection and transmission coefficients of the plane wave of a single tilted interface are deduced through traditional reflection and transmission coefficients, reflection and transmission waves of the interface are obtained, then the reflection and transmission coefficients of the plane wave when passing through multiple tilted interfaces are obtained by recurrence, and finally plane waves after transmitted are combined to obtain a point source excitation wave field. In the process of combination, a rapid oscillatory integral calculation method and an integral path which is suitable for viscoelasticity medium are adopted.

The invention relates to a medium wave infrared 30 times continuous zooming optical system without a rear fixed group. The optical system consists of a vari-focal objective lens and a repeater group from an object side to an image side; the vari-focal objective lens consists of a front fixed group lens, a variable time group and a compensating group, the focal powers of the three groups of lenses are distributed into a positive structure, a negative structure and a positive structure in sequence, and the zoom function is realized by the axial movement of the variable time group and the compensating group; the repeater group consists of four lenses, the first lens is a double-convex silicon positive lens, the second lens and the third lens are falcate germanium negative lens facing to the image side, and the fourth lens is a zinc selenide positive lens with the convex surface facing to the image side and is used for repeating an image and stabilizing an image surface in a zooming process. According to the optical system, the double-component mechanical compensation zooming without the rear fixed group and the secondary imaging technology are adopted, the 30 times of large zooming ratio is realized, the focal distance can be changed continuously in a range from 17.5mm to 525mm, the maximum stroke of the zooming group is 106mm, the maximum stroke of the compensating group is 50mm, the total optical length of the system is 350mm, and 100% of cold stop efficiency is realized.

The invention discloses an infrared-visible light dual-band photoelectric detection system and an axis angle error measuring method. The Infrared-visible light dual-band photoelectric detection systemand axis angle error measuring method comprises a reflecting system, a beam splitter, a visible light imaging unit on a reflecting path of the beam splitter, a medium-wave infrared imaging unit on atransmitting path, and an axis angle error measuring unit. The axis angle error measuring method comprises: I, initializing a CCD (charge coupled device) sensor, and acquiring a background gray image;II, centering a medium-wave infrared axis; III, performing visible light spot imaging; IV, acquiring a visible light spot image; V, acquiring coordinates of a center of mass of the visible light spotimage; VI, calculating axis angle error. The infrared-visible light dual-band photoelectric detection system and the axis angle error measuring method have the advantages that the advantages of a visible light band optical system and those of a medium-wave infrared band optical system are combined, observing efficiency and inspecting efficiency are improved, remote high-definition all-weather imaging is achieved, imaging quality is effectively improved, the axis angle error measuring unit can measure angle errors for visible light axis and medium-wave infrared axis, and stability of the photoelectric detection system can be measured.

The invention relates to a technology for enriching soybean sprout isoflavone. The technology adopting physiologically active soybean grains as a raw material comprises the following steps: disinfecting the raw materials in an aqueous sodium hypochlorite solution through a known method, placing the disinfected raw material in purified water with according to a ratio of 3-5:1 (v/w), immersing the raw material at 30 DEG C for 5 h, placing the immersed raw material in a germinator, and germinating the raw material at 30 DEG C; and continuously radiating medium wave ultraviolet lights (UV-B) (with the wavelength of 280-320 nm, the radiation distance of 30-50 cm and the radiation distance of 20-50 [mu]W.cm<-2>) on the germinated soybeans for 2-4 d in the germination period, and carrying out spray germination with a 0-15 [mu]M abscisic acid (ABA) and 0-3 mM sodium nitroprusside (SNP) mixed aqueous solution for 1-3 min every 1-4 h, wherein the flow amount of the above spraying liquid is 50-200 mL/min. The technology is simple to operate, and allows the content of isoflavone in the soybean sprouts to reach 4000-5500 [mu]g/g DW.