Journals >Journal of Infrared and Millimeter Waves
Contents
2003
Volume: 22 Issue 4
17 Article(s)
Export citation format
Research Article
MODE MATCHING ANALYSISOF A NEW OMNIDIRECTIONAL CIRCULAR ROD ANTENNA WITH DOUBLE DIELECTRIC GRATINGS FORMILLIMETER-WAVE APPLICATION
[in Chinese], and [in Chinese]
The radiationcharacteristics of a new millimeter-wave omnidirectional circular rod antenna with doubledielectric gratins are analyzed with the rigorous mode matching method. The resultsindicate that under the condition of the same radiation intensity, the double gratingantenna has relatively smaller dimensions than thaThe radiationcharacteristics of a new millimeter-wave omnidirectional circular rod antenna with doubledielectric gratins are analyzed with the rigorous mode matching method. The resultsindicate that under the condition of the same radiation intensity, the double gratingantenna has relatively smaller dimensions than that of the single one. It is undoubtedly agreat importance in the case where the limitation of the weight and volume of system isstrictly required. The effectiveness and reliability of the present analysis are verifiedby the related results given in the literature..
Journal of Infrared and Millimeter Waves
- Publication Date: Jan. 01, 1900
- Vol. 22, Issue 4, 241 (2003)
NUMERICAL SIMULATION OF INFRARED RADIATION PROPERTIES OF SOLID ROCKET ENGINE EXHAUST PLUME
[in Chinese], [in Chinese], and [in Chinese]
In the case of certain parameters for concentration and temperature profile, particle and radiation properties of gas, the finite volume method in body-fitted coordinates is used to calculate the infrared spectral properties of the solid rocket exhaust plume with anisotropic scattering particles, results of which are cIn the case of certain parameters for concentration and temperature profile, particle and radiation properties of gas, the finite volume method in body-fitted coordinates is used to calculate the infrared spectral properties of the solid rocket exhaust plume with anisotropic scattering particles, results of which are compared with those of discrete ordinate method. Apparent spectral radiative intensities at 2.7μm and 2.95μm and band radiative intensity within 2.7～2.95μm are analyzed. Furthermore, the errors caused by isotropic scattering or no scattering approximation to non-linear anisotropy scattering model are investigated..
Journal of Infrared and Millimeter Waves
- Publication Date: Aug. 01, 2003
- Vol. 22, Issue 4, 246 (2003)
DEVELOPMENT AND APPLICATION OF INFRARED TARGET SIMULATOR CALIBRATION SYSTEM
[in Chinese], and [in Chinese]
By using the method of deflecting the standard radiation and the IRTS (IR Target Simulator) radiation into IR spectroradiometer alternatively, the developed IRTSCS(IR Target Simulator Calibration System) can calibrate IRTS directly. IRTSCS is consists of a standard collimating unit, a radiation-deflecting device and anBy using the method of deflecting the standard radiation and the IRTS (IR Target Simulator) radiation into IR spectroradiometer alternatively, the developed IRTSCS(IR Target Simulator Calibration System) can calibrate IRTS directly. IRTSCS is consists of a standard collimating unit, a radiation-deflecting device and an IR spectroradiometer. The standard collimating unit contains a standard blackbody working in temperature of 50℃～1050℃ and a collimator which main mirror is an off-axis paraboloid of aperture 300mm. The radiation-deflecting device is composed of a 465mm aperture of reflecting mirror and a rotating platform with locating precision of 5″. IR spectroradiometer adopts CVF (Circular Variable Filter) to disperse the incident radiation. It has three working spectral in the ranges of 1μm～3μm, 3μm～5μm and 8μm～14μm respectively. Testing datum of the three ranges show that the minimum spectral irradiance of calibration is lower than 10 -11W/cm2. The relative standard uncertainty of IRTSCS is 2% ..
Journal of Infrared and Millimeter Waves
- Publication Date: Aug. 01, 2003
- Vol. 22, Issue 4, 251 (2003)
INVESTIGATIONS ON OPTICAL PROPERTIES OF VERY THIN Bi3.25La0.75Ti3O12 FERROELECTRIC THIN FILMS
[in Chinese], [in Chinese], [in Chinese], [in Chinese], [in Chinese], and [in Chinese]
Bi 3.25La 0.75Ti 3O 12 (BLT) ferroelectric thin films (<100nm) were deposited on Pt/Ti/SiO 2/Si substrates using chemical solution methods. The ultraviolet-visible ellipsometric spectra of the BLT thin films have been investigated in the photon energy range of 2～4.5eV. Based on the classical optical functions of theBi 3.25La 0.75Ti 3O 12 (BLT) ferroelectric thin films (<100nm) were deposited on Pt/Ti/SiO 2/Si substrates using chemical solution methods. The ultraviolet-visible ellipsometric spectra of the BLT thin films have been investigated in the photon energy range of 2～4.5eV. Based on the classical optical functions of the dielectrics and five-phase structure model, the optical constants of the BLT thin films in the transparent and absorption region, the surface roughness, the thicknesses of the BLT thin films and the interface layer between the films and substrates were simultaneously obtained by the fitting. The dispersion of the refractive index in the transparent region fitted well to a single-term Sellmeier relation. Finally, a 3.96ev direct band gap of the Bi 3.25La 0.75Ti 3O 12 thin films was obtained employing Tauc's principle..
Journal of Infrared and Millimeter Waves
- Publication Date: Aug. 01, 2003
- Vol. 22, Issue 4, 256 (2003)
THE DESIGN FOR TEC CIRCUITS AND TIMING SEQUENCE OF 128×128 INFRARED FOCAL PLANE ARRAY
[in Chinese], and [in Chinese]
The system design is proposed based on 128×128 UFPA(Uncooled Focal Plane Array) of uncooled staring infrared camera. A new kind of TEC's circuit design for IRFPA is emphasized. And the implementation of FPGA for timing sequence of RIOC is also discussed. The method of design is characterized by high integratioThe system design is proposed based on 128×128 UFPA(Uncooled Focal Plane Array) of uncooled staring infrared camera. A new kind of TEC's circuit design for IRFPA is emphasized. And the implementation of FPGA for timing sequence of RIOC is also discussed. The method of design is characterized by high integration, high precision, low cost and simple topology. It provides the design idea for the development of the thermal imager system..
Journal of Infrared and Millimeter Waves
- Publication Date: Aug. 01, 2003
- Vol. 22, Issue 4, 261 (2003)
AN AUTOMATIC TARGET RECOGNITION ALGORITHM BASED ON CORRELATION OF INFRARED MULTISPECTRAL IMAGERY
[in Chinese], [in Chinese], [in Chinese], and [in Chinese]
new automatic target recognition algorithm based on infrared multispectral imagery correlation (IMIC) is presented. According to infrared multispectral characteristic information (such as radiation intensity and spectral distribution) of targets, background and decoys, an infrared multispectral eigenmatrix of scenario new automatic target recognition algorithm based on infrared multispectral imagery correlation (IMIC) is presented. According to infrared multispectral characteristic information (such as radiation intensity and spectral distribution) of targets, background and decoys, an infrared multispectral eigenmatrix of scenario is constructed. An infrared multispectral eigenmatrix of interesting targets is reconstructed after segmenting image by maximum-error-method and fusing target information of space and spectrum. An infrared multispectral imagery correlation recognition method is formulated in terms of spectral radiation difference of interesting targets. Digital simulation experiment result verifies that the algorithm is proper and feasible.
Journal of Infrared and Millimeter Waves
- Publication Date: Aug. 01, 2003
- Vol. 22, Issue 4, 265 (2003)
STUDY ON THE PREPARATION OF LaNiO3 THIN FILMS USING CHEMICAL SOLUTION DECOMPOSITION METHOD
[in Chinese], [in Chinese], [in Chinese], [in Chinese], [in Chinese], [in Chinese], and [in Chinese]
LaNiO 3 thin films on Si(100) substrates were prepared using chemical solution decomposition method (CSD). The effects of annealing atmosphere (air and oxygen) on the crystallinity, grain size and resistivity of LaNiO 3 thin films, and the PZT films grown on the LNO layers were studied. The results showed that the valuLaNiO 3 thin films on Si(100) substrates were prepared using chemical solution decomposition method (CSD). The effects of annealing atmosphere (air and oxygen) on the crystallinity, grain size and resistivity of LaNiO 3 thin films, and the PZT films grown on the LNO layers were studied. The results showed that the value of the resistivity of the LaNiO 3 thin films annealed in oxygen is only half of that obtained in air. The conductive mechanism of LaNiO 3 thin films was discussed..
Journal of Infrared and Millimeter Waves
- Publication Date: Aug. 01, 2003
- Vol. 22, Issue 4, 269 (2003)
MACHINE VISION BASED IR IMAGING SYSTEM DETECTION PERFORMANCE EVALUATION
[in Chinese], and [in Chinese]
On the basis of the analysis of IR imaging systems, a kind of IR imaging system detection performance model based on the machine vision is presented. Its fundamental theory, subsystem modules and the prediction methods of the detection performances are illustrated. The experimental results show that this performance moOn the basis of the analysis of IR imaging systems, a kind of IR imaging system detection performance model based on the machine vision is presented. Its fundamental theory, subsystem modules and the prediction methods of the detection performances are illustrated. The experimental results show that this performance model can make a good prediction for the detection performance of the target in complex background..
Journal of Infrared and Millimeter Waves
- Publication Date: Aug. 01, 2003
- Vol. 22, Issue 4, 273 (2003)
DEVELOPMENT OF IR MICROEMITTER
[in Chinese], [in Chinese], and [in Chinese]
IR microemitter with microbridge structure has been developed based on surface MEMS(Microelectromechanical Systems) technology. The microemitter is the key cell of resistor array dynamic IR scene generator. The microemitter generated IR radiation which the effective blackbody temperature is between 300K and 500K. It caIR microemitter with microbridge structure has been developed based on surface MEMS(Microelectromechanical Systems) technology. The microemitter is the key cell of resistor array dynamic IR scene generator. The microemitter generated IR radiation which the effective blackbody temperature is between 300K and 500K. It can meet the requirement of simulating MWIR(Medium Wave IR) and LWIR(Long Wave IR) radiation in hardware-in-the-loop simulation system..
Journal of Infrared and Millimeter Waves
- Publication Date: Aug. 01, 2003
- Vol. 22, Issue 4, 277 (2003)
RESEARCH ON THE ALGORITHM OF CROSS CALIBRATION ABOUT IRMSS ABORD ON CBERS-1
[in Chinese], [in Chinese], [in Chinese], [in Chinese], and [in Chinese]
The algorithm of cross calibration between IRMSS aboard on CBERS-1 and FY-1C or Landsat-7 ETM+ band 6 has been built. Two sets of cross calibration results between Landsat-7 ETM+ band 6 and IRMSS band 9, FY-1C band 4 and IRMSS band 9 were obtained. The bias of the same point controlled relative-err analysis is 1.2K, anThe algorithm of cross calibration between IRMSS aboard on CBERS-1 and FY-1C or Landsat-7 ETM+ band 6 has been built. Two sets of cross calibration results between Landsat-7 ETM+ band 6 and IRMSS band 9, FY-1C band 4 and IRMSS band 9 were obtained. The bias of the same point controlled relative-err analysis is 1.2K, and the average root-err between IRMSS band 6 and ETM+ band 9 is 1.6K..
Journal of Infrared and Millimeter Waves
- Publication Date: Aug. 01, 2003
- Vol. 22, Issue 4, 281 (2003)
A NOVEL FINGERPRINTENHANCEMENT METHOD WITH CURVE ACCUMULATION
[in Chinese], [in Chinese], and [in Chinese]
The fingerprintenhancement scheme based on Markov Random Field(MRF), which is applied to capture localstatistical regularities of ridges, is presented. Then the curve accumulation guided byridge direction and magnitude is repeated until statistics difference can be acquiredbetween fingerprint ridges and valleys. ExperiThe fingerprintenhancement scheme based on Markov Random Field(MRF), which is applied to capture localstatistical regularities of ridges, is presented. Then the curve accumulation guided byridge direction and magnitude is repeated until statistics difference can be acquiredbetween fingerprint ridges and valleys. Experimental results show that this approach canimprove the clarity of ridge and valley structures of fingerprint images and meanwhilepreserve the minutiae well..
Journal of Infrared and Millimeter Waves
- Publication Date: Jan. 01, 1900
- Vol. 22, Issue 4, 286 (2003)
INVESTIGATION ON SCATTERING AND RADIATION CHARACTERISTICS OF STEP DISCONTINUITY IN OPEN CIRCULAR CHIROWAVEGUIDE
[in Chinese], and [in Chinese]
Scattering and radiation characteristics of two step discontinuities in open circular chirowaveguide are investigated by a method which combines the multimode network theory with a rigorous mode matching procedure. Effect of chirality and geometric parameters of the step discontinuity on the scattering and radiation chScattering and radiation characteristics of two step discontinuities in open circular chirowaveguide are investigated by a method which combines the multimode network theory with a rigorous mode matching procedure. Effect of chirality and geometric parameters of the step discontinuity on the scattering and radiation characteristics is carefully discussed. The results given in the present paper are of practical significance in study of chiro elements..
Journal of Infrared and Millimeter Waves
- Publication Date: Aug. 01, 2003
- Vol. 22, Issue 4, 291 (2003)
LASER SOURCE OPTIMIZATION OF A PRACTICAL REALTIME TEMPERATURE MEASUREMENT SYSTEM
[in Chinese], [in Chinese], [in Chinese], [in Chinese], and [in Chinese]
Based on the Kirchhoff law, according to the relationships between various technical parameters (energy and wavelength of laser source, area of sensitive unit of detector, relative aperture of optical system, etc.) and main specifications (temperature resolving power, temperature measurement sensitivity, relative sensiBased on the Kirchhoff law, according to the relationships between various technical parameters (energy and wavelength of laser source, area of sensitive unit of detector, relative aperture of optical system, etc.) and main specifications (temperature resolving power, temperature measurement sensitivity, relative sensitivity and accuracy), an optimal laser source of the practical real-time temperature measurement system employing laser diode and LiTaO 3 pyroelectric detector is proposed. Experimental results of laser show that temperature measurement accuracy is suitable for requirements in the temperature range of 400℃～1200℃..
Journal of Infrared and Millimeter Waves
- Publication Date: Aug. 01, 2003
- Vol. 22, Issue 4, 297 (2003)
APPLICATION OF WAVEFORM ENTROPY METHOD FOR MOTION COMPENSATION OF MMW COSTAS FREQUENCY HOPPED RADAR
[in Chinese], [in Chinese], and [in Chinese]
A Costas frequency hopped signal is a high range resolution radar signal, motion compensation is the key technology to realize high range resolution. A waveform entropy method for motion compensation of Costas frequency hopped signal is studied in this paper, and optimization is made in the definition of waveform entroA Costas frequency hopped signal is a high range resolution radar signal, motion compensation is the key technology to realize high range resolution. A waveform entropy method for motion compensation of Costas frequency hopped signal is studied in this paper, and optimization is made in the definition of waveform entropy. Simulation results show that this method is feasible, insensitive to the quadrature demodulation error, and anti-noise to some extent..
Journal of Infrared and Millimeter Waves
- Publication Date: Aug. 01, 2003
- Vol. 22, Issue 4, 303 (2003)
RESEARCH OF AUTOMATED IMAGE REGISTRATION TECHNIQUE FOR INFRARED IMAGES BASED ON OPTICAL FLOW FIELD ANALYSIS
[in Chinese], [in Chinese], and [in Chinese]
A novel accurate automated registration technique for infrared images based on the optical flow field analysis was presented. The technique can be preformed with two processes. Firstly the registration of background area of two images is finished based on the computation of global optical flow field. Then a hierarchicaA novel accurate automated registration technique for infrared images based on the optical flow field analysis was presented. The technique can be preformed with two processes. Firstly the registration of background area of two images is finished based on the computation of global optical flow field. Then a hierarchical coarse-to-fine matching algorithm is used to extract the feature points of moving targets in two images. The registration of moving targets is finished using method of least squares which computes the transforming parameters of moving targets based on two set of feature points extracted. The simulation experiments for infrared images in some fields show that the method is accurate and robust to motion of scene..
Journal of Infrared and Millimeter Waves
- Publication Date: Aug. 01, 2003
- Vol. 22, Issue 4, 307 (2003)
SIMULATION AND FABRICATION OF 8mm INTEGRATED CHIP RECEIVER
[in Chinese], [in Chinese], and [in Chinese]
design method and the system fabrication process of 8mm integrated chip receiver with MCM-D are introduced. Agilent ADS software is used to receiver system simulation. Results of ADS simulation and measured values of receiver are given as measured gain reaches 20.2dB, sensitivity reaches-92dBm and noise figure reaches design method and the system fabrication process of 8mm integrated chip receiver with MCM-D are introduced. Agilent ADS software is used to receiver system simulation. Results of ADS simulation and measured values of receiver are given as measured gain reaches 20.2dB, sensitivity reaches-92dBm and noise figure reaches 5dB, respectively..
Journal of Infrared and Millimeter Waves
- Publication Date: Aug. 01, 2003
- Vol. 22, Issue 4, 313 (2003)
适于红外双色探测的光学系统AN OPTICAL SYSTEM FOR INFRARED TWO-COLOR DETECTOR
[in Chinese], [in Chinese], [in Chinese], [in Chinese], and [in Chinese]
A new optical system for infrared two-color detector was designed. It has a good performance for the dual band simulaneously. The wave front aberrations are less than one-fourth central wavelength, and the modulation transfer functions to are the diffraction limit. The system possesses higher transmitlance, compacted sA new optical system for infrared two-color detector was designed. It has a good performance for the dual band simulaneously. The wave front aberrations are less than one-fourth central wavelength, and the modulation transfer functions to are the diffraction limit. The system possesses higher transmitlance, compacted structures with fewer elements and lower requirements in manufacture..
Journal of Infrared and Millimeter Waves
- Publication Date: Aug. 01, 2003
- Vol. 22, Issue 4, 317 (2003)
© Copyright 2018-2021 | Chinese Laser Press. All Rights Reserved 沪ICP备15018463号-20