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Mathematical modelling of the apparatus channel of an infrared remote sensing system 红外遥感系统设备信道的数学建模
Infrared physics Pub Date : 1993-10-01 DOI: 10.1016/0020-0891(93)90079-M
E.S. Ferdinandov, V.I. Tsanev
{"title":"Mathematical modelling of the apparatus channel of an infrared remote sensing system","authors":"E.S. Ferdinandov,&nbsp;V.I. Tsanev","doi":"10.1016/0020-0891(93)90079-M","DOIUrl":"10.1016/0020-0891(93)90079-M","url":null,"abstract":"<div><p>This paper presents a mathematical model of the apparatus channel of an infrared remote sensing radiometric system. The latter comprises: (1) the sounded object. This may be a medium, such as a cloud or a dense aerosol layer caused by a temperature inversion; (2) background radiation; (3) the atmospheric channel, or the medium where the signal radiation from the sounded object and the background radiations propagate; (4) the apparatus channel or the infrared radiometer itself. The system described is useful for investigating, measuring or controlling objects and media. The apparatus channel modelled is proposed as a lock-in detector. The joint action of all types of noise due to the stochastic nature of the infrared radiation or to the optoelectronic and electronic conversions is discussed. The final results allow calculation of the apparatus channel output signal-to-noise ratio.</p></div>","PeriodicalId":81524,"journal":{"name":"Infrared physics","volume":"34 5","pages":"Pages 457-466"},"PeriodicalIF":0.0,"publicationDate":"1993-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0020-0891(93)90079-M","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"53081941","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Diffraction grating with rectangular grooves exceeding 80% diffraction efficiency 具有超过80%衍射效率的矩形凹槽的衍射光栅
Infrared physics Pub Date : 1993-10-01 DOI: 10.1016/0020-0891(93)90080-Q
H. Haidner , P. Kipfer , J.T. Sheridan , J. Schwider , N. Streibl , M. Collischon , J. Hutfless , M. März
{"title":"Diffraction grating with rectangular grooves exceeding 80% diffraction efficiency","authors":"H. Haidner ,&nbsp;P. Kipfer ,&nbsp;J.T. Sheridan ,&nbsp;J. Schwider ,&nbsp;N. Streibl ,&nbsp;M. Collischon ,&nbsp;J. Hutfless ,&nbsp;M. März","doi":"10.1016/0020-0891(93)90080-Q","DOIUrl":"10.1016/0020-0891(93)90080-Q","url":null,"abstract":"<div><p>A novel design for a surface relief grating with rectangular grooves is presented. The first reflected diffraction order shows experimentally 84% diffraction efficiency for a metallic grating. The required binary surface relief can be manufactured by using one single microlithographic fabrication step similar to standard processes in microelectronics. Each period of the grating consists of a subwavelength “minilattice” with a variable duty cycle. A theoretical model of the structure is presented and compared to measurements at 10.6 μm wavelength. Applications ranging from deflectors, polarizing beam splitters, variable attenuators to general diffractive components such as kinoforms for laser beam shaping are proposed.</p></div>","PeriodicalId":81524,"journal":{"name":"Infrared physics","volume":"34 5","pages":"Pages 467-475"},"PeriodicalIF":0.0,"publicationDate":"1993-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0020-0891(93)90080-Q","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"53081956","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 29
An operating regime based on switching effects for photodetectors of Pb1−xSnxTe(in) MBE films 基于Pb1−xSnxTe(in) MBE薄膜光电探测器开关效应的工作机制
Infrared physics Pub Date : 1993-08-01 DOI: 10.1016/0020-0891(93)90069-J
B.A. Akimov , L.I. Ryabova , V.N. Shumskiy , N.I. Petikov
{"title":"An operating regime based on switching effects for photodetectors of Pb1−xSnxTe(in) MBE films","authors":"B.A. Akimov ,&nbsp;L.I. Ryabova ,&nbsp;V.N. Shumskiy ,&nbsp;N.I. Petikov","doi":"10.1016/0020-0891(93)90069-J","DOIUrl":"10.1016/0020-0891(93)90069-J","url":null,"abstract":"<div><p>Pb<sub>1−<em>x</em></sub>Sn<sub><em>x</em></sub>Te(In) (<em>x</em> = 0.20) MBE films have been prepared on BaF<sub>2</sub> substrates. The characteristics of resistivity relaxation under the combined effect of a pulsed electric field and IR illumination have been investigated. We have shown that the films can be used as rather fast-response photodetectors operating in a regime of periodic accumulation and quenching of the signal.</p></div>","PeriodicalId":81524,"journal":{"name":"Infrared physics","volume":"34 4","pages":"Pages 375-378"},"PeriodicalIF":0.0,"publicationDate":"1993-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0020-0891(93)90069-J","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"53082325","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 12
A new pulsed FIR laser line in CH3F 一种新的CH3F脉冲FIR激光线
Infrared physics Pub Date : 1993-08-01 DOI: 10.1016/0020-0891(93)90065-F
C. Nieswand, M.R. Siegrist, M. Urban
{"title":"A new pulsed FIR laser line in CH3F","authors":"C. Nieswand,&nbsp;M.R. Siegrist,&nbsp;M. Urban","doi":"10.1016/0020-0891(93)90065-F","DOIUrl":"10.1016/0020-0891(93)90065-F","url":null,"abstract":"<div><p>A new laser line of CH<sub>3</sub>F at 676 μm has been found. The gas was pumped by a powerful pulsed CO<sub>2</sub> laser at 9P20. The line could be observed simultaneously with the 496 μm line and can be assigned to a rotational transition in the 2ν<sub>3</sub> band which is stepwise pumped from the vibrational ground state via the ν<sub>3</sub> = 1 state.</p></div>","PeriodicalId":81524,"journal":{"name":"Infrared physics","volume":"34 4","pages":"Pages 351-355"},"PeriodicalIF":0.0,"publicationDate":"1993-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0020-0891(93)90065-F","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"53082282","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Carrier lifetime in ZnxCdyHg1−x−yTe: Calculation and experiment ZnxCdyHg1−x−yTe中的载流子寿命:计算与实验
Infrared physics Pub Date : 1993-08-01 DOI: 10.1016/0020-0891(93)90066-G
N.L. Bazhenov, A.M. Andrukhiv, V.I. Ivanov-Omskii
{"title":"Carrier lifetime in ZnxCdyHg1−x−yTe: Calculation and experiment","authors":"N.L. Bazhenov,&nbsp;A.M. Andrukhiv,&nbsp;V.I. Ivanov-Omskii","doi":"10.1016/0020-0891(93)90066-G","DOIUrl":"10.1016/0020-0891(93)90066-G","url":null,"abstract":"<div><p>This paper presents analytical expressions for energy gap, dielectric constants, and intrinsic carrier concentration vs temperature and composition of quaternary solid solutions Zn<sub><em>x</em></sub>Cd<sub><em>y</em></sub>Hg<sub>1−<em>x</em>−<em>y</em></sub>Te, with an energy gap 0.1 &lt; <em>E</em><sub>g</sub> &lt; 0.4 eV over a temperature range 80 &lt; <em>T</em> &lt; 290 K. The expressions were used to calculate the lifetime dominated by band-to-band radiative processes and two Auger processes. The calculated values were compared with the experimental data obtained on LPE fabricated samples. The lifetime in most of the samples was shown to be determined only by the above-mentioned recombination mechanisms at temperatures above 77 K.</p></div>","PeriodicalId":81524,"journal":{"name":"Infrared physics","volume":"34 4","pages":"Pages 357-364"},"PeriodicalIF":0.0,"publicationDate":"1993-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0020-0891(93)90066-G","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"53082296","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 8
Application of interferometric enhancement to self-absorbing thin film thermal IR detectors 干涉增强技术在自吸收薄膜热红外探测器中的应用
Infrared physics Pub Date : 1993-08-01 DOI: 10.1016/0020-0891(93)90070-N
K.C. Liddiard
{"title":"Application of interferometric enhancement to self-absorbing thin film thermal IR detectors","authors":"K.C. Liddiard","doi":"10.1016/0020-0891(93)90070-N","DOIUrl":"10.1016/0020-0891(93)90070-N","url":null,"abstract":"<div><p>Uncooled thermal IR detectors require a suitable absorbing mechanism in order to achieve efficient radiation capture. For bulk detector materials such as ferroelectric ceramics this mechanism may be a broad-band absorber in the form of a metallic black layer, or a thin-film optical interference filter tuned for maximum absorption at the desired wavelength, deposited onto the surface of the detector.</p><p>A thin metal film having a sheet resistance of 189 Ω per square can absorb 50% of incident radiation, and is employed in the metal film resistance bolometer detector and Golay cell. In this paper an interferometric technique for thin film thermal detectors is described, whereby a thermally sensitive material in the form of a semiconductor or dielectric layer becomes an integral component of a 3-layer absorber stack. The theory of this absorber structure is reviewed and compared with experimental data. It is shown that an effective absorption of 90% can be achieved over the waveband 8–13μm for a blackbody radiation source at 300 K temperature.</p></div>","PeriodicalId":81524,"journal":{"name":"Infrared physics","volume":"34 4","pages":"Pages 379-387"},"PeriodicalIF":0.0,"publicationDate":"1993-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0020-0891(93)90070-N","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"53082337","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 71
Forthcoming conferences 即将到来的会议
Infrared physics Pub Date : 1993-08-01 DOI: 10.1016/0020-0891(93)90077-K
{"title":"Forthcoming conferences","authors":"","doi":"10.1016/0020-0891(93)90077-K","DOIUrl":"https://doi.org/10.1016/0020-0891(93)90077-K","url":null,"abstract":"","PeriodicalId":81524,"journal":{"name":"Infrared physics","volume":"34 4","pages":"Page 444"},"PeriodicalIF":0.0,"publicationDate":"1993-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0020-0891(93)90077-K","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136543251","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Tunable InSb detectors under uniaxial and hydrostatic pressure 单轴和静水压力下可调InSb探测器
Infrared physics Pub Date : 1993-08-01 DOI: 10.1016/0020-0891(93)90064-E
R. Bischof, I. Maran, W. Scidenbusch
{"title":"Tunable InSb detectors under uniaxial and hydrostatic pressure","authors":"R. Bischof,&nbsp;I. Maran,&nbsp;W. Scidenbusch","doi":"10.1016/0020-0891(93)90064-E","DOIUrl":"10.1016/0020-0891(93)90064-E","url":null,"abstract":"<div><p>We report on n-InSb photoconductive detectors, which are either mounted on different substrates (metals and synthetic materials) or embedded in a special glue. If these detectors are cooled to 4.2 K, the different coefficients of expansion provide either a uniaxial or a hydrostatic pressure. This pressure causes a shift of the resonances (for the mounted detectors up to 5.5%, for the embedded detector 5.8% at 2.3 T) and a freeze out of electrons, which results in a decrease of the cyclotron resonance (CR) signal in comparison to the impurity cyclotron resonance (ICR) signal for the embedded detector.</p></div>","PeriodicalId":81524,"journal":{"name":"Infrared physics","volume":"34 4","pages":"Pages 345-350"},"PeriodicalIF":0.0,"publicationDate":"1993-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0020-0891(93)90064-E","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"53081781","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Influence of wind on the infrared radiance statistics of vegetation canopies 风对植被冠层红外辐射统计的影响
Infrared physics Pub Date : 1993-08-01 DOI: 10.1016/0020-0891(93)90068-I
Guoquan Dong, Zhengzhi Li
{"title":"Influence of wind on the infrared radiance statistics of vegetation canopies","authors":"Guoquan Dong,&nbsp;Zhengzhi Li","doi":"10.1016/0020-0891(93)90068-I","DOIUrl":"10.1016/0020-0891(93)90068-I","url":null,"abstract":"<div><p>A simple method to calculate the statistical distribution of the vegetation-canopy radiative temperature is presented, based on the heat-balance equation of the vegetation canopy and the assumption that the bulk stomatal thermal resistance and short-wavelength absorption coefficients are random, uncorrelated variables with normal distribution densities. The distribution is found as a function of local meteorological factors. The influence of wind speed on the statistical nature of the vegetation-canopy radiance is studied in detail. A comparison between our theoretical results and previous experiments cited in the literature is also presented.</p></div>","PeriodicalId":81524,"journal":{"name":"Infrared physics","volume":"34 4","pages":"Pages 371-374"},"PeriodicalIF":0.0,"publicationDate":"1993-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0020-0891(93)90068-I","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"53082312","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
Polarization modulation in an optically-pumped far-infrared laser 光抽运远红外激光器的偏振调制
Infrared physics Pub Date : 1993-08-01 DOI: 10.1016/0020-0891(93)90073-G
S.L. Prunty, H.M. Mansfield, F.D. O'Shea
{"title":"Polarization modulation in an optically-pumped far-infrared laser","authors":"S.L. Prunty,&nbsp;H.M. Mansfield,&nbsp;F.D. O'Shea","doi":"10.1016/0020-0891(93)90073-G","DOIUrl":"10.1016/0020-0891(93)90073-G","url":null,"abstract":"<div><p>Measurements performed on intracavity polarization modulation in an optically-pumped far-infrared laser are presented. The experimental work is a preparatory first step towards the development of a polarimeter diagnostic system for plasma physics applications. The present system utilizes a CO<sub>2</sub> laser whose output polarization state is modulated using a CdTe crystal placed within a sinusoidal magnetic field. The corresponding polarization modulated amplitude of the far-infrared output is determined, and the results obtained are in good agreement with the Verdet coefficient of CdTe previously reported.</p></div>","PeriodicalId":81524,"journal":{"name":"Infrared physics","volume":"34 4","pages":"Pages 415-419"},"PeriodicalIF":0.0,"publicationDate":"1993-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0020-0891(93)90073-G","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"53082366","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
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