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对卫星遥感探测上层大气风场的原理作了简介,综述了近年来探测大气风场所使用的基于多普勒频移和广角迈克尔逊干涉仪的WINDII、SWIFT、MIMI、WAMI、PAMI、ERWIN、DYNAMO的关键技术,包括WINDII的步进技术、SWIFT的红外辐射探测、WAMI的镜子四分技术、MIMI的6视场探测技术、PAMI的偏振态探测技术及火星大气探测的DYNAMO等关键技术,将这7种仪器的技术指标作了对比。文中提供了某些技术指标的来源公式,如大气风场探测器的两视场延迟时间、CCD阵列对地探测精度等公式的计算结果与实际符合得很好,最后对这类仪器的发展方向作了预测。 相似文献
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重新构造出N(N≥2)维各向同性谐振子的另外四类升降算子,计算了它们的矩阵元,给出了归一化系数的普适表示式. 相似文献
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阐述了“镀膜四面角锥棱镜(coating pyramid prism, CPP)”技术探测上层大气风场的原理,提出可以在四面角锥棱镜的4个面上分别按λ/4(λ波长)的步进光程差递增镀增透膜,同时获得一个干涉条纹中的4个强度值,实现上层大气风场的探测模式.对该模式下的相关参数进行了理论计算并得出结论:四面角锥棱镜的顶角必须大于24°、宽度为8mm的对称光束入射到CPP顶点能满足LF7玻璃上镀MgF2增透膜以实现大气风场探测的要 求.按9°×9°干涉仪视场和CCD4.5°×4.5°视场设计了干涉仪前后的光路,用CCD照相机并调 节定标光源Kr灯557.0nm到所需光束宽度进行了模拟实验,分别得到顶角为60°和90°的 两面镀膜棱镜在CCD上的两个干涉光斑,这两个光斑再复制即可获得CPP的4个干涉光斑,从 而证实了CPP技术探测上层大气风场的可行性.该模式发展了被动探测上层大气风场的光学遥 感探测技术.
关键词:
四面角锥棱镜
镀膜
上层大气风场
探测 相似文献
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大学物理课程体系、教学内容、教学方法改革的实践探索 总被引:16,自引:0,他引:16
面向21世纪高素质创新人才培养对大学物理课程的要求,在教学实践中,对大学物理课程体系、教学内容、教学方法的改革作了初步的探讨和尝试,并就改革的一些具体帮法进行了分析和总结,为教学改革的进一步深化提供有益的参考。 相似文献
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Grazing incidence optics(GIO) is the most important compound in an x-ray detection system; it is used to concentrate the x-ray photons from outer space. A nested planar GIO for x-ray concentration is designed and developed by authors in this paper; planar segments are used as the reflection mirror instead of curved segments because of the simple process and low cost. After the complex assembling process with a special metal supporter, a final circle light spot of φ12 mm was obtained in the visible light testing experiment of GIO; the effective area of 1710.51 mm2@1 ke V and 530 mm2@8 ke V is obtained in the x-ray testing experiment with the GIO-SDD combination, which is supposed to be a concentrating detector in xray detection systems. 相似文献
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Relationship between incident angle and dispersion in static large field of view polarization interference imaging spectrometer 下载免费PDF全文
The static large field of the view polarization interference
imaging spectrometer is based on the modified Savart polariscope.
There appears a dispersion between the ordinary ray and extraordinary
ray when light passes through the modified Savart polariscope. The
dispersion greatly influences the intensities and the results of the
interferogram and target image in the static large field of the view
polarization interference imaging spectrometer. At the same time,
the incident angle determines the dispersion. When the light goes
through the modified Savart polariscope, the dispersion occurs in
the left plate, the half-wave plate and the right plate of the
modified Savart polariscope. Using the extension of Snell's law, the
dispersion in the crystal is theoretically calculated and
numerically simulated separately. The relationship curve between
incident angle and the dispersion is obtained by simulation. 相似文献
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基于偏振阵列的偏振迈克耳孙风场探测干涉仪系统的理论研究 总被引:2,自引:0,他引:2
基于偏振阵列的偏振迈克耳孙风场探测干涉仪是一种新型的探测大气温度和风场速度的干涉仪.基于偏振干涉的原理,四个偏振方向分别相差45°的偏振片组成的偏振阵列紧贴于探测器前,由四面角锥棱镜出射的四束线偏振光分别经四个不同偏振方向的偏振片后,四个不同强度干涉图同时成像于探测器上,经过数据提取获得四个干涉强度值,进一步反演出大气温度和风场速度值.对以上干涉成像过程进行了模拟仿真,得到干涉图,经风速反演得到了与实际值一致的结果.具有结构简单稳定,测试精度高,利于快速变化的目标测试的优点. 相似文献