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near infrared
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  near infrared
The acousto-optic spectrometer of the near infrared range, which is a part of the spectrometer SPICAM onboard the Mars-Express spacecraft, began to operate in the orbit of Mars in January 2004.
      
The spectral features of leaf reflectance in the visible and near infrared regions are briefly considered.
      
The sole spectral feature in the near infrared, observed at some longitudes, is a possible pyroxene absorption band at 0.95 μm, which can be used to investigate the abundance and distribution of FeO in the regolith.
      
The near infrared is an optimum spectral range for detection.
      
This image clearly exhibits both small-and large-scale structure in the distribution of deviations of the plane of polarization from its theoretical direction for coronal emission in the near infrared (570-800 nm).
      
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The effect on ~(21)P~+-implanted Si layers with photoacoustic spectroscopy in near-infrared wavelength range is reported.The correlations between the amplitude of pho-toacoustic signal and the implanted dose at levels from 1×10~(12) to 1×10~(15)cm~(-2) are abta-ined and the information at implanted dose level as low as 5×10~(11) cm~(-2) is also effective-ly detected.The photoacoustie signal increases significantly with the implanted dose atlower levels (1×10~(12) to 5×10~(13)cm~(-2)).Therefore,the...

The effect on ~(21)P~+-implanted Si layers with photoacoustic spectroscopy in near-infrared wavelength range is reported.The correlations between the amplitude of pho-toacoustic signal and the implanted dose at levels from 1×10~(12) to 1×10~(15)cm~(-2) are abta-ined and the information at implanted dose level as low as 5×10~(11) cm~(-2) is also effective-ly detected.The photoacoustie signal increases significantly with the implanted dose atlower levels (1×10~(12) to 5×10~(13)cm~(-2)).Therefore,the photoacoustic spectroscopy is aneffective method for studying damaged layers induced by ion implantation.On theother hand,it is considered that photoacoustic techniques have the prospect of becominga noncontact,rapid and nondestructive method for measuring implanted dose in siliconeven at low dose levels.

本文报道用光声谱法在近红外波段研究硅单晶中~(31)P~+离子注入效应,得到了注入剂量为10~(12)cm~(-2)-10~(15)cm~(-2)范围内的光声信号幅值随注入剂量变化的关系.对于先经退火后进行离子注入的样品,其剂量低到 5×10~(11)cm~(-2)的离子注入效应也能被检测到.在1×10~(12)-5 × 10~(13)cm~(-2)低剂量范围内,光声信号明显地随注入剂量而增加.因此,光声谱法是研究离子注入造成的晶格损伤的有效手段,有希望发展成为硅中离子注入剂量的无接触、快速、非破坏性的测量方法.

A near infrared hygrometer is desoribed in this paper, which measures the column density of water vapour in the earth atmosphere. It can be used with either the Sun or the Moon as a radiation source. Then the integral column density can be obtained by means of measuring the residual intensity in a water vapour absorption band of solar spectrum on earth surface. The instrument is easy to use and handle, and useful in infrared astronomical site-selection. And it can also be used for monitoring of variation...

A near infrared hygrometer is desoribed in this paper, which measures the column density of water vapour in the earth atmosphere. It can be used with either the Sun or the Moon as a radiation source. Then the integral column density can be obtained by means of measuring the residual intensity in a water vapour absorption band of solar spectrum on earth surface. The instrument is easy to use and handle, and useful in infrared astronomical site-selection. And it can also be used for monitoring of variation of the atmosphere water vapour.

本文所述便携式近红外大气水蒸气柱密度计,可以用太阳或月亮作辐射源,通过对吸收线剩余强度的测量来确定从地面到大气外辐射路径上水蒸气的积分柱密度。仪器携带和使用方便,工作可靠,是红外天文选址和大气水蒸气含量监示的有用工具。

In the light of the measurement data in real atmosphere, the attenuation properties of near infrared radiation of GaAs LED propagating through fog are discussed. Comparisons of the attenuation coefficient with the simultaneously observed meteorological visibility show that there is a close relationship between them. This conclusion is proved by the theoretical calculation.

本文根据大气实测资料,讨论了GaAs近红外辐射在雾中的衰减特性。通过与同时观测的气象能见度比较,证明GaAs辐射的衰减与大气的能见度有密切的关系。这个结论得到了理论计算的证实。

 
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