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Variations in the intensity of the solar radiation are measured in the six spectral intervals of the multi-channel photometer: 350, 500, 650, 850, 1100, and 1500 nm, with the bandwidths being about 10% of the central wavelength of each interval.
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The RATAN-600 Zenith Field (RZF) catalog was obtained at the central wavelength of 7.6 cm, and contains 437 radio sources, virtually all of which have been identified with NVSS objects.
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This effect reduces unwanted variations in the central wavelength, as well as fluctuations of the delay time of the frequency-shifted soliton with respect to the input pulse.
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The tuning range of the laser has been found to be 45 nm around the central wavelength 1080 nm.
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By slightly tuning the central wavelength of the narrowband FBG, SLM lasing at 1549.658 or 1549.563 nm (corresponding to the two transmission peaks of the FBG-FPF) is achieved with a laser output power of ～4 mW, when the pump power is ～75 mW.
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The central wavelengths are respectively 1232.4 nm, 1372.8 nm and 1538.3 nm.
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We have constructed a three-wavelength Ti:sapphire femtosecond laser with an independent tunable wavelength (λ1) and two variable central wavelengths (λ2 and λ3) for use with the multi-excited photosystem II.
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Generally, the higher the dipole moments, the longer the central wavelengths of the dye.
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Six Dickey-john Instalab 600's were modified to analyze chlorophyll in ground rapeseed by replacing two standard near infrared filters with two filters having central wavelengths of 674 and 696 nm.
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Stars brighter than 10 mag, which will saturate the CCD, may be observed photometrically using the image wings, but the central wavelengths will be slightly shifted towards the red.
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| | A dual UV/IR double wavelength analyser has been developed for the simul-taneous determination of fluorine and hydrogen fluoride in gas. The analyser is composed of the tungsten lamp, the rotating chopper inlayedwith four narrow--band interference filters (2850, 4500, 2.45μm, 2.2μm), thethermistor detector PbS(IR), and photomultiplier(UV). There is a good linear relation between the output of the analyser and thepartial pressure of fluorine or hydrogen fluoride in the range of 0--10, 0--30,0--50, 0--100, ... | | 研制了紫外、红外两个双波长一体的氟-氟化氢分析仪。分析仪由卤钨灯光源,带有中心波长分别为2850A、4500A和2.45μm、2.2μm干涉滤光片的新光盘及PbS检测器(红外)和光电倍增管(紫外区)组成。该仪器的输出与氟或氟化氢的分压在0—10、0—30、0—50、0—100和0—200μmHg范围内有良好的线性关系,检测限可达0.3 mmHg。该仪器测最精度高、快速、稳定、操作简单,使用方便。该仪器已用于HF-F_2-Ar和HF-F_2-N_2等混合气体中氟和氟化氢的测定。 | | 文摘来源 | | A reflection chirped grating structure having continuously varying sawtooth groove profilers proposed. The result of analysis shows that the type of chirped grating is of very high diffraction efficiency. A concise formula, defined as the chirped function, is presented to describe the relation ship of chirped grating parameters. Finally, an optimization method for reaching at an image point at an arbitrary wavelength is given. | | 提出了一种具有连续变化槽角的反射式变周期光栅结构.通过分析证明其衍射效率有明显的提高.给出了用以描述周期光栅各参数之间的数学关系式,并将其定义为光栅调制函数.基于上述原理,提出了一种非中心波长下变周期光栅“象点”位置的优化设计方法。 | | 文摘来源 | | The paper described the green mirror we developed, its propertiesare: Its maximum reflectivity R_(nax)=95% at 540 nm, reflecting width is 60 nm,mean transmittance is 78% within short wavelength region and mean transmittanceis 82% within long wavelength region. These correspond to the opaerting requirem-ents in decorating illuminance. | | 本文叙述了我们制的绿色反光镜,其性能指标为:在中心波长540nm处R_(max)≥95%,反射带宽约为60nm,短波范围内平均透射率达78%,长波范围内平均透射率达82%。符合装饰照明使用要求。 | | 文摘来源 | | | | << 更多相关文摘 |
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中心波长
central wavelength
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