搜索结果: 1-10 共查到“光学工程 NIR”相关记录10条 . 查询时间(0.042 秒)
Method for Improving the Lateral Resolution of Near-Infrared (NIR) Single Optods: Application to Subcutaneous Vein Detection and Localization
Reflectance Measurements Photon Migration Optical Diagnosis Fiber Probe Design
2013/1/30
NIR backscattering measurements using single source-detector optical probe (optods) can detect absorption areas within deep tissue layer. However, such optods, are characterized by large separation di...
VIS/NIR高光谱成像在中国云冈石窟砂岩风化状况分布研究中的进展
高光谱 云冈石窟 粉状风化
2012/4/11
云冈石窟大部分雕凿在长石石英砂岩上，因受环境、岩性等因素影响，目前风化状况严重，其中主要为粉状风化。基于高光谱成像技术研究云冈石窟砂岩风化状况的整体有效评估方式，采集目标物400～1 000 nm的高光谱数据，采用对数残差法进行归一化处理，参照归一化处理后的反射率数据，按照这区间的反射率分布范围将风化程度分为强风化和弱风化。同时在envi平台下对砂岩的风化状况分布进行分级可视化表述。将可视化结果与...
基于舌诊NIR反射光谱血清总蛋白含量的无创测量
近红外反射光谱 舌诊 血清总蛋白(TP) BP神经网络 偏最小二乘(PLS)
2012/8/17
采用舌诊近红外反射光谱对人体血清总蛋白(TP)含量进行无创检测。采集58例舌尖反射光谱进行反射率归一化并记录相对应的血清总蛋白生化分析值，将样本分为训练集和预测集，运用主成分分析结合BP神经网络法和偏最小二乘算法分别建立预测模型。主成分分析结合BP神经网络模型对预测集进行预测，平均相对误差为7.35%，均方根误差为3.069 1 g·L-1，相关系数为0.902 1。偏最小二乘模型对预测集进行预测...
High Refractive Index Bi2O3-B2O3-TeO2 Glass with High Visible-NIR Transmittance
Fiber materials Optical properties
2015/6/4
We have newly developed Bi 2 O 3 -B 2 O 3 -TeO 2 glass system. This glass shows high transmittance in visible and near-IR wavelength, in spite of their high refractive index and optical nonlinearity.
Energy transfer from Cr3+ to Nd3+ and NIR luminescence of Nd3+ in lead borate glasses
lead borate glasses Cr3+ and Nd3+ ions
2011/5/5
Energy transfer processes from Cr3+ to Nd3+ and NIR luminescence of Nd3+ ions at 1.06 μm in Cr–Nd co-doped lead borate glasses have been investigated. The spectroscopic investigation indicates that Cr...
土壤全氮田间Vis/NIR光谱测定方法研究
全氮 Vis/NIR光谱 相对变换方法
2009/4/24
应用Vis/NIR光谱直接测定原始土壤属性具有重要的研究和应用价值。选取我国中部水稻土和潮土共103个土样，对比分析了两种土壤在田间环境下的湿态(Rw)和干态(Rd)光谱特征。采用相对变换光谱方法对湿态光谱进行了处理，结果表明该方法能够有效降低土壤水分的干扰和消除部分噪声，得到的变换光谱(Rn)与干态光谱在信息量和特征方面具有很高的相似度。以此建立了土壤TN的PLS回归估计模型，检验结果表明，Rn...
NIR—2000型近红外光谱技术的开发
近红外光谱技术 NIR—2000型
2008/4/19
NIR-2000近红外光谱仪结合分析的需要,经过反复论证、研制、开发及修正,目前已小批量生产。经过全过程的实践,使我们对于分析仪器的开发有了一些新的体会。
Carbon dioxide detection using NIR diode laser based wavelength modulation photoacoustic spectroscopy
photoacoustic spectroscopy NIR diode laser
2011/5/5
A photoacoustic sensor using a laser diode emitting near 1573 nm in combination with a dual-microphone resonant photoacoustic cell has been developed for carbon dioxide trace gas analysis at atmospher...
Carbon dioxide detection using NIR diode laser based wavelength modulation photoacoustic spectroscopy
photoacoustic spectroscopy NIR diode laser
2011/5/5
A photoacoustic sensor using a laser diode emitting near 1573 nm in combination with a dual-microphone resonant photoacoustic cell has been developed for carbon dioxide trace gas analysis at atmospher...
Energy transfer from Cr3+ to Nd3+ and NIR luminescence of Nd3+ in lead borate glasses
lead borate glasses Cr3+ and Nd3+ ions
2011/5/5
Energy transfer processes from Cr3+ to Nd3+ and NIR luminescence of Nd3+ ions at 1.06 μm in Cr–Nd co-doped lead borate glasses have been investigated. The spectroscopic investigation indicates that Cr...