消光系数

The analysis shows that the reflection spectrum is the multiple beams interference, and the coupling ratio is similar to the reflection coefficient of Fabry-Perot cavity. The larger the ratio is, the finer the extinction ratio is and the narrower the full-width at half maximum will be.

分析表明器件具有法布里－珀罗腔干涉仪的特点，耦合器的耦合比系数类似于法布里－珀罗腔的反射率，耦合比系数越大，输出光谱半高全宽度越窄，消光比越好。

Optical parameters of GaInP were measured by using null ellipsometric spectrum method in the visible light region at room temperature The dependencies of refractive index and absorption coefficient for three samples on the energy of photons were obtained, and the result was analyzed and discussed The positions of energy gap of three samples were give

利用消光式椭圆偏振光谱法，在室温下可见光区对光电子材料镓铟磷的光学参数进行了测量，得到该材料的折射率和吸收系数随光子能量的变化关系曲线，并对结果进行了分析和讨论，给出了镓铟磷带隙的位

We calculated the main effective second order nonlinear optical coefficients of the 〓 quasperiodic superlattice, analyzed the relationship between them and the quasi-periodic structure parameters, studied the extinction phenomenon and the extinction rules in quasi-periodic structure, standardized the expression of frequency conversion in homogenous crystal, periodic and quasi periodic superlattice crystal.

计算了〓准周期超晶格的有效二阶非线性系数，研究了它与准周期各结构参数之间的关系，分析了准周期结构中的消光规律，统一了频率转移效应在均匀材料、周期超晶格和准周期超晶格中的表述。

The major research includes the following three points. First, using finite element method, the influence factors on propagation properties for PMF couplers are analyzed, including the shape of coupler cross-section, the taper of coupler bipyramidal and the angle deviation of the birefringent axes.

基于热-结构-电磁多物理场耦合有限元方法，分析了保偏光纤耦合器的传输特性和耦合系数在熔锥区的变化规律，从而求解耦合模方程，得到偏振光经过耦合器后的光功率分布，继而对保偏光纤耦合器的性能参数分光比、消光比及附加损耗进行理论分析。

The sky brightness and the extinction coefficient in .

综述对丽江高美古的视宁度、天光亮度、消光系数进行观测的原理、仪器、观测方法和结果。

To seek a fast and accurate method for determining the light transmission rate and extinction coefficient.

寻求快速准确确定各种农林植物冠层透光率及其随时间变化规律的方法，以及通过冠层分析确定农林植物冠层消光系数的方法。

Should the choice extinction coefficient small material, and the period number of photonic crystal can't be enough big.

设计光子晶体滤波器时，应选择消光系数尽可能小的材料，并且光子晶体的周期数不宜大。

It is difficult to determine gauge point and calibration value in extinction coefficient inversion of airborne lidar that detects in low altitude.

进行低空探测的机载激光雷达消光系数反演存在着标定点选取和标定值确定两大困难。

Fernald iterative backward integration method can find gauge point and calibration value for extinction coefficient inversion without other auxiliary equipment when airborne lidar is used for low altitude detection.

Fernald迭代后向积分法能够在不利用其它辅助设备的情况下，找到进行低空探测机载激光雷达消光系数反演所需的标定点和标定值。

By establishing a model based on the law of infrared radiation transmission in atmosphere and the characteristics of infrared imaging system for the apparent contrast between the target and the background, and analyzing the model over two wavebands to formulate the distance measuring formula and the distance resolving power formula, a passive distance measurement method is proposed for aerial point target distance measurement.

提出了对空中点目标进行被动测距的方法。基于红外辐射在大气中的传输规律和红外成像系统的特性，建立了目标和背景的表观对比度模型。通过对两个波段上对比度模型的分析，推导出了测距公式和距离分辨率公式。理论分析表明，只要得到大气在两个波段上的消光系数，通过测量目标在两个波段、两个时刻上的目标表观对比度，即可计算得到目标距离和目标径向速度，而距离分辨率则取决于系统的对比度探测能力及相关参数。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。