They have a single refractive index and so do not scatter light, so making the wings transparent.
它们有单一的发射率以至于不会散光，使得翅膀是透明的。
A refractive defect of a lens or other optical system that prevents light rays from converging at a single point resulting in a blurred or imperfect image.
散光有折射缺陷的透镜或其它光学系统，阻碍光线汇聚于一个焦点，形成一个模糊或不完全的图象。
Then, the dispersion of the multi-clad fiber is obtained by solving the propagation constant and the equivalent refractive index of single-clad fiber which is equal to multi-clad fiber.
通过将多包层光纤等效为阶跃光纤，求等效阶跃光纤的传播常数与等效折射率，求得多包层光纤的色散。
New mode for single scattering "Raytraced (refractive)" for rendering transparent objects in VRayFastSSS2;
新模式单一散射“Raytraced （折射） ”渲染透明物体VRayFastSSS2 ；
The sensor head of fusion fiber-optic single-point liquid-level sensor is investigated experimentally and theoretically in this paper, which is sensitive to the refractive index of surrounding media.
本论文从理论和实验上对周围介质折射率敏感的触点式熔接型光纤液位传感器的传感头进行了研究。
By adjusting the difference of refractive index of the double layer film, single mode operation can be realized with a certain waveguide thickness.
通过改变外延生长工艺来调节两层薄膜的折射率，可在一定波导的厚度范围内实现单模传输。
By adjusting the difference of refractive index of the double layer film, single mode operation can be realized with a certain waveguide thickness.
通过改变外延生长工艺来调节两层薄膜的折射率，可在一定波导的厚度范围内实现单模传输。
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