When viewing extended objects, the apparent brightness seen in the eyepiece is a function only of aperture and magnification, it is not related to focal ratio.
当观察扩展光源时，目镜中所看到的亮度只跟孔径和放大率有关，它跟焦比并没有关系。
As a functional material or filling are need higher content brightness narrowly particle size distribution and radius-thickness ratio.
云母作为功能材料或填料都需要高纯度、细的粒度和窄的粒度分布、高白度和高径厚比。
Its advantages are discarding thick and heavy cover glass, high utilization ratio of energy, high brightness of refraction image, easy to making plane frame of hologram for display and easy to carry.
该法优点是不需要厚重玻璃衬板，光能利用率高，重现像亮，易于把全息图制成平面一体化构架，便于携带。
By selecting the phosphor, silicon and mixture ratio, high-power white LED with high brightness and low attenuation is prepared, and the color rendering index (CRI) reaches 95.
通过甄选荧光粉、硅胶以及配比，制备出显色指数(CRI)为95的高亮度、低衰减的大功率白光led。
By selecting the phosphor, silicon and mixture ratio, high-power white LED with high brightness and low attenuation is prepared, and the color rendering index (CRI) reaches 95.
通过甄选荧光粉、硅胶以及配比，制备出显色指数(CRI)为95的高亮度、低衰减的大功率白光led。
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