查询词典 concave lens

It is explained that focusing effects for the compound system was better than lens′ and the compound system focusing approach appropriate to crystal properties was discussed.

解释了该聚焦方法比单一薄透镜效果明显好的原因，并指出了这种聚焦方法的使用对象。

The X-ray compound lens is a novel optical device that focuses X-ray radiation by refraction effect.

X射线聚焦组合透镜是一种利用折射效应对 X射线辐射聚焦的新型元件。

The X-ray compound lens is a novel refractive X-ray optical device.

X射线组合透镜是一种利用折射效应对 X射线聚焦成像的新型元件。

The compound X-ray lens is a novel refractive X-ray optical device.

铜材料 X射线聚焦组合透镜是一种基于折射效应的 X射线聚焦元件。

Digital video camera with a compound lens.

镜头对准对岸的小码头。

Study of the 3-D focusing performances near focus for the compound X-ray lens .

X射线组合透镜近焦点处的三维聚焦性能研究。

A compound camera lens with a relatively high aperture .

带有相对高孔径的照相机复合镜头。

A combination of two or more such pieces, sometimes with other optical devices such as prisms, used to form an image for viewing or photographing.Also called compound lens

镜头：由两片或更多的透镜组成的联合体，有些还要加上其它的光学仪器，如棱镜，用来成像以便观看或摄影也作 compound lens

In the second chapter, during the study of compound x-ray refractive lenses, diffraction function of compound lens is derived in the light of refraction and absorption effect and the design theory of X-ray is deduced using diffraction theory in connection with the characteristic of X-ray band.

在第二章X射线聚焦组合透镜的研究中，针对X射线波段的特性，综合考虑折射和吸收效应得出组合透镜的衍射屏函数，利用衍射理论推导出X射线聚焦组合透镜的设计理论并进行结构设计与微细加工制作技术研究。

We firstly studied the material feature in X-ray band. Base on this, we defined the diffractive screen function. Subsequently, by using diffraction theory, it studied the focus performance and transmission efficiency of X-ray compound lens.

1理论研究。首先研究了X射线波段的材料特性，并据此得出了物面的衍射屏函数，然后利用衍射理论研究了X射线组合透镜的聚焦性能和透射效率。

The researchers based their findings on an analysis of blood samples collected between 1974 and 1986 as part of a large study in Malmo, Sweden, that included 161 men who eventually developed advanced prostate cancer.

研究人员称，&50岁或50岁之前进行PSA检测能够有效地预测25年后是否发生前列腺癌，这表明，有可能利用早期PSA检测……因此，高危男性是重点筛查对象。&

CLAIRE: You don't believe me.

你不相信我。