查询词典 bifocal

Starting from Collins integral,the focusing characteristics of Gaussian beams passing through a bifocal lens are studied.

从Collins公式出发，研究了高斯光束通过双焦透镜后的聚焦特性。

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如果是的话，我推荐这个网站给你： Zenni Optical ZenniOptical.com 为你在线出售时髦，漂亮的的眼镜，从框架到镜片都提供各种不同的样式，上面有一些样式的图片，你可以看一下。

The bifocus lens could produce images at the two independent focal length respectively and recovery the object's depth information according to the two bifocal images,which is the principle of depth estimating using bifocal lens.

成像物镜具有两个独立的焦距，通过对空间物体成像并进行分析可获取其深度信息，此即双焦测距的原理。

No one before had thought of bifocal glasses.

以前没人想过会有两个焦距的眼镜

Has a bifocal been designed for this type of lens?

是否为双焦设计？

His numerous scientific and practical innovations include the lightning rod, bifocal spectacles, and a stove.

他的众多的科学发明包括避雷针、双焦点的眼镜和暖炉

Alternatively, some people use varifocal or bifocal lenses in order to see objects clearly that are both close up and far away.

另外，有些人使用varifocal或双部位隐形眼镜，才能看到物体清楚，都是接近和远离。

Some manufacturers are also developing bifocal IOLS, which may eliminate the need in some patients for prescription glasses after surgery.

有的制造商在研究双焦点的人工晶体，这可能会让一些手术后需要用处方眼镜的患者不再需要眼镜。

Bifocal contact lenses are today available to correct presbyopia, a common problem in the over-40 age group.

今天是双部位隐形眼镜可矫正老花眼，一个共同的问题，在过去40岁年龄组。

At first the principle of bifocal imaging and it's precision influenced by calibrating precision of principal point are analyzed,and two invariants of principal point are found in the two bifocal images.And then based on the two invariants a novel bifocus depth-estimating algorithm is proposed to steer clear of the principal point calibration and improve the depth estimating precision.

本文首先分析了图像主点坐标标定对双焦测距精度的影响，找到了双焦图像中两种相对于主点坐标的不变量，进而提出了基于此不变量的双焦测距算法，避免了繁琐的标定环节并提高了算法精度。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。