查询词典 immersion lens

Similarly, lens with high f-number have larger DOF than lens with low f-number.

景深是由几个因素影响，广角镜头通常比望远镜头有较大景深，高F值也有较大景深。

In my study, we use a 4F acoustic lens which f-number is 1.3 to set up a photoacoustic imaging system. With same axial and lateral magnification, 3D photoacoustic imaging system with 4F acoustic lens can detect photoacoustic signal distribution on object plane in real-time, and get the different axial distance signal to show the 3D photoacoustic image by different signal receiving time.

本研究采用相对孔径为1.3的4F声透镜，设计三维光声影像系统，利用4F声透镜景深范围内之轴向与横向放大倍率相等，即时性的重现物平面所发出的同调性光声讯号分布，并利用不同的接收时间来呈现不同深度距离的讯号成像，取得物平面上受测物的三维光声影像。

Compared to the germanium, a common material used in infrared field, chalcogenide glasses possess the characteristics of low-cost and the little value of dn/dt. Besides, it is amorphous glass, which is produced the spherical and aspheric lens by using a molding process instead of single-point-diamond turning. Thus the mass manufacture cost of infrared lens will drop obviously, the stability and consistency of product is guaranteed.

相对于红外领域常用的材料单晶锗，硫系玻璃不但具有低成本，折射率随温度变化小的特点，而且，由于它是非晶态材料，可以用精密的模压工艺来代替用于晶体材料的单点金刚石车削工艺，其批量加工的成本得到了大幅的降低，产品的稳定性，一致性也得到了明显的提高。

This is true for every super bright lens: in the viewfinder you see the depth of field of the lens at about f/4 or so.

这适用于每一个超明亮镜头：在取景器中看到的镜头深入实地的约2 / 4左右。

Then the scratches and spots on the field lens would be visible at the eye lens.

此时场镜上的划痕和小点会在接目镜中看见。

To improve the imaging quality of CCD camera and make the lens small in size,compact in structure,the wide field of view optical lens with the standard quadric surface and even aspheric surface was designed.

为提高CCD摄像机的成像质量，同时使镜头结构紧凑、小型化，在大视场光学镜头的设计中，引入标准二次曲面和偶次非球面。

In Bazin believes that the film is an ontological position first, and then is an aesthetic stance, the body is the point where the lens and the depth of field long lens, but also point to formal aesthetic montage.

在巴赞认为，电影首先是一种本体论立场，然后才是一种美学立场，这里的本体就是指向长镜头与景深镜头，而美学亦是指向形式化的蒙太奇。

It is found from the analytical expression that the truncation parameter, which is defined as the ratio between the waist of the Gaussian beam and the radius of the lens, has an important effect on the diffraction field distribution of the lens.

应用这个表达式研究了截断参数（透镜的半径与高斯光束束腰半径的比值）对透镜衍射场分布的影响。

The results show: when the eyes gaze at the 0° field of view, the lens can provide an 1-arcmin resolution. And Turning the eye and focusing on the 14° field of view, the lens can provide an 1.1-arcmin resolution.

MTF的评价结果显示：当眼睛注视0°视场时，系统达到1.1 arc minute的分辨率；当转动眼睛注视＋14°视场时，系统达到1.1 arc minute的分辨率。

Unlike the 28-70, it has a fixed rear lens element so the tendency for the lens to act as a "suction device" is eliminated. In fact, the element is fixed both for focusing and zooming, very neat and clever.

24-70 与 28-70 不同的地方，在於(24-70)有固定的后镜组，变焦跟对焦时都不会变动，不会有如同吸尘器一般的效果，是非常好的设计。

Alternatively, the con- trollers can use the synchronous rectifier itself or loss- less inductor current-sensing methods to provide overload protection with lower power dissipation.

另外，康威特罗勒斯可以使用同步整流器本身或亏损减少电感电流检测方法，以提供低功耗过载保护。

Mr. Dauber's other Schatz hangs in his home movie studio.

多伯把沙兹的另一件作品挂在家里的电影室。