lens focus的例句大全

The acoustic lens focus system has many strong points, such as: ease of operation, structure simple, diverse shape and cheap of sound material and widely applied in the clinical medicine.

声透镜聚焦系统由于其操作方便、结构简单、形状多样、折声材料便宜等方面的优点而在临床医学中被广泛应用。

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Error of the Non-ideal Thin Convex Lens Focus Measures

非理想薄凸透镜焦距测量的误差

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Many ultrasonic treatment systems produced by The Chongqing HIFU Company are acoustic lens focus system.

重庆海扶公司生产的许多超声治疗系统，都采用的是声透镜聚焦系统。

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the thermal lens focus of the end-pumped nd ∶ yag laser

LD端面泵浦Nd∶YAG激光器中的热透镜焦距

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Research on Open Circuit Voltage of Solar Cell Under the Modulation of Lens Focus Position

透镜焦点位置调制太阳电池开路电压的研究

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When the distance between Gauss beam waist of object and lens is farther than the lens focus, and the lens focus is minimum;

即当物方高斯光束束腰离透镜的距离l远大于透镜焦距f，f为极小值；

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Or when the distance is near to zero, and the Rayleigh distance is farther than the lens focus, the less focalized waist can be obtained.

或l接近于零，瑞利距离Z0远大于透镜焦距时，能够获得较小的聚焦束腰。

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Annular Focus System of Laser Combined by a Spherical Lens and Two Mutually Complemented Axicons

一种新型激光环形聚焦系统的研究

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The Ache: In presbyopia, the eye's lens loses elasticity with age. The ability to focus on near objects deteriorates, resulting in the need for reading glasses.

病痛：老花眼的成因是，眼睛的晶状体随年龄增长而失去弹性，聚焦近处物体的能力减弱，因此需要佩戴老花镜。

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The handling of errors in measuring the focus of thin lens

薄透镜焦距测量中的误差及处理

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We must design the ratio of the source beam size and aperture of object lens reasonably to assure energy matching ratio ( EMR) and to achieve smaller size of focus point and reasonable focus depth.

必须合理地确定光源的光束口径与光盘物镜孔径比值，才能保证其光能量耦合效率，并获得较小的光斑尺寸和合理的焦深。

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Design, making and test of super short-focus and wide-angle CID TV lens

超短焦距广角CID电视镜头的设计、制造与检测

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The effects of spherical aberration on measuring focus of thin convex lens with object distance image distance method

球差对物距像距法测薄凸透镜焦距的影响

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An auto measuring system of aerial camera lens is presented, which substitutes linear array CCD sensor for reading microscope to measure the focus of aerial camera lens.

提出了一种以线阵CCD固态传感器取代读数显微镜的航空相机镜头焦距测量系统。

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But beam quality of slow axis is easily affected by space burned hole, self-focusing and thermal lens effect, which lead to big slow axis divergent angle under high output power.

然而由于其慢轴方向输出光束质量极易受到空间烧孔、自聚焦、热透镜等效应的影响，致使其在高功率工作条件下，输出的慢轴方向发散角较大。

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In order to develop this kind of variable focus lens, the continuous change of the refractive index of liquid crystal by the voltage applied to the crystal should be investigated.

研制这种变焦透镜的前提，首先要掌握液晶折射率随所加电压变化的规律。

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Both lens variants have a focus-ring made of grained black leather which is edged into two chrome rings seeming noble and a aperture-ring into black paintwork.

这两个镜头的变种有重点环制成颗粒黑色皮衣是微升分为两个似乎崇高铬环和光圈环成黑色油漆。

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The paper focuses on the immersion line-focusing ultrasonic transducer with cylinder curved acoustic lens used in intelligent pig, establishes a mathematical model of acoustic fields, calculates its acoustic field distribution and focal length.

论文针对智能猪用柱形曲面声透镜水浸式线聚焦探头，建立了其声场模型，并对其轴线声场和焦距进行了数值模拟。

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the volume of mobile phone lens is very small, the back focus length of lens is very short and resolution power of sensor is more and more high. the obverse projection method is limited because of protective glass and pixel of cmos/ ccd.

拍照手机镜头由于体积小、后焦短、所配感光器的像素越来越高，正投影法测量用的CMOS/CCD受其保护玻璃厚度和自身像素的制约而有局限性；

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The most pivotal technique is focalizing technique in HIFU technique. At present, self-focused 、 ultrasound phased array 、 acoustic lens and so on are in common use.

HIFU技术中最为关键的技术是聚焦技术，目前所采用的聚焦方式主要有：自聚焦、超声相控阵列聚焦、声透镜聚焦等。

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