聚焦位置

宽带泵浦激光的聚焦位置对SRS发生过程的影响

The influence of the focus position of broadband pump laser on SRS initiation process

而对于土壤样品，当激光束聚焦位置在样品表面以下0.2mm左右，等离子体辐射强度和物质烧蚀质量具有最大值。

If soil samples are used as the targets , the emission intensities of the laser plasma and the mass of ablated material have the maxima at a focus position about 0.2 mm below the sample surface .

空气中激光聚焦位置对Cu等离子体光谱的影响

Effect of deviation distance to focal spot on spectra of the laser-induced Cu plasma in air

激光聚焦位置对K9光学玻璃损伤的影响

Influence of laser focusing position on damage of K9 glass

用SEM获取图像并确定分析区域，使样品待分析区域位置与标样的校正点处于同一聚焦位置；

The analysis area is determinated under SEM image field , the analyzed area of the sample is focused to the same position as the calibrated point of the standard sample ;

结果表明：两种喷管均发生不同程度烧蚀，与相对聚焦位置和激光作用时间有关；

The results showed that the nozzles were ablated to different extent , depending on the relative focus position , working time etc.

利用三维形貌仪和电镜对加工表面进行了观察，分别研究了激光能量、脉冲次数、聚焦位置、光纤直径、刻蚀环境及后期处理对单线刻蚀的几何结构尺寸的影响。

Etched surfaces were observed by three-dimensional morphology observation instrument and the effect of the laser energy , pulse frequency , focusing position , fiber diameter , etching conditions and post-processing to the surface micro-geometry size were investigated .

研究并解决了无热化设计效果检测仪系统自动调焦的实现中的一系列关键技术，包括聚焦位置的搜索算法、最佳调焦区域的划分、自动调焦策略和调焦曲线拟合等。

Some key technologies and problem in system auto-focusing realization , such as system image preprocessing , focus strategy , focus point searching algorithm , the division of image focusing region , and the focus curve fitting , were researched and solved .

论文采用Delphi6.0开发工具，设计了一包含RS232串行通信、图像实时显示、图像捕获、自动聚焦、位置重现等多项功能的显微镜自动载物台测控软件。

The microscope control software was developed using Delphi 6.0 . It can actualize multiple functions such as RS232 serial communication , image real-time display , image acquisition , autofocus and position recurrence .

激光光束平行漂移对聚焦光斑位置影响的理论分析

Theoretical Analysis of the Influence of Laser Beam Parallel Wandering on the Position of Focusing Light Spot

离焦深度法是在离焦图像中直接获取目标物体深度信息的方法，其经过计算得到镜头与目标物体的距离，然后调整镜头到精确聚焦的位置，实现聚焦。

DFD obtains the focal depth of object target directly from defocus images , it moves the lens to the focused position with the calculation of the distance between lens and object target .

本仪器用于观测光斑模场的分辨度高于10μm，而用于测量自聚焦透镜焦点位置参数S的精度优于20μm.可广泛应用于科研和生产领域中。

The resolution of this instrument is higher than 19 μ m in observing the model field of tiny speckle , and the precision is better than 26 μ m for measuring the focus point position of GRIN rod lens .

结果当发射声束聚焦的焦点位置（即焦距）发生改变时，超声诊断图像的侧向分辨力没有产生变化。

Results When the focus position of ultrasonic wave emitted was changed , the lateral image resolution would not be changed .

在保持缝线与探头距离不变的情况下，改变发射声束聚焦的焦点位置，同时观察图像分辨力变化。

On the condition that the distance between suture and transducer was kept invariability , the focus position of ultrasonic wave emitted should be changed , at the same time , the changes of image resolution would be observed .

第二，根据散焦模型，由两物点在CCD成像面上弥散斑直径的大小关系判断实际成像面与聚焦像面的相对位置关系。

Secondly , judge the position relationship between actual image surface and focused image plane according to defocus model .

HLG光束的焦移与模指数m，n和α参数无关，这意味着m，n和α不同的HLG光束聚焦在同一位置。

There is a focal shift in HLG beams which is independent of the parameters m , n , and α, which means that HLG beams with different values of m , n ,α are focused at the same place .

话语调核重音具有信息聚焦功能，其位置受话语预设决定。

The placement of the nucleus is decided by presupposition of the utterance and functions as information focus ;

数值模拟结果表明，自适应扩束系统能够实现对飞行光束聚焦特性亦即焦点位置与焦斑大小的控制。

The simulation results indicate that the adaptive beam expander can be used to control the focusing length and spot size .

通过对泵浦能量积分计算晶体内基模光模式体积内被吸收的能量值，获得泵浦光在晶体内聚焦光斑的最佳位置。

By integral calculating the energy values absorbed inside the fundamental mode volume of crystal , one could obtain the best focal position in the crystal .

不同设计条件下聚焦形状不同，其聚焦相对位置在一定范围内可调节。

According to different focus shapes under different design conditions , the relative focus position can be adjusted in a certain range .

多聚焦图像融合是指将聚焦位置不同的几幅源图像通过一定的算法融合成为一幅每一位置都聚焦的新图像。

Multi-focus image fusion is to fuse several focus position different source images to get a new focused image through certain fusion algorithm .

为了研究改善超声检测横向分别率以及缺陷检测精度的方法，对聚焦换能器和非聚焦换能器的超声检测成像结果进行了比较，结果表明聚焦换能器在焦点位置具有较高的横向分辨率。

The images produced by focusing and unfocusing transducers were compared in order to improve the lateral resolution and defect detection accuracy in ultrasonic testing . And it was showed that the lateral resolution of focusing transducer was much higher at focus .

实验表明，与传统的单一聚焦评价函数和单一步长的聚焦算法相比较，该算法在保证聚焦速度的情况下显著地提高了聚焦位置的精度。

Experimental results show that the algorithm proposed greatly improves the accuracy of the focusing location while ensuring the focusing time , compared with the traditional algorithm .