The toughening mechanism of SiC/ BN laminated ceramic was experimental studied. SEM and Questar remote measurement system was used to make real-time observation of crack initiation and propagation during three points bending tests.

Then we used three aspects in circuits, optical mechanic, and software to design and implement the short focal cross asymmetrical Czerny-Turner miniature spectrometer and the long focal cross symmetrical Czerny-Turner miniature spectrometer.

然后，分电路、光学、机械、软件四部分设计并实现了短焦交叉非对称Czerny-Turner微型光谱仪与长焦交叉对称Czerny-Turner微型光谱仪。

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Based on these, a novel method for long focal length measurement is presented, which is achieved by calculating the angle of Moire fringes formed by Talbot image of one Ronchi grating and another Ronchi grating.

在此基础上，本文提出了通过Ronchi光栅的Talbot效应形成Moiré条纹，由Moiré条纹的转角来计算长焦距透镜焦距值的方法。

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On the basis of Talbot effect of Ronchi grating, the influence of temperature on the stability of the measuring system of long focal length has been theoretically analyzed.

基于Ronchi光栅的泰伯效应，在理论上分析了温度场的波动对长焦距测量系统稳定性的影响。

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The new 77-millimeter telephoto enables beautiful, classic portraiture photos

全新77mm长焦摄像头带来精美、经典的人像照片，

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In this paper a method for measuring the long focal length of lenses is described. The principle of the method is based on Talbot interferometry.

报道测量透镜长焦距的一种方法，测量原理是Talbot干涉。

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If you think that using a300mm makes you a Street Photographer, you are dreaming.

如果你想用300mm长焦成为街头摄影师，那是做梦。

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Recent years, it appears a new digital close-range photogrammetry system called Image Total Station System. There are two CCD cameras inside the image total station, which can realize real 'no-touch measurement'.

图像全站仪系统是近几年出现的一种新的数字近景摄影测量系统，在图像全站仪内部集成有广角和长焦两个CCD相机，它可以实现真正的无接触测量。

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While it's true that stabilization is nowhere near as essential as it is on a long telephoto, this doesn't make it superfluous.

确实，广角不如长焦这么迫切需要稳定性，但并不是说VR就是多余的。

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Chi says it will publish 26 pages of the images taken with a long lens from hundreds of meters away on Monday.

《Chi》还宣布将在周一刊登26幅照片，这些照片都是狗仔队在数百米外通过长焦镜头拍摄的。

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For the space coupling of pumped solid-state laser, the short focal lens are excelled long focal lens.

对于空间耦合泵浦固体激光器的光纤耦合LD的输出光束，使用短焦距的透镜要优于使用长焦距的透镜。

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Design of long focal-depth optical element for plasma diagnostic system in ICF drivers

应用于ICF等离子体诊断系统的长焦深光学元件设计

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The CCD observations on a telescope with a long focal length will be of great importance for this very close conjunction phenomenon.

届时，这种非常近的合天象的长焦距望远镜的CCD观测将具有重要意义。

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Fabrication of Silicon Microlenses Array with Long Focus and Point Spread Function Measurement

长焦距Si微透镜阵列的制作及点扩散函数测量

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The Research of the Mechanism of Large-Aperture Long-Focus Space Camera's Door

大口径长焦距空间相机热门机构方案研究

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Also available is a lineup of long-focus reflectors ( for air-cooled types only) that irradiate UV light effectively.

也配备能够有效地照射UV光的长焦点型（仅风冷式）反射板。

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Based on the needs of this type of system, optical channel is proposed, the relation of the focus and view field is concluded according to the principles of imaging and the function of adjusting focus is realized.

结合该类系统的需要，提出了光学通道的概念。根据摄像机成像原理，得到了焦距与视场角的关系，实现了光学通道的变焦功能。

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Design of 2.5 × Zoom Camera Lens within Cell Phone

光学倍频过程中感应衍射及色散的研究2.5倍光学变焦内置式手机摄像镜头的设计

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By virtue of comparing two methods of zoom lens compensation? optical compensation and mechanical compensation, the former way is selected to achieve the zoom purpose.

通过对机械补偿和光学补偿法比较，选择光学补偿方法实现变焦目的。

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The design of the cam curves of the zoom system is critical to keep the precise, smooth and balance movement of the optical system.

变焦距光学系统凸轮曲线设计是保证光学系统变焦精确、平滑和驱动力均衡的关键。

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With dynamic optical theory, the image motion compensating group formula of the zoom optical system is derived, and the trace curve of the image motion compensating group is plotted.

首先应用动态光学理论推导出变焦光学系统的像移补偿组公式，从而得到像移补偿组的轨迹曲线。

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