Optic Design of Collimator with Large Aperture and Long Focal Length

Discussion about Off-Focus Influence on MTF for Long Focus Aerial Camera

长焦距航天遥感相机离焦对传递函数的影响

互联网摘选

Manufacturing for ruling concave metal grating with a long focal length

机械刻划长焦距凹面金属光栅的研制

互联网摘选

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.

用扫描电镜、Questar长焦显微监测系统等仪器实时观察siC/BN叠层陶瓷缺口试样在三点弯曲加载时裂纹发生、发展直至破坏的全过程。

互联网摘选

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。

互联网摘选

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。

互联网摘选

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。

互联网摘选

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，

互联网摘选

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。

互联网摘选

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。

互联网摘选

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。

互联网摘选

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。

互联网摘选

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。

互联网摘选

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。

互联网摘选

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

互联网摘选

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。

互联网摘选

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

互联网摘选

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

互联网摘选

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。

互联网摘选

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。

互联网摘选

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

互联网摘选