At present, some difficulties are encountered in measurement of long focal length of lens.
目前，透镜长焦距的有效测量还存在一些难题。
In that case, Fourier transform system with long focal length and high power lens and method of linear decision are proposed.
以肺癌细胞筛选为例，提出用长焦距、高倍率的傅里叶变换系统和线性判别处理。
Experiment data demonstrates that this method can be applied to the real-time long focal length measurement with high accuracy.
实验结果表明，这种方法能够实时地、非常精确地测量长焦距。
If you wish to photograph the moon retaining as much detail as possible with a minimum of cropping to fill the frame, you need lenses with a long focal length.
如果你想拍摄月球保留尽可能多的细节用最少的种植来构图，镜头的焦距。
A new method for long focal length measurement is presented, which is accomplished by obtaining the Angle of moire stripe formed by Talbot effect of Ronchi grating.
提出通过对龙基光栅的塔尔博特效应所产生的莫尔条纹角度的计量来测量长焦距的方法。
A method is introduced for testing stray light coefficient, vignetting coefficient and image surface uniformity optical system with large aperture and long focal length.
叙述一种用于测试大口径、长焦距光学系统杂光系数、渐晕系数、像面照度均匀性等光学参数的检测方法。
At present, some difficulties are encountered in measurement of long focal-length of mirrors.
目前，大口径长焦距反射镜焦距的精确测量存在很大难题。
Focal length is the important optical parameter of optical lens. It is valuable that methods based on Talbot effect and Moire technique are applied for measuring the long focal of lens.
焦距是透镜最重要的光学参数，应用泰伯—莫尔法测量长焦距透镜焦距具有重要的实践价值。
Focal length is the important optical parameter of optical lens. It is valuable that methods based on Talbot effect and Moire technique are applied for measuring the long focal of lens.
焦距是透镜最重要的光学参数，应用泰伯—莫尔法测量长焦距透镜焦距具有重要的实践价值。
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